./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_484a6ba4-8d23-438a-9dfd-1b2f8f25bacb/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_484a6ba4-8d23-438a-9dfd-1b2f8f25bacb/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_484a6ba4-8d23-438a-9dfd-1b2f8f25bacb/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_484a6ba4-8d23-438a-9dfd-1b2f8f25bacb/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_484a6ba4-8d23-438a-9dfd-1b2f8f25bacb/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_484a6ba4-8d23-438a-9dfd-1b2f8f25bacb/bin/utaipan-TEXQjIfE4P --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 a6374c4e2c0297c3123cfdf0954bdc9362f3fda9d9942785abd7924d756030a0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:21:34,306 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:21:34,309 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:21:34,343 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:21:34,344 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:21:34,345 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:21:34,347 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:21:34,350 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:21:34,352 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:21:34,353 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:21:34,355 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:21:34,356 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:21:34,357 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:21:34,358 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:21:34,360 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:21:34,362 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:21:34,363 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:21:34,364 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:21:34,366 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:21:34,369 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:21:34,371 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:21:34,378 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:21:34,380 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:21:34,381 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:21:34,385 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:21:34,385 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:21:34,386 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:21:34,387 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:21:34,393 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:21:34,395 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:21:34,396 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:21:34,397 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:21:34,399 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:21:34,400 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:21:34,402 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:21:34,402 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:21:34,403 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:21:34,403 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:21:34,403 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:21:34,405 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:21:34,405 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:21:34,406 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_484a6ba4-8d23-438a-9dfd-1b2f8f25bacb/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 01:21:34,455 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:21:34,455 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:21:34,456 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:21:34,456 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:21:34,463 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:21:34,464 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:21:34,464 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:21:34,464 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:21:34,464 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:21:34,464 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:21:34,466 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:21:34,466 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:21:34,466 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:21:34,466 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:21:34,466 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:21:34,467 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:21:34,467 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:21:34,467 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:21:34,468 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:21:34,468 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:21:34,468 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:21:34,469 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:21:34,469 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:21:34,469 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:21:34,469 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:21:34,469 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:21:34,470 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:21:34,470 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:21:34,470 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:21:34,470 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:21:34,470 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:21:34,471 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:21:34,471 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:21:34,471 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:21:34,472 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:21:34,472 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:21:34,472 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:21:34,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:21:34,472 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:21:34,473 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:21:34,473 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:21:34,473 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_484a6ba4-8d23-438a-9dfd-1b2f8f25bacb/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_484a6ba4-8d23-438a-9dfd-1b2f8f25bacb/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a6374c4e2c0297c3123cfdf0954bdc9362f3fda9d9942785abd7924d756030a0 [2021-11-21 01:21:34,730 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:21:34,763 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:21:34,766 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:21:34,767 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:21:34,768 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:21:34,769 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_484a6ba4-8d23-438a-9dfd-1b2f8f25bacb/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-21 01:21:34,844 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_484a6ba4-8d23-438a-9dfd-1b2f8f25bacb/bin/utaipan-TEXQjIfE4P/data/43ad474de/5ddecc4fb51a4d1b9726e4e403eedc96/FLAG26fde8c9f [2021-11-21 01:21:35,404 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:21:35,404 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_484a6ba4-8d23-438a-9dfd-1b2f8f25bacb/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-21 01:21:35,423 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_484a6ba4-8d23-438a-9dfd-1b2f8f25bacb/bin/utaipan-TEXQjIfE4P/data/43ad474de/5ddecc4fb51a4d1b9726e4e403eedc96/FLAG26fde8c9f [2021-11-21 01:21:35,689 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_484a6ba4-8d23-438a-9dfd-1b2f8f25bacb/bin/utaipan-TEXQjIfE4P/data/43ad474de/5ddecc4fb51a4d1b9726e4e403eedc96 [2021-11-21 01:21:35,692 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:21:35,694 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:21:35,697 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:21:35,697 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:21:35,701 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:21:35,702 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:21:35" (1/1) ... [2021-11-21 01:21:35,705 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ba64acb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:21:35, skipping insertion in model container [2021-11-21 01:21:35,706 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:21:35" (1/1) ... [2021-11-21 01:21:35,714 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:21:35,760 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:21:36,055 WARN L230 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_484a6ba4-8d23-438a-9dfd-1b2f8f25bacb/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[9092,9105] [2021-11-21 01:21:36,158 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:21:36,172 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:21:36,259 WARN L230 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_484a6ba4-8d23-438a-9dfd-1b2f8f25bacb/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[9092,9105] [2021-11-21 01:21:36,313 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:21:36,345 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:21:36,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:21:36 WrapperNode [2021-11-21 01:21:36,345 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:21:36,346 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:21:36,346 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:21:36,347 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:21:36,353 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:21:36" (1/1) ... [2021-11-21 01:21:36,366 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:21:36" (1/1) ... [2021-11-21 01:21:36,432 INFO L137 Inliner]: procedures = 26, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 729 [2021-11-21 01:21:36,432 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:21:36,433 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:21:36,433 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:21:36,433 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:21:36,455 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:21:36" (1/1) ... [2021-11-21 01:21:36,455 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:21:36" (1/1) ... [2021-11-21 01:21:36,461 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:21:36" (1/1) ... [2021-11-21 01:21:36,479 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:21:36" (1/1) ... [2021-11-21 01:21:36,491 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:21:36" (1/1) ... [2021-11-21 01:21:36,499 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:21:36" (1/1) ... [2021-11-21 01:21:36,503 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:21:36" (1/1) ... [2021-11-21 01:21:36,509 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:21:36,510 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:21:36,510 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:21:36,510 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:21:36,511 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:21:36" (1/1) ... [2021-11-21 01:21:36,519 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:21:36,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_484a6ba4-8d23-438a-9dfd-1b2f8f25bacb/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:21:36,549 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_484a6ba4-8d23-438a-9dfd-1b2f8f25bacb/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:21:36,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_484a6ba4-8d23-438a-9dfd-1b2f8f25bacb/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:21:36,585 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:21:36,586 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:21:36,586 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:21:36,586 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:21:36,750 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:21:36,752 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:21:37,493 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:21:37,674 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:21:37,674 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-21 01:21:37,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:21:37 BoogieIcfgContainer [2021-11-21 01:21:37,677 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:21:37,679 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:21:37,679 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:21:37,682 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:21:37,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:21:35" (1/3) ... [2021-11-21 01:21:37,701 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21924b2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:21:37, skipping insertion in model container [2021-11-21 01:21:37,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:21:36" (2/3) ... [2021-11-21 01:21:37,702 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21924b2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:21:37, skipping insertion in model container [2021-11-21 01:21:37,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:21:37" (3/3) ... [2021-11-21 01:21:37,703 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-21 01:21:37,709 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:21:37,709 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:21:37,761 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:21:37,768 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 01:21:37,768 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:21:37,787 INFO L276 IsEmpty]: Start isEmpty. Operand has 124 states, 122 states have (on average 1.7704918032786885) internal successors, (216), 123 states have internal predecessors, (216), 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) [2021-11-21 01:21:37,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-21 01:21:37,797 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:21:37,797 INFO L514 BasicCegarLoop]: 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] [2021-11-21 01:21:37,798 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:21:37,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:21:37,804 INFO L85 PathProgramCache]: Analyzing trace with hash -550904145, now seen corresponding path program 1 times [2021-11-21 01:21:37,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:21:37,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287998878] [2021-11-21 01:21:37,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:21:37,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:21:38,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:21:38,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:21:38,214 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:21:38,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287998878] [2021-11-21 01:21:38,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287998878] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:21:38,215 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:21:38,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:21:38,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28876752] [2021-11-21 01:21:38,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:21:38,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:21:38,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:21:38,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:21:38,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:21:38,253 INFO L87 Difference]: Start difference. First operand has 124 states, 122 states have (on average 1.7704918032786885) internal successors, (216), 123 states have internal predecessors, (216), 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 5 states, 5 states have (on average 15.4) internal successors, (77), 4 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) [2021-11-21 01:21:38,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:21:38,535 INFO L93 Difference]: Finished difference Result 207 states and 345 transitions. [2021-11-21 01:21:38,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:21:38,538 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 4 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 [2021-11-21 01:21:38,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:21:38,548 INFO L225 Difference]: With dead ends: 207 [2021-11-21 01:21:38,548 INFO L226 Difference]: Without dead ends: 122 [2021-11-21 01:21:38,551 INFO L932 BasicCegarLoop]: 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 [2021-11-21 01:21:38,555 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 578 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 578 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:21:38,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [578 Valid, 133 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:21:38,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-21 01:21:38,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2021-11-21 01:21:38,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.2148760330578512) internal successors, (147), 121 states have internal predecessors, (147), 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) [2021-11-21 01:21:38,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 147 transitions. [2021-11-21 01:21:38,603 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 147 transitions. Word has length 77 [2021-11-21 01:21:38,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:21:38,604 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 147 transitions. [2021-11-21 01:21:38,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 4 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) [2021-11-21 01:21:38,604 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 147 transitions. [2021-11-21 01:21:38,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-21 01:21:38,607 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:21:38,608 INFO L514 BasicCegarLoop]: 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] [2021-11-21 01:21:38,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:21:38,608 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:21:38,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:21:38,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1336705428, now seen corresponding path program 1 times [2021-11-21 01:21:38,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:21:38,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659693582] [2021-11-21 01:21:38,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:21:38,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:21:38,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:21:38,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:21:38,789 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:21:38,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659693582] [2021-11-21 01:21:38,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659693582] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:21:38,790 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:21:38,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:21:38,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353741229] [2021-11-21 01:21:38,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:21:38,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:21:38,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:21:38,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:21:38,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:21:38,793 INFO L87 Difference]: Start difference. First operand 122 states and 147 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 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) [2021-11-21 01:21:38,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:21:38,944 INFO L93 Difference]: Finished difference Result 183 states and 229 transitions. [2021-11-21 01:21:38,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:21:38,945 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 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 78 [2021-11-21 01:21:38,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:21:38,947 INFO L225 Difference]: With dead ends: 183 [2021-11-21 01:21:38,948 INFO L226 Difference]: Without dead ends: 122 [2021-11-21 01:21:38,948 INFO L932 BasicCegarLoop]: 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 [2021-11-21 01:21:38,950 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 335 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:21:38,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 108 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:21:38,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-21 01:21:38,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2021-11-21 01:21:38,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.1983471074380165) internal successors, (145), 121 states have internal predecessors, (145), 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) [2021-11-21 01:21:38,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 145 transitions. [2021-11-21 01:21:38,995 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 145 transitions. Word has length 78 [2021-11-21 01:21:38,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:21:38,995 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 145 transitions. [2021-11-21 01:21:38,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 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) [2021-11-21 01:21:38,996 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 145 transitions. [2021-11-21 01:21:38,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-21 01:21:39,000 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:21:39,000 INFO L514 BasicCegarLoop]: 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] [2021-11-21 01:21:39,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 01:21:39,001 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:21:39,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:21:39,001 INFO L85 PathProgramCache]: Analyzing trace with hash -520479153, now seen corresponding path program 1 times [2021-11-21 01:21:39,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:21:39,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547297540] [2021-11-21 01:21:39,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:21:39,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:21:39,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:21:39,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:21:39,172 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:21:39,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547297540] [2021-11-21 01:21:39,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547297540] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:21:39,173 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:21:39,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:21:39,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249608022] [2021-11-21 01:21:39,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:21:39,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:21:39,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:21:39,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:21:39,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:21:39,177 INFO L87 Difference]: Start difference. First operand 122 states and 145 transitions. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 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) [2021-11-21 01:21:39,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:21:39,372 INFO L93 Difference]: Finished difference Result 191 states and 235 transitions. [2021-11-21 01:21:39,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:21:39,374 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 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 79 [2021-11-21 01:21:39,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:21:39,377 INFO L225 Difference]: With dead ends: 191 [2021-11-21 01:21:39,381 INFO L226 Difference]: Without dead ends: 122 [2021-11-21 01:21:39,382 INFO L932 BasicCegarLoop]: 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 [2021-11-21 01:21:39,385 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 351 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:21:39,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [351 Valid, 92 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:21:39,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-21 01:21:39,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2021-11-21 01:21:39,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.1818181818181819) internal successors, (143), 121 states have internal predecessors, (143), 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) [2021-11-21 01:21:39,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 143 transitions. [2021-11-21 01:21:39,423 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 143 transitions. Word has length 79 [2021-11-21 01:21:39,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:21:39,427 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 143 transitions. [2021-11-21 01:21:39,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 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) [2021-11-21 01:21:39,428 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 143 transitions. [2021-11-21 01:21:39,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-21 01:21:39,434 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:21:39,435 INFO L514 BasicCegarLoop]: 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] [2021-11-21 01:21:39,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 01:21:39,435 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:21:39,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:21:39,436 INFO L85 PathProgramCache]: Analyzing trace with hash 964193996, now seen corresponding path program 1 times [2021-11-21 01:21:39,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:21:39,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827251631] [2021-11-21 01:21:39,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:21:39,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:21:39,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:21:39,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:21:39,558 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:21:39,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827251631] [2021-11-21 01:21:39,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827251631] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:21:39,558 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:21:39,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:21:39,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919939905] [2021-11-21 01:21:39,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:21:39,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:21:39,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:21:39,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:21:39,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:21:39,561 INFO L87 Difference]: Start difference. First operand 122 states and 143 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 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) [2021-11-21 01:21:39,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:21:39,688 INFO L93 Difference]: Finished difference Result 187 states and 227 transitions. [2021-11-21 01:21:39,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:21:39,689 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 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 [2021-11-21 01:21:39,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:21:39,691 INFO L225 Difference]: With dead ends: 187 [2021-11-21 01:21:39,692 INFO L226 Difference]: Without dead ends: 122 [2021-11-21 01:21:39,695 INFO L932 BasicCegarLoop]: 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 [2021-11-21 01:21:39,704 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 333 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:21:39,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 100 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:21:39,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-21 01:21:39,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2021-11-21 01:21:39,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.165289256198347) internal successors, (141), 121 states have internal predecessors, (141), 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) [2021-11-21 01:21:39,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 141 transitions. [2021-11-21 01:21:39,724 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 141 transitions. Word has length 80 [2021-11-21 01:21:39,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:21:39,726 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 141 transitions. [2021-11-21 01:21:39,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 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) [2021-11-21 01:21:39,727 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 141 transitions. [2021-11-21 01:21:39,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-21 01:21:39,733 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:21:39,733 INFO L514 BasicCegarLoop]: 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] [2021-11-21 01:21:39,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 01:21:39,734 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:21:39,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:21:39,738 INFO L85 PathProgramCache]: Analyzing trace with hash -2056766725, now seen corresponding path program 1 times [2021-11-21 01:21:39,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:21:39,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55132165] [2021-11-21 01:21:39,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:21:39,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:21:39,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:21:39,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:21:39,906 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:21:39,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55132165] [2021-11-21 01:21:39,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55132165] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:21:39,906 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:21:39,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:21:39,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354657131] [2021-11-21 01:21:39,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:21:39,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:21:39,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:21:39,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:21:39,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:21:39,908 INFO L87 Difference]: Start difference. First operand 122 states and 141 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 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) [2021-11-21 01:21:40,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:21:40,031 INFO L93 Difference]: Finished difference Result 195 states and 232 transitions. [2021-11-21 01:21:40,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:21:40,032 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 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 81 [2021-11-21 01:21:40,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:21:40,035 INFO L225 Difference]: With dead ends: 195 [2021-11-21 01:21:40,035 INFO L226 Difference]: Without dead ends: 122 [2021-11-21 01:21:40,035 INFO L932 BasicCegarLoop]: 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 [2021-11-21 01:21:40,043 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 350 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:21:40,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 84 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:21:40,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-21 01:21:40,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2021-11-21 01:21:40,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.1487603305785123) internal successors, (139), 121 states have internal predecessors, (139), 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) [2021-11-21 01:21:40,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 139 transitions. [2021-11-21 01:21:40,065 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 139 transitions. Word has length 81 [2021-11-21 01:21:40,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:21:40,065 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 139 transitions. [2021-11-21 01:21:40,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 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) [2021-11-21 01:21:40,066 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 139 transitions. [2021-11-21 01:21:40,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-21 01:21:40,067 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:21:40,067 INFO L514 BasicCegarLoop]: 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] [2021-11-21 01:21:40,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 01:21:40,067 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:21:40,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:21:40,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1364112964, now seen corresponding path program 1 times [2021-11-21 01:21:40,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:21:40,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477365497] [2021-11-21 01:21:40,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:21:40,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:21:40,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:21:40,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:21:40,221 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:21:40,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477365497] [2021-11-21 01:21:40,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477365497] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:21:40,222 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:21:40,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:21:40,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723121936] [2021-11-21 01:21:40,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:21:40,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:21:40,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:21:40,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:21:40,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:21:40,224 INFO L87 Difference]: Start difference. First operand 122 states and 139 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 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) [2021-11-21 01:21:40,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:21:40,336 INFO L93 Difference]: Finished difference Result 179 states and 212 transitions. [2021-11-21 01:21:40,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:21:40,336 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 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 82 [2021-11-21 01:21:40,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:21:40,338 INFO L225 Difference]: With dead ends: 179 [2021-11-21 01:21:40,338 INFO L226 Difference]: Without dead ends: 122 [2021-11-21 01:21:40,339 INFO L932 BasicCegarLoop]: 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 [2021-11-21 01:21:40,342 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 296 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:21:40,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 116 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:21:40,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-21 01:21:40,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2021-11-21 01:21:40,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.1322314049586777) internal successors, (137), 121 states have internal predecessors, (137), 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) [2021-11-21 01:21:40,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 137 transitions. [2021-11-21 01:21:40,377 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 137 transitions. Word has length 82 [2021-11-21 01:21:40,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:21:40,378 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 137 transitions. [2021-11-21 01:21:40,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 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) [2021-11-21 01:21:40,378 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 137 transitions. [2021-11-21 01:21:40,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-21 01:21:40,379 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:21:40,380 INFO L514 BasicCegarLoop]: 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] [2021-11-21 01:21:40,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-21 01:21:40,380 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:21:40,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:21:40,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1173107989, now seen corresponding path program 1 times [2021-11-21 01:21:40,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:21:40,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498544292] [2021-11-21 01:21:40,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:21:40,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:21:40,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:21:49,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:21:49,895 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:21:49,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498544292] [2021-11-21 01:21:49,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498544292] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:21:49,896 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:21:49,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2021-11-21 01:21:49,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545493096] [2021-11-21 01:21:49,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:21:49,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-21 01:21:49,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:21:49,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-21 01:21:49,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1477, Unknown=0, NotChecked=0, Total=1640 [2021-11-21 01:21:49,901 INFO L87 Difference]: Start difference. First operand 122 states and 137 transitions. Second operand has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 40 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) [2021-11-21 01:22:02,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:22:02,849 INFO L93 Difference]: Finished difference Result 292 states and 363 transitions. [2021-11-21 01:22:02,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-21 01:22:02,849 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 40 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 [2021-11-21 01:22:02,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:22:02,852 INFO L225 Difference]: With dead ends: 292 [2021-11-21 01:22:02,852 INFO L226 Difference]: Without dead ends: 248 [2021-11-21 01:22:02,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 907 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=1281, Invalid=4419, Unknown=0, NotChecked=0, Total=5700 [2021-11-21 01:22:02,855 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 1227 mSDsluCounter, 1156 mSDsCounter, 0 mSdLazyCounter, 2605 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1227 SdHoareTripleChecker+Valid, 1229 SdHoareTripleChecker+Invalid, 2723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 2605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:22:02,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1227 Valid, 1229 Invalid, 2723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 2605 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-11-21 01:22:02,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-11-21 01:22:02,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 161. [2021-11-21 01:22:02,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.18125) internal successors, (189), 160 states have internal predecessors, (189), 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) [2021-11-21 01:22:02,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 189 transitions. [2021-11-21 01:22:02,881 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 189 transitions. Word has length 83 [2021-11-21 01:22:02,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:22:02,882 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 189 transitions. [2021-11-21 01:22:02,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 40 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) [2021-11-21 01:22:02,882 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 189 transitions. [2021-11-21 01:22:02,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-21 01:22:02,883 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:22:02,883 INFO L514 BasicCegarLoop]: 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] [2021-11-21 01:22:02,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-21 01:22:02,884 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:22:02,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:22:02,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1092537058, now seen corresponding path program 1 times [2021-11-21 01:22:02,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:22:02,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307558205] [2021-11-21 01:22:02,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:22:02,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:22:02,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:22:03,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:22:03,022 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:22:03,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307558205] [2021-11-21 01:22:03,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307558205] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:22:03,022 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:22:03,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:22:03,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076507396] [2021-11-21 01:22:03,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:22:03,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:22:03,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:22:03,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:22:03,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:22:03,025 INFO L87 Difference]: Start difference. First operand 161 states and 189 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 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) [2021-11-21 01:22:03,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:22:03,114 INFO L93 Difference]: Finished difference Result 327 states and 411 transitions. [2021-11-21 01:22:03,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:22:03,115 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 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 85 [2021-11-21 01:22:03,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:22:03,117 INFO L225 Difference]: With dead ends: 327 [2021-11-21 01:22:03,117 INFO L226 Difference]: Without dead ends: 244 [2021-11-21 01:22:03,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:22:03,118 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 55 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:22:03,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 360 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:22:03,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-11-21 01:22:03,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 242. [2021-11-21 01:22:03,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 1.2365145228215768) internal successors, (298), 241 states have internal predecessors, (298), 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) [2021-11-21 01:22:03,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 298 transitions. [2021-11-21 01:22:03,155 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 298 transitions. Word has length 85 [2021-11-21 01:22:03,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:22:03,156 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 298 transitions. [2021-11-21 01:22:03,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 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) [2021-11-21 01:22:03,156 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 298 transitions. [2021-11-21 01:22:03,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-21 01:22:03,157 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:22:03,157 INFO L514 BasicCegarLoop]: 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] [2021-11-21 01:22:03,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-21 01:22:03,158 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:22:03,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:22:03,158 INFO L85 PathProgramCache]: Analyzing trace with hash -862371792, now seen corresponding path program 1 times [2021-11-21 01:22:03,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:22:03,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830761278] [2021-11-21 01:22:03,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:22:03,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:22:03,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:22:13,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:22:13,471 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:22:13,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830761278] [2021-11-21 01:22:13,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830761278] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:22:13,471 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:22:13,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2021-11-21 01:22:13,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354609549] [2021-11-21 01:22:13,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:22:13,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-21 01:22:13,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:22:13,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-21 01:22:13,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1806, Unknown=0, NotChecked=0, Total=1980 [2021-11-21 01:22:13,474 INFO L87 Difference]: Start difference. First operand 242 states and 298 transitions. Second operand has 45 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 44 states have internal predecessors, (85), 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) [2021-11-21 01:22:28,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:22:28,371 INFO L93 Difference]: Finished difference Result 491 states and 631 transitions. [2021-11-21 01:22:28,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-21 01:22:28,380 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 44 states have internal predecessors, (85), 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 85 [2021-11-21 01:22:28,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:22:28,382 INFO L225 Difference]: With dead ends: 491 [2021-11-21 01:22:28,382 INFO L226 Difference]: Without dead ends: 327 [2021-11-21 01:22:28,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=1427, Invalid=4425, Unknown=0, NotChecked=0, Total=5852 [2021-11-21 01:22:28,385 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 1018 mSDsluCounter, 1704 mSDsCounter, 0 mSdLazyCounter, 1742 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1018 SdHoareTripleChecker+Valid, 1815 SdHoareTripleChecker+Invalid, 1771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:22:28,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1018 Valid, 1815 Invalid, 1771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1742 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-21 01:22:28,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-11-21 01:22:28,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 325. [2021-11-21 01:22:28,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 1.2592592592592593) internal successors, (408), 324 states have internal predecessors, (408), 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) [2021-11-21 01:22:28,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 408 transitions. [2021-11-21 01:22:28,437 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 408 transitions. Word has length 85 [2021-11-21 01:22:28,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:22:28,437 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 408 transitions. [2021-11-21 01:22:28,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 44 states have internal predecessors, (85), 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) [2021-11-21 01:22:28,438 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 408 transitions. [2021-11-21 01:22:28,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-21 01:22:28,438 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:22:28,439 INFO L514 BasicCegarLoop]: 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] [2021-11-21 01:22:28,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-21 01:22:28,439 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:22:28,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:22:28,440 INFO L85 PathProgramCache]: Analyzing trace with hash -951718606, now seen corresponding path program 1 times [2021-11-21 01:22:28,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:22:28,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045133246] [2021-11-21 01:22:28,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:22:28,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:22:28,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:22:28,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:22:28,535 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:22:28,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045133246] [2021-11-21 01:22:28,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045133246] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:22:28,536 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:22:28,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 01:22:28,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486922388] [2021-11-21 01:22:28,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:22:28,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:22:28,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:22:28,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:22:28,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:22:28,538 INFO L87 Difference]: Start difference. First operand 325 states and 408 transitions. Second operand has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 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) [2021-11-21 01:22:28,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:22:28,776 INFO L93 Difference]: Finished difference Result 635 states and 820 transitions. [2021-11-21 01:22:28,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 01:22:28,776 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 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 [2021-11-21 01:22:28,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:22:28,780 INFO L225 Difference]: With dead ends: 635 [2021-11-21 01:22:28,780 INFO L226 Difference]: Without dead ends: 510 [2021-11-21 01:22:28,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-21 01:22:28,781 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 280 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:22:28,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 703 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:22:28,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-11-21 01:22:28,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 282. [2021-11-21 01:22:28,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 1.2419928825622777) internal successors, (349), 281 states have internal predecessors, (349), 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) [2021-11-21 01:22:28,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 349 transitions. [2021-11-21 01:22:28,833 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 349 transitions. Word has length 86 [2021-11-21 01:22:28,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:22:28,834 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 349 transitions. [2021-11-21 01:22:28,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 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) [2021-11-21 01:22:28,838 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 349 transitions. [2021-11-21 01:22:28,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-21 01:22:28,839 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:22:28,840 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1] [2021-11-21 01:22:28,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-21 01:22:28,840 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:22:28,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:22:28,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1233406620, now seen corresponding path program 1 times [2021-11-21 01:22:28,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:22:28,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266137973] [2021-11-21 01:22:28,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:22:28,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:22:28,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:22:28,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:22:28,938 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:22:28,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266137973] [2021-11-21 01:22:28,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266137973] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:22:28,938 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:22:28,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:22:28,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625419402] [2021-11-21 01:22:28,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:22:28,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:22:28,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:22:28,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:22:28,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:22:28,940 INFO L87 Difference]: Start difference. First operand 282 states and 349 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 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) [2021-11-21 01:22:29,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:22:29,043 INFO L93 Difference]: Finished difference Result 556 states and 713 transitions. [2021-11-21 01:22:29,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:22:29,044 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 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 101 [2021-11-21 01:22:29,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:22:29,046 INFO L225 Difference]: With dead ends: 556 [2021-11-21 01:22:29,047 INFO L226 Difference]: Without dead ends: 352 [2021-11-21 01:22:29,047 INFO L932 BasicCegarLoop]: 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 [2021-11-21 01:22:29,048 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 50 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:22:29,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 278 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:22:29,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-11-21 01:22:29,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 334. [2021-11-21 01:22:29,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 1.2522522522522523) internal successors, (417), 333 states have internal predecessors, (417), 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) [2021-11-21 01:22:29,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 417 transitions. [2021-11-21 01:22:29,107 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 417 transitions. Word has length 101 [2021-11-21 01:22:29,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:22:29,107 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 417 transitions. [2021-11-21 01:22:29,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 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) [2021-11-21 01:22:29,108 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 417 transitions. [2021-11-21 01:22:29,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-21 01:22:29,109 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:22:29,109 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-11-21 01:22:29,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-21 01:22:29,110 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:22:29,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:22:29,111 INFO L85 PathProgramCache]: Analyzing trace with hash 896479471, now seen corresponding path program 1 times [2021-11-21 01:22:29,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:22:29,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433556655] [2021-11-21 01:22:29,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:22:29,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:22:29,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:22:29,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:22:29,183 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:22:29,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433556655] [2021-11-21 01:22:29,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433556655] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:22:29,184 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:22:29,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:22:29,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297313472] [2021-11-21 01:22:29,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:22:29,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:22:29,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:22:29,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:22:29,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:22:29,186 INFO L87 Difference]: Start difference. First operand 334 states and 417 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 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) [2021-11-21 01:22:29,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:22:29,313 INFO L93 Difference]: Finished difference Result 758 states and 983 transitions. [2021-11-21 01:22:29,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:22:29,313 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 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 104 [2021-11-21 01:22:29,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:22:29,317 INFO L225 Difference]: With dead ends: 758 [2021-11-21 01:22:29,317 INFO L226 Difference]: Without dead ends: 506 [2021-11-21 01:22:29,318 INFO L932 BasicCegarLoop]: 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 [2021-11-21 01:22:29,319 INFO L933 BasicCegarLoop]: 154 mSDtfsCounter, 45 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:22:29,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 272 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:22:29,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-11-21 01:22:29,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 480. [2021-11-21 01:22:29,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 1.2755741127348643) internal successors, (611), 479 states have internal predecessors, (611), 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) [2021-11-21 01:22:29,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 611 transitions. [2021-11-21 01:22:29,403 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 611 transitions. Word has length 104 [2021-11-21 01:22:29,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:22:29,404 INFO L470 AbstractCegarLoop]: Abstraction has 480 states and 611 transitions. [2021-11-21 01:22:29,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 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) [2021-11-21 01:22:29,404 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 611 transitions. [2021-11-21 01:22:29,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-21 01:22:29,406 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:22:29,406 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:22:29,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-21 01:22:29,406 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:22:29,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:22:29,407 INFO L85 PathProgramCache]: Analyzing trace with hash -986336498, now seen corresponding path program 1 times [2021-11-21 01:22:29,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:22:29,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166452265] [2021-11-21 01:22:29,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:22:29,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:22:29,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:22:29,488 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:22:29,488 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:22:29,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166452265] [2021-11-21 01:22:29,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166452265] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:22:29,489 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:22:29,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:22:29,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209282806] [2021-11-21 01:22:29,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:22:29,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:22:29,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:22:29,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:22:29,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:22:29,491 INFO L87 Difference]: Start difference. First operand 480 states and 611 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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) [2021-11-21 01:22:29,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:22:29,665 INFO L93 Difference]: Finished difference Result 1214 states and 1589 transitions. [2021-11-21 01:22:29,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:22:29,665 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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 107 [2021-11-21 01:22:29,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:22:29,670 INFO L225 Difference]: With dead ends: 1214 [2021-11-21 01:22:29,670 INFO L226 Difference]: Without dead ends: 816 [2021-11-21 01:22:29,671 INFO L932 BasicCegarLoop]: 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 [2021-11-21 01:22:29,672 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 40 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:22:29,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 265 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:22:29,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2021-11-21 01:22:29,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 778. [2021-11-21 01:22:29,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 777 states have (on average 1.2934362934362935) internal successors, (1005), 777 states have internal predecessors, (1005), 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) [2021-11-21 01:22:29,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 1005 transitions. [2021-11-21 01:22:29,808 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 1005 transitions. Word has length 107 [2021-11-21 01:22:29,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:22:29,809 INFO L470 AbstractCegarLoop]: Abstraction has 778 states and 1005 transitions. [2021-11-21 01:22:29,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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) [2021-11-21 01:22:29,809 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 1005 transitions. [2021-11-21 01:22:29,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-21 01:22:29,812 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:22:29,812 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:22:29,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-21 01:22:29,812 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:22:29,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:22:29,813 INFO L85 PathProgramCache]: Analyzing trace with hash -925104678, now seen corresponding path program 1 times [2021-11-21 01:22:29,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:22:29,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263131865] [2021-11-21 01:22:29,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:22:29,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:22:29,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:22:29,891 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:22:29,891 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:22:29,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263131865] [2021-11-21 01:22:29,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263131865] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:22:29,892 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:22:29,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:22:29,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242075107] [2021-11-21 01:22:29,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:22:29,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:22:29,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:22:29,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:22:29,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:22:29,894 INFO L87 Difference]: Start difference. First operand 778 states and 1005 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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) [2021-11-21 01:22:30,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:22:30,160 INFO L93 Difference]: Finished difference Result 2126 states and 2795 transitions. [2021-11-21 01:22:30,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:22:30,160 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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 110 [2021-11-21 01:22:30,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:22:30,169 INFO L225 Difference]: With dead ends: 2126 [2021-11-21 01:22:30,169 INFO L226 Difference]: Without dead ends: 1430 [2021-11-21 01:22:30,171 INFO L932 BasicCegarLoop]: 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 [2021-11-21 01:22:30,172 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 35 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:22:30,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 258 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:22:30,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1430 states. [2021-11-21 01:22:30,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1430 to 1368. [2021-11-21 01:22:30,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1368 states, 1367 states have (on average 1.3028529626920264) internal successors, (1781), 1367 states have internal predecessors, (1781), 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) [2021-11-21 01:22:30,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 1781 transitions. [2021-11-21 01:22:30,421 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 1781 transitions. Word has length 110 [2021-11-21 01:22:30,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:22:30,421 INFO L470 AbstractCegarLoop]: Abstraction has 1368 states and 1781 transitions. [2021-11-21 01:22:30,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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) [2021-11-21 01:22:30,422 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 1781 transitions. [2021-11-21 01:22:30,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-21 01:22:30,423 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:22:30,423 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:22:30,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-21 01:22:30,423 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:22:30,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:22:30,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1140135598, now seen corresponding path program 1 times [2021-11-21 01:22:30,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:22:30,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342278632] [2021-11-21 01:22:30,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:22:30,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:22:30,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:22:30,493 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:22:30,493 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:22:30,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342278632] [2021-11-21 01:22:30,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342278632] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:22:30,494 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:22:30,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:22:30,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350926680] [2021-11-21 01:22:30,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:22:30,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:22:30,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:22:30,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:22:30,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:22:30,496 INFO L87 Difference]: Start difference. First operand 1368 states and 1781 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 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) [2021-11-21 01:22:31,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:22:31,007 INFO L93 Difference]: Finished difference Result 3914 states and 5147 transitions. [2021-11-21 01:22:31,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:22:31,008 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 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 113 [2021-11-21 01:22:31,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:22:31,023 INFO L225 Difference]: With dead ends: 3914 [2021-11-21 01:22:31,023 INFO L226 Difference]: Without dead ends: 2628 [2021-11-21 01:22:31,027 INFO L932 BasicCegarLoop]: 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 [2021-11-21 01:22:31,028 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 30 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:22:31,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 251 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:22:31,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2628 states. [2021-11-21 01:22:31,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2628 to 2518. [2021-11-21 01:22:31,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2518 states, 2517 states have (on average 1.3051251489868891) internal successors, (3285), 2517 states have internal predecessors, (3285), 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) [2021-11-21 01:22:31,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2518 states to 2518 states and 3285 transitions. [2021-11-21 01:22:31,518 INFO L78 Accepts]: Start accepts. Automaton has 2518 states and 3285 transitions. Word has length 113 [2021-11-21 01:22:31,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:22:31,518 INFO L470 AbstractCegarLoop]: Abstraction has 2518 states and 3285 transitions. [2021-11-21 01:22:31,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 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) [2021-11-21 01:22:31,519 INFO L276 IsEmpty]: Start isEmpty. Operand 2518 states and 3285 transitions. [2021-11-21 01:22:31,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-21 01:22:31,520 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:22:31,520 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:22:31,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-21 01:22:31,521 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:22:31,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:22:31,521 INFO L85 PathProgramCache]: Analyzing trace with hash -486706201, now seen corresponding path program 1 times [2021-11-21 01:22:31,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:22:31,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30813254] [2021-11-21 01:22:31,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:22:31,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:22:31,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:22:31,598 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:22:31,598 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:22:31,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30813254] [2021-11-21 01:22:31,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30813254] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:22:31,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:22:31,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:22:31,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721378254] [2021-11-21 01:22:31,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:22:31,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:22:31,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:22:31,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:22:31,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:22:31,603 INFO L87 Difference]: Start difference. First operand 2518 states and 3285 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 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) [2021-11-21 01:22:32,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:22:32,563 INFO L93 Difference]: Finished difference Result 7382 states and 9683 transitions. [2021-11-21 01:22:32,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:22:32,564 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 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 116 [2021-11-21 01:22:32,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:22:32,595 INFO L225 Difference]: With dead ends: 7382 [2021-11-21 01:22:32,595 INFO L226 Difference]: Without dead ends: 4946 [2021-11-21 01:22:32,601 INFO L932 BasicCegarLoop]: 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 [2021-11-21 01:22:32,602 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 25 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:22:32,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 240 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:22:32,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4946 states. [2021-11-21 01:22:33,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4946 to 4740. [2021-11-21 01:22:33,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4740 states, 4739 states have (on average 1.3025954842793839) internal successors, (6173), 4739 states have internal predecessors, (6173), 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) [2021-11-21 01:22:33,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4740 states to 4740 states and 6173 transitions. [2021-11-21 01:22:33,410 INFO L78 Accepts]: Start accepts. Automaton has 4740 states and 6173 transitions. Word has length 116 [2021-11-21 01:22:33,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:22:33,411 INFO L470 AbstractCegarLoop]: Abstraction has 4740 states and 6173 transitions. [2021-11-21 01:22:33,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 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) [2021-11-21 01:22:33,411 INFO L276 IsEmpty]: Start isEmpty. Operand 4740 states and 6173 transitions. [2021-11-21 01:22:33,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-21 01:22:33,413 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:22:33,414 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:22:33,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-21 01:22:33,414 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:22:33,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:22:33,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1330629509, now seen corresponding path program 1 times [2021-11-21 01:22:33,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:22:33,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570205638] [2021-11-21 01:22:33,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:22:33,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:22:33,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:24:46,243 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:24:46,243 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:24:46,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570205638] [2021-11-21 01:24:46,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570205638] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:24:46,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917020361] [2021-11-21 01:24:46,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:24:46,244 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:24:46,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_484a6ba4-8d23-438a-9dfd-1b2f8f25bacb/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:24:46,245 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_484a6ba4-8d23-438a-9dfd-1b2f8f25bacb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:24:46,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_484a6ba4-8d23-438a-9dfd-1b2f8f25bacb/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:24:46,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:24:46,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 637 conjuncts, 164 conjunts are in the unsatisfiable core [2021-11-21 01:24:46,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:27:23,684 WARN L227 SmtUtils]: Spent 5.49s on a formula simplification that was a NOOP. DAG size: 215 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)