./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/transmitter.12.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_fe05d910-1e42-419e-a733-533594443cfc/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe05d910-1e42-419e-a733-533594443cfc/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_fe05d910-1e42-419e-a733-533594443cfc/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe05d910-1e42-419e-a733-533594443cfc/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/transmitter.12.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe05d910-1e42-419e-a733-533594443cfc/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_fe05d910-1e42-419e-a733-533594443cfc/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 062c7418109a213aa13d25a99437d8241cca4f6492c123259890838dc94aff90 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 05:59:11,476 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 05:59:11,478 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 05:59:11,497 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 05:59:11,498 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 05:59:11,499 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 05:59:11,500 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 05:59:11,501 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 05:59:11,503 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 05:59:11,504 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 05:59:11,504 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 05:59:11,505 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 05:59:11,506 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 05:59:11,507 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 05:59:11,508 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 05:59:11,509 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 05:59:11,510 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 05:59:11,511 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 05:59:11,512 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 05:59:11,514 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 05:59:11,515 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 05:59:11,517 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 05:59:11,518 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 05:59:11,518 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 05:59:11,522 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 05:59:11,522 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 05:59:11,523 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 05:59:11,523 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 05:59:11,524 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 05:59:11,525 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 05:59:11,525 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 05:59:11,526 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 05:59:11,527 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 05:59:11,527 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 05:59:11,528 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 05:59:11,529 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 05:59:11,529 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 05:59:11,529 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 05:59:11,530 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 05:59:11,530 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 05:59:11,531 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 05:59:11,532 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe05d910-1e42-419e-a733-533594443cfc/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 05:59:11,552 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 05:59:11,552 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 05:59:11,552 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 05:59:11,552 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 05:59:11,559 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 05:59:11,559 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 05:59:11,559 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 05:59:11,560 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 05:59:11,560 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 05:59:11,560 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 05:59:11,560 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 05:59:11,560 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 05:59:11,561 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 05:59:11,561 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 05:59:11,561 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 05:59:11,561 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 05:59:11,561 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 05:59:11,561 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 05:59:11,562 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 05:59:11,562 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 05:59:11,562 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 05:59:11,562 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 05:59:11,562 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 05:59:11,563 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 05:59:11,563 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 05:59:11,563 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 05:59:11,563 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 05:59:11,563 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 05:59:11,564 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 05:59:11,564 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 05:59:11,564 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 05:59:11,564 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 05:59:11,564 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 05:59:11,564 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 05:59:11,565 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 05:59:11,565 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 05:59:11,565 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 05:59:11,565 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 05:59:11,565 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 05:59:11,565 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 05:59:11,565 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 05:59:11,565 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_fe05d910-1e42-419e-a733-533594443cfc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe05d910-1e42-419e-a733-533594443cfc/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 062c7418109a213aa13d25a99437d8241cca4f6492c123259890838dc94aff90 [2022-12-14 05:59:11,742 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 05:59:11,759 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 05:59:11,761 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 05:59:11,762 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 05:59:11,762 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 05:59:11,763 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe05d910-1e42-419e-a733-533594443cfc/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/systemc/transmitter.12.cil.c [2022-12-14 05:59:14,385 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 05:59:14,535 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 05:59:14,536 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe05d910-1e42-419e-a733-533594443cfc/sv-benchmarks/c/systemc/transmitter.12.cil.c [2022-12-14 05:59:14,545 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe05d910-1e42-419e-a733-533594443cfc/bin/utaipan-gh47qXpMRh/data/a4630fc75/9ba0042d482344f2ad7b59d8bbe64040/FLAG2f8b485b9 [2022-12-14 05:59:14,555 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe05d910-1e42-419e-a733-533594443cfc/bin/utaipan-gh47qXpMRh/data/a4630fc75/9ba0042d482344f2ad7b59d8bbe64040 [2022-12-14 05:59:14,557 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 05:59:14,558 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 05:59:14,559 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 05:59:14,559 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 05:59:14,562 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 05:59:14,563 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:59:14" (1/1) ... [2022-12-14 05:59:14,564 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17bfce66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:59:14, skipping insertion in model container [2022-12-14 05:59:14,564 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:59:14" (1/1) ... [2022-12-14 05:59:14,569 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 05:59:14,613 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 05:59:14,725 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_fe05d910-1e42-419e-a733-533594443cfc/sv-benchmarks/c/systemc/transmitter.12.cil.c[706,719] [2022-12-14 05:59:14,808 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 05:59:14,818 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 05:59:14,826 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_fe05d910-1e42-419e-a733-533594443cfc/sv-benchmarks/c/systemc/transmitter.12.cil.c[706,719] [2022-12-14 05:59:14,866 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 05:59:14,879 INFO L208 MainTranslator]: Completed translation [2022-12-14 05:59:14,879 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:59:14 WrapperNode [2022-12-14 05:59:14,879 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 05:59:14,880 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 05:59:14,880 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 05:59:14,880 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 05:59:14,885 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:59:14" (1/1) ... [2022-12-14 05:59:14,894 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:59:14" (1/1) ... [2022-12-14 05:59:14,921 INFO L138 Inliner]: procedures = 52, calls = 66, calls flagged for inlining = 36, calls inlined = 36, statements flattened = 834 [2022-12-14 05:59:14,921 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 05:59:14,922 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 05:59:14,922 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 05:59:14,922 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 05:59:14,929 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:59:14" (1/1) ... [2022-12-14 05:59:14,929 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:59:14" (1/1) ... [2022-12-14 05:59:14,931 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:59:14" (1/1) ... [2022-12-14 05:59:14,931 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:59:14" (1/1) ... [2022-12-14 05:59:14,938 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:59:14" (1/1) ... [2022-12-14 05:59:14,946 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:59:14" (1/1) ... [2022-12-14 05:59:14,948 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:59:14" (1/1) ... [2022-12-14 05:59:14,950 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:59:14" (1/1) ... [2022-12-14 05:59:14,953 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 05:59:14,954 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 05:59:14,954 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 05:59:14,954 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 05:59:14,955 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:59:14" (1/1) ... [2022-12-14 05:59:14,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 05:59:14,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe05d910-1e42-419e-a733-533594443cfc/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:59:14,981 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe05d910-1e42-419e-a733-533594443cfc/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 05:59:14,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe05d910-1e42-419e-a733-533594443cfc/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 05:59:15,014 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 05:59:15,014 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-12-14 05:59:15,014 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-12-14 05:59:15,014 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-12-14 05:59:15,014 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-12-14 05:59:15,015 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-12-14 05:59:15,015 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-12-14 05:59:15,015 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-12-14 05:59:15,015 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-12-14 05:59:15,015 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-12-14 05:59:15,015 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-12-14 05:59:15,015 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-12-14 05:59:15,016 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-12-14 05:59:15,016 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 05:59:15,016 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 05:59:15,016 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 05:59:15,099 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 05:59:15,100 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 05:59:15,656 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 05:59:16,029 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 05:59:16,029 INFO L300 CfgBuilder]: Removed 16 assume(true) statements. [2022-12-14 05:59:16,031 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:59:16 BoogieIcfgContainer [2022-12-14 05:59:16,031 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 05:59:16,033 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 05:59:16,033 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 05:59:16,035 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 05:59:16,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 05:59:14" (1/3) ... [2022-12-14 05:59:16,036 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1281605b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:59:16, skipping insertion in model container [2022-12-14 05:59:16,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:59:14" (2/3) ... [2022-12-14 05:59:16,036 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1281605b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:59:16, skipping insertion in model container [2022-12-14 05:59:16,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:59:16" (3/3) ... [2022-12-14 05:59:16,037 INFO L112 eAbstractionObserver]: Analyzing ICFG transmitter.12.cil.c [2022-12-14 05:59:16,052 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 05:59:16,052 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 05:59:16,090 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 05:59:16,095 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;@17eb0b2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 05:59:16,095 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 05:59:16,099 INFO L276 IsEmpty]: Start isEmpty. Operand has 186 states, 153 states have (on average 1.5620915032679739) internal successors, (239), 155 states have internal predecessors, (239), 25 states have call successors, (25), 6 states have call predecessors, (25), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-12-14 05:59:16,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-12-14 05:59:16,107 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:59:16,108 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:59:16,108 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:59:16,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:59:16,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1358525136, now seen corresponding path program 1 times [2022-12-14 05:59:16,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:59:16,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293095533] [2022-12-14 05:59:16,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:59:16,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:59:16,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:59:16,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:59:16,451 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:59:16,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293095533] [2022-12-14 05:59:16,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293095533] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:59:16,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:59:16,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 05:59:16,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946875455] [2022-12-14 05:59:16,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:59:16,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:59:16,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:59:16,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:59:16,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:59:16,479 INFO L87 Difference]: Start difference. First operand has 186 states, 153 states have (on average 1.5620915032679739) internal successors, (239), 155 states have internal predecessors, (239), 25 states have call successors, (25), 6 states have call predecessors, (25), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 05:59:16,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:59:16,838 INFO L93 Difference]: Finished difference Result 541 states and 869 transitions. [2022-12-14 05:59:16,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 05:59:16,841 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (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 77 [2022-12-14 05:59:16,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:59:16,851 INFO L225 Difference]: With dead ends: 541 [2022-12-14 05:59:16,851 INFO L226 Difference]: Without dead ends: 356 [2022-12-14 05:59:16,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:59:16,859 INFO L413 NwaCegarLoop]: 444 mSDtfsCounter, 499 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 499 SdHoareTripleChecker+Valid, 798 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 05:59:16,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [499 Valid, 798 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 05:59:16,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2022-12-14 05:59:16,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 353. [2022-12-14 05:59:16,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 295 states have (on average 1.5186440677966102) internal successors, (448), 296 states have internal predecessors, (448), 45 states have call successors, (45), 12 states have call predecessors, (45), 12 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2022-12-14 05:59:16,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 538 transitions. [2022-12-14 05:59:16,931 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 538 transitions. Word has length 77 [2022-12-14 05:59:16,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:59:16,931 INFO L495 AbstractCegarLoop]: Abstraction has 353 states and 538 transitions. [2022-12-14 05:59:16,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 05:59:16,932 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 538 transitions. [2022-12-14 05:59:16,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-12-14 05:59:16,935 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:59:16,935 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:59:16,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 05:59:16,936 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:59:16,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:59:16,937 INFO L85 PathProgramCache]: Analyzing trace with hash -798947887, now seen corresponding path program 1 times [2022-12-14 05:59:16,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:59:16,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796498771] [2022-12-14 05:59:16,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:59:16,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:59:16,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:59:17,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:59:17,116 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:59:17,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796498771] [2022-12-14 05:59:17,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796498771] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:59:17,116 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:59:17,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 05:59:17,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041665670] [2022-12-14 05:59:17,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:59:17,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 05:59:17,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:59:17,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 05:59:17,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:59:17,119 INFO L87 Difference]: Start difference. First operand 353 states and 538 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 05:59:17,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:59:17,695 INFO L93 Difference]: Finished difference Result 1210 states and 1867 transitions. [2022-12-14 05:59:17,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 05:59:17,695 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 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 77 [2022-12-14 05:59:17,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:59:17,703 INFO L225 Difference]: With dead ends: 1210 [2022-12-14 05:59:17,703 INFO L226 Difference]: Without dead ends: 836 [2022-12-14 05:59:17,704 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 05:59:17,705 INFO L413 NwaCegarLoop]: 475 mSDtfsCounter, 1060 mSDsluCounter, 798 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1073 SdHoareTripleChecker+Valid, 1273 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 05:59:17,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1073 Valid, 1273 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 05:59:17,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2022-12-14 05:59:17,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 824. [2022-12-14 05:59:17,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 707 states have (on average 1.5091937765205092) internal successors, (1067), 697 states have internal predecessors, (1067), 88 states have call successors, (88), 26 states have call predecessors, (88), 28 states have return successors, (101), 101 states have call predecessors, (101), 88 states have call successors, (101) [2022-12-14 05:59:17,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 1256 transitions. [2022-12-14 05:59:17,766 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 1256 transitions. Word has length 77 [2022-12-14 05:59:17,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:59:17,766 INFO L495 AbstractCegarLoop]: Abstraction has 824 states and 1256 transitions. [2022-12-14 05:59:17,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 05:59:17,767 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 1256 transitions. [2022-12-14 05:59:17,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-12-14 05:59:17,769 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:59:17,770 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:59:17,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 05:59:17,770 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:59:17,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:59:17,771 INFO L85 PathProgramCache]: Analyzing trace with hash 229584274, now seen corresponding path program 1 times [2022-12-14 05:59:17,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:59:17,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352433102] [2022-12-14 05:59:17,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:59:17,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:59:17,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:59:17,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:59:17,902 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:59:17,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352433102] [2022-12-14 05:59:17,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352433102] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:59:17,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:59:17,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 05:59:17,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050287620] [2022-12-14 05:59:17,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:59:17,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 05:59:17,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:59:17,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 05:59:17,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:59:17,904 INFO L87 Difference]: Start difference. First operand 824 states and 1256 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 05:59:18,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:59:18,452 INFO L93 Difference]: Finished difference Result 2895 states and 4475 transitions. [2022-12-14 05:59:18,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 05:59:18,453 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 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 77 [2022-12-14 05:59:18,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:59:18,463 INFO L225 Difference]: With dead ends: 2895 [2022-12-14 05:59:18,463 INFO L226 Difference]: Without dead ends: 2027 [2022-12-14 05:59:18,467 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 05:59:18,468 INFO L413 NwaCegarLoop]: 475 mSDtfsCounter, 1060 mSDsluCounter, 774 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1073 SdHoareTripleChecker+Valid, 1249 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 05:59:18,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1073 Valid, 1249 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 05:59:18,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2027 states. [2022-12-14 05:59:18,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2027 to 1575. [2022-12-14 05:59:18,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1575 states, 1354 states have (on average 1.5103397341211227) internal successors, (2045), 1345 states have internal predecessors, (2045), 164 states have call successors, (164), 50 states have call predecessors, (164), 56 states have return successors, (202), 180 states have call predecessors, (202), 164 states have call successors, (202) [2022-12-14 05:59:18,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1575 states to 1575 states and 2411 transitions. [2022-12-14 05:59:18,564 INFO L78 Accepts]: Start accepts. Automaton has 1575 states and 2411 transitions. Word has length 77 [2022-12-14 05:59:18,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:59:18,564 INFO L495 AbstractCegarLoop]: Abstraction has 1575 states and 2411 transitions. [2022-12-14 05:59:18,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 05:59:18,565 INFO L276 IsEmpty]: Start isEmpty. Operand 1575 states and 2411 transitions. [2022-12-14 05:59:18,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-12-14 05:59:18,567 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:59:18,567 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:59:18,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 05:59:18,567 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:59:18,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:59:18,568 INFO L85 PathProgramCache]: Analyzing trace with hash -912063119, now seen corresponding path program 1 times [2022-12-14 05:59:18,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:59:18,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434466328] [2022-12-14 05:59:18,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:59:18,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:59:18,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:59:18,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:59:18,659 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:59:18,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434466328] [2022-12-14 05:59:18,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434466328] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:59:18,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:59:18,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 05:59:18,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82986215] [2022-12-14 05:59:18,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:59:18,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 05:59:18,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:59:18,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 05:59:18,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:59:18,661 INFO L87 Difference]: Start difference. First operand 1575 states and 2411 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 05:59:19,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:59:19,302 INFO L93 Difference]: Finished difference Result 5466 states and 8512 transitions. [2022-12-14 05:59:19,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 05:59:19,303 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 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 77 [2022-12-14 05:59:19,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:59:19,316 INFO L225 Difference]: With dead ends: 5466 [2022-12-14 05:59:19,316 INFO L226 Difference]: Without dead ends: 3802 [2022-12-14 05:59:19,321 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 05:59:19,322 INFO L413 NwaCegarLoop]: 469 mSDtfsCounter, 1060 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1073 SdHoareTripleChecker+Valid, 1050 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 05:59:19,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1073 Valid, 1050 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 05:59:19,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3802 states. [2022-12-14 05:59:19,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3802 to 3051. [2022-12-14 05:59:19,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3051 states, 2626 states have (on average 1.50990099009901) internal successors, (3965), 2621 states have internal predecessors, (3965), 312 states have call successors, (312), 98 states have call predecessors, (312), 112 states have return successors, (398), 332 states have call predecessors, (398), 312 states have call successors, (398) [2022-12-14 05:59:19,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3051 states to 3051 states and 4675 transitions. [2022-12-14 05:59:19,444 INFO L78 Accepts]: Start accepts. Automaton has 3051 states and 4675 transitions. Word has length 77 [2022-12-14 05:59:19,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:59:19,445 INFO L495 AbstractCegarLoop]: Abstraction has 3051 states and 4675 transitions. [2022-12-14 05:59:19,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 05:59:19,445 INFO L276 IsEmpty]: Start isEmpty. Operand 3051 states and 4675 transitions. [2022-12-14 05:59:19,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-12-14 05:59:19,446 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:59:19,446 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:59:19,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 05:59:19,446 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:59:19,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:59:19,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1613631344, now seen corresponding path program 1 times [2022-12-14 05:59:19,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:59:19,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183920654] [2022-12-14 05:59:19,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:59:19,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:59:19,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:59:19,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:59:19,504 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:59:19,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183920654] [2022-12-14 05:59:19,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183920654] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:59:19,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:59:19,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 05:59:19,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866983480] [2022-12-14 05:59:19,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:59:19,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:59:19,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:59:19,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:59:19,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:59:19,506 INFO L87 Difference]: Start difference. First operand 3051 states and 4675 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 05:59:19,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:59:19,984 INFO L93 Difference]: Finished difference Result 9086 states and 14177 transitions. [2022-12-14 05:59:19,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 05:59:19,985 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (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 77 [2022-12-14 05:59:19,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:59:20,006 INFO L225 Difference]: With dead ends: 9086 [2022-12-14 05:59:20,006 INFO L226 Difference]: Without dead ends: 6040 [2022-12-14 05:59:20,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:59:20,016 INFO L413 NwaCegarLoop]: 443 mSDtfsCounter, 520 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 520 SdHoareTripleChecker+Valid, 796 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:59:20,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [520 Valid, 796 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 05:59:20,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6040 states. [2022-12-14 05:59:20,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6040 to 6020. [2022-12-14 05:59:20,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6020 states, 5191 states have (on average 1.5006742438836447) internal successors, (7790), 5181 states have internal predecessors, (7790), 604 states have call successors, (604), 196 states have call predecessors, (604), 224 states have return successors, (769), 643 states have call predecessors, (769), 604 states have call successors, (769) [2022-12-14 05:59:20,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6020 states to 6020 states and 9163 transitions. [2022-12-14 05:59:20,264 INFO L78 Accepts]: Start accepts. Automaton has 6020 states and 9163 transitions. Word has length 77 [2022-12-14 05:59:20,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:59:20,264 INFO L495 AbstractCegarLoop]: Abstraction has 6020 states and 9163 transitions. [2022-12-14 05:59:20,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 05:59:20,264 INFO L276 IsEmpty]: Start isEmpty. Operand 6020 states and 9163 transitions. [2022-12-14 05:59:20,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-12-14 05:59:20,265 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:59:20,266 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:59:20,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 05:59:20,266 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:59:20,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:59:20,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1373331183, now seen corresponding path program 1 times [2022-12-14 05:59:20,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:59:20,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730726134] [2022-12-14 05:59:20,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:59:20,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:59:20,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:59:20,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:59:20,329 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:59:20,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730726134] [2022-12-14 05:59:20,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730726134] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:59:20,330 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:59:20,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 05:59:20,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910646638] [2022-12-14 05:59:20,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:59:20,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:59:20,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:59:20,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:59:20,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:59:20,332 INFO L87 Difference]: Start difference. First operand 6020 states and 9163 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 05:59:20,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:59:20,979 INFO L93 Difference]: Finished difference Result 17937 states and 27787 transitions. [2022-12-14 05:59:20,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 05:59:20,979 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (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 77 [2022-12-14 05:59:20,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:59:21,017 INFO L225 Difference]: With dead ends: 17937 [2022-12-14 05:59:21,017 INFO L226 Difference]: Without dead ends: 11922 [2022-12-14 05:59:21,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:59:21,031 INFO L413 NwaCegarLoop]: 443 mSDtfsCounter, 526 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 796 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:59:21,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [526 Valid, 796 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 05:59:21,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11922 states. [2022-12-14 05:59:21,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11922 to 11884. [2022-12-14 05:59:21,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11884 states, 10263 states have (on average 1.491084478222742) internal successors, (15303), 10244 states have internal predecessors, (15303), 1172 states have call successors, (1172), 392 states have call predecessors, (1172), 448 states have return successors, (1488), 1248 states have call predecessors, (1488), 1172 states have call successors, (1488) [2022-12-14 05:59:21,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11884 states to 11884 states and 17963 transitions. [2022-12-14 05:59:21,529 INFO L78 Accepts]: Start accepts. Automaton has 11884 states and 17963 transitions. Word has length 77 [2022-12-14 05:59:21,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:59:21,529 INFO L495 AbstractCegarLoop]: Abstraction has 11884 states and 17963 transitions. [2022-12-14 05:59:21,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 05:59:21,529 INFO L276 IsEmpty]: Start isEmpty. Operand 11884 states and 17963 transitions. [2022-12-14 05:59:21,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-12-14 05:59:21,530 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:59:21,531 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:59:21,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 05:59:21,531 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:59:21,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:59:21,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1773322382, now seen corresponding path program 1 times [2022-12-14 05:59:21,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:59:21,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148211695] [2022-12-14 05:59:21,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:59:21,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:59:21,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:59:21,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:59:21,585 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:59:21,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148211695] [2022-12-14 05:59:21,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148211695] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:59:21,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:59:21,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 05:59:21,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227023101] [2022-12-14 05:59:21,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:59:21,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:59:21,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:59:21,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:59:21,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:59:21,587 INFO L87 Difference]: Start difference. First operand 11884 states and 17963 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 05:59:22,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:59:22,840 INFO L93 Difference]: Finished difference Result 35417 states and 54456 transitions. [2022-12-14 05:59:22,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 05:59:22,841 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (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 77 [2022-12-14 05:59:22,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:59:22,905 INFO L225 Difference]: With dead ends: 35417 [2022-12-14 05:59:22,905 INFO L226 Difference]: Without dead ends: 23538 [2022-12-14 05:59:22,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:59:22,932 INFO L413 NwaCegarLoop]: 443 mSDtfsCounter, 532 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 796 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 05:59:22,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [532 Valid, 796 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 05:59:22,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23538 states. [2022-12-14 05:59:23,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23538 to 23464. [2022-12-14 05:59:23,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23464 states, 20291 states have (on average 1.4811985609383471) internal successors, (30055), 20256 states have internal predecessors, (30055), 2276 states have call successors, (2276), 784 states have call predecessors, (2276), 896 states have return successors, (2880), 2424 states have call predecessors, (2880), 2276 states have call successors, (2880) [2022-12-14 05:59:23,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23464 states to 23464 states and 35211 transitions. [2022-12-14 05:59:23,806 INFO L78 Accepts]: Start accepts. Automaton has 23464 states and 35211 transitions. Word has length 77 [2022-12-14 05:59:23,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:59:23,806 INFO L495 AbstractCegarLoop]: Abstraction has 23464 states and 35211 transitions. [2022-12-14 05:59:23,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 05:59:23,807 INFO L276 IsEmpty]: Start isEmpty. Operand 23464 states and 35211 transitions. [2022-12-14 05:59:23,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-12-14 05:59:23,808 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:59:23,808 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:59:23,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 05:59:23,808 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:59:23,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:59:23,808 INFO L85 PathProgramCache]: Analyzing trace with hash 144672109, now seen corresponding path program 1 times [2022-12-14 05:59:23,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:59:23,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115718472] [2022-12-14 05:59:23,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:59:23,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:59:23,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:59:23,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:59:23,859 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:59:23,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115718472] [2022-12-14 05:59:23,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115718472] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:59:23,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:59:23,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 05:59:23,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821145602] [2022-12-14 05:59:23,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:59:23,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:59:23,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:59:23,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:59:23,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:59:23,860 INFO L87 Difference]: Start difference. First operand 23464 states and 35211 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 05:59:25,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:59:25,754 INFO L93 Difference]: Finished difference Result 70195 states and 107323 transitions. [2022-12-14 05:59:25,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 05:59:25,755 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (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 77 [2022-12-14 05:59:25,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:59:25,880 INFO L225 Difference]: With dead ends: 70195 [2022-12-14 05:59:25,881 INFO L226 Difference]: Without dead ends: 46736 [2022-12-14 05:59:25,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:59:25,926 INFO L413 NwaCegarLoop]: 445 mSDtfsCounter, 537 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 798 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 05:59:25,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [537 Valid, 798 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 05:59:25,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46736 states. [2022-12-14 05:59:27,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46736 to 46600. [2022-12-14 05:59:27,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46600 states, 40259 states have (on average 1.4691621749174097) internal successors, (59147), 40188 states have internal predecessors, (59147), 4548 states have call successors, (4548), 1568 states have call predecessors, (4548), 1792 states have return successors, (5756), 4844 states have call predecessors, (5756), 4548 states have call successors, (5756) [2022-12-14 05:59:27,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46600 states to 46600 states and 69451 transitions. [2022-12-14 05:59:27,875 INFO L78 Accepts]: Start accepts. Automaton has 46600 states and 69451 transitions. Word has length 77 [2022-12-14 05:59:27,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:59:27,875 INFO L495 AbstractCegarLoop]: Abstraction has 46600 states and 69451 transitions. [2022-12-14 05:59:27,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 05:59:27,875 INFO L276 IsEmpty]: Start isEmpty. Operand 46600 states and 69451 transitions. [2022-12-14 05:59:27,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-12-14 05:59:27,896 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:59:27,896 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:59:27,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 05:59:27,896 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:59:27,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:59:27,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1290944047, now seen corresponding path program 1 times [2022-12-14 05:59:27,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:59:27,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245549244] [2022-12-14 05:59:27,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:59:27,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:59:27,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:59:28,113 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 05:59:28,113 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:59:28,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245549244] [2022-12-14 05:59:28,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245549244] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:59:28,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:59:28,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 05:59:28,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98827441] [2022-12-14 05:59:28,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:59:28,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 05:59:28,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:59:28,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 05:59:28,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 05:59:28,116 INFO L87 Difference]: Start difference. First operand 46600 states and 69451 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 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 05:59:31,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:59:31,792 INFO L93 Difference]: Finished difference Result 146876 states and 218517 transitions. [2022-12-14 05:59:31,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 05:59:31,792 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 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 99 [2022-12-14 05:59:31,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:59:32,151 INFO L225 Difference]: With dead ends: 146876 [2022-12-14 05:59:32,151 INFO L226 Difference]: Without dead ends: 100282 [2022-12-14 05:59:32,214 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 05:59:32,215 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 1020 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1027 SdHoareTripleChecker+Valid, 899 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 05:59:32,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1027 Valid, 899 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 05:59:32,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100282 states. [2022-12-14 05:59:35,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100282 to 79128. [2022-12-14 05:59:36,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79128 states, 69139 states have (on average 1.4545046934436425) internal successors, (100563), 68996 states have internal predecessors, (100563), 6916 states have call successors, (6916), 2624 states have call predecessors, (6916), 3072 states have return successors, (9332), 7508 states have call predecessors, (9332), 6916 states have call successors, (9332) [2022-12-14 05:59:36,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79128 states to 79128 states and 116811 transitions. [2022-12-14 05:59:36,253 INFO L78 Accepts]: Start accepts. Automaton has 79128 states and 116811 transitions. Word has length 99 [2022-12-14 05:59:36,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:59:36,253 INFO L495 AbstractCegarLoop]: Abstraction has 79128 states and 116811 transitions. [2022-12-14 05:59:36,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 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 05:59:36,254 INFO L276 IsEmpty]: Start isEmpty. Operand 79128 states and 116811 transitions. [2022-12-14 05:59:36,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-12-14 05:59:36,268 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:59:36,268 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:59:36,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 05:59:36,269 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:59:36,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:59:36,269 INFO L85 PathProgramCache]: Analyzing trace with hash 482310861, now seen corresponding path program 1 times [2022-12-14 05:59:36,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:59:36,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500888536] [2022-12-14 05:59:36,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:59:36,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:59:36,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:59:36,428 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 05:59:36,429 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:59:36,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500888536] [2022-12-14 05:59:36,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500888536] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:59:36,429 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:59:36,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 05:59:36,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432545796] [2022-12-14 05:59:36,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:59:36,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 05:59:36,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:59:36,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 05:59:36,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 05:59:36,430 INFO L87 Difference]: Start difference. First operand 79128 states and 116811 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 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 05:59:44,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:59:44,796 INFO L93 Difference]: Finished difference Result 297436 states and 438398 transitions. [2022-12-14 05:59:44,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 05:59:44,797 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 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 101 [2022-12-14 05:59:44,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:59:45,542 INFO L225 Difference]: With dead ends: 297436 [2022-12-14 05:59:45,542 INFO L226 Difference]: Without dead ends: 218314 [2022-12-14 05:59:45,730 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 05:59:45,730 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 1075 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1095 SdHoareTripleChecker+Valid, 795 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 05:59:45,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1095 Valid, 795 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 05:59:45,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218314 states. [2022-12-14 05:59:52,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218314 to 155784. [2022-12-14 05:59:52,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155784 states, 136195 states have (on average 1.4494731818348692) internal successors, (197411), 135940 states have internal predecessors, (197411), 13444 states have call successors, (13444), 5248 states have call predecessors, (13444), 6144 states have return successors, (18052), 14596 states have call predecessors, (18052), 13444 states have call successors, (18052) [2022-12-14 05:59:52,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155784 states to 155784 states and 228907 transitions. [2022-12-14 05:59:52,877 INFO L78 Accepts]: Start accepts. Automaton has 155784 states and 228907 transitions. Word has length 101 [2022-12-14 05:59:52,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:59:52,878 INFO L495 AbstractCegarLoop]: Abstraction has 155784 states and 228907 transitions. [2022-12-14 05:59:52,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 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 05:59:52,878 INFO L276 IsEmpty]: Start isEmpty. Operand 155784 states and 228907 transitions. [2022-12-14 05:59:52,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-12-14 05:59:52,908 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:59:52,908 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:59:52,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 05:59:52,908 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:59:52,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:59:52,908 INFO L85 PathProgramCache]: Analyzing trace with hash 541542429, now seen corresponding path program 1 times [2022-12-14 05:59:52,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:59:52,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394241467] [2022-12-14 05:59:52,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:59:52,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:59:52,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:59:53,061 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 05:59:53,061 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:59:53,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394241467] [2022-12-14 05:59:53,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394241467] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:59:53,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:59:53,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 05:59:53,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224009995] [2022-12-14 05:59:53,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:59:53,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 05:59:53,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:59:53,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 05:59:53,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 05:59:53,063 INFO L87 Difference]: Start difference. First operand 155784 states and 228907 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 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 06:00:05,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:00:05,642 INFO L93 Difference]: Finished difference Result 453452 states and 666221 transitions. [2022-12-14 06:00:05,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 06:00:05,643 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 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 103 [2022-12-14 06:00:05,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:00:06,451 INFO L225 Difference]: With dead ends: 453452 [2022-12-14 06:00:06,451 INFO L226 Difference]: Without dead ends: 297674 [2022-12-14 06:00:06,697 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 06:00:06,698 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 989 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 995 SdHoareTripleChecker+Valid, 750 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:00:06,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [995 Valid, 750 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 06:00:06,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297674 states. [2022-12-14 06:00:18,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297674 to 232520. [2022-12-14 06:00:18,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232520 states, 203203 states have (on average 1.4453477556925833) internal successors, (293699), 202500 states have internal predecessors, (293699), 20100 states have call successors, (20100), 7936 states have call predecessors, (20100), 9216 states have return successors, (26564), 22084 states have call predecessors, (26564), 20100 states have call successors, (26564) [2022-12-14 06:00:18,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232520 states to 232520 states and 340363 transitions. [2022-12-14 06:00:18,754 INFO L78 Accepts]: Start accepts. Automaton has 232520 states and 340363 transitions. Word has length 103 [2022-12-14 06:00:18,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:00:18,755 INFO L495 AbstractCegarLoop]: Abstraction has 232520 states and 340363 transitions. [2022-12-14 06:00:18,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 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 06:00:18,755 INFO L276 IsEmpty]: Start isEmpty. Operand 232520 states and 340363 transitions. [2022-12-14 06:00:18,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-12-14 06:00:18,795 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:00:18,795 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:00:18,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 06:00:18,795 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:00:18,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:00:18,795 INFO L85 PathProgramCache]: Analyzing trace with hash -248569715, now seen corresponding path program 1 times [2022-12-14 06:00:18,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:00:18,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505098894] [2022-12-14 06:00:18,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:00:18,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:00:18,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:00:18,963 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 06:00:18,963 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:00:18,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505098894] [2022-12-14 06:00:18,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505098894] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:00:18,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:00:18,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:00:18,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384742224] [2022-12-14 06:00:18,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:00:18,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:00:18,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:00:18,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:00:18,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:00:18,965 INFO L87 Difference]: Start difference. First operand 232520 states and 340363 transitions. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 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 06:00:39,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:00:39,784 INFO L93 Difference]: Finished difference Result 667820 states and 978125 transitions. [2022-12-14 06:00:39,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 06:00:39,785 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 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 105 [2022-12-14 06:00:39,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:00:41,388 INFO L225 Difference]: With dead ends: 667820 [2022-12-14 06:00:41,388 INFO L226 Difference]: Without dead ends: 435306 [2022-12-14 06:00:41,763 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 06:00:41,764 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 966 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 972 SdHoareTripleChecker+Valid, 740 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:00:41,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [972 Valid, 740 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 06:00:42,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435306 states. [2022-12-14 06:00:59,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435306 to 348008. [2022-12-14 06:01:00,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348008 states, 304067 states have (on average 1.4412711672098584) internal successors, (438243), 302468 states have internal predecessors, (438243), 30116 states have call successors, (30116), 12032 states have call predecessors, (30116), 13824 states have return successors, (39012), 33508 states have call predecessors, (39012), 30116 states have call successors, (39012) [2022-12-14 06:01:01,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348008 states to 348008 states and 507371 transitions. [2022-12-14 06:01:01,650 INFO L78 Accepts]: Start accepts. Automaton has 348008 states and 507371 transitions. Word has length 105 [2022-12-14 06:01:01,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:01:01,650 INFO L495 AbstractCegarLoop]: Abstraction has 348008 states and 507371 transitions. [2022-12-14 06:01:01,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 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 06:01:01,651 INFO L276 IsEmpty]: Start isEmpty. Operand 348008 states and 507371 transitions. [2022-12-14 06:01:01,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-12-14 06:01:01,733 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:01:01,733 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:01:01,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 06:01:01,734 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:01:01,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:01:01,734 INFO L85 PathProgramCache]: Analyzing trace with hash -252984219, now seen corresponding path program 1 times [2022-12-14 06:01:01,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:01:01,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945953122] [2022-12-14 06:01:01,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:01:01,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:01:01,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:01:01,899 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 06:01:01,900 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:01:01,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945953122] [2022-12-14 06:01:01,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945953122] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:01:01,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:01:01,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:01:01,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381203233] [2022-12-14 06:01:01,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:01:01,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:01:01,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:01:01,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:01:01,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:01:01,902 INFO L87 Difference]: Start difference. First operand 348008 states and 507371 transitions. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 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 06:01:49,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:01:49,615 INFO L93 Difference]: Finished difference Result 1240236 states and 1809294 transitions. [2022-12-14 06:01:49,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 06:01:49,616 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 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 107 [2022-12-14 06:01:49,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:01:52,682 INFO L225 Difference]: With dead ends: 1240236 [2022-12-14 06:01:52,682 INFO L226 Difference]: Without dead ends: 892234 [2022-12-14 06:01:53,559 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 06:01:53,560 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 986 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1006 SdHoareTripleChecker+Valid, 772 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:01:53,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1006 Valid, 772 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 06:01:54,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 892234 states. [2022-12-14 06:02:34,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 892234 to 684360. [2022-12-14 06:02:34,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684360 states, 598211 states have (on average 1.4357526023426517) internal successors, (858883), 595268 states have internal predecessors, (858883), 58500 states have call successors, (58500), 24064 states have call predecessors, (58500), 27648 states have return successors, (75396), 65028 states have call predecessors, (75396), 58500 states have call successors, (75396) [2022-12-14 06:02:37,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684360 states to 684360 states and 992779 transitions. [2022-12-14 06:02:37,869 INFO L78 Accepts]: Start accepts. Automaton has 684360 states and 992779 transitions. Word has length 107 [2022-12-14 06:02:37,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:02:37,869 INFO L495 AbstractCegarLoop]: Abstraction has 684360 states and 992779 transitions. [2022-12-14 06:02:37,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 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 06:02:37,869 INFO L276 IsEmpty]: Start isEmpty. Operand 684360 states and 992779 transitions. [2022-12-14 06:02:38,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-12-14 06:02:38,112 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:02:38,113 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:02:38,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 06:02:38,113 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:02:38,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:02:38,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1380762701, now seen corresponding path program 1 times [2022-12-14 06:02:38,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:02:38,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651370690] [2022-12-14 06:02:38,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:02:38,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:02:38,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:02:38,266 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 06:02:38,266 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:02:38,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651370690] [2022-12-14 06:02:38,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651370690] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:02:38,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:02:38,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:02:38,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591808889] [2022-12-14 06:02:38,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:02:38,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:02:38,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:02:38,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:02:38,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:02:38,268 INFO L87 Difference]: Start difference. First operand 684360 states and 992779 transitions. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 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 06:03:54,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:03:54,372 INFO L93 Difference]: Finished difference Result 1913676 states and 2779469 transitions. [2022-12-14 06:03:54,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 06:03:54,373 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 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 109 [2022-12-14 06:03:54,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:03:58,936 INFO L225 Difference]: With dead ends: 1913676 [2022-12-14 06:03:58,936 INFO L226 Difference]: Without dead ends: 1229322 [2022-12-14 06:04:00,522 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 06:04:00,522 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 878 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 884 SdHoareTripleChecker+Valid, 881 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 06:04:00,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [884 Valid, 881 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 06:04:01,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1229322 states. [2022-12-14 06:05:08,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1229322 to 1026312. [2022-12-14 06:05:09,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1026312 states, 897443 states have (on average 1.4323750923456977) internal successors, (1285475), 892004 states have internal predecessors, (1285475), 87524 states have call successors, (87524), 36480 states have call predecessors, (87524), 41344 states have return successors, (110116), 97828 states have call predecessors, (110116), 87524 states have call successors, (110116) [2022-12-14 06:05:14,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1026312 states to 1026312 states and 1483115 transitions. [2022-12-14 06:05:15,007 INFO L78 Accepts]: Start accepts. Automaton has 1026312 states and 1483115 transitions. Word has length 109 [2022-12-14 06:05:15,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:05:15,008 INFO L495 AbstractCegarLoop]: Abstraction has 1026312 states and 1483115 transitions. [2022-12-14 06:05:15,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 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 06:05:15,008 INFO L276 IsEmpty]: Start isEmpty. Operand 1026312 states and 1483115 transitions. [2022-12-14 06:05:15,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-12-14 06:05:15,131 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:05:15,131 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:05:15,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 06:05:15,132 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:05:15,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:05:15,132 INFO L85 PathProgramCache]: Analyzing trace with hash 666377901, now seen corresponding path program 1 times [2022-12-14 06:05:15,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:05:15,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964732105] [2022-12-14 06:05:15,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:05:15,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:05:15,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:05:15,289 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 06:05:15,289 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:05:15,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964732105] [2022-12-14 06:05:15,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964732105] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:05:15,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:05:15,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:05:15,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687735079] [2022-12-14 06:05:15,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:05:15,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:05:15,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:05:15,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:05:15,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:05:15,291 INFO L87 Difference]: Start difference. First operand 1026312 states and 1483115 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 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)