./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.BOUNDED-10.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_63c3d3cb-44a7-4362-9aa5-1a3e02945284/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c3d3cb-44a7-4362-9aa5-1a3e02945284/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_63c3d3cb-44a7-4362-9aa5-1a3e02945284/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c3d3cb-44a7-4362-9aa5-1a3e02945284/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c3d3cb-44a7-4362-9aa5-1a3e02945284/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_63c3d3cb-44a7-4362-9aa5-1a3e02945284/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 ccd47f3526eef69b5bf2f51fee8d66c64e4c81e1dda46c7d333fbe79bb4350dd --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:32:00,250 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:32:00,253 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:32:00,308 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:32:00,309 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:32:00,313 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:32:00,314 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:32:00,318 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:32:00,321 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:32:00,328 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:32:00,329 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:32:00,331 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:32:00,332 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:32:00,334 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:32:00,336 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:32:00,337 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:32:00,338 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:32:00,339 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:32:00,341 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:32:00,344 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:32:00,345 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:32:00,347 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:32:00,350 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:32:00,351 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:32:00,357 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:32:00,363 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:32:00,364 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:32:00,365 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:32:00,367 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:32:00,368 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:32:00,369 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:32:00,370 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:32:00,372 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:32:00,373 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:32:00,374 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:32:00,375 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:32:00,375 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:32:00,376 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:32:00,376 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:32:00,377 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:32:00,378 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:32:00,379 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c3d3cb-44a7-4362-9aa5-1a3e02945284/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 01:32:00,430 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:32:00,431 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:32:00,431 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:32:00,431 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:32:00,433 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:32:00,439 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:32:00,439 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:32:00,439 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:32:00,440 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:32:00,440 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:32:00,441 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:32:00,441 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:32:00,441 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:32:00,442 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:32:00,442 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:32:00,442 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:32:00,442 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:32:00,443 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:32:00,445 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:32:00,445 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:32:00,445 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:32:00,445 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:32:00,446 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:32:00,446 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:32:00,446 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:32:00,446 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:32:00,448 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:32:00,448 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:32:00,448 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:32:00,448 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:32:00,449 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:32:00,449 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:32:00,449 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:32:00,450 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:32:00,450 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:32:00,450 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:32:00,450 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:32:00,451 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:32:00,451 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:32:00,451 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:32:00,451 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:32:00,451 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_63c3d3cb-44a7-4362-9aa5-1a3e02945284/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c3d3cb-44a7-4362-9aa5-1a3e02945284/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ccd47f3526eef69b5bf2f51fee8d66c64e4c81e1dda46c7d333fbe79bb4350dd [2021-11-21 01:32:00,712 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:32:00,739 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:32:00,742 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:32:00,744 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:32:00,744 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:32:00,746 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c3d3cb-44a7-4362-9aa5-1a3e02945284/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2021-11-21 01:32:00,819 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c3d3cb-44a7-4362-9aa5-1a3e02945284/bin/utaipan-TEXQjIfE4P/data/2ded01c64/53bc648a4e2f4912ae686fed9d8405c6/FLAGcb03a2dae [2021-11-21 01:32:01,366 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:32:01,367 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c3d3cb-44a7-4362-9aa5-1a3e02945284/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2021-11-21 01:32:01,386 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c3d3cb-44a7-4362-9aa5-1a3e02945284/bin/utaipan-TEXQjIfE4P/data/2ded01c64/53bc648a4e2f4912ae686fed9d8405c6/FLAGcb03a2dae [2021-11-21 01:32:01,698 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c3d3cb-44a7-4362-9aa5-1a3e02945284/bin/utaipan-TEXQjIfE4P/data/2ded01c64/53bc648a4e2f4912ae686fed9d8405c6 [2021-11-21 01:32:01,700 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:32:01,702 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:32:01,703 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:32:01,704 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:32:01,707 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:32:01,708 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:32:01" (1/1) ... [2021-11-21 01:32:01,709 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7280946f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:32:01, skipping insertion in model container [2021-11-21 01:32:01,709 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:32:01" (1/1) ... [2021-11-21 01:32:01,716 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:32:01,789 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:32:02,061 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_63c3d3cb-44a7-4362-9aa5-1a3e02945284/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c[8609,8622] [2021-11-21 01:32:02,132 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:32:02,145 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:32:02,235 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_63c3d3cb-44a7-4362-9aa5-1a3e02945284/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c[8609,8622] [2021-11-21 01:32:02,304 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:32:02,336 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:32:02,336 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:32:02 WrapperNode [2021-11-21 01:32:02,336 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:32:02,337 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:32:02,337 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:32:02,337 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:32:02,345 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:32:02" (1/1) ... [2021-11-21 01:32:02,360 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:32:02" (1/1) ... [2021-11-21 01:32:02,413 INFO L137 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 805 [2021-11-21 01:32:02,413 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:32:02,414 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:32:02,414 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:32:02,414 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:32:02,423 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:32:02" (1/1) ... [2021-11-21 01:32:02,423 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:32:02" (1/1) ... [2021-11-21 01:32:02,429 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:32:02" (1/1) ... [2021-11-21 01:32:02,429 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:32:02" (1/1) ... [2021-11-21 01:32:02,443 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:32:02" (1/1) ... [2021-11-21 01:32:02,451 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:32:02" (1/1) ... [2021-11-21 01:32:02,456 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:32:02" (1/1) ... [2021-11-21 01:32:02,463 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:32:02,474 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:32:02,474 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:32:02,474 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:32:02,475 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:32:02" (1/1) ... [2021-11-21 01:32:02,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:32:02,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c3d3cb-44a7-4362-9aa5-1a3e02945284/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:32:02,515 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c3d3cb-44a7-4362-9aa5-1a3e02945284/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:32:02,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63c3d3cb-44a7-4362-9aa5-1a3e02945284/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:32:02,556 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:32:02,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:32:02,556 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:32:02,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:32:02,703 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:32:02,704 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:32:03,539 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:32:03,704 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:32:03,704 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-21 01:32:03,707 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:32:03 BoogieIcfgContainer [2021-11-21 01:32:03,708 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:32:03,710 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:32:03,711 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:32:03,714 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:32:03,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:32:01" (1/3) ... [2021-11-21 01:32:03,715 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1435924d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:32:03, skipping insertion in model container [2021-11-21 01:32:03,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:32:02" (2/3) ... [2021-11-21 01:32:03,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1435924d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:32:03, skipping insertion in model container [2021-11-21 01:32:03,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:32:03" (3/3) ... [2021-11-21 01:32:03,717 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2021-11-21 01:32:03,723 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:32:03,723 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:32:03,767 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:32:03,774 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 01:32:03,774 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:32:03,793 INFO L276 IsEmpty]: Start isEmpty. Operand has 165 states, 163 states have (on average 1.705521472392638) internal successors, (278), 164 states have internal predecessors, (278), 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 01:32:03,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-21 01:32:03,802 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:32:03,803 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] [2021-11-21 01:32:03,803 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:32:03,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:32:03,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1895216757, now seen corresponding path program 1 times [2021-11-21 01:32:03,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:32:03,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120993629] [2021-11-21 01:32:03,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:32:03,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:32:04,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:32:04,372 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 01:32:04,372 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:32:04,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120993629] [2021-11-21 01:32:04,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120993629] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:32:04,373 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:32:04,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-21 01:32:04,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910540144] [2021-11-21 01:32:04,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:32:04,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:32:04,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:32:04,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:32:04,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:32:04,409 INFO L87 Difference]: Start difference. First operand has 165 states, 163 states have (on average 1.705521472392638) internal successors, (278), 164 states have internal predecessors, (278), 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 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 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 01:32:04,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:32:04,786 INFO L93 Difference]: Finished difference Result 577 states and 924 transitions. [2021-11-21 01:32:04,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:32:04,796 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 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 68 [2021-11-21 01:32:04,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:32:04,817 INFO L225 Difference]: With dead ends: 577 [2021-11-21 01:32:04,821 INFO L226 Difference]: Without dead ends: 480 [2021-11-21 01:32:04,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:32:04,829 INFO L933 BasicCegarLoop]: 594 mSDtfsCounter, 870 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 870 SdHoareTripleChecker+Valid, 1146 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:32:04,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [870 Valid, 1146 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 01:32:04,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-11-21 01:32:04,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 472. [2021-11-21 01:32:04,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 1.40552016985138) internal successors, (662), 471 states have internal predecessors, (662), 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 01:32:04,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 662 transitions. [2021-11-21 01:32:04,953 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 662 transitions. Word has length 68 [2021-11-21 01:32:04,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:32:04,954 INFO L470 AbstractCegarLoop]: Abstraction has 472 states and 662 transitions. [2021-11-21 01:32:04,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 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 01:32:04,955 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 662 transitions. [2021-11-21 01:32:04,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-21 01:32:04,963 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:32:04,963 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] [2021-11-21 01:32:04,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:32:04,963 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:32:04,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:32:04,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1130513446, now seen corresponding path program 1 times [2021-11-21 01:32:04,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:32:04,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410418595] [2021-11-21 01:32:04,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:32:04,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:32:05,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:32:05,127 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 01:32:05,127 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:32:05,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410418595] [2021-11-21 01:32:05,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410418595] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:32:05,128 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:32:05,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:32:05,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045807086] [2021-11-21 01:32:05,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:32:05,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:32:05,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:32:05,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:32:05,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:32:05,131 INFO L87 Difference]: Start difference. First operand 472 states and 662 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 01:32:05,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:32:05,469 INFO L93 Difference]: Finished difference Result 1132 states and 1626 transitions. [2021-11-21 01:32:05,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:32:05,470 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 69 [2021-11-21 01:32:05,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:32:05,476 INFO L225 Difference]: With dead ends: 1132 [2021-11-21 01:32:05,477 INFO L226 Difference]: Without dead ends: 702 [2021-11-21 01:32:05,488 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 01:32:05,490 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 595 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 595 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:32:05,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [595 Valid, 224 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:32:05,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2021-11-21 01:32:05,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 700. [2021-11-21 01:32:05,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 699 states have (on average 1.4291845493562232) internal successors, (999), 699 states have internal predecessors, (999), 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 01:32:05,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 999 transitions. [2021-11-21 01:32:05,567 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 999 transitions. Word has length 69 [2021-11-21 01:32:05,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:32:05,568 INFO L470 AbstractCegarLoop]: Abstraction has 700 states and 999 transitions. [2021-11-21 01:32:05,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 01:32:05,568 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 999 transitions. [2021-11-21 01:32:05,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-21 01:32:05,571 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:32:05,571 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] [2021-11-21 01:32:05,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 01:32:05,572 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:32:05,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:32:05,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1751724597, now seen corresponding path program 1 times [2021-11-21 01:32:05,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:32:05,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842040637] [2021-11-21 01:32:05,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:32:05,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:32:05,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:32:05,701 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 01:32:05,701 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:32:05,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842040637] [2021-11-21 01:32:05,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842040637] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:32:05,703 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:32:05,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:32:05,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075994292] [2021-11-21 01:32:05,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:32:05,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:32:05,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:32:05,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:32:05,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:32:05,707 INFO L87 Difference]: Start difference. First operand 700 states and 999 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 01:32:06,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:32:06,067 INFO L93 Difference]: Finished difference Result 1847 states and 2690 transitions. [2021-11-21 01:32:06,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:32:06,067 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 69 [2021-11-21 01:32:06,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:32:06,077 INFO L225 Difference]: With dead ends: 1847 [2021-11-21 01:32:06,077 INFO L226 Difference]: Without dead ends: 1205 [2021-11-21 01:32:06,078 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 01:32:06,086 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 578 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 578 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:32:06,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [578 Valid, 232 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:32:06,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1205 states. [2021-11-21 01:32:06,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1205 to 1203. [2021-11-21 01:32:06,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1203 states, 1202 states have (on average 1.4467554076539102) internal successors, (1739), 1202 states have internal predecessors, (1739), 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 01:32:06,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1203 states to 1203 states and 1739 transitions. [2021-11-21 01:32:06,213 INFO L78 Accepts]: Start accepts. Automaton has 1203 states and 1739 transitions. Word has length 69 [2021-11-21 01:32:06,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:32:06,213 INFO L470 AbstractCegarLoop]: Abstraction has 1203 states and 1739 transitions. [2021-11-21 01:32:06,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 01:32:06,214 INFO L276 IsEmpty]: Start isEmpty. Operand 1203 states and 1739 transitions. [2021-11-21 01:32:06,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-21 01:32:06,215 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:32:06,216 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] [2021-11-21 01:32:06,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 01:32:06,216 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:32:06,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:32:06,217 INFO L85 PathProgramCache]: Analyzing trace with hash 128283268, now seen corresponding path program 1 times [2021-11-21 01:32:06,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:32:06,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756369469] [2021-11-21 01:32:06,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:32:06,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:32:06,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:32:06,344 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 01:32:06,344 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:32:06,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756369469] [2021-11-21 01:32:06,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756369469] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:32:06,345 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:32:06,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:32:06,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246419515] [2021-11-21 01:32:06,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:32:06,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:32:06,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:32:06,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:32:06,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:32:06,347 INFO L87 Difference]: Start difference. First operand 1203 states and 1739 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 01:32:06,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:32:06,761 INFO L93 Difference]: Finished difference Result 3333 states and 4883 transitions. [2021-11-21 01:32:06,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:32:06,761 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 69 [2021-11-21 01:32:06,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:32:06,775 INFO L225 Difference]: With dead ends: 3333 [2021-11-21 01:32:06,775 INFO L226 Difference]: Without dead ends: 2211 [2021-11-21 01:32:06,777 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 01:32:06,779 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 561 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:32:06,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [561 Valid, 240 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:32:06,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2211 states. [2021-11-21 01:32:06,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2211 to 2209. [2021-11-21 01:32:06,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2209 states, 2208 states have (on average 1.453804347826087) internal successors, (3210), 2208 states have internal predecessors, (3210), 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 01:32:07,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2209 states to 2209 states and 3210 transitions. [2021-11-21 01:32:07,003 INFO L78 Accepts]: Start accepts. Automaton has 2209 states and 3210 transitions. Word has length 69 [2021-11-21 01:32:07,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:32:07,003 INFO L470 AbstractCegarLoop]: Abstraction has 2209 states and 3210 transitions. [2021-11-21 01:32:07,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 01:32:07,004 INFO L276 IsEmpty]: Start isEmpty. Operand 2209 states and 3210 transitions. [2021-11-21 01:32:07,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-21 01:32:07,005 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:32:07,005 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] [2021-11-21 01:32:07,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 01:32:07,006 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:32:07,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:32:07,006 INFO L85 PathProgramCache]: Analyzing trace with hash 864126227, now seen corresponding path program 1 times [2021-11-21 01:32:07,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:32:07,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642716004] [2021-11-21 01:32:07,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:32:07,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:32:07,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:32:07,076 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 01:32:07,077 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:32:07,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642716004] [2021-11-21 01:32:07,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642716004] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:32:07,077 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:32:07,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:32:07,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455039745] [2021-11-21 01:32:07,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:32:07,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:32:07,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:32:07,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:32:07,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:32:07,080 INFO L87 Difference]: Start difference. First operand 2209 states and 3210 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 01:32:07,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:32:07,670 INFO L93 Difference]: Finished difference Result 6321 states and 9261 transitions. [2021-11-21 01:32:07,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:32:07,670 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 69 [2021-11-21 01:32:07,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:32:07,696 INFO L225 Difference]: With dead ends: 6321 [2021-11-21 01:32:07,696 INFO L226 Difference]: Without dead ends: 4223 [2021-11-21 01:32:07,701 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 01:32:07,702 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 544 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:32:07,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [544 Valid, 248 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:32:07,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4223 states. [2021-11-21 01:32:08,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4223 to 4221. [2021-11-21 01:32:08,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4221 states, 4220 states have (on average 1.454265402843602) internal successors, (6137), 4220 states have internal predecessors, (6137), 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 01:32:08,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4221 states to 4221 states and 6137 transitions. [2021-11-21 01:32:08,111 INFO L78 Accepts]: Start accepts. Automaton has 4221 states and 6137 transitions. Word has length 69 [2021-11-21 01:32:08,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:32:08,113 INFO L470 AbstractCegarLoop]: Abstraction has 4221 states and 6137 transitions. [2021-11-21 01:32:08,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 01:32:08,114 INFO L276 IsEmpty]: Start isEmpty. Operand 4221 states and 6137 transitions. [2021-11-21 01:32:08,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-21 01:32:08,120 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:32:08,121 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] [2021-11-21 01:32:08,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 01:32:08,122 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:32:08,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:32:08,122 INFO L85 PathProgramCache]: Analyzing trace with hash -229119518, now seen corresponding path program 1 times [2021-11-21 01:32:08,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:32:08,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70528925] [2021-11-21 01:32:08,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:32:08,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:32:08,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:32:08,229 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 01:32:08,229 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:32:08,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70528925] [2021-11-21 01:32:08,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70528925] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:32:08,230 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:32:08,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:32:08,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846478622] [2021-11-21 01:32:08,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:32:08,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:32:08,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:32:08,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:32:08,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:32:08,232 INFO L87 Difference]: Start difference. First operand 4221 states and 6137 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 01:32:09,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:32:09,165 INFO L93 Difference]: Finished difference Result 12323 states and 18005 transitions. [2021-11-21 01:32:09,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:32:09,165 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 69 [2021-11-21 01:32:09,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:32:09,214 INFO L225 Difference]: With dead ends: 12323 [2021-11-21 01:32:09,214 INFO L226 Difference]: Without dead ends: 8247 [2021-11-21 01:32:09,221 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 01:32:09,222 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 562 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:32:09,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [562 Valid, 249 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:32:09,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8247 states. [2021-11-21 01:32:09,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8247 to 8245. [2021-11-21 01:32:09,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8245 states, 8244 states have (on average 1.4517224648229015) internal successors, (11968), 8244 states have internal predecessors, (11968), 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 01:32:10,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8245 states to 8245 states and 11968 transitions. [2021-11-21 01:32:10,017 INFO L78 Accepts]: Start accepts. Automaton has 8245 states and 11968 transitions. Word has length 69 [2021-11-21 01:32:10,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:32:10,018 INFO L470 AbstractCegarLoop]: Abstraction has 8245 states and 11968 transitions. [2021-11-21 01:32:10,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 01:32:10,019 INFO L276 IsEmpty]: Start isEmpty. Operand 8245 states and 11968 transitions. [2021-11-21 01:32:10,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-21 01:32:10,022 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:32:10,022 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] [2021-11-21 01:32:10,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-21 01:32:10,023 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:32:10,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:32:10,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1054037609, now seen corresponding path program 1 times [2021-11-21 01:32:10,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:32:10,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016954176] [2021-11-21 01:32:10,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:32:10,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:32:10,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:32:10,972 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 01:32:10,972 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:32:10,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016954176] [2021-11-21 01:32:10,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016954176] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:32:10,973 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:32:10,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-21 01:32:10,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735932707] [2021-11-21 01:32:10,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:32:10,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-21 01:32:10,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:32:10,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-21 01:32:10,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-11-21 01:32:10,975 INFO L87 Difference]: Start difference. First operand 8245 states and 11968 transitions. Second operand has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 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 01:32:14,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:32:14,142 INFO L93 Difference]: Finished difference Result 21194 states and 30743 transitions. [2021-11-21 01:32:14,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-21 01:32:14,142 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 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 70 [2021-11-21 01:32:14,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:32:14,221 INFO L225 Difference]: With dead ends: 21194 [2021-11-21 01:32:14,221 INFO L226 Difference]: Without dead ends: 21192 [2021-11-21 01:32:14,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=250, Invalid=680, Unknown=0, NotChecked=0, Total=930 [2021-11-21 01:32:14,229 INFO L933 BasicCegarLoop]: 253 mSDtfsCounter, 1005 mSDsluCounter, 1504 mSDsCounter, 0 mSdLazyCounter, 1024 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1005 SdHoareTripleChecker+Valid, 1748 SdHoareTripleChecker+Invalid, 1053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1024 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:32:14,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1005 Valid, 1748 Invalid, 1053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1024 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-21 01:32:14,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21192 states. [2021-11-21 01:32:15,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21192 to 16316. [2021-11-21 01:32:15,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16316 states, 16315 states have (on average 1.446399019307386) internal successors, (23598), 16315 states have internal predecessors, (23598), 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 01:32:15,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16316 states to 16316 states and 23598 transitions. [2021-11-21 01:32:15,792 INFO L78 Accepts]: Start accepts. Automaton has 16316 states and 23598 transitions. Word has length 70 [2021-11-21 01:32:15,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:32:15,793 INFO L470 AbstractCegarLoop]: Abstraction has 16316 states and 23598 transitions. [2021-11-21 01:32:15,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 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 01:32:15,794 INFO L276 IsEmpty]: Start isEmpty. Operand 16316 states and 23598 transitions. [2021-11-21 01:32:15,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-21 01:32:15,795 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:32:15,795 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] [2021-11-21 01:32:15,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-21 01:32:15,796 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:32:15,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:32:15,796 INFO L85 PathProgramCache]: Analyzing trace with hash 733422153, now seen corresponding path program 1 times [2021-11-21 01:32:15,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:32:15,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705720446] [2021-11-21 01:32:15,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:32:15,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:32:15,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:32:16,661 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 01:32:16,661 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:32:16,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705720446] [2021-11-21 01:32:16,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705720446] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:32:16,662 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:32:16,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-21 01:32:16,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683738911] [2021-11-21 01:32:16,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:32:16,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-21 01:32:16,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:32:16,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-21 01:32:16,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-11-21 01:32:16,663 INFO L87 Difference]: Start difference. First operand 16316 states and 23598 transitions. Second operand has 20 states, 20 states have (on average 3.5) internal successors, (70), 20 states have internal predecessors, (70), 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 01:32:19,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:32:19,224 INFO L93 Difference]: Finished difference Result 28560 states and 41357 transitions. [2021-11-21 01:32:19,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-21 01:32:19,225 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.5) internal successors, (70), 20 states have internal predecessors, (70), 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 70 [2021-11-21 01:32:19,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:32:19,284 INFO L225 Difference]: With dead ends: 28560 [2021-11-21 01:32:19,284 INFO L226 Difference]: Without dead ends: 22862 [2021-11-21 01:32:19,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=311, Invalid=879, Unknown=0, NotChecked=0, Total=1190 [2021-11-21 01:32:19,301 INFO L933 BasicCegarLoop]: 330 mSDtfsCounter, 1005 mSDsluCounter, 1849 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1005 SdHoareTripleChecker+Valid, 2149 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:32:19,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1005 Valid, 2149 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-21 01:32:19,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22862 states. [2021-11-21 01:32:20,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22862 to 19749. [2021-11-21 01:32:20,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19749 states, 19748 states have (on average 1.438424144217136) internal successors, (28406), 19748 states have internal predecessors, (28406), 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 01:32:20,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19749 states to 19749 states and 28406 transitions. [2021-11-21 01:32:20,974 INFO L78 Accepts]: Start accepts. Automaton has 19749 states and 28406 transitions. Word has length 70 [2021-11-21 01:32:20,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:32:20,975 INFO L470 AbstractCegarLoop]: Abstraction has 19749 states and 28406 transitions. [2021-11-21 01:32:20,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.5) internal successors, (70), 20 states have internal predecessors, (70), 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 01:32:20,975 INFO L276 IsEmpty]: Start isEmpty. Operand 19749 states and 28406 transitions. [2021-11-21 01:32:20,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-21 01:32:20,977 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:32:20,977 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] [2021-11-21 01:32:20,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-21 01:32:20,977 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:32:20,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:32:20,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1747306967, now seen corresponding path program 1 times [2021-11-21 01:32:20,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:32:20,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397494646] [2021-11-21 01:32:20,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:32:20,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:32:21,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:32:21,629 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 01:32:21,629 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:32:21,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397494646] [2021-11-21 01:32:21,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397494646] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:32:21,629 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:32:21,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-21 01:32:21,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212771837] [2021-11-21 01:32:21,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:32:21,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-21 01:32:21,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:32:21,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-21 01:32:21,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-11-21 01:32:21,631 INFO L87 Difference]: Start difference. First operand 19749 states and 28406 transitions. Second operand has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 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 01:32:24,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:32:24,589 INFO L93 Difference]: Finished difference Result 27394 states and 39420 transitions. [2021-11-21 01:32:24,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-21 01:32:24,590 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 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 70 [2021-11-21 01:32:24,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:32:24,668 INFO L225 Difference]: With dead ends: 27394 [2021-11-21 01:32:24,668 INFO L226 Difference]: Without dead ends: 27392 [2021-11-21 01:32:24,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=242, Invalid=688, Unknown=0, NotChecked=0, Total=930 [2021-11-21 01:32:24,682 INFO L933 BasicCegarLoop]: 355 mSDtfsCounter, 1115 mSDsluCounter, 1905 mSDsCounter, 0 mSdLazyCounter, 976 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1115 SdHoareTripleChecker+Valid, 2239 SdHoareTripleChecker+Invalid, 1010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:32:24,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1115 Valid, 2239 Invalid, 1010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 976 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-21 01:32:24,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27392 states. [2021-11-21 01:32:26,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27392 to 19775. [2021-11-21 01:32:26,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19775 states, 19774 states have (on average 1.438201678972388) internal successors, (28439), 19774 states have internal predecessors, (28439), 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 01:32:26,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19775 states to 19775 states and 28439 transitions. [2021-11-21 01:32:26,196 INFO L78 Accepts]: Start accepts. Automaton has 19775 states and 28439 transitions. Word has length 70 [2021-11-21 01:32:26,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:32:26,196 INFO L470 AbstractCegarLoop]: Abstraction has 19775 states and 28439 transitions. [2021-11-21 01:32:26,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 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 01:32:26,197 INFO L276 IsEmpty]: Start isEmpty. Operand 19775 states and 28439 transitions. [2021-11-21 01:32:26,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-21 01:32:26,198 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:32:26,198 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] [2021-11-21 01:32:26,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-21 01:32:26,198 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:32:26,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:32:26,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1661768201, now seen corresponding path program 1 times [2021-11-21 01:32:26,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:32:26,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549432053] [2021-11-21 01:32:26,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:32:26,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:32:26,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:32:26,850 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 01:32:26,850 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:32:26,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549432053] [2021-11-21 01:32:26,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549432053] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:32:26,850 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:32:26,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-21 01:32:26,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715059219] [2021-11-21 01:32:26,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:32:26,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-21 01:32:26,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:32:26,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-21 01:32:26,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-11-21 01:32:26,853 INFO L87 Difference]: Start difference. First operand 19775 states and 28439 transitions. Second operand has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 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 01:32:29,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:32:29,324 INFO L93 Difference]: Finished difference Result 25170 states and 36165 transitions. [2021-11-21 01:32:29,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-21 01:32:29,325 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 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 70 [2021-11-21 01:32:29,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:32:29,363 INFO L225 Difference]: With dead ends: 25170 [2021-11-21 01:32:29,363 INFO L226 Difference]: Without dead ends: 23120 [2021-11-21 01:32:29,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=188, Invalid=568, Unknown=0, NotChecked=0, Total=756 [2021-11-21 01:32:29,376 INFO L933 BasicCegarLoop]: 346 mSDtfsCounter, 1014 mSDsluCounter, 2209 mSDsCounter, 0 mSdLazyCounter, 1057 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1014 SdHoareTripleChecker+Valid, 2534 SdHoareTripleChecker+Invalid, 1086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:32:29,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1014 Valid, 2534 Invalid, 1086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1057 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-21 01:32:29,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23120 states. [2021-11-21 01:32:31,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23120 to 21651. [2021-11-21 01:32:31,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21651 states, 21650 states have (on average 1.4369976905311779) internal successors, (31111), 21650 states have internal predecessors, (31111), 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 01:32:31,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21651 states to 21651 states and 31111 transitions. [2021-11-21 01:32:31,247 INFO L78 Accepts]: Start accepts. Automaton has 21651 states and 31111 transitions. Word has length 70 [2021-11-21 01:32:31,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:32:31,248 INFO L470 AbstractCegarLoop]: Abstraction has 21651 states and 31111 transitions. [2021-11-21 01:32:31,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 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 01:32:31,248 INFO L276 IsEmpty]: Start isEmpty. Operand 21651 states and 31111 transitions. [2021-11-21 01:32:31,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-21 01:32:31,249 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:32:31,250 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] [2021-11-21 01:32:31,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-21 01:32:31,250 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:32:31,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:32:31,251 INFO L85 PathProgramCache]: Analyzing trace with hash 723400169, now seen corresponding path program 1 times [2021-11-21 01:32:31,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:32:31,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799961531] [2021-11-21 01:32:31,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:32:31,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:32:31,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:32:32,287 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 01:32:32,287 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:32:32,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799961531] [2021-11-21 01:32:32,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799961531] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:32:32,287 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:32:32,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-11-21 01:32:32,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997222295] [2021-11-21 01:32:32,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:32:32,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-21 01:32:32,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:32:32,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-21 01:32:32,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-11-21 01:32:32,290 INFO L87 Difference]: Start difference. First operand 21651 states and 31111 transitions. Second operand has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 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 01:32:36,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:32:36,016 INFO L93 Difference]: Finished difference Result 24966 states and 35806 transitions. [2021-11-21 01:32:36,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-21 01:32:36,017 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 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 70 [2021-11-21 01:32:36,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:32:36,058 INFO L225 Difference]: With dead ends: 24966 [2021-11-21 01:32:36,058 INFO L226 Difference]: Without dead ends: 24964 [2021-11-21 01:32:36,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=322, Invalid=1160, Unknown=0, NotChecked=0, Total=1482 [2021-11-21 01:32:36,068 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 1394 mSDsluCounter, 1980 mSDsCounter, 0 mSdLazyCounter, 2630 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1394 SdHoareTripleChecker+Valid, 2185 SdHoareTripleChecker+Invalid, 2657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 2630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:32:36,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1394 Valid, 2185 Invalid, 2657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 2630 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-21 01:32:36,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24964 states. [2021-11-21 01:32:37,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24964 to 21689. [2021-11-21 01:32:37,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21689 states, 21688 states have (on average 1.4366008852821837) internal successors, (31157), 21688 states have internal predecessors, (31157), 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 01:32:37,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21689 states to 21689 states and 31157 transitions. [2021-11-21 01:32:37,798 INFO L78 Accepts]: Start accepts. Automaton has 21689 states and 31157 transitions. Word has length 70 [2021-11-21 01:32:37,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:32:37,798 INFO L470 AbstractCegarLoop]: Abstraction has 21689 states and 31157 transitions. [2021-11-21 01:32:37,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 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 01:32:37,798 INFO L276 IsEmpty]: Start isEmpty. Operand 21689 states and 31157 transitions. [2021-11-21 01:32:37,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-21 01:32:37,800 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:32:37,800 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] [2021-11-21 01:32:37,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-21 01:32:37,800 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:32:37,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:32:37,801 INFO L85 PathProgramCache]: Analyzing trace with hash -185887427, now seen corresponding path program 1 times [2021-11-21 01:32:37,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:32:37,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121790254] [2021-11-21 01:32:37,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:32:37,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:32:37,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:32:38,600 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 01:32:38,600 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:32:38,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121790254] [2021-11-21 01:32:38,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121790254] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:32:38,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:32:38,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-21 01:32:38,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243186932] [2021-11-21 01:32:38,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:32:38,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-21 01:32:38,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:32:38,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-21 01:32:38,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2021-11-21 01:32:38,602 INFO L87 Difference]: Start difference. First operand 21689 states and 31157 transitions. Second operand has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 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 01:32:41,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:32:41,874 INFO L93 Difference]: Finished difference Result 35709 states and 51196 transitions. [2021-11-21 01:32:41,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-21 01:32:41,875 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 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 72 [2021-11-21 01:32:41,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:32:41,935 INFO L225 Difference]: With dead ends: 35709 [2021-11-21 01:32:41,935 INFO L226 Difference]: Without dead ends: 33659 [2021-11-21 01:32:41,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=268, Invalid=788, Unknown=0, NotChecked=0, Total=1056 [2021-11-21 01:32:41,956 INFO L933 BasicCegarLoop]: 360 mSDtfsCounter, 1001 mSDsluCounter, 2455 mSDsCounter, 0 mSdLazyCounter, 953 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1001 SdHoareTripleChecker+Valid, 2770 SdHoareTripleChecker+Invalid, 990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:32:41,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1001 Valid, 2770 Invalid, 990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 953 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-21 01:32:41,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33659 states. [2021-11-21 01:32:43,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33659 to 25232. [2021-11-21 01:32:43,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25232 states, 25231 states have (on average 1.4350996789663508) internal successors, (36209), 25231 states have internal predecessors, (36209), 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 01:32:43,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25232 states to 25232 states and 36209 transitions. [2021-11-21 01:32:43,883 INFO L78 Accepts]: Start accepts. Automaton has 25232 states and 36209 transitions. Word has length 72 [2021-11-21 01:32:43,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:32:43,883 INFO L470 AbstractCegarLoop]: Abstraction has 25232 states and 36209 transitions. [2021-11-21 01:32:43,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 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 01:32:43,884 INFO L276 IsEmpty]: Start isEmpty. Operand 25232 states and 36209 transitions. [2021-11-21 01:32:43,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-21 01:32:43,885 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:32:43,885 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] [2021-11-21 01:32:43,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-21 01:32:43,885 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:32:43,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:32:43,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1628350749, now seen corresponding path program 1 times [2021-11-21 01:32:43,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:32:43,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171560389] [2021-11-21 01:32:43,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:32:43,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:32:43,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:32:44,612 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 01:32:44,612 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:32:44,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171560389] [2021-11-21 01:32:44,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171560389] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:32:44,612 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:32:44,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-21 01:32:44,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769761526] [2021-11-21 01:32:44,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:32:44,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-21 01:32:44,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:32:44,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-21 01:32:44,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-11-21 01:32:44,614 INFO L87 Difference]: Start difference. First operand 25232 states and 36209 transitions. Second operand has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 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 01:32:48,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:32:48,163 INFO L93 Difference]: Finished difference Result 40196 states and 57850 transitions. [2021-11-21 01:32:48,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-21 01:32:48,164 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 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 72 [2021-11-21 01:32:48,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:32:48,215 INFO L225 Difference]: With dead ends: 40196 [2021-11-21 01:32:48,215 INFO L226 Difference]: Without dead ends: 40194 [2021-11-21 01:32:48,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=254, Invalid=738, Unknown=0, NotChecked=0, Total=992 [2021-11-21 01:32:48,223 INFO L933 BasicCegarLoop]: 253 mSDtfsCounter, 1124 mSDsluCounter, 1856 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1124 SdHoareTripleChecker+Valid, 2091 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:32:48,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1124 Valid, 2091 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 01:32:48,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40194 states. [2021-11-21 01:32:49,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40194 to 25235. [2021-11-21 01:32:50,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25235 states, 25234 states have (on average 1.4350479511769834) internal successors, (36212), 25234 states have internal predecessors, (36212), 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 01:32:50,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25235 states to 25235 states and 36212 transitions. [2021-11-21 01:32:50,052 INFO L78 Accepts]: Start accepts. Automaton has 25235 states and 36212 transitions. Word has length 72 [2021-11-21 01:32:50,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:32:50,052 INFO L470 AbstractCegarLoop]: Abstraction has 25235 states and 36212 transitions. [2021-11-21 01:32:50,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 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 01:32:50,053 INFO L276 IsEmpty]: Start isEmpty. Operand 25235 states and 36212 transitions. [2021-11-21 01:32:50,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-21 01:32:50,054 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:32:50,054 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] [2021-11-21 01:32:50,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-21 01:32:50,055 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:32:50,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:32:50,055 INFO L85 PathProgramCache]: Analyzing trace with hash 742458621, now seen corresponding path program 1 times [2021-11-21 01:32:50,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:32:50,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701864239] [2021-11-21 01:32:50,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:32:50,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:32:50,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:32:50,722 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 01:32:50,722 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:32:50,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701864239] [2021-11-21 01:32:50,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701864239] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:32:50,723 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:32:50,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-21 01:32:50,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842045738] [2021-11-21 01:32:50,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:32:50,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-21 01:32:50,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:32:50,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-21 01:32:50,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-11-21 01:32:50,725 INFO L87 Difference]: Start difference. First operand 25235 states and 36212 transitions. Second operand has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 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 01:32:54,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:32:54,987 INFO L93 Difference]: Finished difference Result 49143 states and 70710 transitions. [2021-11-21 01:32:54,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-21 01:32:54,988 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 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 72 [2021-11-21 01:32:54,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:32:55,054 INFO L225 Difference]: With dead ends: 49143 [2021-11-21 01:32:55,054 INFO L226 Difference]: Without dead ends: 45045 [2021-11-21 01:32:55,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=234, Invalid=696, Unknown=0, NotChecked=0, Total=930 [2021-11-21 01:32:55,072 INFO L933 BasicCegarLoop]: 247 mSDtfsCounter, 1040 mSDsluCounter, 1272 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1040 SdHoareTripleChecker+Valid, 1507 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:32:55,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1040 Valid, 1507 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 627 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 01:32:55,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45045 states. [2021-11-21 01:32:57,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45045 to 26818. [2021-11-21 01:32:57,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26818 states, 26817 states have (on average 1.434761531864116) internal successors, (38476), 26817 states have internal predecessors, (38476), 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 01:32:57,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26818 states to 26818 states and 38476 transitions. [2021-11-21 01:32:57,358 INFO L78 Accepts]: Start accepts. Automaton has 26818 states and 38476 transitions. Word has length 72 [2021-11-21 01:32:57,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:32:57,358 INFO L470 AbstractCegarLoop]: Abstraction has 26818 states and 38476 transitions. [2021-11-21 01:32:57,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 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 01:32:57,358 INFO L276 IsEmpty]: Start isEmpty. Operand 26818 states and 38476 transitions. [2021-11-21 01:32:57,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-21 01:32:57,359 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:32:57,360 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] [2021-11-21 01:32:57,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-21 01:32:57,360 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:32:57,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:32:57,360 INFO L85 PathProgramCache]: Analyzing trace with hash -195909411, now seen corresponding path program 1 times [2021-11-21 01:32:57,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:32:57,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948555136] [2021-11-21 01:32:57,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:32:57,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:32:57,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:32:58,149 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 01:32:58,149 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:32:58,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948555136] [2021-11-21 01:32:58,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948555136] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:32:58,150 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:32:58,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-21 01:32:58,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596559795] [2021-11-21 01:32:58,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:32:58,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-21 01:32:58,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:32:58,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-21 01:32:58,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-11-21 01:32:58,152 INFO L87 Difference]: Start difference. First operand 26818 states and 38476 transitions. Second operand has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 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 01:33:03,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:03,241 INFO L93 Difference]: Finished difference Result 50847 states and 73046 transitions. [2021-11-21 01:33:03,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-21 01:33:03,242 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 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 72 [2021-11-21 01:33:03,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:03,320 INFO L225 Difference]: With dead ends: 50847 [2021-11-21 01:33:03,320 INFO L226 Difference]: Without dead ends: 50845 [2021-11-21 01:33:03,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=332, Invalid=928, Unknown=0, NotChecked=0, Total=1260 [2021-11-21 01:33:03,336 INFO L933 BasicCegarLoop]: 283 mSDtfsCounter, 1275 mSDsluCounter, 1678 mSDsCounter, 0 mSdLazyCounter, 815 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1275 SdHoareTripleChecker+Valid, 1944 SdHoareTripleChecker+Invalid, 866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:03,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1275 Valid, 1944 Invalid, 866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 815 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-21 01:33:03,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50845 states. [2021-11-21 01:33:05,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50845 to 26829. [2021-11-21 01:33:05,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26829 states, 26828 states have (on average 1.434695094677203) internal successors, (38490), 26828 states have internal predecessors, (38490), 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 01:33:05,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26829 states to 26829 states and 38490 transitions. [2021-11-21 01:33:05,810 INFO L78 Accepts]: Start accepts. Automaton has 26829 states and 38490 transitions. Word has length 72 [2021-11-21 01:33:05,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:05,810 INFO L470 AbstractCegarLoop]: Abstraction has 26829 states and 38490 transitions. [2021-11-21 01:33:05,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 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 01:33:05,811 INFO L276 IsEmpty]: Start isEmpty. Operand 26829 states and 38490 transitions. [2021-11-21 01:33:05,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-21 01:33:05,812 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:05,812 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] [2021-11-21 01:33:05,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-21 01:33:05,813 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:33:05,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:05,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1540424451, now seen corresponding path program 1 times [2021-11-21 01:33:05,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:05,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027538670] [2021-11-21 01:33:05,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:05,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:33:05,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:06,614 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 01:33:06,614 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:06,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027538670] [2021-11-21 01:33:06,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027538670] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:33:06,614 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:33:06,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-21 01:33:06,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15014828] [2021-11-21 01:33:06,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:33:06,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-21 01:33:06,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:33:06,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-21 01:33:06,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-11-21 01:33:06,616 INFO L87 Difference]: Start difference. First operand 26829 states and 38490 transitions. Second operand has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 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 01:33:10,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:10,533 INFO L93 Difference]: Finished difference Result 41233 states and 59206 transitions. [2021-11-21 01:33:10,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-21 01:33:10,534 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 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 72 [2021-11-21 01:33:10,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:10,579 INFO L225 Difference]: With dead ends: 41233 [2021-11-21 01:33:10,579 INFO L226 Difference]: Without dead ends: 33359 [2021-11-21 01:33:10,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=311, Invalid=879, Unknown=0, NotChecked=0, Total=1190 [2021-11-21 01:33:10,595 INFO L933 BasicCegarLoop]: 356 mSDtfsCounter, 1119 mSDsluCounter, 2166 mSDsCounter, 0 mSdLazyCounter, 830 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1119 SdHoareTripleChecker+Valid, 2492 SdHoareTripleChecker+Invalid, 861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:10,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1119 Valid, 2492 Invalid, 861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 830 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-21 01:33:10,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33359 states. [2021-11-21 01:33:13,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33359 to 29536. [2021-11-21 01:33:13,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29536 states, 29535 states have (on average 1.4328423903842897) internal successors, (42319), 29535 states have internal predecessors, (42319), 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 01:33:13,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29536 states to 29536 states and 42319 transitions. [2021-11-21 01:33:13,232 INFO L78 Accepts]: Start accepts. Automaton has 29536 states and 42319 transitions. Word has length 72 [2021-11-21 01:33:13,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:13,233 INFO L470 AbstractCegarLoop]: Abstraction has 29536 states and 42319 transitions. [2021-11-21 01:33:13,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 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 01:33:13,234 INFO L276 IsEmpty]: Start isEmpty. Operand 29536 states and 42319 transitions. [2021-11-21 01:33:13,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-21 01:33:13,236 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:13,236 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] [2021-11-21 01:33:13,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-21 01:33:13,236 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:33:13,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:13,237 INFO L85 PathProgramCache]: Analyzing trace with hash 930282685, now seen corresponding path program 1 times [2021-11-21 01:33:13,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:13,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195679520] [2021-11-21 01:33:13,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:13,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:33:13,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:14,000 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 01:33:14,000 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:14,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195679520] [2021-11-21 01:33:14,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195679520] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:33:14,001 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:33:14,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-21 01:33:14,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312357659] [2021-11-21 01:33:14,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:33:14,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-21 01:33:14,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:33:14,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-21 01:33:14,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-11-21 01:33:14,002 INFO L87 Difference]: Start difference. First operand 29536 states and 42319 transitions. Second operand has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 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 01:33:18,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:18,902 INFO L93 Difference]: Finished difference Result 44147 states and 63194 transitions. [2021-11-21 01:33:18,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-21 01:33:18,904 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 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 72 [2021-11-21 01:33:18,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:18,964 INFO L225 Difference]: With dead ends: 44147 [2021-11-21 01:33:18,964 INFO L226 Difference]: Without dead ends: 44145 [2021-11-21 01:33:18,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=332, Invalid=928, Unknown=0, NotChecked=0, Total=1260 [2021-11-21 01:33:18,976 INFO L933 BasicCegarLoop]: 349 mSDtfsCounter, 1221 mSDsluCounter, 2553 mSDsCounter, 0 mSdLazyCounter, 1135 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1221 SdHoareTripleChecker+Valid, 2870 SdHoareTripleChecker+Invalid, 1176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:18,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1221 Valid, 2870 Invalid, 1176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1135 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-21 01:33:19,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44145 states. [2021-11-21 01:33:21,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44145 to 29555. [2021-11-21 01:33:21,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29555 states, 29554 states have (on average 1.4326994653853962) internal successors, (42342), 29554 states have internal predecessors, (42342), 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 01:33:21,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29555 states to 29555 states and 42342 transitions. [2021-11-21 01:33:21,739 INFO L78 Accepts]: Start accepts. Automaton has 29555 states and 42342 transitions. Word has length 72 [2021-11-21 01:33:21,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:21,739 INFO L470 AbstractCegarLoop]: Abstraction has 29555 states and 42342 transitions. [2021-11-21 01:33:21,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 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 01:33:21,739 INFO L276 IsEmpty]: Start isEmpty. Operand 29555 states and 42342 transitions. [2021-11-21 01:33:21,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-21 01:33:21,741 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:21,741 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] [2021-11-21 01:33:21,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-21 01:33:21,742 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:33:21,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:21,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1594815677, now seen corresponding path program 1 times [2021-11-21 01:33:21,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:21,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636317706] [2021-11-21 01:33:21,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:21,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:33:21,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:22,479 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 01:33:22,479 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:22,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636317706] [2021-11-21 01:33:22,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636317706] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:33:22,480 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:33:22,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-21 01:33:22,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170415700] [2021-11-21 01:33:22,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:33:22,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-21 01:33:22,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:33:22,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-21 01:33:22,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-11-21 01:33:22,481 INFO L87 Difference]: Start difference. First operand 29555 states and 42342 transitions. Second operand has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 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 01:33:26,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:26,712 INFO L93 Difference]: Finished difference Result 36859 states and 52777 transitions. [2021-11-21 01:33:26,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-21 01:33:26,712 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 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 72 [2021-11-21 01:33:26,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:26,760 INFO L225 Difference]: With dead ends: 36859 [2021-11-21 01:33:26,760 INFO L226 Difference]: Without dead ends: 34809 [2021-11-21 01:33:26,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=255, Invalid=737, Unknown=0, NotChecked=0, Total=992 [2021-11-21 01:33:26,772 INFO L933 BasicCegarLoop]: 357 mSDtfsCounter, 1001 mSDsluCounter, 1868 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1001 SdHoareTripleChecker+Valid, 2206 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:26,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1001 Valid, 2206 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 880 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-21 01:33:26,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34809 states. [2021-11-21 01:33:29,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34809 to 29559. [2021-11-21 01:33:29,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29559 states, 29558 states have (on average 1.432674741186819) internal successors, (42347), 29558 states have internal predecessors, (42347), 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 01:33:29,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29559 states to 29559 states and 42347 transitions. [2021-11-21 01:33:29,519 INFO L78 Accepts]: Start accepts. Automaton has 29559 states and 42347 transitions. Word has length 72 [2021-11-21 01:33:29,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:29,519 INFO L470 AbstractCegarLoop]: Abstraction has 29559 states and 42347 transitions. [2021-11-21 01:33:29,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 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 01:33:29,519 INFO L276 IsEmpty]: Start isEmpty. Operand 29559 states and 42347 transitions. [2021-11-21 01:33:29,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-21 01:33:29,521 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:29,521 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] [2021-11-21 01:33:29,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-21 01:33:29,522 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:33:29,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:29,522 INFO L85 PathProgramCache]: Analyzing trace with hash -282362755, now seen corresponding path program 1 times [2021-11-21 01:33:29,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:29,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574444091] [2021-11-21 01:33:29,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:29,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:33:29,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:30,340 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 01:33:30,340 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:30,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574444091] [2021-11-21 01:33:30,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574444091] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:33:30,341 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:33:30,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-21 01:33:30,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698578776] [2021-11-21 01:33:30,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:33:30,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-21 01:33:30,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:33:30,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-21 01:33:30,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-11-21 01:33:30,342 INFO L87 Difference]: Start difference. First operand 29559 states and 42347 transitions. Second operand has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 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 01:33:34,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:34,452 INFO L93 Difference]: Finished difference Result 34903 states and 49911 transitions. [2021-11-21 01:33:34,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-21 01:33:34,454 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 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 72 [2021-11-21 01:33:34,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:34,507 INFO L225 Difference]: With dead ends: 34903 [2021-11-21 01:33:34,507 INFO L226 Difference]: Without dead ends: 34901 [2021-11-21 01:33:34,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=297, Invalid=893, Unknown=0, NotChecked=0, Total=1190 [2021-11-21 01:33:34,517 INFO L933 BasicCegarLoop]: 411 mSDtfsCounter, 1219 mSDsluCounter, 2803 mSDsCounter, 0 mSdLazyCounter, 988 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1219 SdHoareTripleChecker+Valid, 3177 SdHoareTripleChecker+Invalid, 1028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:34,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1219 Valid, 3177 Invalid, 1028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 988 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-21 01:33:34,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34901 states. [2021-11-21 01:33:37,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34901 to 30595. [2021-11-21 01:33:37,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30595 states, 30594 states have (on average 1.4317186376413675) internal successors, (43802), 30594 states have internal predecessors, (43802), 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 01:33:37,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30595 states to 30595 states and 43802 transitions. [2021-11-21 01:33:37,528 INFO L78 Accepts]: Start accepts. Automaton has 30595 states and 43802 transitions. Word has length 72 [2021-11-21 01:33:37,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:37,528 INFO L470 AbstractCegarLoop]: Abstraction has 30595 states and 43802 transitions. [2021-11-21 01:33:37,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 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 01:33:37,528 INFO L276 IsEmpty]: Start isEmpty. Operand 30595 states and 43802 transitions. [2021-11-21 01:33:37,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-21 01:33:37,530 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:37,530 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] [2021-11-21 01:33:37,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-21 01:33:37,531 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:33:37,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:37,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1890743842, now seen corresponding path program 1 times [2021-11-21 01:33:37,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:37,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826034325] [2021-11-21 01:33:37,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:37,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:33:37,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:37,565 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 01:33:37,566 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:37,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826034325] [2021-11-21 01:33:37,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826034325] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:33:37,566 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:33:37,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:33:37,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150559247] [2021-11-21 01:33:37,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:33:37,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:33:37,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:33:37,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:33:37,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:33:37,568 INFO L87 Difference]: Start difference. First operand 30595 states and 43802 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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 01:33:40,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:40,683 INFO L93 Difference]: Finished difference Result 50808 states and 72880 transitions. [2021-11-21 01:33:40,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:33:40,684 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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 73 [2021-11-21 01:33:40,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:40,732 INFO L225 Difference]: With dead ends: 50808 [2021-11-21 01:33:40,732 INFO L226 Difference]: Without dead ends: 29698 [2021-11-21 01:33:40,756 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 01:33:40,756 INFO L933 BasicCegarLoop]: 273 mSDtfsCounter, 148 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:40,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 371 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:33:40,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29698 states. [2021-11-21 01:33:43,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29698 to 29696. [2021-11-21 01:33:43,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29696 states, 29695 states have (on average 1.4298029971375652) internal successors, (42458), 29695 states have internal predecessors, (42458), 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 01:33:43,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29696 states to 29696 states and 42458 transitions. [2021-11-21 01:33:43,636 INFO L78 Accepts]: Start accepts. Automaton has 29696 states and 42458 transitions. Word has length 73 [2021-11-21 01:33:43,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:43,636 INFO L470 AbstractCegarLoop]: Abstraction has 29696 states and 42458 transitions. [2021-11-21 01:33:43,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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 01:33:43,636 INFO L276 IsEmpty]: Start isEmpty. Operand 29696 states and 42458 transitions. [2021-11-21 01:33:43,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-21 01:33:43,638 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:43,638 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] [2021-11-21 01:33:43,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-21 01:33:43,638 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:33:43,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:43,638 INFO L85 PathProgramCache]: Analyzing trace with hash 551298297, now seen corresponding path program 1 times [2021-11-21 01:33:43,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:43,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98818842] [2021-11-21 01:33:43,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:43,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:33:43,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:43,669 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 01:33:43,669 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:43,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98818842] [2021-11-21 01:33:43,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98818842] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:33:43,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:33:43,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:33:43,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311628636] [2021-11-21 01:33:43,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:33:43,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:33:43,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:33:43,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:33:43,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:33:43,671 INFO L87 Difference]: Start difference. First operand 29696 states and 42458 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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 01:33:46,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:46,528 INFO L93 Difference]: Finished difference Result 57662 states and 82624 transitions. [2021-11-21 01:33:46,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:33:46,529 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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 73 [2021-11-21 01:33:46,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:46,568 INFO L225 Difference]: With dead ends: 57662 [2021-11-21 01:33:46,568 INFO L226 Difference]: Without dead ends: 29298 [2021-11-21 01:33:46,592 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 01:33:46,593 INFO L933 BasicCegarLoop]: 259 mSDtfsCounter, 136 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:46,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 369 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:33:46,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29298 states. [2021-11-21 01:33:49,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29298 to 28819. [2021-11-21 01:33:49,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28819 states, 28818 states have (on average 1.4278228884724824) internal successors, (41147), 28818 states have internal predecessors, (41147), 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 01:33:49,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28819 states to 28819 states and 41147 transitions. [2021-11-21 01:33:49,331 INFO L78 Accepts]: Start accepts. Automaton has 28819 states and 41147 transitions. Word has length 73 [2021-11-21 01:33:49,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:33:49,331 INFO L470 AbstractCegarLoop]: Abstraction has 28819 states and 41147 transitions. [2021-11-21 01:33:49,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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 01:33:49,331 INFO L276 IsEmpty]: Start isEmpty. Operand 28819 states and 41147 transitions. [2021-11-21 01:33:49,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-21 01:33:49,333 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:33:49,333 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] [2021-11-21 01:33:49,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-21 01:33:49,333 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:33:49,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:33:49,334 INFO L85 PathProgramCache]: Analyzing trace with hash -233667855, now seen corresponding path program 1 times [2021-11-21 01:33:49,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:33:49,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838990248] [2021-11-21 01:33:49,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:33:49,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:33:49,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:33:51,371 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 01:33:51,371 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:33:51,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838990248] [2021-11-21 01:33:51,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838990248] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:33:51,371 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:33:51,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-11-21 01:33:51,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667079578] [2021-11-21 01:33:51,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:33:51,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-21 01:33:51,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:33:51,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-21 01:33:51,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2021-11-21 01:33:51,373 INFO L87 Difference]: Start difference. First operand 28819 states and 41147 transitions. Second operand has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:33:58,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:58,184 INFO L93 Difference]: Finished difference Result 39854 states and 56954 transitions. [2021-11-21 01:33:58,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-21 01:33:58,186 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-21 01:33:58,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:58,237 INFO L225 Difference]: With dead ends: 39854 [2021-11-21 01:33:58,237 INFO L226 Difference]: Without dead ends: 36108 [2021-11-21 01:33:58,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=587, Invalid=1863, Unknown=0, NotChecked=0, Total=2450 [2021-11-21 01:33:58,251 INFO L933 BasicCegarLoop]: 340 mSDtfsCounter, 1238 mSDsluCounter, 2806 mSDsCounter, 0 mSdLazyCounter, 1803 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1238 SdHoareTripleChecker+Valid, 3104 SdHoareTripleChecker+Invalid, 1849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:33:58,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1238 Valid, 3104 Invalid, 1849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1803 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-21 01:33:58,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36108 states. [2021-11-21 01:34:00,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36108 to 28812. [2021-11-21 01:34:00,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28812 states, 28811 states have (on average 1.4278574155704418) internal successors, (41138), 28811 states have internal predecessors, (41138), 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 01:34:01,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28812 states to 28812 states and 41138 transitions. [2021-11-21 01:34:01,032 INFO L78 Accepts]: Start accepts. Automaton has 28812 states and 41138 transitions. Word has length 74 [2021-11-21 01:34:01,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:34:01,033 INFO L470 AbstractCegarLoop]: Abstraction has 28812 states and 41138 transitions. [2021-11-21 01:34:01,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:34:01,033 INFO L276 IsEmpty]: Start isEmpty. Operand 28812 states and 41138 transitions. [2021-11-21 01:34:01,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-21 01:34:01,034 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:34:01,035 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] [2021-11-21 01:34:01,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-21 01:34:01,035 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:34:01,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:34:01,036 INFO L85 PathProgramCache]: Analyzing trace with hash -2057928015, now seen corresponding path program 1 times [2021-11-21 01:34:01,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:34:01,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077021319] [2021-11-21 01:34:01,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:34:01,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:34:01,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:34:03,129 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 01:34:03,129 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:34:03,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077021319] [2021-11-21 01:34:03,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077021319] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:34:03,129 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:34:03,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2021-11-21 01:34:03,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683308269] [2021-11-21 01:34:03,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:34:03,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-21 01:34:03,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:34:03,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-21 01:34:03,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2021-11-21 01:34:03,131 INFO L87 Difference]: Start difference. First operand 28812 states and 41138 transitions. Second operand has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:34:10,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:34:10,132 INFO L93 Difference]: Finished difference Result 32028 states and 45678 transitions. [2021-11-21 01:34:10,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-21 01:34:10,132 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-21 01:34:10,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:34:10,197 INFO L225 Difference]: With dead ends: 32028 [2021-11-21 01:34:10,197 INFO L226 Difference]: Without dead ends: 32026 [2021-11-21 01:34:10,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=463, Invalid=1607, Unknown=0, NotChecked=0, Total=2070 [2021-11-21 01:34:10,211 INFO L933 BasicCegarLoop]: 350 mSDtfsCounter, 981 mSDsluCounter, 2654 mSDsCounter, 0 mSdLazyCounter, 3240 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 981 SdHoareTripleChecker+Valid, 2997 SdHoareTripleChecker+Invalid, 3286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 3240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:34:10,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [981 Valid, 2997 Invalid, 3286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 3240 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-21 01:34:10,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32026 states. [2021-11-21 01:34:12,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32026 to 28826. [2021-11-21 01:34:12,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28826 states, 28825 states have (on average 1.4278230702515178) internal successors, (41157), 28825 states have internal predecessors, (41157), 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 01:34:13,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28826 states to 28826 states and 41157 transitions. [2021-11-21 01:34:13,037 INFO L78 Accepts]: Start accepts. Automaton has 28826 states and 41157 transitions. Word has length 74 [2021-11-21 01:34:13,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:34:13,037 INFO L470 AbstractCegarLoop]: Abstraction has 28826 states and 41157 transitions. [2021-11-21 01:34:13,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:34:13,037 INFO L276 IsEmpty]: Start isEmpty. Operand 28826 states and 41157 transitions. [2021-11-21 01:34:13,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-21 01:34:13,038 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:34:13,039 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] [2021-11-21 01:34:13,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-21 01:34:13,039 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:34:13,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:34:13,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1393395023, now seen corresponding path program 1 times [2021-11-21 01:34:13,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:34:13,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403758738] [2021-11-21 01:34:13,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:34:13,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:34:13,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:34:13,804 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 01:34:13,804 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:34:13,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403758738] [2021-11-21 01:34:13,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403758738] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:34:13,805 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:34:13,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-21 01:34:13,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302627070] [2021-11-21 01:34:13,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:34:13,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-21 01:34:13,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:34:13,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-21 01:34:13,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-11-21 01:34:13,806 INFO L87 Difference]: Start difference. First operand 28826 states and 41157 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:34:17,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:34:17,875 INFO L93 Difference]: Finished difference Result 35778 states and 51069 transitions. [2021-11-21 01:34:17,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-21 01:34:17,876 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-21 01:34:17,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:34:17,923 INFO L225 Difference]: With dead ends: 35778 [2021-11-21 01:34:17,923 INFO L226 Difference]: Without dead ends: 33792 [2021-11-21 01:34:17,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=289, Invalid=833, Unknown=0, NotChecked=0, Total=1122 [2021-11-21 01:34:17,935 INFO L933 BasicCegarLoop]: 338 mSDtfsCounter, 881 mSDsluCounter, 1887 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 881 SdHoareTripleChecker+Valid, 2201 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:34:17,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [881 Valid, 2201 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-21 01:34:17,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33792 states. [2021-11-21 01:34:20,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33792 to 28819. [2021-11-21 01:34:20,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28819 states, 28818 states have (on average 1.4278575890068708) internal successors, (41148), 28818 states have internal predecessors, (41148), 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 01:34:20,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28819 states to 28819 states and 41148 transitions. [2021-11-21 01:34:20,798 INFO L78 Accepts]: Start accepts. Automaton has 28819 states and 41148 transitions. Word has length 74 [2021-11-21 01:34:20,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:34:20,799 INFO L470 AbstractCegarLoop]: Abstraction has 28819 states and 41148 transitions. [2021-11-21 01:34:20,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:34:20,799 INFO L276 IsEmpty]: Start isEmpty. Operand 28819 states and 41148 transitions. [2021-11-21 01:34:20,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-21 01:34:20,800 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:34:20,801 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] [2021-11-21 01:34:20,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-21 01:34:20,801 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:34:20,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:34:20,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1024393841, now seen corresponding path program 1 times [2021-11-21 01:34:20,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:34:20,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80325581] [2021-11-21 01:34:20,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:34:20,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:34:20,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:34:23,412 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 01:34:23,412 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:34:23,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80325581] [2021-11-21 01:34:23,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80325581] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:34:23,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:34:23,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2021-11-21 01:34:23,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391156916] [2021-11-21 01:34:23,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:34:23,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-21 01:34:23,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:34:23,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-21 01:34:23,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2021-11-21 01:34:23,414 INFO L87 Difference]: Start difference. First operand 28819 states and 41148 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:34:31,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:34:31,256 INFO L93 Difference]: Finished difference Result 31983 states and 45629 transitions. [2021-11-21 01:34:31,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-21 01:34:31,263 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-21 01:34:31,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:34:31,307 INFO L225 Difference]: With dead ends: 31983 [2021-11-21 01:34:31,307 INFO L226 Difference]: Without dead ends: 31981 [2021-11-21 01:34:31,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=607, Invalid=1943, Unknown=0, NotChecked=0, Total=2550 [2021-11-21 01:34:31,317 INFO L933 BasicCegarLoop]: 333 mSDtfsCounter, 1603 mSDsluCounter, 2287 mSDsCounter, 0 mSdLazyCounter, 3127 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1603 SdHoareTripleChecker+Valid, 2613 SdHoareTripleChecker+Invalid, 3178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 3127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:34:31,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1603 Valid, 2613 Invalid, 3178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 3127 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-11-21 01:34:31,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31981 states. [2021-11-21 01:34:34,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31981 to 30789. [2021-11-21 01:34:34,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30789 states, 30788 states have (on average 1.427017019618033) internal successors, (43935), 30788 states have internal predecessors, (43935), 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 01:34:34,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30789 states to 30789 states and 43935 transitions. [2021-11-21 01:34:34,327 INFO L78 Accepts]: Start accepts. Automaton has 30789 states and 43935 transitions. Word has length 74 [2021-11-21 01:34:34,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:34:34,327 INFO L470 AbstractCegarLoop]: Abstraction has 30789 states and 43935 transitions. [2021-11-21 01:34:34,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:34:34,328 INFO L276 IsEmpty]: Start isEmpty. Operand 30789 states and 43935 transitions. [2021-11-21 01:34:34,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-21 01:34:34,329 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:34:34,329 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] [2021-11-21 01:34:34,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-21 01:34:34,329 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:34:34,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:34:34,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1454549359, now seen corresponding path program 1 times [2021-11-21 01:34:34,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:34:34,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007965259] [2021-11-21 01:34:34,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:34:34,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:34:34,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:34:36,442 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 01:34:36,442 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:34:36,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007965259] [2021-11-21 01:34:36,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007965259] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:34:36,442 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:34:36,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-11-21 01:34:36,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919257658] [2021-11-21 01:34:36,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:34:36,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-21 01:34:36,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:34:36,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-21 01:34:36,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-11-21 01:34:36,444 INFO L87 Difference]: Start difference. First operand 30789 states and 43935 transitions. Second operand has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:34:45,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:34:45,014 INFO L93 Difference]: Finished difference Result 34622 states and 49368 transitions. [2021-11-21 01:34:45,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-21 01:34:45,015 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-21 01:34:45,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:34:45,059 INFO L225 Difference]: With dead ends: 34622 [2021-11-21 01:34:45,059 INFO L226 Difference]: Without dead ends: 32668 [2021-11-21 01:34:45,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=642, Invalid=2010, Unknown=0, NotChecked=0, Total=2652 [2021-11-21 01:34:45,071 INFO L933 BasicCegarLoop]: 344 mSDtfsCounter, 1704 mSDsluCounter, 3223 mSDsCounter, 0 mSdLazyCounter, 1973 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1704 SdHoareTripleChecker+Valid, 3521 SdHoareTripleChecker+Invalid, 2007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:34:45,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1704 Valid, 3521 Invalid, 2007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1973 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-21 01:34:45,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32668 states. [2021-11-21 01:34:48,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32668 to 31691. [2021-11-21 01:34:48,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31691 states, 31690 states have (on average 1.426285894603976) internal successors, (45199), 31690 states have internal predecessors, (45199), 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 01:34:48,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31691 states to 31691 states and 45199 transitions. [2021-11-21 01:34:48,202 INFO L78 Accepts]: Start accepts. Automaton has 31691 states and 45199 transitions. Word has length 74 [2021-11-21 01:34:48,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:34:48,202 INFO L470 AbstractCegarLoop]: Abstraction has 31691 states and 45199 transitions. [2021-11-21 01:34:48,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:34:48,202 INFO L276 IsEmpty]: Start isEmpty. Operand 31691 states and 45199 transitions. [2021-11-21 01:34:48,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-21 01:34:48,203 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:34:48,204 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] [2021-11-21 01:34:48,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-21 01:34:48,204 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:34:48,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:34:48,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1902049905, now seen corresponding path program 1 times [2021-11-21 01:34:48,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:34:48,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576447801] [2021-11-21 01:34:48,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:34:48,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:34:48,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:34:49,260 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 01:34:49,260 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:34:49,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576447801] [2021-11-21 01:34:49,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576447801] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:34:49,260 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:34:49,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-11-21 01:34:49,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555327052] [2021-11-21 01:34:49,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:34:49,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-21 01:34:49,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:34:49,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-21 01:34:49,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-11-21 01:34:49,262 INFO L87 Difference]: Start difference. First operand 31691 states and 45199 transitions. Second operand has 25 states, 25 states have (on average 2.96) internal successors, (74), 24 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:34:55,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:34:55,136 INFO L93 Difference]: Finished difference Result 34918 states and 49749 transitions. [2021-11-21 01:34:55,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-21 01:34:55,137 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.96) internal successors, (74), 24 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-21 01:34:55,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:34:55,184 INFO L225 Difference]: With dead ends: 34918 [2021-11-21 01:34:55,184 INFO L226 Difference]: Without dead ends: 34916 [2021-11-21 01:34:55,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=371, Invalid=1351, Unknown=0, NotChecked=0, Total=1722 [2021-11-21 01:34:55,194 INFO L933 BasicCegarLoop]: 225 mSDtfsCounter, 1123 mSDsluCounter, 2295 mSDsCounter, 0 mSdLazyCounter, 3367 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1123 SdHoareTripleChecker+Valid, 2520 SdHoareTripleChecker+Invalid, 3391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 3367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:34:55,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1123 Valid, 2520 Invalid, 3391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 3367 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-21 01:34:55,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34916 states. [2021-11-21 01:34:58,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34916 to 31691. [2021-11-21 01:34:58,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31691 states, 31690 states have (on average 1.426285894603976) internal successors, (45199), 31690 states have internal predecessors, (45199), 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 01:34:58,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31691 states to 31691 states and 45199 transitions. [2021-11-21 01:34:58,359 INFO L78 Accepts]: Start accepts. Automaton has 31691 states and 45199 transitions. Word has length 74 [2021-11-21 01:34:58,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:34:58,359 INFO L470 AbstractCegarLoop]: Abstraction has 31691 states and 45199 transitions. [2021-11-21 01:34:58,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.96) internal successors, (74), 24 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:34:58,360 INFO L276 IsEmpty]: Start isEmpty. Operand 31691 states and 45199 transitions. [2021-11-21 01:34:58,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-21 01:34:58,361 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:34:58,361 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] [2021-11-21 01:34:58,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-21 01:34:58,362 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:34:58,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:34:58,362 INFO L85 PathProgramCache]: Analyzing trace with hash 963239505, now seen corresponding path program 1 times [2021-11-21 01:34:58,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:34:58,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410219415] [2021-11-21 01:34:58,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:34:58,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:34:58,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:34:59,531 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 01:34:59,531 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:34:59,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410219415] [2021-11-21 01:34:59,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410219415] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:34:59,531 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:34:59,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-11-21 01:34:59,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780623797] [2021-11-21 01:34:59,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:34:59,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-21 01:34:59,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:34:59,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-21 01:34:59,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-11-21 01:34:59,533 INFO L87 Difference]: Start difference. First operand 31691 states and 45199 transitions. Second operand has 25 states, 25 states have (on average 2.96) internal successors, (74), 24 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:35:05,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:35:05,040 INFO L93 Difference]: Finished difference Result 34909 states and 49741 transitions. [2021-11-21 01:35:05,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-21 01:35:05,041 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.96) internal successors, (74), 24 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-21 01:35:05,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:35:05,087 INFO L225 Difference]: With dead ends: 34909 [2021-11-21 01:35:05,087 INFO L226 Difference]: Without dead ends: 34907 [2021-11-21 01:35:05,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=518, Invalid=1834, Unknown=0, NotChecked=0, Total=2352 [2021-11-21 01:35:05,097 INFO L933 BasicCegarLoop]: 264 mSDtfsCounter, 1426 mSDsluCounter, 1600 mSDsCounter, 0 mSdLazyCounter, 2489 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1426 SdHoareTripleChecker+Valid, 1864 SdHoareTripleChecker+Invalid, 2520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 2489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:35:05,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1426 Valid, 1864 Invalid, 2520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 2489 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-21 01:35:05,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34907 states. [2021-11-21 01:35:08,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34907 to 31691. [2021-11-21 01:35:08,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31691 states, 31690 states have (on average 1.426285894603976) internal successors, (45199), 31690 states have internal predecessors, (45199), 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 01:35:08,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31691 states to 31691 states and 45199 transitions. [2021-11-21 01:35:08,298 INFO L78 Accepts]: Start accepts. Automaton has 31691 states and 45199 transitions. Word has length 74 [2021-11-21 01:35:08,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:35:08,298 INFO L470 AbstractCegarLoop]: Abstraction has 31691 states and 45199 transitions. [2021-11-21 01:35:08,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.96) internal successors, (74), 24 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:35:08,298 INFO L276 IsEmpty]: Start isEmpty. Operand 31691 states and 45199 transitions. [2021-11-21 01:35:08,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-21 01:35:08,300 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:35:08,300 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] [2021-11-21 01:35:08,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-21 01:35:08,300 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:35:08,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:35:08,301 INFO L85 PathProgramCache]: Analyzing trace with hash -199228879, now seen corresponding path program 1 times [2021-11-21 01:35:08,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:35:08,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728533606] [2021-11-21 01:35:08,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:35:08,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:35:08,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:35:09,983 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 01:35:09,983 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:35:09,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728533606] [2021-11-21 01:35:09,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728533606] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:35:09,983 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:35:09,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-11-21 01:35:09,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804985229] [2021-11-21 01:35:09,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:35:09,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-21 01:35:09,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:35:09,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-21 01:35:09,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2021-11-21 01:35:09,985 INFO L87 Difference]: Start difference. First operand 31691 states and 45199 transitions. Second operand has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 25 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:35:16,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:35:16,705 INFO L93 Difference]: Finished difference Result 36941 states and 52593 transitions. [2021-11-21 01:35:16,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-21 01:35:16,705 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 25 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-21 01:35:16,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:35:16,757 INFO L225 Difference]: With dead ends: 36941 [2021-11-21 01:35:16,758 INFO L226 Difference]: Without dead ends: 36939 [2021-11-21 01:35:16,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=436, Invalid=1634, Unknown=0, NotChecked=0, Total=2070 [2021-11-21 01:35:16,769 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 1358 mSDsluCounter, 1713 mSDsCounter, 0 mSdLazyCounter, 2519 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1358 SdHoareTripleChecker+Valid, 1904 SdHoareTripleChecker+Invalid, 2551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 2519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:35:16,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1358 Valid, 1904 Invalid, 2551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 2519 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-21 01:35:16,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36939 states. [2021-11-21 01:35:20,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36939 to 31703. [2021-11-21 01:35:20,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31703 states, 31702 states have (on average 1.4261876222320358) internal successors, (45213), 31702 states have internal predecessors, (45213), 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 01:35:20,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31703 states to 31703 states and 45213 transitions. [2021-11-21 01:35:20,074 INFO L78 Accepts]: Start accepts. Automaton has 31703 states and 45213 transitions. Word has length 74 [2021-11-21 01:35:20,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:35:20,074 INFO L470 AbstractCegarLoop]: Abstraction has 31703 states and 45213 transitions. [2021-11-21 01:35:20,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 25 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:35:20,075 INFO L276 IsEmpty]: Start isEmpty. Operand 31703 states and 45213 transitions. [2021-11-21 01:35:20,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-21 01:35:20,076 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:35:20,076 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] [2021-11-21 01:35:20,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-21 01:35:20,076 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:35:20,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:35:20,077 INFO L85 PathProgramCache]: Analyzing trace with hash 568101739, now seen corresponding path program 1 times [2021-11-21 01:35:20,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:35:20,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077221617] [2021-11-21 01:35:20,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:35:20,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:35:20,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:35:20,106 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 01:35:20,106 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:35:20,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077221617] [2021-11-21 01:35:20,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077221617] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:35:20,106 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:35:20,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:35:20,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219074115] [2021-11-21 01:35:20,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:35:20,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:35:20,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:35:20,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:35:20,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:35:20,108 INFO L87 Difference]: Start difference. First operand 31703 states and 45213 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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 01:35:23,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:35:23,057 INFO L93 Difference]: Finished difference Result 53111 states and 75902 transitions. [2021-11-21 01:35:23,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:35:23,057 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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 75 [2021-11-21 01:35:23,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:35:23,096 INFO L225 Difference]: With dead ends: 53111 [2021-11-21 01:35:23,096 INFO L226 Difference]: Without dead ends: 27686 [2021-11-21 01:35:23,118 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 01:35:23,119 INFO L933 BasicCegarLoop]: 265 mSDtfsCounter, 135 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:35:23,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 367 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:35:23,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27686 states. [2021-11-21 01:35:26,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27686 to 27684. [2021-11-21 01:35:26,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27684 states, 27683 states have (on average 1.4221724524076147) internal successors, (39370), 27683 states have internal predecessors, (39370), 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 01:35:26,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27684 states to 27684 states and 39370 transitions. [2021-11-21 01:35:26,095 INFO L78 Accepts]: Start accepts. Automaton has 27684 states and 39370 transitions. Word has length 75 [2021-11-21 01:35:26,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:35:26,095 INFO L470 AbstractCegarLoop]: Abstraction has 27684 states and 39370 transitions. [2021-11-21 01:35:26,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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 01:35:26,095 INFO L276 IsEmpty]: Start isEmpty. Operand 27684 states and 39370 transitions. [2021-11-21 01:35:26,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-21 01:35:26,096 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:35:26,097 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] [2021-11-21 01:35:26,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-21 01:35:26,097 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:35:26,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:35:26,097 INFO L85 PathProgramCache]: Analyzing trace with hash -590612376, now seen corresponding path program 1 times [2021-11-21 01:35:26,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:35:26,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883320663] [2021-11-21 01:35:26,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:35:26,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:35:26,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:35:26,126 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 01:35:26,126 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:35:26,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883320663] [2021-11-21 01:35:26,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883320663] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:35:26,126 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:35:26,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:35:26,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362739891] [2021-11-21 01:35:26,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:35:26,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:35:26,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:35:26,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:35:26,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:35:26,128 INFO L87 Difference]: Start difference. First operand 27684 states and 39370 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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 01:35:29,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:35:29,084 INFO L93 Difference]: Finished difference Result 50785 states and 72403 transitions. [2021-11-21 01:35:29,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:35:29,084 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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 75 [2021-11-21 01:35:29,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:35:29,121 INFO L225 Difference]: With dead ends: 50785 [2021-11-21 01:35:29,121 INFO L226 Difference]: Without dead ends: 26881 [2021-11-21 01:35:29,139 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 01:35:29,139 INFO L933 BasicCegarLoop]: 261 mSDtfsCounter, 128 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:35:29,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 367 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:35:29,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26881 states. [2021-11-21 01:35:31,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26881 to 26879. [2021-11-21 01:35:31,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26879 states, 26878 states have (on average 1.4201205446833842) internal successors, (38170), 26878 states have internal predecessors, (38170), 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 01:35:31,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26879 states to 26879 states and 38170 transitions. [2021-11-21 01:35:31,843 INFO L78 Accepts]: Start accepts. Automaton has 26879 states and 38170 transitions. Word has length 75 [2021-11-21 01:35:31,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:35:31,843 INFO L470 AbstractCegarLoop]: Abstraction has 26879 states and 38170 transitions. [2021-11-21 01:35:31,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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 01:35:31,843 INFO L276 IsEmpty]: Start isEmpty. Operand 26879 states and 38170 transitions. [2021-11-21 01:35:31,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-21 01:35:31,844 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:35:31,844 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] [2021-11-21 01:35:31,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-21 01:35:31,845 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:35:31,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:35:31,845 INFO L85 PathProgramCache]: Analyzing trace with hash -448630143, now seen corresponding path program 1 times [2021-11-21 01:35:31,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:35:31,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015966473] [2021-11-21 01:35:31,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:35:31,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:35:31,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:35:31,871 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 01:35:31,872 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:35:31,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015966473] [2021-11-21 01:35:31,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015966473] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:35:31,872 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:35:31,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:35:31,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533436215] [2021-11-21 01:35:31,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:35:31,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:35:31,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:35:31,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:35:31,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:35:31,874 INFO L87 Difference]: Start difference. First operand 26879 states and 38170 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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 01:35:34,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:35:34,843 INFO L93 Difference]: Finished difference Result 48135 states and 68526 transitions. [2021-11-21 01:35:34,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:35:34,843 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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 75 [2021-11-21 01:35:34,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:35:34,882 INFO L225 Difference]: With dead ends: 48135 [2021-11-21 01:35:34,882 INFO L226 Difference]: Without dead ends: 25859 [2021-11-21 01:35:34,901 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 01:35:34,902 INFO L933 BasicCegarLoop]: 257 mSDtfsCounter, 137 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:35:34,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 351 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:35:34,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25859 states. [2021-11-21 01:35:37,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25859 to 25857. [2021-11-21 01:35:37,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25857 states, 25856 states have (on average 1.4172725866336633) internal successors, (36645), 25856 states have internal predecessors, (36645), 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 01:35:37,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25857 states to 25857 states and 36645 transitions. [2021-11-21 01:35:37,884 INFO L78 Accepts]: Start accepts. Automaton has 25857 states and 36645 transitions. Word has length 75 [2021-11-21 01:35:37,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:35:37,884 INFO L470 AbstractCegarLoop]: Abstraction has 25857 states and 36645 transitions. [2021-11-21 01:35:37,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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 01:35:37,884 INFO L276 IsEmpty]: Start isEmpty. Operand 25857 states and 36645 transitions. [2021-11-21 01:35:37,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-21 01:35:37,885 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:35:37,885 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] [2021-11-21 01:35:37,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-11-21 01:35:37,886 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:35:37,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:35:37,886 INFO L85 PathProgramCache]: Analyzing trace with hash 208088965, now seen corresponding path program 1 times [2021-11-21 01:35:37,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:35:37,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802916185] [2021-11-21 01:35:37,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:35:37,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:35:37,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:35:40,804 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 01:35:40,804 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:35:40,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802916185] [2021-11-21 01:35:40,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802916185] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:35:40,804 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:35:40,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2021-11-21 01:35:40,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358262772] [2021-11-21 01:35:40,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:35:40,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-21 01:35:40,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:35:40,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-21 01:35:40,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2021-11-21 01:35:40,806 INFO L87 Difference]: Start difference. First operand 25857 states and 36645 transitions. Second operand has 33 states, 33 states have (on average 2.303030303030303) internal successors, (76), 32 states have internal predecessors, (76), 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 01:35:49,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:35:49,545 INFO L93 Difference]: Finished difference Result 31572 states and 44730 transitions. [2021-11-21 01:35:49,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-21 01:35:49,546 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.303030303030303) internal successors, (76), 32 states have internal predecessors, (76), 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 76 [2021-11-21 01:35:49,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:35:49,586 INFO L225 Difference]: With dead ends: 31572 [2021-11-21 01:35:49,586 INFO L226 Difference]: Without dead ends: 29778 [2021-11-21 01:35:49,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=811, Invalid=2611, Unknown=0, NotChecked=0, Total=3422 [2021-11-21 01:35:49,596 INFO L933 BasicCegarLoop]: 335 mSDtfsCounter, 1095 mSDsluCounter, 3050 mSDsCounter, 0 mSdLazyCounter, 2089 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1095 SdHoareTripleChecker+Valid, 3361 SdHoareTripleChecker+Invalid, 2131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 2089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:35:49,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1095 Valid, 3361 Invalid, 2131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 2089 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-21 01:35:49,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29778 states. [2021-11-21 01:35:52,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29778 to 25841. [2021-11-21 01:35:52,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25841 states, 25840 states have (on average 1.4174922600619195) internal successors, (36628), 25840 states have internal predecessors, (36628), 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 01:35:52,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25841 states to 25841 states and 36628 transitions. [2021-11-21 01:35:52,422 INFO L78 Accepts]: Start accepts. Automaton has 25841 states and 36628 transitions. Word has length 76 [2021-11-21 01:35:52,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:35:52,422 INFO L470 AbstractCegarLoop]: Abstraction has 25841 states and 36628 transitions. [2021-11-21 01:35:52,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.303030303030303) internal successors, (76), 32 states have internal predecessors, (76), 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 01:35:52,422 INFO L276 IsEmpty]: Start isEmpty. Operand 25841 states and 36628 transitions. [2021-11-21 01:35:52,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-21 01:35:52,424 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:35:52,424 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] [2021-11-21 01:35:52,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-21 01:35:52,424 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:35:52,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:35:52,424 INFO L85 PathProgramCache]: Analyzing trace with hash -730279067, now seen corresponding path program 1 times [2021-11-21 01:35:52,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:35:52,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411093062] [2021-11-21 01:35:52,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:35:52,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:35:52,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:35:55,822 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 01:35:55,823 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:35:55,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411093062] [2021-11-21 01:35:55,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411093062] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:35:55,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:35:55,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2021-11-21 01:35:55,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974306817] [2021-11-21 01:35:55,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:35:55,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-21 01:35:55,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:35:55,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-21 01:35:55,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1007, Unknown=0, NotChecked=0, Total=1122 [2021-11-21 01:35:55,825 INFO L87 Difference]: Start difference. First operand 25841 states and 36628 transitions. Second operand has 34 states, 34 states have (on average 2.235294117647059) internal successors, (76), 33 states have internal predecessors, (76), 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 01:36:05,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:36:05,163 INFO L93 Difference]: Finished difference Result 28713 states and 40668 transitions. [2021-11-21 01:36:05,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-21 01:36:05,164 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.235294117647059) internal successors, (76), 33 states have internal predecessors, (76), 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 76 [2021-11-21 01:36:05,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:36:05,202 INFO L225 Difference]: With dead ends: 28713 [2021-11-21 01:36:05,202 INFO L226 Difference]: Without dead ends: 28711 [2021-11-21 01:36:05,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=650, Invalid=2320, Unknown=0, NotChecked=0, Total=2970 [2021-11-21 01:36:05,210 INFO L933 BasicCegarLoop]: 339 mSDtfsCounter, 1400 mSDsluCounter, 3055 mSDsCounter, 0 mSdLazyCounter, 3267 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1400 SdHoareTripleChecker+Valid, 3387 SdHoareTripleChecker+Invalid, 3349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 3267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:36:05,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1400 Valid, 3387 Invalid, 3349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 3267 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-21 01:36:05,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28711 states. [2021-11-21 01:36:07,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28711 to 25837. [2021-11-21 01:36:08,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25837 states, 25836 states have (on average 1.4175181916705373) internal successors, (36623), 25836 states have internal predecessors, (36623), 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 01:36:08,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25837 states to 25837 states and 36623 transitions. [2021-11-21 01:36:08,052 INFO L78 Accepts]: Start accepts. Automaton has 25837 states and 36623 transitions. Word has length 76 [2021-11-21 01:36:08,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:36:08,052 INFO L470 AbstractCegarLoop]: Abstraction has 25837 states and 36623 transitions. [2021-11-21 01:36:08,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.235294117647059) internal successors, (76), 33 states have internal predecessors, (76), 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 01:36:08,052 INFO L276 IsEmpty]: Start isEmpty. Operand 25837 states and 36623 transitions. [2021-11-21 01:36:08,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-21 01:36:08,053 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:36:08,053 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] [2021-11-21 01:36:08,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-11-21 01:36:08,053 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:36:08,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:36:08,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1669089467, now seen corresponding path program 1 times [2021-11-21 01:36:08,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:36:08,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830102810] [2021-11-21 01:36:08,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:36:08,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:36:08,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:36:11,318 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 01:36:11,319 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:36:11,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830102810] [2021-11-21 01:36:11,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830102810] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:36:11,321 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:36:11,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2021-11-21 01:36:11,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057992214] [2021-11-21 01:36:11,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:36:11,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-21 01:36:11,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:36:11,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-21 01:36:11,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=887, Unknown=0, NotChecked=0, Total=1056 [2021-11-21 01:36:11,322 INFO L87 Difference]: Start difference. First operand 25837 states and 36623 transitions. Second operand has 33 states, 33 states have (on average 2.303030303030303) internal successors, (76), 32 states have internal predecessors, (76), 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 01:36:20,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:36:20,020 INFO L93 Difference]: Finished difference Result 30486 states and 43163 transitions. [2021-11-21 01:36:20,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-21 01:36:20,021 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.303030303030303) internal successors, (76), 32 states have internal predecessors, (76), 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 76 [2021-11-21 01:36:20,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:36:20,060 INFO L225 Difference]: With dead ends: 30486 [2021-11-21 01:36:20,060 INFO L226 Difference]: Without dead ends: 30484 [2021-11-21 01:36:20,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=906, Invalid=2876, Unknown=0, NotChecked=0, Total=3782 [2021-11-21 01:36:20,068 INFO L933 BasicCegarLoop]: 324 mSDtfsCounter, 1048 mSDsluCounter, 2101 mSDsCounter, 0 mSdLazyCounter, 1815 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1048 SdHoareTripleChecker+Valid, 2404 SdHoareTripleChecker+Invalid, 1861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:36:20,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1048 Valid, 2404 Invalid, 1861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1815 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-21 01:36:20,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30484 states. [2021-11-21 01:36:23,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30484 to 25837. [2021-11-21 01:36:23,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25837 states, 25836 states have (on average 1.4175181916705373) internal successors, (36623), 25836 states have internal predecessors, (36623), 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 01:36:23,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25837 states to 25837 states and 36623 transitions. [2021-11-21 01:36:23,168 INFO L78 Accepts]: Start accepts. Automaton has 25837 states and 36623 transitions. Word has length 76 [2021-11-21 01:36:23,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:36:23,169 INFO L470 AbstractCegarLoop]: Abstraction has 25837 states and 36623 transitions. [2021-11-21 01:36:23,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.303030303030303) internal successors, (76), 32 states have internal predecessors, (76), 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 01:36:23,169 INFO L276 IsEmpty]: Start isEmpty. Operand 25837 states and 36623 transitions. [2021-11-21 01:36:23,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-21 01:36:23,170 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:36:23,170 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] [2021-11-21 01:36:23,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-11-21 01:36:23,171 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:36:23,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:36:23,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1463409445, now seen corresponding path program 1 times [2021-11-21 01:36:23,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:36:23,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279827311] [2021-11-21 01:36:23,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:36:23,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:36:23,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:36:27,375 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 01:36:27,375 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:36:27,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279827311] [2021-11-21 01:36:27,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279827311] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:36:27,375 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:36:27,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2021-11-21 01:36:27,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162018305] [2021-11-21 01:36:27,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:36:27,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-21 01:36:27,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:36:27,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-21 01:36:27,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1114, Unknown=0, NotChecked=0, Total=1260 [2021-11-21 01:36:27,377 INFO L87 Difference]: Start difference. First operand 25837 states and 36623 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 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 01:36:39,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:36:39,820 INFO L93 Difference]: Finished difference Result 28734 states and 40692 transitions. [2021-11-21 01:36:39,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-21 01:36:39,821 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 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 76 [2021-11-21 01:36:39,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:36:39,857 INFO L225 Difference]: With dead ends: 28734 [2021-11-21 01:36:39,858 INFO L226 Difference]: Without dead ends: 28732 [2021-11-21 01:36:39,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 813 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=1045, Invalid=3647, Unknown=0, NotChecked=0, Total=4692 [2021-11-21 01:36:39,865 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 1426 mSDsluCounter, 2243 mSDsCounter, 0 mSdLazyCounter, 4643 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1426 SdHoareTripleChecker+Valid, 2428 SdHoareTripleChecker+Invalid, 4687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 4643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:36:39,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1426 Valid, 2428 Invalid, 4687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 4643 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-11-21 01:36:39,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28732 states. [2021-11-21 01:36:43,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28732 to 25837. [2021-11-21 01:36:43,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25837 states, 25836 states have (on average 1.4175181916705373) internal successors, (36623), 25836 states have internal predecessors, (36623), 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 01:36:43,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25837 states to 25837 states and 36623 transitions. [2021-11-21 01:36:43,126 INFO L78 Accepts]: Start accepts. Automaton has 25837 states and 36623 transitions. Word has length 76 [2021-11-21 01:36:43,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:36:43,126 INFO L470 AbstractCegarLoop]: Abstraction has 25837 states and 36623 transitions. [2021-11-21 01:36:43,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 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 01:36:43,126 INFO L276 IsEmpty]: Start isEmpty. Operand 25837 states and 36623 transitions. [2021-11-21 01:36:43,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-21 01:36:43,127 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:36:43,127 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] [2021-11-21 01:36:43,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-11-21 01:36:43,127 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:36:43,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:36:43,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1471332603, now seen corresponding path program 1 times [2021-11-21 01:36:43,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:36:43,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105016758] [2021-11-21 01:36:43,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:36:43,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:36:43,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:36:46,512 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 01:36:46,512 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:36:46,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105016758] [2021-11-21 01:36:46,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105016758] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:36:46,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:36:46,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2021-11-21 01:36:46,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925217899] [2021-11-21 01:36:46,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:36:46,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-21 01:36:46,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:36:46,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-21 01:36:46,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2021-11-21 01:36:46,514 INFO L87 Difference]: Start difference. First operand 25837 states and 36623 transitions. Second operand has 33 states, 33 states have (on average 2.303030303030303) internal successors, (76), 32 states have internal predecessors, (76), 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 01:36:56,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:36:56,527 INFO L93 Difference]: Finished difference Result 28751 states and 40708 transitions. [2021-11-21 01:36:56,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-21 01:36:56,528 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.303030303030303) internal successors, (76), 32 states have internal predecessors, (76), 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 76 [2021-11-21 01:36:56,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:36:56,568 INFO L225 Difference]: With dead ends: 28751 [2021-11-21 01:36:56,568 INFO L226 Difference]: Without dead ends: 28749 [2021-11-21 01:36:56,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=680, Invalid=2626, Unknown=0, NotChecked=0, Total=3306 [2021-11-21 01:36:56,577 INFO L933 BasicCegarLoop]: 324 mSDtfsCounter, 1465 mSDsluCounter, 2331 mSDsCounter, 0 mSdLazyCounter, 3947 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1465 SdHoareTripleChecker+Valid, 2650 SdHoareTripleChecker+Invalid, 3987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 3947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:36:56,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1465 Valid, 2650 Invalid, 3987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 3947 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-11-21 01:36:56,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28749 states. [2021-11-21 01:36:59,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28749 to 25837. [2021-11-21 01:36:59,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25837 states, 25836 states have (on average 1.4175181916705373) internal successors, (36623), 25836 states have internal predecessors, (36623), 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 01:36:59,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25837 states to 25837 states and 36623 transitions. [2021-11-21 01:36:59,828 INFO L78 Accepts]: Start accepts. Automaton has 25837 states and 36623 transitions. Word has length 76 [2021-11-21 01:36:59,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:36:59,829 INFO L470 AbstractCegarLoop]: Abstraction has 25837 states and 36623 transitions. [2021-11-21 01:36:59,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.303030303030303) internal successors, (76), 32 states have internal predecessors, (76), 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 01:36:59,829 INFO L276 IsEmpty]: Start isEmpty. Operand 25837 states and 36623 transitions. [2021-11-21 01:36:59,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-21 01:36:59,830 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:36:59,830 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 01:36:59,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-11-21 01:36:59,830 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:36:59,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:36:59,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1403737351, now seen corresponding path program 1 times [2021-11-21 01:36:59,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:36:59,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415340904] [2021-11-21 01:36:59,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:36:59,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:36:59,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:37:09,905 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 01:37:09,905 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:37:09,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415340904] [2021-11-21 01:37:09,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415340904] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:37:09,905 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:37:09,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2021-11-21 01:37:09,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669223124] [2021-11-21 01:37:09,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:37:09,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-21 01:37:09,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:37:09,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-21 01:37:09,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1730, Unknown=0, NotChecked=0, Total=1892 [2021-11-21 01:37:09,908 INFO L87 Difference]: Start difference. First operand 25837 states and 36623 transitions. Second operand has 44 states, 44 states have (on average 1.7727272727272727) internal successors, (78), 43 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 01:37:28,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:37:28,325 INFO L93 Difference]: Finished difference Result 28723 states and 40679 transitions. [2021-11-21 01:37:28,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-21 01:37:28,326 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.7727272727272727) internal successors, (78), 43 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 01:37:28,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:37:28,362 INFO L225 Difference]: With dead ends: 28723 [2021-11-21 01:37:28,362 INFO L226 Difference]: Without dead ends: 28721 [2021-11-21 01:37:28,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=1264, Invalid=4436, Unknown=0, NotChecked=0, Total=5700 [2021-11-21 01:37:28,368 INFO L933 BasicCegarLoop]: 331 mSDtfsCounter, 1347 mSDsluCounter, 2931 mSDsCounter, 0 mSdLazyCounter, 5804 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1347 SdHoareTripleChecker+Valid, 3254 SdHoareTripleChecker+Invalid, 5879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 5804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:37:28,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1347 Valid, 3254 Invalid, 5879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 5804 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2021-11-21 01:37:28,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28721 states. [2021-11-21 01:37:31,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28721 to 25813. [2021-11-21 01:37:31,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25813 states, 25812 states have (on average 1.4178289167828917) internal successors, (36597), 25812 states have internal predecessors, (36597), 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 01:37:31,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25813 states to 25813 states and 36597 transitions. [2021-11-21 01:37:31,628 INFO L78 Accepts]: Start accepts. Automaton has 25813 states and 36597 transitions. Word has length 78 [2021-11-21 01:37:31,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:37:31,629 INFO L470 AbstractCegarLoop]: Abstraction has 25813 states and 36597 transitions. [2021-11-21 01:37:31,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.7727272727272727) internal successors, (78), 43 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 01:37:31,629 INFO L276 IsEmpty]: Start isEmpty. Operand 25813 states and 36597 transitions. [2021-11-21 01:37:31,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-21 01:37:31,631 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:37:31,632 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-21 01:37:31,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-11-21 01:37:31,632 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:37:31,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:37:31,632 INFO L85 PathProgramCache]: Analyzing trace with hash -824095805, now seen corresponding path program 1 times [2021-11-21 01:37:31,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:37:31,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148432848] [2021-11-21 01:37:31,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:37:31,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:37:31,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:37:31,680 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 01:37:31,680 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:37:31,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148432848] [2021-11-21 01:37:31,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148432848] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:37:31,680 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:37:31,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:37:31,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092159537] [2021-11-21 01:37:31,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:37:31,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:37:31,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:37:31,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:37:31,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:37:31,682 INFO L87 Difference]: Start difference. First operand 25813 states and 36597 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:37:35,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:37:35,500 INFO L93 Difference]: Finished difference Result 37012 states and 52893 transitions. [2021-11-21 01:37:35,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:37:35,500 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-21 01:37:35,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:37:35,540 INFO L225 Difference]: With dead ends: 37012 [2021-11-21 01:37:35,540 INFO L226 Difference]: Without dead ends: 30114 [2021-11-21 01:37:35,550 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 01:37:35,551 INFO L933 BasicCegarLoop]: 244 mSDtfsCounter, 98 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:37:35,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 416 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:37:35,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30114 states. [2021-11-21 01:37:39,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30114 to 29032. [2021-11-21 01:37:39,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29032 states, 29031 states have (on average 1.4176569873583411) internal successors, (41156), 29031 states have internal predecessors, (41156), 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 01:37:39,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29032 states to 29032 states and 41156 transitions. [2021-11-21 01:37:39,193 INFO L78 Accepts]: Start accepts. Automaton has 29032 states and 41156 transitions. Word has length 83 [2021-11-21 01:37:39,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:37:39,193 INFO L470 AbstractCegarLoop]: Abstraction has 29032 states and 41156 transitions. [2021-11-21 01:37:39,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:37:39,194 INFO L276 IsEmpty]: Start isEmpty. Operand 29032 states and 41156 transitions. [2021-11-21 01:37:39,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-21 01:37:39,197 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:37:39,197 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-21 01:37:39,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-11-21 01:37:39,197 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:37:39,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:37:39,198 INFO L85 PathProgramCache]: Analyzing trace with hash 2019429986, now seen corresponding path program 1 times [2021-11-21 01:37:39,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:37:39,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706348859] [2021-11-21 01:37:39,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:37:39,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:37:39,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:37:39,238 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 01:37:39,238 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:37:39,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706348859] [2021-11-21 01:37:39,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706348859] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:37:39,239 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:37:39,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:37:39,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049406245] [2021-11-21 01:37:39,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:37:39,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:37:39,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:37:39,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:37:39,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:37:39,240 INFO L87 Difference]: Start difference. First operand 29032 states and 41156 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:37:44,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:37:44,540 INFO L93 Difference]: Finished difference Result 67286 states and 95395 transitions. [2021-11-21 01:37:44,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:37:44,546 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-21 01:37:44,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:37:44,605 INFO L225 Difference]: With dead ends: 67286 [2021-11-21 01:37:44,605 INFO L226 Difference]: Without dead ends: 40420 [2021-11-21 01:37:44,806 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 01:37:44,806 INFO L933 BasicCegarLoop]: 281 mSDtfsCounter, 106 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:37:44,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 444 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:37:44,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40420 states. [2021-11-21 01:37:49,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40420 to 40418. [2021-11-21 01:37:50,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40418 states, 40417 states have (on average 1.4057698493208304) internal successors, (56817), 40417 states have internal predecessors, (56817), 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 01:37:50,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40418 states to 40418 states and 56817 transitions. [2021-11-21 01:37:50,084 INFO L78 Accepts]: Start accepts. Automaton has 40418 states and 56817 transitions. Word has length 86 [2021-11-21 01:37:50,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:37:50,084 INFO L470 AbstractCegarLoop]: Abstraction has 40418 states and 56817 transitions. [2021-11-21 01:37:50,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:37:50,085 INFO L276 IsEmpty]: Start isEmpty. Operand 40418 states and 56817 transitions. [2021-11-21 01:37:50,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-21 01:37:50,088 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:37:50,088 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-21 01:37:50,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-11-21 01:37:50,088 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:37:50,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:37:50,089 INFO L85 PathProgramCache]: Analyzing trace with hash -2031216062, now seen corresponding path program 1 times [2021-11-21 01:37:50,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:37:50,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319906724] [2021-11-21 01:37:50,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:37:50,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:37:50,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:37:50,129 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 01:37:50,130 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:37:50,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319906724] [2021-11-21 01:37:50,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319906724] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:37:50,130 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:37:50,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:37:50,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322931088] [2021-11-21 01:37:50,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:37:50,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:37:50,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:37:50,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:37:50,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:37:50,132 INFO L87 Difference]: Start difference. First operand 40418 states and 56817 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:37:56,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:37:56,580 INFO L93 Difference]: Finished difference Result 67337 states and 95635 transitions. [2021-11-21 01:37:56,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:37:56,581 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-21 01:37:56,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:37:56,659 INFO L225 Difference]: With dead ends: 67337 [2021-11-21 01:37:56,659 INFO L226 Difference]: Without dead ends: 50631 [2021-11-21 01:37:56,679 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 01:37:56,679 INFO L933 BasicCegarLoop]: 225 mSDtfsCounter, 93 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:37:56,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 397 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:37:56,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50631 states. [2021-11-21 01:38:03,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50631 to 47993. [2021-11-21 01:38:03,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47993 states, 47992 states have (on average 1.405275879313219) internal successors, (67442), 47992 states have internal predecessors, (67442), 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 01:38:03,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47993 states to 47993 states and 67442 transitions. [2021-11-21 01:38:03,552 INFO L78 Accepts]: Start accepts. Automaton has 47993 states and 67442 transitions. Word has length 86 [2021-11-21 01:38:03,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:38:03,552 INFO L470 AbstractCegarLoop]: Abstraction has 47993 states and 67442 transitions. [2021-11-21 01:38:03,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:38:03,553 INFO L276 IsEmpty]: Start isEmpty. Operand 47993 states and 67442 transitions. [2021-11-21 01:38:03,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-21 01:38:03,556 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:38:03,557 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-21 01:38:03,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-11-21 01:38:03,557 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:38:03,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:38:03,557 INFO L85 PathProgramCache]: Analyzing trace with hash -637325005, now seen corresponding path program 1 times [2021-11-21 01:38:03,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:38:03,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792082407] [2021-11-21 01:38:03,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:38:03,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:38:03,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:38:03,605 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 01:38:03,606 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:38:03,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792082407] [2021-11-21 01:38:03,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792082407] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:38:03,606 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:38:03,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:38:03,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144414259] [2021-11-21 01:38:03,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:38:03,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:38:03,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:38:03,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:38:03,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:38:03,608 INFO L87 Difference]: Start difference. First operand 47993 states and 67442 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)