./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/transmitter.07.cil.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_d1b86aa5-173a-4b96-9f4d-b24d62eecb6f/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1b86aa5-173a-4b96-9f4d-b24d62eecb6f/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_d1b86aa5-173a-4b96-9f4d-b24d62eecb6f/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1b86aa5-173a-4b96-9f4d-b24d62eecb6f/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/transmitter.07.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1b86aa5-173a-4b96-9f4d-b24d62eecb6f/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_d1b86aa5-173a-4b96-9f4d-b24d62eecb6f/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 022987cd4c8c671e376c5c3e5a08e2f1b98444b4d5d48bc73787bff74aa0de0f --- 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 08:56:55,485 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 08:56:55,487 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 08:56:55,501 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 08:56:55,501 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 08:56:55,502 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 08:56:55,503 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 08:56:55,504 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 08:56:55,505 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 08:56:55,506 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 08:56:55,507 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 08:56:55,508 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 08:56:55,508 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 08:56:55,509 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 08:56:55,509 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 08:56:55,510 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 08:56:55,511 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 08:56:55,511 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 08:56:55,513 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 08:56:55,514 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 08:56:55,515 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 08:56:55,516 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 08:56:55,517 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 08:56:55,517 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 08:56:55,520 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 08:56:55,520 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 08:56:55,520 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 08:56:55,521 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 08:56:55,521 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 08:56:55,522 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 08:56:55,522 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 08:56:55,522 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 08:56:55,523 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 08:56:55,523 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 08:56:55,524 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 08:56:55,524 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 08:56:55,525 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 08:56:55,525 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 08:56:55,525 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 08:56:55,526 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 08:56:55,526 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 08:56:55,527 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1b86aa5-173a-4b96-9f4d-b24d62eecb6f/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 08:56:55,542 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 08:56:55,542 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 08:56:55,542 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 08:56:55,542 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 08:56:55,543 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 08:56:55,543 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 08:56:55,543 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 08:56:55,543 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 08:56:55,543 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 08:56:55,543 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 08:56:55,544 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 08:56:55,544 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 08:56:55,544 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 08:56:55,544 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 08:56:55,544 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 08:56:55,544 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 08:56:55,544 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 08:56:55,544 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 08:56:55,545 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 08:56:55,545 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 08:56:55,545 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 08:56:55,545 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 08:56:55,545 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 08:56:55,545 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 08:56:55,546 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 08:56:55,546 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 08:56:55,546 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 08:56:55,546 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 08:56:55,546 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 08:56:55,546 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 08:56:55,546 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 08:56:55,546 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 08:56:55,547 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:56:55,547 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 08:56:55,547 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 08:56:55,547 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 08:56:55,547 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 08:56:55,547 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 08:56:55,547 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 08:56:55,547 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 08:56:55,547 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 08:56:55,548 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_d1b86aa5-173a-4b96-9f4d-b24d62eecb6f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1b86aa5-173a-4b96-9f4d-b24d62eecb6f/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 022987cd4c8c671e376c5c3e5a08e2f1b98444b4d5d48bc73787bff74aa0de0f [2022-12-14 08:56:55,709 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 08:56:55,725 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 08:56:55,727 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 08:56:55,728 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 08:56:55,729 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 08:56:55,730 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1b86aa5-173a-4b96-9f4d-b24d62eecb6f/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/systemc/transmitter.07.cil.c [2022-12-14 08:56:58,441 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 08:56:58,603 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 08:56:58,603 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1b86aa5-173a-4b96-9f4d-b24d62eecb6f/sv-benchmarks/c/systemc/transmitter.07.cil.c [2022-12-14 08:56:58,614 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1b86aa5-173a-4b96-9f4d-b24d62eecb6f/bin/utaipan-gh47qXpMRh/data/3b63f71e7/1ba279e9244a49f2aea2de01569f78f1/FLAGd3e6c77a7 [2022-12-14 08:56:58,624 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1b86aa5-173a-4b96-9f4d-b24d62eecb6f/bin/utaipan-gh47qXpMRh/data/3b63f71e7/1ba279e9244a49f2aea2de01569f78f1 [2022-12-14 08:56:58,627 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 08:56:58,628 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 08:56:58,629 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 08:56:58,629 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 08:56:58,632 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 08:56:58,632 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:56:58" (1/1) ... [2022-12-14 08:56:58,633 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25c0799a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:56:58, skipping insertion in model container [2022-12-14 08:56:58,634 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:56:58" (1/1) ... [2022-12-14 08:56:58,639 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 08:56:58,671 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 08:56:58,784 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_d1b86aa5-173a-4b96-9f4d-b24d62eecb6f/sv-benchmarks/c/systemc/transmitter.07.cil.c[706,719] [2022-12-14 08:56:58,865 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:56:58,877 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 08:56:58,888 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_d1b86aa5-173a-4b96-9f4d-b24d62eecb6f/sv-benchmarks/c/systemc/transmitter.07.cil.c[706,719] [2022-12-14 08:56:58,933 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:56:58,947 INFO L208 MainTranslator]: Completed translation [2022-12-14 08:56:58,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:56:58 WrapperNode [2022-12-14 08:56:58,947 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 08:56:58,948 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 08:56:58,948 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 08:56:58,948 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 08:56:58,953 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:56:58" (1/1) ... [2022-12-14 08:56:58,963 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:56:58" (1/1) ... [2022-12-14 08:56:58,994 INFO L138 Inliner]: procedures = 42, calls = 51, calls flagged for inlining = 26, calls inlined = 26, statements flattened = 549 [2022-12-14 08:56:58,995 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 08:56:58,995 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 08:56:58,995 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 08:56:58,996 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 08:56:59,003 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:56:58" (1/1) ... [2022-12-14 08:56:59,004 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:56:58" (1/1) ... [2022-12-14 08:56:59,007 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:56:58" (1/1) ... [2022-12-14 08:56:59,007 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:56:58" (1/1) ... [2022-12-14 08:56:59,015 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:56:58" (1/1) ... [2022-12-14 08:56:59,024 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:56:58" (1/1) ... [2022-12-14 08:56:59,026 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:56:58" (1/1) ... [2022-12-14 08:56:59,028 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:56:58" (1/1) ... [2022-12-14 08:56:59,032 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 08:56:59,033 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 08:56:59,033 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 08:56:59,033 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 08:56:59,034 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:56:58" (1/1) ... [2022-12-14 08:56:59,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:56:59,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1b86aa5-173a-4b96-9f4d-b24d62eecb6f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:56:59,063 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1b86aa5-173a-4b96-9f4d-b24d62eecb6f/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 08:56:59,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1b86aa5-173a-4b96-9f4d-b24d62eecb6f/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 08:56:59,098 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 08:56:59,098 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-12-14 08:56:59,098 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-12-14 08:56:59,099 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-12-14 08:56:59,099 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-12-14 08:56:59,099 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-12-14 08:56:59,099 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-12-14 08:56:59,099 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-12-14 08:56:59,099 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-12-14 08:56:59,099 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-12-14 08:56:59,099 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-12-14 08:56:59,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 08:56:59,100 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-12-14 08:56:59,100 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-12-14 08:56:59,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 08:56:59,100 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 08:56:59,179 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 08:56:59,181 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 08:56:59,642 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 08:56:59,821 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 08:56:59,821 INFO L300 CfgBuilder]: Removed 11 assume(true) statements. [2022-12-14 08:56:59,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:56:59 BoogieIcfgContainer [2022-12-14 08:56:59,823 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 08:56:59,825 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 08:56:59,825 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 08:56:59,827 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 08:56:59,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 08:56:58" (1/3) ... [2022-12-14 08:56:59,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@136edf1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:56:59, skipping insertion in model container [2022-12-14 08:56:59,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:56:58" (2/3) ... [2022-12-14 08:56:59,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@136edf1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:56:59, skipping insertion in model container [2022-12-14 08:56:59,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:56:59" (3/3) ... [2022-12-14 08:56:59,829 INFO L112 eAbstractionObserver]: Analyzing ICFG transmitter.07.cil.c [2022-12-14 08:56:59,843 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 08:56:59,843 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 08:56:59,878 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 08:56:59,883 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;@34b2e2b5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 08:56:59,883 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 08:56:59,886 INFO L276 IsEmpty]: Start isEmpty. Operand has 131 states, 103 states have (on average 1.5436893203883495) internal successors, (159), 105 states have internal predecessors, (159), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-12-14 08:56:59,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-14 08:56:59,893 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:56:59,894 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] [2022-12-14 08:56:59,894 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:56:59,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:56:59,898 INFO L85 PathProgramCache]: Analyzing trace with hash -336216075, now seen corresponding path program 1 times [2022-12-14 08:56:59,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:56:59,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517834120] [2022-12-14 08:56:59,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:56:59,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:57:00,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:57:00,224 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 08:57:00,225 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:57:00,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517834120] [2022-12-14 08:57:00,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517834120] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:57:00,226 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:57:00,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 08:57:00,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871134072] [2022-12-14 08:57:00,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:57:00,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:57:00,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:57:00,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:57:00,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:57:00,261 INFO L87 Difference]: Start difference. First operand has 131 states, 103 states have (on average 1.5436893203883495) internal successors, (159), 105 states have internal predecessors, (159), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 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 08:57:00,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:57:00,547 INFO L93 Difference]: Finished difference Result 376 states and 589 transitions. [2022-12-14 08:57:00,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 08:57:00,549 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 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 57 [2022-12-14 08:57:00,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:57:00,556 INFO L225 Difference]: With dead ends: 376 [2022-12-14 08:57:00,556 INFO L226 Difference]: Without dead ends: 246 [2022-12-14 08:57:00,559 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 08:57:00,561 INFO L413 NwaCegarLoop]: 294 mSDtfsCounter, 334 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:57:00,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [334 Valid, 518 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:57:00,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-12-14 08:57:00,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 243. [2022-12-14 08:57:00,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 195 states have (on average 1.476923076923077) internal successors, (288), 196 states have internal predecessors, (288), 35 states have call successors, (35), 12 states have call predecessors, (35), 12 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-12-14 08:57:00,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 358 transitions. [2022-12-14 08:57:00,624 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 358 transitions. Word has length 57 [2022-12-14 08:57:00,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:57:00,625 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 358 transitions. [2022-12-14 08:57:00,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 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 08:57:00,625 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 358 transitions. [2022-12-14 08:57:00,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-14 08:57:00,627 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:57:00,627 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] [2022-12-14 08:57:00,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 08:57:00,627 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:57:00,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:57:00,628 INFO L85 PathProgramCache]: Analyzing trace with hash 2065309046, now seen corresponding path program 1 times [2022-12-14 08:57:00,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:57:00,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87724311] [2022-12-14 08:57:00,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:57:00,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:57:00,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:57:00,723 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 08:57:00,723 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:57:00,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87724311] [2022-12-14 08:57:00,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87724311] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:57:00,724 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:57:00,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 08:57:00,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510395988] [2022-12-14 08:57:00,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:57:00,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 08:57:00,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:57:00,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 08:57:00,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:57:00,727 INFO L87 Difference]: Start difference. First operand 243 states and 358 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 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 08:57:01,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:57:01,159 INFO L93 Difference]: Finished difference Result 825 states and 1227 transitions. [2022-12-14 08:57:01,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 08:57:01,160 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 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 57 [2022-12-14 08:57:01,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:57:01,163 INFO L225 Difference]: With dead ends: 825 [2022-12-14 08:57:01,163 INFO L226 Difference]: Without dead ends: 566 [2022-12-14 08:57:01,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 08:57:01,165 INFO L413 NwaCegarLoop]: 315 mSDtfsCounter, 680 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 688 SdHoareTripleChecker+Valid, 828 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:57:01,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [688 Valid, 828 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 08:57:01,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2022-12-14 08:57:01,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 554. [2022-12-14 08:57:01,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 457 states have (on average 1.4704595185995624) internal successors, (672), 452 states have internal predecessors, (672), 68 states have call successors, (68), 26 states have call predecessors, (68), 28 states have return successors, (76), 76 states have call predecessors, (76), 68 states have call successors, (76) [2022-12-14 08:57:01,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 816 transitions. [2022-12-14 08:57:01,225 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 816 transitions. Word has length 57 [2022-12-14 08:57:01,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:57:01,225 INFO L495 AbstractCegarLoop]: Abstraction has 554 states and 816 transitions. [2022-12-14 08:57:01,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 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 08:57:01,226 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 816 transitions. [2022-12-14 08:57:01,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-14 08:57:01,227 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:57:01,227 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] [2022-12-14 08:57:01,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 08:57:01,227 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:57:01,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:57:01,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1580134327, now seen corresponding path program 1 times [2022-12-14 08:57:01,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:57:01,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499583659] [2022-12-14 08:57:01,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:57:01,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:57:01,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:57:01,310 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 08:57:01,310 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:57:01,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499583659] [2022-12-14 08:57:01,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499583659] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:57:01,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:57:01,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 08:57:01,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131848622] [2022-12-14 08:57:01,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:57:01,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 08:57:01,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:57:01,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 08:57:01,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:57:01,313 INFO L87 Difference]: Start difference. First operand 554 states and 816 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 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 08:57:01,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:57:01,729 INFO L93 Difference]: Finished difference Result 1925 states and 2870 transitions. [2022-12-14 08:57:01,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 08:57:01,730 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 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 57 [2022-12-14 08:57:01,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:57:01,741 INFO L225 Difference]: With dead ends: 1925 [2022-12-14 08:57:01,741 INFO L226 Difference]: Without dead ends: 1337 [2022-12-14 08:57:01,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 08:57:01,746 INFO L413 NwaCegarLoop]: 315 mSDtfsCounter, 680 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 688 SdHoareTripleChecker+Valid, 809 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:57:01,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [688 Valid, 809 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 08:57:01,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1337 states. [2022-12-14 08:57:01,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1337 to 1045. [2022-12-14 08:57:01,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1045 states, 864 states have (on average 1.4699074074074074) internal successors, (1270), 860 states have internal predecessors, (1270), 124 states have call successors, (124), 50 states have call predecessors, (124), 56 states have return successors, (147), 135 states have call predecessors, (147), 124 states have call successors, (147) [2022-12-14 08:57:01,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 1541 transitions. [2022-12-14 08:57:01,829 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 1541 transitions. Word has length 57 [2022-12-14 08:57:01,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:57:01,830 INFO L495 AbstractCegarLoop]: Abstraction has 1045 states and 1541 transitions. [2022-12-14 08:57:01,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 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 08:57:01,830 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 1541 transitions. [2022-12-14 08:57:01,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-14 08:57:01,833 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:57:01,833 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] [2022-12-14 08:57:01,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 08:57:01,833 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:57:01,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:57:01,834 INFO L85 PathProgramCache]: Analyzing trace with hash 2103454998, now seen corresponding path program 1 times [2022-12-14 08:57:01,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:57:01,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600329313] [2022-12-14 08:57:01,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:57:01,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:57:01,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:57:01,924 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 08:57:01,924 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:57:01,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600329313] [2022-12-14 08:57:01,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600329313] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:57:01,924 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:57:01,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 08:57:01,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142207938] [2022-12-14 08:57:01,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:57:01,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:57:01,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:57:01,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:57:01,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:57:01,926 INFO L87 Difference]: Start difference. First operand 1045 states and 1541 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 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 08:57:02,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:57:02,199 INFO L93 Difference]: Finished difference Result 3096 states and 4636 transitions. [2022-12-14 08:57:02,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 08:57:02,200 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 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 57 [2022-12-14 08:57:02,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:57:02,213 INFO L225 Difference]: With dead ends: 3096 [2022-12-14 08:57:02,213 INFO L226 Difference]: Without dead ends: 2056 [2022-12-14 08:57:02,216 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 08:57:02,217 INFO L413 NwaCegarLoop]: 293 mSDtfsCounter, 349 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:57:02,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [349 Valid, 516 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:57:02,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2056 states. [2022-12-14 08:57:02,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2056 to 2044. [2022-12-14 08:57:02,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2044 states, 1695 states have (on average 1.456047197640118) internal successors, (2468), 1687 states have internal predecessors, (2468), 236 states have call successors, (236), 100 states have call predecessors, (236), 112 states have return successors, (279), 257 states have call predecessors, (279), 236 states have call successors, (279) [2022-12-14 08:57:02,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2044 states to 2044 states and 2983 transitions. [2022-12-14 08:57:02,327 INFO L78 Accepts]: Start accepts. Automaton has 2044 states and 2983 transitions. Word has length 57 [2022-12-14 08:57:02,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:57:02,328 INFO L495 AbstractCegarLoop]: Abstraction has 2044 states and 2983 transitions. [2022-12-14 08:57:02,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 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 08:57:02,328 INFO L276 IsEmpty]: Start isEmpty. Operand 2044 states and 2983 transitions. [2022-12-14 08:57:02,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-14 08:57:02,329 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:57:02,330 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] [2022-12-14 08:57:02,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 08:57:02,330 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:57:02,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:57:02,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1272537675, now seen corresponding path program 1 times [2022-12-14 08:57:02,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:57:02,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622216929] [2022-12-14 08:57:02,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:57:02,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:57:02,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:57:02,403 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 08:57:02,403 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:57:02,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622216929] [2022-12-14 08:57:02,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622216929] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:57:02,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:57:02,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 08:57:02,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597844457] [2022-12-14 08:57:02,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:57:02,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:57:02,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:57:02,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:57:02,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:57:02,406 INFO L87 Difference]: Start difference. First operand 2044 states and 2983 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 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 08:57:02,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:57:02,791 INFO L93 Difference]: Finished difference Result 6097 states and 9058 transitions. [2022-12-14 08:57:02,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 08:57:02,791 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 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 57 [2022-12-14 08:57:02,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:57:02,806 INFO L225 Difference]: With dead ends: 6097 [2022-12-14 08:57:02,806 INFO L226 Difference]: Without dead ends: 4058 [2022-12-14 08:57:02,811 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 08:57:02,812 INFO L413 NwaCegarLoop]: 295 mSDtfsCounter, 357 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:57:02,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 518 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:57:02,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4058 states. [2022-12-14 08:57:03,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4058 to 4040. [2022-12-14 08:57:03,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4040 states, 3347 states have (on average 1.4380041828503136) internal successors, (4813), 3330 states have internal predecessors, (4813), 468 states have call successors, (468), 200 states have call predecessors, (468), 224 states have return successors, (554), 510 states have call predecessors, (554), 468 states have call successors, (554) [2022-12-14 08:57:03,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4040 states to 4040 states and 5835 transitions. [2022-12-14 08:57:03,083 INFO L78 Accepts]: Start accepts. Automaton has 4040 states and 5835 transitions. Word has length 57 [2022-12-14 08:57:03,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:57:03,083 INFO L495 AbstractCegarLoop]: Abstraction has 4040 states and 5835 transitions. [2022-12-14 08:57:03,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 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 08:57:03,084 INFO L276 IsEmpty]: Start isEmpty. Operand 4040 states and 5835 transitions. [2022-12-14 08:57:03,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-12-14 08:57:03,088 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:57:03,088 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:57:03,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 08:57:03,089 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:57:03,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:57:03,089 INFO L85 PathProgramCache]: Analyzing trace with hash 858206456, now seen corresponding path program 1 times [2022-12-14 08:57:03,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:57:03,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323784101] [2022-12-14 08:57:03,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:57:03,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:57:03,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:57:03,272 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 08:57:03,272 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:57:03,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323784101] [2022-12-14 08:57:03,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323784101] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:57:03,273 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:57:03,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 08:57:03,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394368470] [2022-12-14 08:57:03,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:57:03,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:57:03,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:57:03,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:57:03,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:57:03,274 INFO L87 Difference]: Start difference. First operand 4040 states and 5835 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 08:57:03,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:57:03,925 INFO L93 Difference]: Finished difference Result 12304 states and 17807 transitions. [2022-12-14 08:57:03,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 08:57:03,925 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 74 [2022-12-14 08:57:03,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:57:03,968 INFO L225 Difference]: With dead ends: 12304 [2022-12-14 08:57:03,969 INFO L226 Difference]: Without dead ends: 8270 [2022-12-14 08:57:03,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 08:57:03,982 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 680 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 687 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:57:03,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [687 Valid, 461 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:57:03,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8270 states. [2022-12-14 08:57:04,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8270 to 6796. [2022-12-14 08:57:04,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6796 states, 5695 states have (on average 1.424231782265145) internal successors, (8111), 5660 states have internal predecessors, (8111), 716 states have call successors, (716), 336 states have call predecessors, (716), 384 states have return successors, (888), 800 states have call predecessors, (888), 716 states have call successors, (888) [2022-12-14 08:57:04,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6796 states to 6796 states and 9715 transitions. [2022-12-14 08:57:04,333 INFO L78 Accepts]: Start accepts. Automaton has 6796 states and 9715 transitions. Word has length 74 [2022-12-14 08:57:04,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:57:04,334 INFO L495 AbstractCegarLoop]: Abstraction has 6796 states and 9715 transitions. [2022-12-14 08:57:04,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 08:57:04,334 INFO L276 IsEmpty]: Start isEmpty. Operand 6796 states and 9715 transitions. [2022-12-14 08:57:04,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-12-14 08:57:04,336 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:57:04,337 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:57:04,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 08:57:04,337 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:57:04,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:57:04,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1509444840, now seen corresponding path program 1 times [2022-12-14 08:57:04,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:57:04,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478758977] [2022-12-14 08:57:04,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:57:04,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:57:04,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:57:04,500 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 08:57:04,501 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:57:04,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478758977] [2022-12-14 08:57:04,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478758977] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:57:04,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:57:04,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 08:57:04,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600937945] [2022-12-14 08:57:04,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:57:04,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:57:04,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:57:04,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:57:04,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:57:04,503 INFO L87 Difference]: Start difference. First operand 6796 states and 9715 transitions. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 08:57:05,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:57:05,662 INFO L93 Difference]: Finished difference Result 24336 states and 34874 transitions. [2022-12-14 08:57:05,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 08:57:05,663 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 76 [2022-12-14 08:57:05,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:57:05,733 INFO L225 Difference]: With dead ends: 24336 [2022-12-14 08:57:05,733 INFO L226 Difference]: Without dead ends: 17546 [2022-12-14 08:57:05,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 08:57:05,753 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 699 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 714 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:57:05,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [714 Valid, 436 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:57:05,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17546 states. [2022-12-14 08:57:06,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17546 to 13256. [2022-12-14 08:57:06,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13256 states, 11107 states have (on average 1.4155937696947871) internal successors, (15723), 11044 states have internal predecessors, (15723), 1380 states have call successors, (1380), 672 states have call predecessors, (1380), 768 states have return successors, (1700), 1540 states have call predecessors, (1700), 1380 states have call successors, (1700) [2022-12-14 08:57:06,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13256 states to 13256 states and 18803 transitions. [2022-12-14 08:57:06,647 INFO L78 Accepts]: Start accepts. Automaton has 13256 states and 18803 transitions. Word has length 76 [2022-12-14 08:57:06,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:57:06,647 INFO L495 AbstractCegarLoop]: Abstraction has 13256 states and 18803 transitions. [2022-12-14 08:57:06,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 08:57:06,648 INFO L276 IsEmpty]: Start isEmpty. Operand 13256 states and 18803 transitions. [2022-12-14 08:57:06,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-12-14 08:57:06,652 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:57:06,652 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:57:06,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 08:57:06,652 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:57:06,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:57:06,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1174217048, now seen corresponding path program 1 times [2022-12-14 08:57:06,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:57:06,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908454138] [2022-12-14 08:57:06,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:57:06,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:57:06,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:57:06,804 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 08:57:06,804 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:57:06,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908454138] [2022-12-14 08:57:06,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908454138] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:57:06,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:57:06,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 08:57:06,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263334750] [2022-12-14 08:57:06,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:57:06,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:57:06,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:57:06,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:57:06,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:57:06,806 INFO L87 Difference]: Start difference. First operand 13256 states and 18803 transitions. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 08:57:08,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:57:08,279 INFO L93 Difference]: Finished difference Result 37140 states and 52853 transitions. [2022-12-14 08:57:08,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 08:57:08,280 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 78 [2022-12-14 08:57:08,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:57:08,343 INFO L225 Difference]: With dead ends: 37140 [2022-12-14 08:57:08,344 INFO L226 Difference]: Without dead ends: 23890 [2022-12-14 08:57:08,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 08:57:08,370 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 574 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 580 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:57:08,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [580 Valid, 581 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 08:57:08,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23890 states. [2022-12-14 08:57:09,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23890 to 19824. [2022-12-14 08:57:09,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19824 states, 16595 states have (on average 1.408315757758361) internal successors, (23371), 16468 states have internal predecessors, (23371), 2076 states have call successors, (2076), 1024 states have call predecessors, (2076), 1152 states have return successors, (2492), 2332 states have call predecessors, (2492), 2076 states have call successors, (2492) [2022-12-14 08:57:09,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19824 states to 19824 states and 27939 transitions. [2022-12-14 08:57:09,594 INFO L78 Accepts]: Start accepts. Automaton has 19824 states and 27939 transitions. Word has length 78 [2022-12-14 08:57:09,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:57:09,594 INFO L495 AbstractCegarLoop]: Abstraction has 19824 states and 27939 transitions. [2022-12-14 08:57:09,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 08:57:09,594 INFO L276 IsEmpty]: Start isEmpty. Operand 19824 states and 27939 transitions. [2022-12-14 08:57:09,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-12-14 08:57:09,601 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:57:09,601 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:57:09,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 08:57:09,601 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:57:09,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:57:09,602 INFO L85 PathProgramCache]: Analyzing trace with hash -679184336, now seen corresponding path program 1 times [2022-12-14 08:57:09,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:57:09,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886085592] [2022-12-14 08:57:09,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:57:09,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:57:09,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:57:09,743 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 08:57:09,743 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:57:09,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886085592] [2022-12-14 08:57:09,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886085592] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:57:09,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:57:09,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 08:57:09,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582019477] [2022-12-14 08:57:09,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:57:09,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:57:09,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:57:09,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:57:09,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:57:09,746 INFO L87 Difference]: Start difference. First operand 19824 states and 27939 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 08:57:11,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:57:11,475 INFO L93 Difference]: Finished difference Result 49404 states and 69573 transitions. [2022-12-14 08:57:11,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 08:57:11,476 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 80 [2022-12-14 08:57:11,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:57:11,550 INFO L225 Difference]: With dead ends: 49404 [2022-12-14 08:57:11,550 INFO L226 Difference]: Without dead ends: 29586 [2022-12-14 08:57:11,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-12-14 08:57:11,583 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 499 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:57:11,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [514 Valid, 446 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:57:11,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29586 states. [2022-12-14 08:57:13,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29586 to 29584. [2022-12-14 08:57:13,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29584 states, 24779 states have (on average 1.4032446829976997) internal successors, (34771), 24588 states have internal predecessors, (34771), 3092 states have call successors, (3092), 1552 states have call predecessors, (3092), 1712 states have return successors, (3604), 3444 states have call predecessors, (3604), 3092 states have call successors, (3604) [2022-12-14 08:57:13,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29584 states to 29584 states and 41467 transitions. [2022-12-14 08:57:13,212 INFO L78 Accepts]: Start accepts. Automaton has 29584 states and 41467 transitions. Word has length 80 [2022-12-14 08:57:13,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:57:13,212 INFO L495 AbstractCegarLoop]: Abstraction has 29584 states and 41467 transitions. [2022-12-14 08:57:13,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 08:57:13,212 INFO L276 IsEmpty]: Start isEmpty. Operand 29584 states and 41467 transitions. [2022-12-14 08:57:13,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-12-14 08:57:13,220 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:57:13,220 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:57:13,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 08:57:13,220 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:57:13,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:57:13,221 INFO L85 PathProgramCache]: Analyzing trace with hash 329420824, now seen corresponding path program 1 times [2022-12-14 08:57:13,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:57:13,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836517720] [2022-12-14 08:57:13,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:57:13,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:57:13,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:57:13,395 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 08:57:13,396 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:57:13,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836517720] [2022-12-14 08:57:13,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836517720] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:57:13,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:57:13,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 08:57:13,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204949390] [2022-12-14 08:57:13,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:57:13,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:57:13,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:57:13,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:57:13,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:57:13,398 INFO L87 Difference]: Start difference. First operand 29584 states and 41467 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 08:57:16,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:57:16,383 INFO L93 Difference]: Finished difference Result 77314 states and 109015 transitions. [2022-12-14 08:57:16,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 08:57:16,383 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 82 [2022-12-14 08:57:16,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:57:16,495 INFO L225 Difference]: With dead ends: 77314 [2022-12-14 08:57:16,495 INFO L226 Difference]: Without dead ends: 47736 [2022-12-14 08:57:16,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 08:57:16,540 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 524 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:57:16,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [530 Valid, 536 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:57:16,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47736 states. [2022-12-14 08:57:19,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47736 to 43870. [2022-12-14 08:57:19,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43870 states, 36719 states have (on average 1.3983768621149812) internal successors, (51347), 36444 states have internal predecessors, (51347), 4582 states have call successors, (4582), 2328 states have call predecessors, (4582), 2568 states have return successors, (5330), 5098 states have call predecessors, (5330), 4582 states have call successors, (5330) [2022-12-14 08:57:19,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43870 states to 43870 states and 61259 transitions. [2022-12-14 08:57:19,235 INFO L78 Accepts]: Start accepts. Automaton has 43870 states and 61259 transitions. Word has length 82 [2022-12-14 08:57:19,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:57:19,236 INFO L495 AbstractCegarLoop]: Abstraction has 43870 states and 61259 transitions. [2022-12-14 08:57:19,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 08:57:19,236 INFO L276 IsEmpty]: Start isEmpty. Operand 43870 states and 61259 transitions. [2022-12-14 08:57:19,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-12-14 08:57:19,245 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:57:19,245 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:57:19,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 08:57:19,245 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:57:19,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:57:19,246 INFO L85 PathProgramCache]: Analyzing trace with hash -870137488, now seen corresponding path program 1 times [2022-12-14 08:57:19,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:57:19,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169813089] [2022-12-14 08:57:19,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:57:19,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:57:19,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:57:19,405 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 08:57:19,406 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:57:19,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169813089] [2022-12-14 08:57:19,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169813089] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:57:19,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:57:19,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 08:57:19,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787002322] [2022-12-14 08:57:19,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:57:19,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:57:19,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:57:19,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:57:19,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:57:19,408 INFO L87 Difference]: Start difference. First operand 43870 states and 61259 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 08:57:25,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:57:25,274 INFO L93 Difference]: Finished difference Result 136374 states and 190884 transitions. [2022-12-14 08:57:25,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 08:57:25,274 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 84 [2022-12-14 08:57:25,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:57:25,516 INFO L225 Difference]: With dead ends: 136374 [2022-12-14 08:57:25,516 INFO L226 Difference]: Without dead ends: 92510 [2022-12-14 08:57:25,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 08:57:25,580 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 521 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:57:25,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [536 Valid, 478 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:57:25,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92510 states. [2022-12-14 08:57:30,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92510 to 85332. [2022-12-14 08:57:30,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85332 states, 71359 states have (on average 1.3877857032749898) internal successors, (99031), 70880 states have internal predecessors, (99031), 8836 states have call successors, (8836), 4656 states have call predecessors, (8836), 5136 states have return successors, (10212), 9796 states have call predecessors, (10212), 8836 states have call successors, (10212) [2022-12-14 08:57:31,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85332 states to 85332 states and 118079 transitions. [2022-12-14 08:57:31,086 INFO L78 Accepts]: Start accepts. Automaton has 85332 states and 118079 transitions. Word has length 84 [2022-12-14 08:57:31,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:57:31,086 INFO L495 AbstractCegarLoop]: Abstraction has 85332 states and 118079 transitions. [2022-12-14 08:57:31,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 08:57:31,087 INFO L276 IsEmpty]: Start isEmpty. Operand 85332 states and 118079 transitions. [2022-12-14 08:57:31,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-12-14 08:57:31,100 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:57:31,100 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:57:31,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 08:57:31,100 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:57:31,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:57:31,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1997558744, now seen corresponding path program 1 times [2022-12-14 08:57:31,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:57:31,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433743619] [2022-12-14 08:57:31,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:57:31,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:57:31,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:57:31,162 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 08:57:31,162 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:57:31,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433743619] [2022-12-14 08:57:31,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433743619] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:57:31,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:57:31,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:57:31,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820508546] [2022-12-14 08:57:31,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:57:31,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:57:31,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:57:31,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:57:31,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:57:31,164 INFO L87 Difference]: Start difference. First operand 85332 states and 118079 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 08:57:38,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:57:38,798 INFO L93 Difference]: Finished difference Result 161802 states and 227100 transitions. [2022-12-14 08:57:38,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:57:38,799 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 86 [2022-12-14 08:57:38,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:57:39,181 INFO L225 Difference]: With dead ends: 161802 [2022-12-14 08:57:39,181 INFO L226 Difference]: Without dead ends: 108948 [2022-12-14 08:57:39,281 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 08:57:39,282 INFO L413 NwaCegarLoop]: 277 mSDtfsCounter, 120 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:57:39,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 441 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:57:39,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108948 states. [2022-12-14 08:57:45,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108948 to 87978. [2022-12-14 08:57:45,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87978 states, 74077 states have (on average 1.4087098559606896) internal successors, (104353), 73838 states have internal predecessors, (104353), 8848 states have call successors, (8848), 4812 states have call predecessors, (8848), 5052 states have return successors, (9536), 9328 states have call predecessors, (9536), 8848 states have call successors, (9536) [2022-12-14 08:57:45,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87978 states to 87978 states and 122737 transitions. [2022-12-14 08:57:45,386 INFO L78 Accepts]: Start accepts. Automaton has 87978 states and 122737 transitions. Word has length 86 [2022-12-14 08:57:45,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:57:45,386 INFO L495 AbstractCegarLoop]: Abstraction has 87978 states and 122737 transitions. [2022-12-14 08:57:45,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 08:57:45,386 INFO L276 IsEmpty]: Start isEmpty. Operand 87978 states and 122737 transitions. [2022-12-14 08:57:45,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-12-14 08:57:45,466 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:57:45,466 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:57:45,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 08:57:45,466 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:57:45,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:57:45,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1876812774, now seen corresponding path program 1 times [2022-12-14 08:57:45,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:57:45,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552656260] [2022-12-14 08:57:45,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:57:45,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:57:45,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:57:45,520 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-12-14 08:57:45,520 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:57:45,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552656260] [2022-12-14 08:57:45,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552656260] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:57:45,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:57:45,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:57:45,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028846607] [2022-12-14 08:57:45,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:57:45,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:57:45,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:57:45,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:57:45,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:57:45,522 INFO L87 Difference]: Start difference. First operand 87978 states and 122737 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-12-14 08:57:53,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:57:53,913 INFO L93 Difference]: Finished difference Result 219639 states and 308184 transitions. [2022-12-14 08:57:53,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:57:53,913 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 121 [2022-12-14 08:57:53,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:57:54,239 INFO L225 Difference]: With dead ends: 219639 [2022-12-14 08:57:54,239 INFO L226 Difference]: Without dead ends: 131666 [2022-12-14 08:57:54,355 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 08:57:54,356 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 148 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:57:54,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 317 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:57:54,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131666 states. [2022-12-14 08:58:03,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131666 to 131128. [2022-12-14 08:58:03,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131128 states, 110441 states have (on average 1.3976783984208763) internal successors, (154361), 110100 states have internal predecessors, (154361), 13108 states have call successors, (13108), 7218 states have call predecessors, (13108), 7578 states have return successors, (14110), 13810 states have call predecessors, (14110), 13108 states have call successors, (14110) [2022-12-14 08:58:03,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131128 states to 131128 states and 181579 transitions. [2022-12-14 08:58:03,519 INFO L78 Accepts]: Start accepts. Automaton has 131128 states and 181579 transitions. Word has length 121 [2022-12-14 08:58:03,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:58:03,520 INFO L495 AbstractCegarLoop]: Abstraction has 131128 states and 181579 transitions. [2022-12-14 08:58:03,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-12-14 08:58:03,520 INFO L276 IsEmpty]: Start isEmpty. Operand 131128 states and 181579 transitions. [2022-12-14 08:58:03,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-12-14 08:58:03,576 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:58:03,576 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, 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 08:58:03,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 08:58:03,577 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:58:03,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:58:03,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1754588203, now seen corresponding path program 1 times [2022-12-14 08:58:03,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:58:03,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110804814] [2022-12-14 08:58:03,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:58:03,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:58:03,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:58:03,663 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 08:58:03,663 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:58:03,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110804814] [2022-12-14 08:58:03,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110804814] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:58:03,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479556184] [2022-12-14 08:58:03,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:58:03,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:58:03,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1b86aa5-173a-4b96-9f4d-b24d62eecb6f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:58:03,664 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1b86aa5-173a-4b96-9f4d-b24d62eecb6f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:58:03,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1b86aa5-173a-4b96-9f4d-b24d62eecb6f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 08:58:03,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:58:03,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 715 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 08:58:03,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:58:03,837 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:58:03,837 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:58:03,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479556184] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:58:03,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:58:03,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 08:58:03,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196928776] [2022-12-14 08:58:03,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:58:03,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:58:03,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:58:03,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:58:03,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:58:03,839 INFO L87 Difference]: Start difference. First operand 131128 states and 181579 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 08:58:13,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:58:13,620 INFO L93 Difference]: Finished difference Result 252678 states and 353563 transitions. [2022-12-14 08:58:13,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:58:13,621 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 123 [2022-12-14 08:58:13,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:58:14,035 INFO L225 Difference]: With dead ends: 252678 [2022-12-14 08:58:14,035 INFO L226 Difference]: Without dead ends: 164706 [2022-12-14 08:58:14,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:58:14,171 INFO L413 NwaCegarLoop]: 270 mSDtfsCounter, 111 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:58:14,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 433 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:58:14,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164706 states. [2022-12-14 08:58:23,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164706 to 147316. [2022-12-14 08:58:23,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147316 states, 125561 states have (on average 1.414762545694921) internal successors, (177639), 125220 states have internal predecessors, (177639), 13642 states have call successors, (13642), 7752 states have call predecessors, (13642), 8112 states have return successors, (14644), 14344 states have call predecessors, (14644), 13642 states have call successors, (14644) [2022-12-14 08:58:23,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147316 states to 147316 states and 205925 transitions. [2022-12-14 08:58:23,775 INFO L78 Accepts]: Start accepts. Automaton has 147316 states and 205925 transitions. Word has length 123 [2022-12-14 08:58:23,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:58:23,775 INFO L495 AbstractCegarLoop]: Abstraction has 147316 states and 205925 transitions. [2022-12-14 08:58:23,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 08:58:23,775 INFO L276 IsEmpty]: Start isEmpty. Operand 147316 states and 205925 transitions. [2022-12-14 08:58:23,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-12-14 08:58:23,828 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:58:23,828 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, 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 08:58:23,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1b86aa5-173a-4b96-9f4d-b24d62eecb6f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 08:58:24,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1b86aa5-173a-4b96-9f4d-b24d62eecb6f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:58:24,030 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:58:24,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:58:24,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1494136204, now seen corresponding path program 1 times [2022-12-14 08:58:24,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:58:24,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174222628] [2022-12-14 08:58:24,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:58:24,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:58:24,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:58:24,128 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 08:58:24,129 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:58:24,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174222628] [2022-12-14 08:58:24,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174222628] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:58:24,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293208171] [2022-12-14 08:58:24,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:58:24,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:58:24,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1b86aa5-173a-4b96-9f4d-b24d62eecb6f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:58:24,130 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1b86aa5-173a-4b96-9f4d-b24d62eecb6f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:58:24,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1b86aa5-173a-4b96-9f4d-b24d62eecb6f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 08:58:24,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:58:24,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 718 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 08:58:24,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:58:24,281 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:58:24,281 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:58:24,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293208171] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:58:24,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:58:24,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 08:58:24,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200054958] [2022-12-14 08:58:24,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:58:24,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:58:24,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:58:24,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:58:24,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:58:24,283 INFO L87 Difference]: Start difference. First operand 147316 states and 205925 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 08:58:35,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:58:35,279 INFO L93 Difference]: Finished difference Result 282246 states and 398079 transitions. [2022-12-14 08:58:35,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:58:35,281 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 123 [2022-12-14 08:58:35,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:58:35,765 INFO L225 Difference]: With dead ends: 282246 [2022-12-14 08:58:35,766 INFO L226 Difference]: Without dead ends: 183914 [2022-12-14 08:58:35,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:58:35,932 INFO L413 NwaCegarLoop]: 265 mSDtfsCounter, 105 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:58:35,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 428 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:58:36,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183914 states. [2022-12-14 08:58:46,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183914 to 168328. [2022-12-14 08:58:46,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168328 states, 145149 states have (on average 1.4317218857863299) internal successors, (207813), 144808 states have internal predecessors, (207813), 14354 states have call successors, (14354), 8464 states have call predecessors, (14354), 8824 states have return successors, (15356), 15056 states have call predecessors, (15356), 14354 states have call successors, (15356) [2022-12-14 08:58:46,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168328 states to 168328 states and 237523 transitions. [2022-12-14 08:58:46,791 INFO L78 Accepts]: Start accepts. Automaton has 168328 states and 237523 transitions. Word has length 123 [2022-12-14 08:58:46,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:58:46,791 INFO L495 AbstractCegarLoop]: Abstraction has 168328 states and 237523 transitions. [2022-12-14 08:58:46,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 08:58:46,792 INFO L276 IsEmpty]: Start isEmpty. Operand 168328 states and 237523 transitions. [2022-12-14 08:58:46,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-12-14 08:58:46,832 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:58:46,832 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, 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] [2022-12-14 08:58:46,837 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1b86aa5-173a-4b96-9f4d-b24d62eecb6f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 08:58:47,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1b86aa5-173a-4b96-9f4d-b24d62eecb6f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 08:58:47,033 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:58:47,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:58:47,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1547540668, now seen corresponding path program 1 times [2022-12-14 08:58:47,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:58:47,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243099877] [2022-12-14 08:58:47,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:58:47,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:58:47,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:58:47,082 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 08:58:47,083 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:58:47,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243099877] [2022-12-14 08:58:47,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243099877] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:58:47,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:58:47,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:58:47,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18285827] [2022-12-14 08:58:47,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:58:47,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:58:47,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:58:47,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:58:47,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:58:47,084 INFO L87 Difference]: Start difference. First operand 168328 states and 237523 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 08:59:04,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:59:04,295 INFO L93 Difference]: Finished difference Result 455408 states and 646501 transitions. [2022-12-14 08:59:04,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:59:04,296 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 122 [2022-12-14 08:59:04,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:59:05,165 INFO L225 Difference]: With dead ends: 455408 [2022-12-14 08:59:05,165 INFO L226 Difference]: Without dead ends: 287086 [2022-12-14 08:59:05,379 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 08:59:05,380 INFO L413 NwaCegarLoop]: 223 mSDtfsCounter, 104 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:59:05,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 382 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:59:05,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287086 states. [2022-12-14 08:59:20,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287086 to 245912. [2022-12-14 08:59:20,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245912 states, 217033 states have (on average 1.4486322356507997) internal successors, (314401), 216693 states have internal predecessors, (314401), 17204 states have call successors, (17204), 11314 states have call predecessors, (17204), 11674 states have return successors, (18206), 17905 states have call predecessors, (18206), 17204 states have call successors, (18206) [2022-12-14 08:59:20,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245912 states to 245912 states and 349811 transitions. [2022-12-14 08:59:20,870 INFO L78 Accepts]: Start accepts. Automaton has 245912 states and 349811 transitions. Word has length 122 [2022-12-14 08:59:20,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:59:20,871 INFO L495 AbstractCegarLoop]: Abstraction has 245912 states and 349811 transitions. [2022-12-14 08:59:20,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 08:59:20,871 INFO L276 IsEmpty]: Start isEmpty. Operand 245912 states and 349811 transitions. [2022-12-14 08:59:20,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-12-14 08:59:20,921 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:59:20,921 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:59:20,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-14 08:59:20,921 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:59:20,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:59:20,922 INFO L85 PathProgramCache]: Analyzing trace with hash -621083393, now seen corresponding path program 1 times [2022-12-14 08:59:20,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:59:20,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86970741] [2022-12-14 08:59:20,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:59:20,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:59:20,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:59:20,966 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 08:59:20,967 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:59:20,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86970741] [2022-12-14 08:59:20,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86970741] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:59:20,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:59:20,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:59:20,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525022404] [2022-12-14 08:59:20,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:59:20,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:59:20,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:59:20,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:59:20,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:59:20,968 INFO L87 Difference]: Start difference. First operand 245912 states and 349811 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-12-14 08:59:48,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:59:48,678 INFO L93 Difference]: Finished difference Result 731013 states and 1043532 transitions. [2022-12-14 08:59:48,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:59:48,679 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 123 [2022-12-14 08:59:48,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:59:50,239 INFO L225 Difference]: With dead ends: 731013 [2022-12-14 08:59:50,240 INFO L226 Difference]: Without dead ends: 485106 [2022-12-14 08:59:50,678 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 08:59:50,679 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 148 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:59:50,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 316 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:59:51,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485106 states. [2022-12-14 09:00:19,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485106 to 475974. [2022-12-14 09:00:20,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475974 states, 419925 states have (on average 1.4382687384652022) internal successors, (603965), 419351 states have internal predecessors, (603965), 33078 states have call successors, (33078), 22274 states have call predecessors, (33078), 22970 states have return successors, (34878), 34349 states have call predecessors, (34878), 33078 states have call successors, (34878) [2022-12-14 09:00:21,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475974 states to 475974 states and 671921 transitions. [2022-12-14 09:00:21,411 INFO L78 Accepts]: Start accepts. Automaton has 475974 states and 671921 transitions. Word has length 123 [2022-12-14 09:00:21,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:00:21,411 INFO L495 AbstractCegarLoop]: Abstraction has 475974 states and 671921 transitions. [2022-12-14 09:00:21,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-12-14 09:00:21,412 INFO L276 IsEmpty]: Start isEmpty. Operand 475974 states and 671921 transitions. [2022-12-14 09:00:21,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-12-14 09:00:21,509 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:00:21,509 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, 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 09:00:21,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-14 09:00:21,510 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:00:21,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:00:21,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1903515995, now seen corresponding path program 1 times [2022-12-14 09:00:21,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:00:21,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801121202] [2022-12-14 09:00:21,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:00:21,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:00:21,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:00:21,684 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 18 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 09:00:21,685 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:00:21,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801121202] [2022-12-14 09:00:21,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801121202] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:00:21,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222660185] [2022-12-14 09:00:21,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:00:21,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:00:21,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1b86aa5-173a-4b96-9f4d-b24d62eecb6f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:00:21,686 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1b86aa5-173a-4b96-9f4d-b24d62eecb6f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:00:21,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1b86aa5-173a-4b96-9f4d-b24d62eecb6f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 09:00:21,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:00:21,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 718 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 09:00:21,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:00:21,810 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:00:21,810 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:00:21,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222660185] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:00:21,810 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:00:21,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 09:00:21,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160030533] [2022-12-14 09:00:21,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:00:21,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:00:21,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:00:21,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:00:21,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:00:21,812 INFO L87 Difference]: Start difference. First operand 475974 states and 671921 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 09:00:56,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:00:56,803 INFO L93 Difference]: Finished difference Result 924358 states and 1311359 transitions. [2022-12-14 09:00:56,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:00:56,804 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 123 [2022-12-14 09:00:56,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:00:58,419 INFO L225 Difference]: With dead ends: 924358 [2022-12-14 09:00:58,419 INFO L226 Difference]: Without dead ends: 601666 [2022-12-14 09:00:58,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:00:58,851 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 93 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:00:58,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 418 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:00:59,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601666 states. [2022-12-14 09:01:33,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601666 to 578598. [2022-12-14 09:01:33,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578598 states, 514869 states have (on average 1.4448354824236844) internal successors, (743901), 514295 states have internal predecessors, (743901), 36918 states have call successors, (36918), 26114 states have call predecessors, (36918), 26810 states have return successors, (38718), 38189 states have call predecessors, (38718), 36918 states have call successors, (38718) [2022-12-14 09:01:35,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578598 states to 578598 states and 819537 transitions. [2022-12-14 09:01:35,418 INFO L78 Accepts]: Start accepts. Automaton has 578598 states and 819537 transitions. Word has length 123 [2022-12-14 09:01:35,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:01:35,418 INFO L495 AbstractCegarLoop]: Abstraction has 578598 states and 819537 transitions. [2022-12-14 09:01:35,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 09:01:35,419 INFO L276 IsEmpty]: Start isEmpty. Operand 578598 states and 819537 transitions. [2022-12-14 09:01:35,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-12-14 09:01:35,516 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:01:35,516 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, 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 09:01:35,522 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1b86aa5-173a-4b96-9f4d-b24d62eecb6f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 09:01:35,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1b86aa5-173a-4b96-9f4d-b24d62eecb6f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 09:01:35,718 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:01:35,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:01:35,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1034612693, now seen corresponding path program 1 times [2022-12-14 09:01:35,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:01:35,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883541636] [2022-12-14 09:01:35,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:01:35,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:01:35,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:01:35,792 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 09:01:35,792 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:01:35,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883541636] [2022-12-14 09:01:35,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883541636] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:01:35,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023990737] [2022-12-14 09:01:35,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:01:35,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:01:35,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1b86aa5-173a-4b96-9f4d-b24d62eecb6f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:01:35,794 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1b86aa5-173a-4b96-9f4d-b24d62eecb6f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:01:35,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1b86aa5-173a-4b96-9f4d-b24d62eecb6f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 09:01:36,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:01:36,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 718 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 09:01:36,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:01:36,089 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:01:36,089 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:01:36,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023990737] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:01:36,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:01:36,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 09:01:36,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019238012] [2022-12-14 09:01:36,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:01:36,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:01:36,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:01:36,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:01:36,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:01:36,091 INFO L87 Difference]: Start difference. First operand 578598 states and 819537 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 09:02:16,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:02:16,448 INFO L93 Difference]: Finished difference Result 1123438 states and 1597351 transitions. [2022-12-14 09:02:16,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:02:16,449 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 123 [2022-12-14 09:02:16,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:02:18,450 INFO L225 Difference]: With dead ends: 1123438 [2022-12-14 09:02:18,451 INFO L226 Difference]: Without dead ends: 729514 [2022-12-14 09:02:18,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:02:18,920 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 87 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:02:18,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 413 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:02:19,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729514 states. [2022-12-14 09:02:58,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729514 to 710118. [2022-12-14 09:02:59,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710118 states, 636405 states have (on average 1.4480794462645643) internal successors, (921565), 635831 states have internal predecessors, (921565), 41910 states have call successors, (41910), 31106 states have call predecessors, (41910), 31802 states have return successors, (43710), 43181 states have call predecessors, (43710), 41910 states have call successors, (43710) [2022-12-14 09:03:01,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710118 states to 710118 states and 1007185 transitions. [2022-12-14 09:03:01,195 INFO L78 Accepts]: Start accepts. Automaton has 710118 states and 1007185 transitions. Word has length 123 [2022-12-14 09:03:01,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:03:01,195 INFO L495 AbstractCegarLoop]: Abstraction has 710118 states and 1007185 transitions. [2022-12-14 09:03:01,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 09:03:01,195 INFO L276 IsEmpty]: Start isEmpty. Operand 710118 states and 1007185 transitions. [2022-12-14 09:03:01,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-12-14 09:03:01,285 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:03:01,285 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, 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] [2022-12-14 09:03:01,290 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1b86aa5-173a-4b96-9f4d-b24d62eecb6f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 09:03:01,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1b86aa5-173a-4b96-9f4d-b24d62eecb6f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:03:01,487 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:03:01,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:03:01,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1036232795, now seen corresponding path program 1 times [2022-12-14 09:03:01,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:03:01,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971469360] [2022-12-14 09:03:01,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:03:01,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:03:01,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:03:01,573 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-12-14 09:03:01,573 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:03:01,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971469360] [2022-12-14 09:03:01,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971469360] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:03:01,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:03:01,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:03:01,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047766645] [2022-12-14 09:03:01,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:03:01,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:03:01,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:03:01,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:03:01,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:03:01,575 INFO L87 Difference]: Start difference. First operand 710118 states and 1007185 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, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-12-14 09:03:59,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:03:59,193 INFO L93 Difference]: Finished difference Result 1782787 states and 2530010 transitions. [2022-12-14 09:03:59,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:03:59,194 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, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 120 [2022-12-14 09:03:59,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:04:02,238 INFO L225 Difference]: With dead ends: 1782787 [2022-12-14 09:04:02,238 INFO L226 Difference]: Without dead ends: 1072674 [2022-12-14 09:04:03,213 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 09:04:03,213 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 151 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:04:03,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 324 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:04:04,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072674 states. [2022-12-14 09:05:08,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072674 to 1062678. [2022-12-14 09:05:09,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1062678 states, 952707 states have (on average 1.4361760751206825) internal successors, (1368255), 951899 states have internal predecessors, (1368255), 62328 states have call successors, (62328), 46610 states have call predecessors, (62328), 47642 states have return successors, (64926), 64169 states have call predecessors, (64926), 62328 states have call successors, (64926) [2022-12-14 09:05:12,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1062678 states to 1062678 states and 1495509 transitions. [2022-12-14 09:05:12,488 INFO L78 Accepts]: Start accepts. Automaton has 1062678 states and 1495509 transitions. Word has length 120 [2022-12-14 09:05:12,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:05:12,489 INFO L495 AbstractCegarLoop]: Abstraction has 1062678 states and 1495509 transitions. [2022-12-14 09:05:12,489 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, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-12-14 09:05:12,489 INFO L276 IsEmpty]: Start isEmpty. Operand 1062678 states and 1495509 transitions. [2022-12-14 09:05:12,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-12-14 09:05:12,797 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:05:12,797 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, 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] [2022-12-14 09:05:12,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-14 09:05:12,798 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:05:12,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:05:12,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1207793384, now seen corresponding path program 1 times [2022-12-14 09:05:12,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:05:12,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123679317] [2022-12-14 09:05:12,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:05:12,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:05:12,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:05:12,908 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 13 proven. 25 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 09:05:12,908 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:05:12,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123679317] [2022-12-14 09:05:12,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123679317] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:05:12,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138007715] [2022-12-14 09:05:12,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:05:12,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:05:12,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1b86aa5-173a-4b96-9f4d-b24d62eecb6f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:05:12,909 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1b86aa5-173a-4b96-9f4d-b24d62eecb6f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:05:12,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1b86aa5-173a-4b96-9f4d-b24d62eecb6f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 09:05:12,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:05:12,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 09:05:12,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:05:13,100 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 09:05:13,101 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:05:13,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138007715] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:05:13,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:05:13,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 6 [2022-12-14 09:05:13,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682982429] [2022-12-14 09:05:13,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:05:13,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 09:05:13,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:05:13,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 09:05:13,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:05:13,102 INFO L87 Difference]: Start difference. First operand 1062678 states and 1495509 transitions. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 5 states have internal predecessors, (99), 3 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 09:06:27,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:06:27,116 INFO L93 Difference]: Finished difference Result 2136581 states and 2995791 transitions. [2022-12-14 09:06:27,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 09:06:27,117 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 5 states have internal predecessors, (99), 3 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 121 [2022-12-14 09:06:27,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:06:30,472 INFO L225 Difference]: With dead ends: 2136581 [2022-12-14 09:06:30,472 INFO L226 Difference]: Without dead ends: 1073909 [2022-12-14 09:06:31,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-12-14 09:06:31,758 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 508 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:06:31,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [523 Valid, 437 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:06:32,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1073909 states.