./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 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_5647f236-04a6-463d-9186-f2025ba86181/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5647f236-04a6-463d-9186-f2025ba86181/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5647f236-04a6-463d-9186-f2025ba86181/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5647f236-04a6-463d-9186-f2025ba86181/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5647f236-04a6-463d-9186-f2025ba86181/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5647f236-04a6-463d-9186-f2025ba86181/bin/utaipan-g80aRyZoba --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 50e151318da71693ecfd101451d51852511de48fd25109c1f84fed946653f0cd --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-22 02:14:22,401 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 02:14:22,403 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 02:14:22,434 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 02:14:22,434 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 02:14:22,443 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 02:14:22,446 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 02:14:22,450 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 02:14:22,452 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 02:14:22,459 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 02:14:22,460 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 02:14:22,461 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 02:14:22,461 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 02:14:22,462 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 02:14:22,463 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 02:14:22,464 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 02:14:22,464 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 02:14:22,465 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 02:14:22,467 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 02:14:22,469 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 02:14:22,470 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 02:14:22,479 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 02:14:22,481 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 02:14:22,482 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 02:14:22,492 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 02:14:22,492 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 02:14:22,492 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 02:14:22,493 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 02:14:22,494 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 02:14:22,495 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 02:14:22,495 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 02:14:22,496 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 02:14:22,497 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 02:14:22,497 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 02:14:22,498 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 02:14:22,506 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 02:14:22,507 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 02:14:22,507 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 02:14:22,507 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 02:14:22,508 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 02:14:22,509 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 02:14:22,510 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5647f236-04a6-463d-9186-f2025ba86181/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 02:14:22,555 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 02:14:22,555 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 02:14:22,556 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 02:14:22,556 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 02:14:22,556 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 02:14:22,557 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 02:14:22,557 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 02:14:22,557 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 02:14:22,557 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 02:14:22,557 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 02:14:22,558 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 02:14:22,558 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 02:14:22,558 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 02:14:22,558 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 02:14:22,558 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 02:14:22,559 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 02:14:22,559 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 02:14:22,559 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 02:14:22,560 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 02:14:22,560 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 02:14:22,560 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 02:14:22,560 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 02:14:22,561 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 02:14:22,561 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 02:14:22,561 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 02:14:22,561 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 02:14:22,561 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 02:14:22,562 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 02:14:22,562 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 02:14:22,562 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 02:14:22,562 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 02:14:22,563 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 02:14:22,563 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:14:22,563 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 02:14:22,563 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 02:14:22,563 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 02:14:22,564 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 02:14:22,564 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 02:14:22,564 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 02:14:22,564 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 02:14:22,564 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 02:14:22,565 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_5647f236-04a6-463d-9186-f2025ba86181/bin/utaipan-g80aRyZoba/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5647f236-04a6-463d-9186-f2025ba86181/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 50e151318da71693ecfd101451d51852511de48fd25109c1f84fed946653f0cd [2022-11-22 02:14:22,834 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 02:14:22,890 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 02:14:22,892 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 02:14:22,894 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 02:14:22,894 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 02:14:22,895 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5647f236-04a6-463d-9186-f2025ba86181/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-11-22 02:14:25,963 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 02:14:26,234 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 02:14:26,234 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5647f236-04a6-463d-9186-f2025ba86181/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-11-22 02:14:26,247 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5647f236-04a6-463d-9186-f2025ba86181/bin/utaipan-g80aRyZoba/data/55f4f81a7/85db89b1419c4de7bf0fc294119f742a/FLAG4cfa77fdc [2022-11-22 02:14:26,267 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5647f236-04a6-463d-9186-f2025ba86181/bin/utaipan-g80aRyZoba/data/55f4f81a7/85db89b1419c4de7bf0fc294119f742a [2022-11-22 02:14:26,274 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 02:14:26,276 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 02:14:26,278 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 02:14:26,278 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 02:14:26,282 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 02:14:26,283 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:14:26" (1/1) ... [2022-11-22 02:14:26,284 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50179ef1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:14:26, skipping insertion in model container [2022-11-22 02:14:26,285 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:14:26" (1/1) ... [2022-11-22 02:14:26,293 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 02:14:26,354 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 02:14:26,565 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_5647f236-04a6-463d-9186-f2025ba86181/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7667,7680] [2022-11-22 02:14:26,600 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:14:26,627 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 02:14:26,709 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_5647f236-04a6-463d-9186-f2025ba86181/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7667,7680] [2022-11-22 02:14:26,745 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:14:26,765 INFO L208 MainTranslator]: Completed translation [2022-11-22 02:14:26,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:14:26 WrapperNode [2022-11-22 02:14:26,765 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 02:14:26,767 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 02:14:26,767 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 02:14:26,767 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 02:14:26,775 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:14:26" (1/1) ... [2022-11-22 02:14:26,786 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:14:26" (1/1) ... [2022-11-22 02:14:26,820 INFO L138 Inliner]: procedures = 27, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 572 [2022-11-22 02:14:26,821 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 02:14:26,822 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 02:14:26,822 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 02:14:26,822 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 02:14:26,831 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:14:26" (1/1) ... [2022-11-22 02:14:26,831 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:14:26" (1/1) ... [2022-11-22 02:14:26,834 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:14:26" (1/1) ... [2022-11-22 02:14:26,835 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:14:26" (1/1) ... [2022-11-22 02:14:26,843 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:14:26" (1/1) ... [2022-11-22 02:14:26,848 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:14:26" (1/1) ... [2022-11-22 02:14:26,851 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:14:26" (1/1) ... [2022-11-22 02:14:26,853 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:14:26" (1/1) ... [2022-11-22 02:14:26,857 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 02:14:26,857 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 02:14:26,858 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 02:14:26,858 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 02:14:26,858 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:14:26" (1/1) ... [2022-11-22 02:14:26,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:14:26,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5647f236-04a6-463d-9186-f2025ba86181/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:14:26,901 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5647f236-04a6-463d-9186-f2025ba86181/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 02:14:26,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5647f236-04a6-463d-9186-f2025ba86181/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 02:14:26,949 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 02:14:26,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 02:14:26,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 02:14:26,950 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 02:14:27,172 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 02:14:27,174 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 02:14:27,907 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 02:14:28,127 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 02:14:28,134 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-22 02:14:28,137 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:14:28 BoogieIcfgContainer [2022-11-22 02:14:28,137 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 02:14:28,141 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 02:14:28,142 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 02:14:28,145 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 02:14:28,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:14:26" (1/3) ... [2022-11-22 02:14:28,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6303d25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:14:28, skipping insertion in model container [2022-11-22 02:14:28,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:14:26" (2/3) ... [2022-11-22 02:14:28,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6303d25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:14:28, skipping insertion in model container [2022-11-22 02:14:28,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:14:28" (3/3) ... [2022-11-22 02:14:28,148 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.7.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-11-22 02:14:28,167 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 02:14:28,168 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 02:14:28,221 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 02:14:28,228 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;@20338392, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 02:14:28,228 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 02:14:28,235 INFO L276 IsEmpty]: Start isEmpty. Operand has 105 states, 103 states have (on average 1.7475728155339805) internal successors, (180), 104 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:14:28,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-22 02:14:28,252 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:14:28,254 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] [2022-11-22 02:14:28,255 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:14:28,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:14:28,264 INFO L85 PathProgramCache]: Analyzing trace with hash 581733088, now seen corresponding path program 1 times [2022-11-22 02:14:28,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:14:28,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84339267] [2022-11-22 02:14:28,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:14:28,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:14:28,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:14:28,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:14:28,802 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:14:28,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84339267] [2022-11-22 02:14:28,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84339267] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:14:28,803 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:14:28,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:14:28,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785132828] [2022-11-22 02:14:28,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:14:28,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:14:28,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:14:28,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:14:28,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:14:28,843 INFO L87 Difference]: Start difference. First operand has 105 states, 103 states have (on average 1.7475728155339805) internal successors, (180), 104 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:14:28,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:14:28,958 INFO L93 Difference]: Finished difference Result 207 states and 328 transitions. [2022-11-22 02:14:28,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:14:28,961 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-11-22 02:14:28,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:14:28,970 INFO L225 Difference]: With dead ends: 207 [2022-11-22 02:14:28,971 INFO L226 Difference]: Without dead ends: 150 [2022-11-22 02:14:28,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:14:28,977 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 119 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:14:28,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 295 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:14:28,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-11-22 02:14:29,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2022-11-22 02:14:29,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.3197278911564625) internal successors, (194), 147 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:14:29,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 194 transitions. [2022-11-22 02:14:29,029 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 194 transitions. Word has length 71 [2022-11-22 02:14:29,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:14:29,030 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 194 transitions. [2022-11-22 02:14:29,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:14:29,030 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 194 transitions. [2022-11-22 02:14:29,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-22 02:14:29,032 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:14:29,033 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] [2022-11-22 02:14:29,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 02:14:29,033 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:14:29,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:14:29,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1513983419, now seen corresponding path program 1 times [2022-11-22 02:14:29,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:14:29,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559960257] [2022-11-22 02:14:29,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:14:29,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:14:29,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:14:29,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:14:29,215 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:14:29,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559960257] [2022-11-22 02:14:29,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559960257] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:14:29,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:14:29,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:14:29,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083634087] [2022-11-22 02:14:29,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:14:29,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:14:29,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:14:29,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:14:29,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:14:29,221 INFO L87 Difference]: Start difference. First operand 148 states and 194 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:14:29,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:14:29,359 INFO L93 Difference]: Finished difference Result 332 states and 466 transitions. [2022-11-22 02:14:29,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:14:29,361 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2022-11-22 02:14:29,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:14:29,363 INFO L225 Difference]: With dead ends: 332 [2022-11-22 02:14:29,367 INFO L226 Difference]: Without dead ends: 236 [2022-11-22 02:14:29,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:14:29,369 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 67 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:14:29,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 236 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:14:29,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-11-22 02:14:29,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 234. [2022-11-22 02:14:29,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.3776824034334765) internal successors, (321), 233 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:14:29,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 321 transitions. [2022-11-22 02:14:29,409 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 321 transitions. Word has length 74 [2022-11-22 02:14:29,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:14:29,409 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 321 transitions. [2022-11-22 02:14:29,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:14:29,410 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 321 transitions. [2022-11-22 02:14:29,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-22 02:14:29,412 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:14:29,412 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] [2022-11-22 02:14:29,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 02:14:29,412 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:14:29,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:14:29,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1718077475, now seen corresponding path program 1 times [2022-11-22 02:14:29,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:14:29,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140743271] [2022-11-22 02:14:29,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:14:29,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:14:29,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:14:29,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:14:29,528 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:14:29,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140743271] [2022-11-22 02:14:29,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140743271] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:14:29,529 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:14:29,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:14:29,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838077921] [2022-11-22 02:14:29,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:14:29,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:14:29,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:14:29,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:14:29,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:14:29,532 INFO L87 Difference]: Start difference. First operand 234 states and 321 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:14:29,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:14:29,626 INFO L93 Difference]: Finished difference Result 582 states and 835 transitions. [2022-11-22 02:14:29,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:14:29,627 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-11-22 02:14:29,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:14:29,630 INFO L225 Difference]: With dead ends: 582 [2022-11-22 02:14:29,631 INFO L226 Difference]: Without dead ends: 400 [2022-11-22 02:14:29,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:14:29,633 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 62 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:14:29,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 232 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:14:29,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2022-11-22 02:14:29,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 398. [2022-11-22 02:14:29,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 1.4130982367758187) internal successors, (561), 397 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:14:29,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 561 transitions. [2022-11-22 02:14:29,697 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 561 transitions. Word has length 77 [2022-11-22 02:14:29,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:14:29,698 INFO L495 AbstractCegarLoop]: Abstraction has 398 states and 561 transitions. [2022-11-22 02:14:29,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:14:29,698 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 561 transitions. [2022-11-22 02:14:29,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-22 02:14:29,700 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:14:29,701 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, 1, 1, 1] [2022-11-22 02:14:29,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 02:14:29,701 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:14:29,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:14:29,702 INFO L85 PathProgramCache]: Analyzing trace with hash 414824335, now seen corresponding path program 1 times [2022-11-22 02:14:29,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:14:29,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620174138] [2022-11-22 02:14:29,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:14:29,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:14:29,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:14:29,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:14:29,866 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:14:29,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620174138] [2022-11-22 02:14:29,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620174138] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:14:29,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:14:29,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:14:29,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142303540] [2022-11-22 02:14:29,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:14:29,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:14:29,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:14:29,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:14:29,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:14:29,868 INFO L87 Difference]: Start difference. First operand 398 states and 561 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:14:30,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:14:30,036 INFO L93 Difference]: Finished difference Result 1058 states and 1531 transitions. [2022-11-22 02:14:30,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:14:30,037 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-22 02:14:30,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:14:30,040 INFO L225 Difference]: With dead ends: 1058 [2022-11-22 02:14:30,041 INFO L226 Difference]: Without dead ends: 712 [2022-11-22 02:14:30,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:14:30,054 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 57 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:14:30,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 228 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:14:30,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2022-11-22 02:14:30,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 710. [2022-11-22 02:14:30,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 709 states have (on average 1.4287729196050776) internal successors, (1013), 709 states have internal predecessors, (1013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:14:30,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 1013 transitions. [2022-11-22 02:14:30,174 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 1013 transitions. Word has length 80 [2022-11-22 02:14:30,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:14:30,176 INFO L495 AbstractCegarLoop]: Abstraction has 710 states and 1013 transitions. [2022-11-22 02:14:30,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:14:30,177 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 1013 transitions. [2022-11-22 02:14:30,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-22 02:14:30,185 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:14:30,186 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, 1, 1, 1, 1, 1, 1] [2022-11-22 02:14:30,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 02:14:30,187 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:14:30,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:14:30,188 INFO L85 PathProgramCache]: Analyzing trace with hash 603450138, now seen corresponding path program 1 times [2022-11-22 02:14:30,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:14:30,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568617733] [2022-11-22 02:14:30,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:14:30,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:14:30,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:14:30,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:14:30,389 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:14:30,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568617733] [2022-11-22 02:14:30,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568617733] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:14:30,390 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:14:30,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:14:30,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224133348] [2022-11-22 02:14:30,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:14:30,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:14:30,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:14:30,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:14:30,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:14:30,396 INFO L87 Difference]: Start difference. First operand 710 states and 1013 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:14:30,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:14:30,713 INFO L93 Difference]: Finished difference Result 1962 states and 2839 transitions. [2022-11-22 02:14:30,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:14:30,714 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2022-11-22 02:14:30,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:14:30,721 INFO L225 Difference]: With dead ends: 1962 [2022-11-22 02:14:30,721 INFO L226 Difference]: Without dead ends: 1304 [2022-11-22 02:14:30,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:14:30,726 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 52 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:14:30,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 224 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:14:30,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1304 states. [2022-11-22 02:14:30,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1304 to 1302. [2022-11-22 02:14:30,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1302 states, 1301 states have (on average 1.4304381245196003) internal successors, (1861), 1301 states have internal predecessors, (1861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:14:30,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 1861 transitions. [2022-11-22 02:14:30,953 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 1861 transitions. Word has length 83 [2022-11-22 02:14:30,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:14:30,955 INFO L495 AbstractCegarLoop]: Abstraction has 1302 states and 1861 transitions. [2022-11-22 02:14:30,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:14:30,956 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 1861 transitions. [2022-11-22 02:14:30,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-22 02:14:30,963 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:14:30,963 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:14:30,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-22 02:14:30,963 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:14:30,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:14:30,965 INFO L85 PathProgramCache]: Analyzing trace with hash 49911211, now seen corresponding path program 1 times [2022-11-22 02:14:30,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:14:30,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011346375] [2022-11-22 02:14:30,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:14:30,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:14:31,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:14:31,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:14:31,125 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:14:31,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011346375] [2022-11-22 02:14:31,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011346375] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:14:31,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:14:31,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:14:31,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184322453] [2022-11-22 02:14:31,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:14:31,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:14:31,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:14:31,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:14:31,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:14:31,129 INFO L87 Difference]: Start difference. First operand 1302 states and 1861 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:14:31,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:14:31,574 INFO L93 Difference]: Finished difference Result 3674 states and 5287 transitions. [2022-11-22 02:14:31,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:14:31,574 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2022-11-22 02:14:31,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:14:31,583 INFO L225 Difference]: With dead ends: 3674 [2022-11-22 02:14:31,584 INFO L226 Difference]: Without dead ends: 2424 [2022-11-22 02:14:31,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:14:31,587 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 47 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:14:31,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 220 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:14:31,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2424 states. [2022-11-22 02:14:32,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2424 to 2422. [2022-11-22 02:14:32,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2422 states, 2421 states have (on average 1.4229657166460141) internal successors, (3445), 2421 states have internal predecessors, (3445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:14:32,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2422 states to 2422 states and 3445 transitions. [2022-11-22 02:14:32,014 INFO L78 Accepts]: Start accepts. Automaton has 2422 states and 3445 transitions. Word has length 86 [2022-11-22 02:14:32,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:14:32,014 INFO L495 AbstractCegarLoop]: Abstraction has 2422 states and 3445 transitions. [2022-11-22 02:14:32,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:14:32,014 INFO L276 IsEmpty]: Start isEmpty. Operand 2422 states and 3445 transitions. [2022-11-22 02:14:32,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-22 02:14:32,015 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:14:32,016 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:14:32,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-22 02:14:32,016 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:14:32,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:14:32,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1603620760, now seen corresponding path program 1 times [2022-11-22 02:14:32,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:14:32,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099631279] [2022-11-22 02:14:32,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:14:32,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:14:32,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:14:32,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:14:32,102 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:14:32,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099631279] [2022-11-22 02:14:32,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099631279] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:14:32,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:14:32,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:14:32,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518146956] [2022-11-22 02:14:32,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:14:32,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:14:32,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:14:32,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:14:32,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:14:32,104 INFO L87 Difference]: Start difference. First operand 2422 states and 3445 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:14:32,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:14:32,847 INFO L93 Difference]: Finished difference Result 6906 states and 9847 transitions. [2022-11-22 02:14:32,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:14:32,848 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2022-11-22 02:14:32,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:14:32,862 INFO L225 Difference]: With dead ends: 6906 [2022-11-22 02:14:32,862 INFO L226 Difference]: Without dead ends: 4536 [2022-11-22 02:14:32,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:14:32,866 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 42 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:14:32,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 216 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:14:32,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4536 states. [2022-11-22 02:14:33,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4536 to 4534. [2022-11-22 02:14:33,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4534 states, 4533 states have (on average 1.4094418707257887) internal successors, (6389), 4533 states have internal predecessors, (6389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:14:33,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4534 states to 4534 states and 6389 transitions. [2022-11-22 02:14:33,539 INFO L78 Accepts]: Start accepts. Automaton has 4534 states and 6389 transitions. Word has length 89 [2022-11-22 02:14:33,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:14:33,540 INFO L495 AbstractCegarLoop]: Abstraction has 4534 states and 6389 transitions. [2022-11-22 02:14:33,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:14:33,540 INFO L276 IsEmpty]: Start isEmpty. Operand 4534 states and 6389 transitions. [2022-11-22 02:14:33,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-22 02:14:33,541 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:14:33,541 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:14:33,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-22 02:14:33,541 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:14:33,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:14:33,542 INFO L85 PathProgramCache]: Analyzing trace with hash 352834937, now seen corresponding path program 1 times [2022-11-22 02:14:33,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:14:33,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920707531] [2022-11-22 02:14:33,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:14:33,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:14:33,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:14:33,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:14:33,766 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:14:33,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920707531] [2022-11-22 02:14:33,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920707531] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:14:33,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:14:33,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-22 02:14:33,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576949911] [2022-11-22 02:14:33,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:14:33,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-22 02:14:33,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:14:33,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-22 02:14:33,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-22 02:14:33,768 INFO L87 Difference]: Start difference. First operand 4534 states and 6389 transitions. Second operand has 9 states, 9 states have (on average 10.222222222222221) internal successors, (92), 9 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:14:36,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:14:36,465 INFO L93 Difference]: Finished difference Result 18170 states and 25800 transitions. [2022-11-22 02:14:36,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-22 02:14:36,465 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.222222222222221) internal successors, (92), 9 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-11-22 02:14:36,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:14:36,512 INFO L225 Difference]: With dead ends: 18170 [2022-11-22 02:14:36,513 INFO L226 Difference]: Without dead ends: 13688 [2022-11-22 02:14:36,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2022-11-22 02:14:36,521 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 1113 mSDsluCounter, 3164 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1113 SdHoareTripleChecker+Valid, 3279 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:14:36,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1113 Valid, 3279 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 02:14:36,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13688 states. [2022-11-22 02:14:37,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13688 to 5938. [2022-11-22 02:14:37,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5938 states, 5937 states have (on average 1.3986862051541182) internal successors, (8304), 5937 states have internal predecessors, (8304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:14:37,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5938 states to 5938 states and 8304 transitions. [2022-11-22 02:14:37,644 INFO L78 Accepts]: Start accepts. Automaton has 5938 states and 8304 transitions. Word has length 92 [2022-11-22 02:14:37,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:14:37,644 INFO L495 AbstractCegarLoop]: Abstraction has 5938 states and 8304 transitions. [2022-11-22 02:14:37,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.222222222222221) internal successors, (92), 9 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:14:37,645 INFO L276 IsEmpty]: Start isEmpty. Operand 5938 states and 8304 transitions. [2022-11-22 02:14:37,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-22 02:14:37,646 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:14:37,646 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:14:37,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-22 02:14:37,646 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:14:37,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:14:37,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1139820540, now seen corresponding path program 1 times [2022-11-22 02:14:37,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:14:37,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381158511] [2022-11-22 02:14:37,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:14:37,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:14:37,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:14:37,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:14:37,785 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:14:37,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381158511] [2022-11-22 02:14:37,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381158511] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:14:37,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:14:37,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:14:37,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401834925] [2022-11-22 02:14:37,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:14:37,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:14:37,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:14:37,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:14:37,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:14:37,789 INFO L87 Difference]: Start difference. First operand 5938 states and 8304 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:14:39,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:14:39,443 INFO L93 Difference]: Finished difference Result 15216 states and 21418 transitions. [2022-11-22 02:14:39,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:14:39,444 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2022-11-22 02:14:39,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:14:39,479 INFO L225 Difference]: With dead ends: 15216 [2022-11-22 02:14:39,480 INFO L226 Difference]: Without dead ends: 9330 [2022-11-22 02:14:39,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:14:39,490 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 36 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:14:39,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 183 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:14:39,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9330 states. [2022-11-22 02:14:40,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9330 to 9328. [2022-11-22 02:14:40,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9328 states, 9327 states have (on average 1.4045244987670205) internal successors, (13100), 9327 states have internal predecessors, (13100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:14:40,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9328 states to 9328 states and 13100 transitions. [2022-11-22 02:14:40,992 INFO L78 Accepts]: Start accepts. Automaton has 9328 states and 13100 transitions. Word has length 94 [2022-11-22 02:14:40,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:14:40,993 INFO L495 AbstractCegarLoop]: Abstraction has 9328 states and 13100 transitions. [2022-11-22 02:14:40,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:14:40,993 INFO L276 IsEmpty]: Start isEmpty. Operand 9328 states and 13100 transitions. [2022-11-22 02:14:40,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-22 02:14:40,994 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:14:40,995 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:14:40,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-22 02:14:40,995 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:14:40,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:14:40,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1128857452, now seen corresponding path program 1 times [2022-11-22 02:14:40,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:14:40,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839452959] [2022-11-22 02:14:40,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:14:40,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:14:41,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:14:41,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:14:41,556 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:14:41,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839452959] [2022-11-22 02:14:41,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839452959] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:14:41,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:14:41,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-22 02:14:41,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873213620] [2022-11-22 02:14:41,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:14:41,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-22 02:14:41,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:14:41,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-22 02:14:41,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-22 02:14:41,560 INFO L87 Difference]: Start difference. First operand 9328 states and 13100 transitions. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:14:43,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:14:43,397 INFO L93 Difference]: Finished difference Result 18604 states and 26147 transitions. [2022-11-22 02:14:43,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-22 02:14:43,398 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2022-11-22 02:14:43,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:14:43,427 INFO L225 Difference]: With dead ends: 18604 [2022-11-22 02:14:43,427 INFO L226 Difference]: Without dead ends: 9330 [2022-11-22 02:14:43,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2022-11-22 02:14:43,444 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 550 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:14:43,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [550 Valid, 552 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:14:43,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9330 states. [2022-11-22 02:14:44,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9330 to 9328. [2022-11-22 02:14:44,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9328 states, 9327 states have (on average 1.4043100675458347) internal successors, (13098), 9327 states have internal predecessors, (13098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:14:44,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9328 states to 9328 states and 13098 transitions. [2022-11-22 02:14:44,703 INFO L78 Accepts]: Start accepts. Automaton has 9328 states and 13098 transitions. Word has length 94 [2022-11-22 02:14:44,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:14:44,703 INFO L495 AbstractCegarLoop]: Abstraction has 9328 states and 13098 transitions. [2022-11-22 02:14:44,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:14:44,704 INFO L276 IsEmpty]: Start isEmpty. Operand 9328 states and 13098 transitions. [2022-11-22 02:14:44,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-22 02:14:44,707 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:14:44,708 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:14:44,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-22 02:14:44,708 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:14:44,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:14:44,709 INFO L85 PathProgramCache]: Analyzing trace with hash -626712346, now seen corresponding path program 1 times [2022-11-22 02:14:44,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:14:44,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819996508] [2022-11-22 02:14:44,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:14:44,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:14:44,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:14:44,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:14:44,841 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:14:44,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819996508] [2022-11-22 02:14:44,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819996508] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:14:44,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:14:44,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:14:44,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475676536] [2022-11-22 02:14:44,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:14:44,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:14:44,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:14:44,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:14:44,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:14:44,844 INFO L87 Difference]: Start difference. First operand 9328 states and 13098 transitions. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:14:46,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:14:46,572 INFO L93 Difference]: Finished difference Result 18602 states and 26142 transitions. [2022-11-22 02:14:46,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:14:46,573 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2022-11-22 02:14:46,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:14:46,595 INFO L225 Difference]: With dead ends: 18602 [2022-11-22 02:14:46,595 INFO L226 Difference]: Without dead ends: 9328 [2022-11-22 02:14:46,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:14:46,609 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 252 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:14:46,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 118 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:14:46,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9328 states. [2022-11-22 02:14:48,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9328 to 9328. [2022-11-22 02:14:48,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9328 states, 9327 states have (on average 1.3935885064865445) internal successors, (12998), 9327 states have internal predecessors, (12998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:14:48,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9328 states to 9328 states and 12998 transitions. [2022-11-22 02:14:48,642 INFO L78 Accepts]: Start accepts. Automaton has 9328 states and 12998 transitions. Word has length 95 [2022-11-22 02:14:48,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:14:48,643 INFO L495 AbstractCegarLoop]: Abstraction has 9328 states and 12998 transitions. [2022-11-22 02:14:48,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:14:48,643 INFO L276 IsEmpty]: Start isEmpty. Operand 9328 states and 12998 transitions. [2022-11-22 02:14:48,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-22 02:14:48,644 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:14:48,644 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:14:48,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-22 02:14:48,644 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:14:48,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:14:48,645 INFO L85 PathProgramCache]: Analyzing trace with hash 238820043, now seen corresponding path program 1 times [2022-11-22 02:14:48,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:14:48,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250519099] [2022-11-22 02:14:48,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:14:48,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:14:48,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:14:48,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:14:48,764 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:14:48,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250519099] [2022-11-22 02:14:48,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250519099] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:14:48,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:14:48,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:14:48,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483513321] [2022-11-22 02:14:48,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:14:48,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:14:48,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:14:48,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:14:48,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:14:48,767 INFO L87 Difference]: Start difference. First operand 9328 states and 12998 transitions. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:14:50,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:14:50,503 INFO L93 Difference]: Finished difference Result 18602 states and 25942 transitions. [2022-11-22 02:14:50,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:14:50,504 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2022-11-22 02:14:50,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:14:50,525 INFO L225 Difference]: With dead ends: 18602 [2022-11-22 02:14:50,525 INFO L226 Difference]: Without dead ends: 9328 [2022-11-22 02:14:50,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:14:50,539 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 314 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:14:50,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 78 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:14:50,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9328 states. [2022-11-22 02:14:52,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9328 to 9328. [2022-11-22 02:14:52,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9328 states, 9327 states have (on average 1.3661413101747615) internal successors, (12742), 9327 states have internal predecessors, (12742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:14:52,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9328 states to 9328 states and 12742 transitions. [2022-11-22 02:14:52,139 INFO L78 Accepts]: Start accepts. Automaton has 9328 states and 12742 transitions. Word has length 95 [2022-11-22 02:14:52,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:14:52,139 INFO L495 AbstractCegarLoop]: Abstraction has 9328 states and 12742 transitions. [2022-11-22 02:14:52,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:14:52,139 INFO L276 IsEmpty]: Start isEmpty. Operand 9328 states and 12742 transitions. [2022-11-22 02:14:52,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-22 02:14:52,140 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:14:52,140 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:14:52,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-22 02:14:52,141 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:14:52,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:14:52,141 INFO L85 PathProgramCache]: Analyzing trace with hash -123298682, now seen corresponding path program 1 times [2022-11-22 02:14:52,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:14:52,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455462610] [2022-11-22 02:14:52,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:14:52,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:14:52,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:14:52,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:14:52,256 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:14:52,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455462610] [2022-11-22 02:14:52,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455462610] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:14:52,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:14:52,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:14:52,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574832645] [2022-11-22 02:14:52,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:14:52,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:14:52,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:14:52,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:14:52,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:14:52,258 INFO L87 Difference]: Start difference. First operand 9328 states and 12742 transitions. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:14:54,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:14:54,066 INFO L93 Difference]: Finished difference Result 18602 states and 25430 transitions. [2022-11-22 02:14:54,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:14:54,067 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2022-11-22 02:14:54,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:14:54,078 INFO L225 Difference]: With dead ends: 18602 [2022-11-22 02:14:54,078 INFO L226 Difference]: Without dead ends: 9328 [2022-11-22 02:14:54,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:14:54,093 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 233 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:14:54,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 126 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:14:54,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9328 states. [2022-11-22 02:14:55,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9328 to 9328. [2022-11-22 02:14:55,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9328 states, 9327 states have (on average 1.355634180336657) internal successors, (12644), 9327 states have internal predecessors, (12644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:14:55,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9328 states to 9328 states and 12644 transitions. [2022-11-22 02:14:55,895 INFO L78 Accepts]: Start accepts. Automaton has 9328 states and 12644 transitions. Word has length 95 [2022-11-22 02:14:55,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:14:55,895 INFO L495 AbstractCegarLoop]: Abstraction has 9328 states and 12644 transitions. [2022-11-22 02:14:55,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:14:55,896 INFO L276 IsEmpty]: Start isEmpty. Operand 9328 states and 12644 transitions. [2022-11-22 02:14:55,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-22 02:14:55,897 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:14:55,897 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:14:55,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-22 02:14:55,897 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:14:55,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:14:55,898 INFO L85 PathProgramCache]: Analyzing trace with hash -652589183, now seen corresponding path program 1 times [2022-11-22 02:14:55,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:14:55,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167749254] [2022-11-22 02:14:55,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:14:55,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:14:55,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:14:56,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:14:56,036 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:14:56,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167749254] [2022-11-22 02:14:56,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167749254] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:14:56,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:14:56,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:14:56,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531323884] [2022-11-22 02:14:56,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:14:56,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:14:56,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:14:56,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:14:56,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:14:56,038 INFO L87 Difference]: Start difference. First operand 9328 states and 12644 transitions. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:14:58,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:14:58,542 INFO L93 Difference]: Finished difference Result 18602 states and 25234 transitions. [2022-11-22 02:14:58,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:14:58,542 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2022-11-22 02:14:58,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:14:58,554 INFO L225 Difference]: With dead ends: 18602 [2022-11-22 02:14:58,554 INFO L226 Difference]: Without dead ends: 9328 [2022-11-22 02:14:58,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:14:58,564 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 269 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:14:58,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 102 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:14:58,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9328 states. [2022-11-22 02:15:00,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9328 to 9328. [2022-11-22 02:15:00,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9328 states, 9327 states have (on average 1.343626031950252) internal successors, (12532), 9327 states have internal predecessors, (12532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:15:00,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9328 states to 9328 states and 12532 transitions. [2022-11-22 02:15:00,302 INFO L78 Accepts]: Start accepts. Automaton has 9328 states and 12532 transitions. Word has length 95 [2022-11-22 02:15:00,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:15:00,302 INFO L495 AbstractCegarLoop]: Abstraction has 9328 states and 12532 transitions. [2022-11-22 02:15:00,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:15:00,303 INFO L276 IsEmpty]: Start isEmpty. Operand 9328 states and 12532 transitions. [2022-11-22 02:15:00,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-22 02:15:00,303 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:15:00,304 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:15:00,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-22 02:15:00,304 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:15:00,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:15:00,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1415452890, now seen corresponding path program 1 times [2022-11-22 02:15:00,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:15:00,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230229624] [2022-11-22 02:15:00,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:15:00,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:15:00,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:15:00,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:15:00,428 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:15:00,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230229624] [2022-11-22 02:15:00,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230229624] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:15:00,429 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:15:00,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:15:00,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955459874] [2022-11-22 02:15:00,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:15:00,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:15:00,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:15:00,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:15:00,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:15:00,430 INFO L87 Difference]: Start difference. First operand 9328 states and 12532 transitions. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:15:02,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:15:02,347 INFO L93 Difference]: Finished difference Result 18602 states and 25010 transitions. [2022-11-22 02:15:02,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:15:02,348 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2022-11-22 02:15:02,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:15:02,360 INFO L225 Difference]: With dead ends: 18602 [2022-11-22 02:15:02,360 INFO L226 Difference]: Without dead ends: 9328 [2022-11-22 02:15:02,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:15:02,370 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 292 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:15:02,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 86 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:15:02,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9328 states. [2022-11-22 02:15:04,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9328 to 9328. [2022-11-22 02:15:04,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9328 states, 9327 states have (on average 1.3264715342553877) internal successors, (12372), 9327 states have internal predecessors, (12372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:15:04,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9328 states to 9328 states and 12372 transitions. [2022-11-22 02:15:04,081 INFO L78 Accepts]: Start accepts. Automaton has 9328 states and 12372 transitions. Word has length 95 [2022-11-22 02:15:04,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:15:04,081 INFO L495 AbstractCegarLoop]: Abstraction has 9328 states and 12372 transitions. [2022-11-22 02:15:04,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:15:04,082 INFO L276 IsEmpty]: Start isEmpty. Operand 9328 states and 12372 transitions. [2022-11-22 02:15:04,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-22 02:15:04,082 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:15:04,083 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:15:04,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-22 02:15:04,083 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:15:04,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:15:04,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1138097291, now seen corresponding path program 1 times [2022-11-22 02:15:04,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:15:04,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539101884] [2022-11-22 02:15:04,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:15:04,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:15:04,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:15:04,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:15:04,406 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:15:04,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539101884] [2022-11-22 02:15:04,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539101884] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:15:04,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:15:04,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 02:15:04,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041523084] [2022-11-22 02:15:04,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:15:04,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 02:15:04,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:15:04,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 02:15:04,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:15:04,409 INFO L87 Difference]: Start difference. First operand 9328 states and 12372 transitions. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:15:07,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:15:07,312 INFO L93 Difference]: Finished difference Result 12899 states and 17018 transitions. [2022-11-22 02:15:07,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-22 02:15:07,313 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2022-11-22 02:15:07,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:15:07,330 INFO L225 Difference]: With dead ends: 12899 [2022-11-22 02:15:07,330 INFO L226 Difference]: Without dead ends: 12897 [2022-11-22 02:15:07,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-22 02:15:07,334 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 168 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:15:07,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 664 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:15:07,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12897 states. [2022-11-22 02:15:09,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12897 to 9328. [2022-11-22 02:15:09,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9328 states, 9327 states have (on average 1.3196097351774418) internal successors, (12308), 9327 states have internal predecessors, (12308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:15:09,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9328 states to 9328 states and 12308 transitions. [2022-11-22 02:15:09,183 INFO L78 Accepts]: Start accepts. Automaton has 9328 states and 12308 transitions. Word has length 95 [2022-11-22 02:15:09,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:15:09,184 INFO L495 AbstractCegarLoop]: Abstraction has 9328 states and 12308 transitions. [2022-11-22 02:15:09,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:15:09,184 INFO L276 IsEmpty]: Start isEmpty. Operand 9328 states and 12308 transitions. [2022-11-22 02:15:09,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-22 02:15:09,186 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:15:09,187 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:15:09,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-22 02:15:09,187 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:15:09,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:15:09,188 INFO L85 PathProgramCache]: Analyzing trace with hash 653774224, now seen corresponding path program 1 times [2022-11-22 02:15:09,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:15:09,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223726811] [2022-11-22 02:15:09,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:15:09,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:15:09,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:15:34,761 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:15:34,761 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:15:34,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223726811] [2022-11-22 02:15:34,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223726811] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:15:34,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607755267] [2022-11-22 02:15:34,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:15:34,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:15:34,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5647f236-04a6-463d-9186-f2025ba86181/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:15:34,775 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5647f236-04a6-463d-9186-f2025ba86181/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:15:34,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5647f236-04a6-463d-9186-f2025ba86181/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 02:15:35,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:15:35,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 99 conjunts are in the unsatisfiable core [2022-11-22 02:15:35,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:16:23,850 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:16:23,850 INFO L328 TraceCheckSpWp]: Computing backward predicates...