./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f6d4b2-10c1-4383-9966-d664f0357015/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f6d4b2-10c1-4383-9966-d664f0357015/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f6d4b2-10c1-4383-9966-d664f0357015/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f6d4b2-10c1-4383-9966-d664f0357015/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f6d4b2-10c1-4383-9966-d664f0357015/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f6d4b2-10c1-4383-9966-d664f0357015/bin/utaipan-eEHZpOm5b7 --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 cd7d66127097bee693df60b26ad836789e8e18ef088953d4d01590e6c82035a4 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 17:59:03,417 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 17:59:03,419 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 17:59:03,449 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 17:59:03,449 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 17:59:03,451 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 17:59:03,452 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 17:59:03,455 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 17:59:03,457 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 17:59:03,458 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 17:59:03,459 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 17:59:03,460 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 17:59:03,461 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 17:59:03,462 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 17:59:03,463 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 17:59:03,465 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 17:59:03,466 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 17:59:03,467 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 17:59:03,469 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 17:59:03,472 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 17:59:03,473 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 17:59:03,475 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 17:59:03,476 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 17:59:03,477 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 17:59:03,481 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 17:59:03,481 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 17:59:03,482 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 17:59:03,483 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 17:59:03,483 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 17:59:03,485 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 17:59:03,485 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 17:59:03,486 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 17:59:03,487 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 17:59:03,488 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 17:59:03,489 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 17:59:03,489 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 17:59:03,490 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 17:59:03,490 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 17:59:03,491 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 17:59:03,492 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 17:59:03,493 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 17:59:03,496 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f6d4b2-10c1-4383-9966-d664f0357015/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 17:59:03,530 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 17:59:03,530 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 17:59:03,531 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 17:59:03,531 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 17:59:03,532 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 17:59:03,532 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 17:59:03,532 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 17:59:03,532 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 17:59:03,532 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 17:59:03,533 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 17:59:03,533 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 17:59:03,533 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 17:59:03,533 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 17:59:03,533 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 17:59:03,534 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 17:59:03,534 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 17:59:03,534 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 17:59:03,534 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 17:59:03,535 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 17:59:03,535 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 17:59:03,535 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 17:59:03,535 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 17:59:03,536 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 17:59:03,536 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 17:59:03,536 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 17:59:03,536 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 17:59:03,536 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 17:59:03,537 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 17:59:03,537 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 17:59:03,537 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 17:59:03,537 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 17:59:03,537 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 17:59:03,538 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 17:59:03,538 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 17:59:03,538 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 17:59:03,538 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 17:59:03,538 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 17:59:03,539 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 17:59:03,539 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 17:59:03,539 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 17:59:03,539 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 17:59:03,539 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_43f6d4b2-10c1-4383-9966-d664f0357015/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f6d4b2-10c1-4383-9966-d664f0357015/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cd7d66127097bee693df60b26ad836789e8e18ef088953d4d01590e6c82035a4 [2021-11-25 17:59:03,831 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 17:59:03,863 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 17:59:03,866 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 17:59:03,868 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 17:59:03,869 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 17:59:03,870 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f6d4b2-10c1-4383-9966-d664f0357015/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-25 17:59:03,934 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f6d4b2-10c1-4383-9966-d664f0357015/bin/utaipan-eEHZpOm5b7/data/62377710a/09c587c9b41143d7be3812cc5a98b958/FLAG153063f12 [2021-11-25 17:59:04,572 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 17:59:04,579 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f6d4b2-10c1-4383-9966-d664f0357015/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-25 17:59:04,598 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f6d4b2-10c1-4383-9966-d664f0357015/bin/utaipan-eEHZpOm5b7/data/62377710a/09c587c9b41143d7be3812cc5a98b958/FLAG153063f12 [2021-11-25 17:59:04,871 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f6d4b2-10c1-4383-9966-d664f0357015/bin/utaipan-eEHZpOm5b7/data/62377710a/09c587c9b41143d7be3812cc5a98b958 [2021-11-25 17:59:04,873 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 17:59:04,875 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 17:59:04,876 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 17:59:04,877 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 17:59:04,882 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 17:59:04,883 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:59:04" (1/1) ... [2021-11-25 17:59:04,884 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77e0a7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:59:04, skipping insertion in model container [2021-11-25 17:59:04,884 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:59:04" (1/1) ... [2021-11-25 17:59:04,892 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 17:59:04,934 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 17:59:05,190 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_43f6d4b2-10c1-4383-9966-d664f0357015/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7669,7682] [2021-11-25 17:59:05,227 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 17:59:05,248 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 17:59:05,346 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_43f6d4b2-10c1-4383-9966-d664f0357015/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7669,7682] [2021-11-25 17:59:05,387 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 17:59:05,407 INFO L208 MainTranslator]: Completed translation [2021-11-25 17:59:05,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:59:05 WrapperNode [2021-11-25 17:59:05,408 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 17:59:05,409 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 17:59:05,410 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 17:59:05,410 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 17:59:05,418 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:59:05" (1/1) ... [2021-11-25 17:59:05,435 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:59:05" (1/1) ... [2021-11-25 17:59:05,479 INFO L137 Inliner]: procedures = 27, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 573 [2021-11-25 17:59:05,480 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 17:59:05,481 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 17:59:05,481 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 17:59:05,481 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 17:59:05,490 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:59:05" (1/1) ... [2021-11-25 17:59:05,490 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:59:05" (1/1) ... [2021-11-25 17:59:05,495 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:59:05" (1/1) ... [2021-11-25 17:59:05,511 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:59:05" (1/1) ... [2021-11-25 17:59:05,522 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:59:05" (1/1) ... [2021-11-25 17:59:05,539 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:59:05" (1/1) ... [2021-11-25 17:59:05,541 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:59:05" (1/1) ... [2021-11-25 17:59:05,546 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 17:59:05,552 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 17:59:05,552 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 17:59:05,552 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 17:59:05,554 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:59:05" (1/1) ... [2021-11-25 17:59:05,562 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 17:59:05,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f6d4b2-10c1-4383-9966-d664f0357015/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:59:05,596 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f6d4b2-10c1-4383-9966-d664f0357015/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 17:59:05,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f6d4b2-10c1-4383-9966-d664f0357015/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 17:59:05,633 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 17:59:05,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 17:59:05,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 17:59:05,633 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 17:59:05,824 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 17:59:05,825 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 17:59:06,585 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 17:59:06,812 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 17:59:06,812 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-25 17:59:06,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:59:06 BoogieIcfgContainer [2021-11-25 17:59:06,815 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 17:59:06,816 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 17:59:06,816 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 17:59:06,820 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 17:59:06,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:59:04" (1/3) ... [2021-11-25 17:59:06,821 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@239185c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:59:06, skipping insertion in model container [2021-11-25 17:59:06,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:59:05" (2/3) ... [2021-11-25 17:59:06,822 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@239185c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:59:06, skipping insertion in model container [2021-11-25 17:59:06,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:59:06" (3/3) ... [2021-11-25 17:59:06,824 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.7.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-25 17:59:06,829 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 17:59:06,830 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 17:59:06,881 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 17:59:06,888 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 [2021-11-25 17:59:06,888 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 17:59:06,908 INFO L276 IsEmpty]: Start isEmpty. Operand has 105 states, 103 states have (on average 1.7475728155339805) internal successors, (180), 104 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:59:06,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-25 17:59:06,918 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:59:06,919 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] [2021-11-25 17:59:06,919 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:59:06,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:59:06,932 INFO L85 PathProgramCache]: Analyzing trace with hash 581733088, now seen corresponding path program 1 times [2021-11-25 17:59:06,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:59:06,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743901907] [2021-11-25 17:59:06,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:59:06,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:59:07,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:59:07,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:59:07,372 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:59:07,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743901907] [2021-11-25 17:59:07,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743901907] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:59:07,373 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:59:07,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:59:07,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613006117] [2021-11-25 17:59:07,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:59:07,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:59:07,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:59:07,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:59:07,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:59:07,422 INFO L87 Difference]: Start difference. First operand has 105 states, 103 states have (on average 1.7475728155339805) internal successors, (180), 104 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:59:07,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:59:07,572 INFO L93 Difference]: Finished difference Result 207 states and 328 transitions. [2021-11-25 17:59:07,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:59:07,575 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-25 17:59:07,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:59:07,589 INFO L225 Difference]: With dead ends: 207 [2021-11-25 17:59:07,589 INFO L226 Difference]: Without dead ends: 150 [2021-11-25 17:59:07,593 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 [2021-11-25 17:59:07,597 INFO L933 BasicCegarLoop]: 227 mSDtfsCounter, 119 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:59:07,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 295 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 17:59:07,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-11-25 17:59:07,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2021-11-25 17:59:07,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.3197278911564625) internal successors, (194), 147 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:59:07,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 194 transitions. [2021-11-25 17:59:07,675 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 194 transitions. Word has length 71 [2021-11-25 17:59:07,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:59:07,676 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 194 transitions. [2021-11-25 17:59:07,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:59:07,677 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 194 transitions. [2021-11-25 17:59:07,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-25 17:59:07,686 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:59:07,686 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] [2021-11-25 17:59:07,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 17:59:07,688 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:59:07,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:59:07,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1513983419, now seen corresponding path program 1 times [2021-11-25 17:59:07,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:59:07,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727122130] [2021-11-25 17:59:07,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:59:07,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:59:07,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:59:07,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:59:07,986 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:59:07,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727122130] [2021-11-25 17:59:07,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727122130] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:59:07,986 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:59:07,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:59:07,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716675370] [2021-11-25 17:59:07,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:59:07,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:59:07,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:59:07,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:59:07,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:59:07,990 INFO L87 Difference]: Start difference. First operand 148 states and 194 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:59:08,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:59:08,095 INFO L93 Difference]: Finished difference Result 332 states and 466 transitions. [2021-11-25 17:59:08,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:59:08,097 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-25 17:59:08,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:59:08,103 INFO L225 Difference]: With dead ends: 332 [2021-11-25 17:59:08,103 INFO L226 Difference]: Without dead ends: 236 [2021-11-25 17:59:08,109 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 [2021-11-25 17:59:08,111 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 67 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:59:08,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 236 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 17:59:08,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-11-25 17:59:08,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 234. [2021-11-25 17:59:08,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.3776824034334765) internal successors, (321), 233 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:59:08,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 321 transitions. [2021-11-25 17:59:08,160 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 321 transitions. Word has length 74 [2021-11-25 17:59:08,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:59:08,160 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 321 transitions. [2021-11-25 17:59:08,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:59:08,161 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 321 transitions. [2021-11-25 17:59:08,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-25 17:59:08,162 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:59:08,163 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:59:08,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 17:59:08,166 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:59:08,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:59:08,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1718077475, now seen corresponding path program 1 times [2021-11-25 17:59:08,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:59:08,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718964540] [2021-11-25 17:59:08,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:59:08,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:59:08,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:59:08,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:59:08,334 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:59:08,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718964540] [2021-11-25 17:59:08,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718964540] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:59:08,336 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:59:08,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:59:08,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974911204] [2021-11-25 17:59:08,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:59:08,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:59:08,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:59:08,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:59:08,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:59:08,339 INFO L87 Difference]: Start difference. First operand 234 states and 321 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:59:08,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:59:08,425 INFO L93 Difference]: Finished difference Result 582 states and 835 transitions. [2021-11-25 17:59:08,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:59:08,426 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-25 17:59:08,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:59:08,431 INFO L225 Difference]: With dead ends: 582 [2021-11-25 17:59:08,431 INFO L226 Difference]: Without dead ends: 400 [2021-11-25 17:59:08,433 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 [2021-11-25 17:59:08,435 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 62 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 17:59:08,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 232 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 17:59:08,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-11-25 17:59:08,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 398. [2021-11-25 17:59:08,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 1.4130982367758187) internal successors, (561), 397 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:59:08,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 561 transitions. [2021-11-25 17:59:08,469 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 561 transitions. Word has length 77 [2021-11-25 17:59:08,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:59:08,470 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 561 transitions. [2021-11-25 17:59:08,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:59:08,471 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 561 transitions. [2021-11-25 17:59:08,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-25 17:59:08,472 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:59:08,472 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:59:08,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 17:59:08,473 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:59:08,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:59:08,474 INFO L85 PathProgramCache]: Analyzing trace with hash 414824335, now seen corresponding path program 1 times [2021-11-25 17:59:08,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:59:08,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990768371] [2021-11-25 17:59:08,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:59:08,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:59:08,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:59:08,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:59:08,550 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:59:08,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990768371] [2021-11-25 17:59:08,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990768371] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:59:08,551 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:59:08,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:59:08,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679806981] [2021-11-25 17:59:08,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:59:08,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:59:08,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:59:08,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:59:08,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:59:08,553 INFO L87 Difference]: Start difference. First operand 398 states and 561 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:59:08,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:59:08,652 INFO L93 Difference]: Finished difference Result 1058 states and 1531 transitions. [2021-11-25 17:59:08,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:59:08,653 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-25 17:59:08,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:59:08,657 INFO L225 Difference]: With dead ends: 1058 [2021-11-25 17:59:08,658 INFO L226 Difference]: Without dead ends: 712 [2021-11-25 17:59:08,659 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 [2021-11-25 17:59:08,660 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 57 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 17:59:08,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 228 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 17:59:08,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2021-11-25 17:59:08,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 710. [2021-11-25 17:59:08,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 709 states have (on average 1.4287729196050776) internal successors, (1013), 709 states have internal predecessors, (1013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:59:08,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 1013 transitions. [2021-11-25 17:59:08,710 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 1013 transitions. Word has length 80 [2021-11-25 17:59:08,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:59:08,710 INFO L470 AbstractCegarLoop]: Abstraction has 710 states and 1013 transitions. [2021-11-25 17:59:08,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:59:08,711 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 1013 transitions. [2021-11-25 17:59:08,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-25 17:59:08,712 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:59:08,712 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:59:08,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 17:59:08,713 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:59:08,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:59:08,714 INFO L85 PathProgramCache]: Analyzing trace with hash 603450138, now seen corresponding path program 1 times [2021-11-25 17:59:08,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:59:08,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139717611] [2021-11-25 17:59:08,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:59:08,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:59:08,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:59:08,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:59:08,786 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:59:08,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139717611] [2021-11-25 17:59:08,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139717611] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:59:08,787 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:59:08,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:59:08,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536576173] [2021-11-25 17:59:08,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:59:08,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:59:08,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:59:08,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:59:08,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:59:08,789 INFO L87 Difference]: Start difference. First operand 710 states and 1013 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:59:08,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:59:08,936 INFO L93 Difference]: Finished difference Result 1962 states and 2839 transitions. [2021-11-25 17:59:08,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:59:08,937 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 [2021-11-25 17:59:08,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:59:08,946 INFO L225 Difference]: With dead ends: 1962 [2021-11-25 17:59:08,946 INFO L226 Difference]: Without dead ends: 1304 [2021-11-25 17:59:08,947 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 [2021-11-25 17:59:08,949 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 52 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 17:59:08,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 224 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 17:59:08,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1304 states. [2021-11-25 17:59:09,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1304 to 1302. [2021-11-25 17:59:09,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1302 states, 1301 states have (on average 1.4304381245196003) internal successors, (1861), 1301 states have internal predecessors, (1861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:59:09,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 1861 transitions. [2021-11-25 17:59:09,068 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 1861 transitions. Word has length 83 [2021-11-25 17:59:09,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:59:09,069 INFO L470 AbstractCegarLoop]: Abstraction has 1302 states and 1861 transitions. [2021-11-25 17:59:09,069 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) [2021-11-25 17:59:09,070 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 1861 transitions. [2021-11-25 17:59:09,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-25 17:59:09,071 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:59:09,071 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:59:09,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 17:59:09,071 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:59:09,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:59:09,072 INFO L85 PathProgramCache]: Analyzing trace with hash 49911211, now seen corresponding path program 1 times [2021-11-25 17:59:09,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:59:09,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146914945] [2021-11-25 17:59:09,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:59:09,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:59:09,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:59:09,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:59:09,138 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:59:09,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146914945] [2021-11-25 17:59:09,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146914945] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:59:09,138 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:59:09,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:59:09,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355915434] [2021-11-25 17:59:09,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:59:09,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:59:09,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:59:09,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:59:09,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:59:09,140 INFO L87 Difference]: Start difference. First operand 1302 states and 1861 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:59:09,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:59:09,392 INFO L93 Difference]: Finished difference Result 3674 states and 5287 transitions. [2021-11-25 17:59:09,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:59:09,392 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 [2021-11-25 17:59:09,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:59:09,407 INFO L225 Difference]: With dead ends: 3674 [2021-11-25 17:59:09,407 INFO L226 Difference]: Without dead ends: 2424 [2021-11-25 17:59:09,410 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 [2021-11-25 17:59:09,411 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 47 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 17:59:09,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 220 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 17:59:09,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2424 states. [2021-11-25 17:59:09,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2424 to 2422. [2021-11-25 17:59:09,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2422 states, 2421 states have (on average 1.4229657166460141) internal successors, (3445), 2421 states have internal predecessors, (3445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:59:09,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2422 states to 2422 states and 3445 transitions. [2021-11-25 17:59:09,623 INFO L78 Accepts]: Start accepts. Automaton has 2422 states and 3445 transitions. Word has length 86 [2021-11-25 17:59:09,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:59:09,624 INFO L470 AbstractCegarLoop]: Abstraction has 2422 states and 3445 transitions. [2021-11-25 17:59:09,624 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) [2021-11-25 17:59:09,624 INFO L276 IsEmpty]: Start isEmpty. Operand 2422 states and 3445 transitions. [2021-11-25 17:59:09,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-25 17:59:09,625 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:59:09,625 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:59:09,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 17:59:09,626 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:59:09,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:59:09,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1603620760, now seen corresponding path program 1 times [2021-11-25 17:59:09,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:59:09,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688540295] [2021-11-25 17:59:09,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:59:09,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:59:09,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:59:09,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:59:09,688 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:59:09,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688540295] [2021-11-25 17:59:09,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688540295] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:59:09,689 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:59:09,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:59:09,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261568700] [2021-11-25 17:59:09,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:59:09,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:59:09,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:59:09,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:59:09,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:59:09,691 INFO L87 Difference]: Start difference. First operand 2422 states and 3445 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:59:10,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:59:10,079 INFO L93 Difference]: Finished difference Result 6906 states and 9847 transitions. [2021-11-25 17:59:10,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:59:10,080 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-25 17:59:10,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:59:10,106 INFO L225 Difference]: With dead ends: 6906 [2021-11-25 17:59:10,107 INFO L226 Difference]: Without dead ends: 4536 [2021-11-25 17:59:10,113 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 [2021-11-25 17:59:10,116 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 42 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 17:59:10,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 216 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 17:59:10,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4536 states. [2021-11-25 17:59:10,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4536 to 4534. [2021-11-25 17:59:10,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4534 states, 4533 states have (on average 1.4094418707257887) internal successors, (6389), 4533 states have internal predecessors, (6389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:59:10,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4534 states to 4534 states and 6389 transitions. [2021-11-25 17:59:10,526 INFO L78 Accepts]: Start accepts. Automaton has 4534 states and 6389 transitions. Word has length 89 [2021-11-25 17:59:10,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:59:10,527 INFO L470 AbstractCegarLoop]: Abstraction has 4534 states and 6389 transitions. [2021-11-25 17:59:10,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:59:10,528 INFO L276 IsEmpty]: Start isEmpty. Operand 4534 states and 6389 transitions. [2021-11-25 17:59:10,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-25 17:59:10,529 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:59:10,530 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:59:10,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 17:59:10,530 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:59:10,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:59:10,532 INFO L85 PathProgramCache]: Analyzing trace with hash 352834937, now seen corresponding path program 1 times [2021-11-25 17:59:10,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:59:10,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289422001] [2021-11-25 17:59:10,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:59:10,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:59:10,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:59:10,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:59:10,685 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:59:10,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289422001] [2021-11-25 17:59:10,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289422001] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:59:10,686 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:59:10,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-25 17:59:10,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103954776] [2021-11-25 17:59:10,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:59:10,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 17:59:10,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:59:10,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 17:59:10,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-25 17:59:10,688 INFO L87 Difference]: Start difference. First operand 4534 states and 6389 transitions. Second operand has 9 states, 9 states have (on average 10.222222222222221) internal successors, (92), 9 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:59:12,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:59:12,434 INFO L93 Difference]: Finished difference Result 18170 states and 25800 transitions. [2021-11-25 17:59:12,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-25 17:59:12,435 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.222222222222221) internal successors, (92), 9 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-11-25 17:59:12,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:59:12,526 INFO L225 Difference]: With dead ends: 18170 [2021-11-25 17:59:12,526 INFO L226 Difference]: Without dead ends: 13688 [2021-11-25 17:59:12,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2021-11-25 17:59:12,539 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 1102 mSDsluCounter, 3220 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1102 SdHoareTripleChecker+Valid, 3279 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 17:59:12,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1102 Valid, 3279 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 17:59:12,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13688 states. [2021-11-25 17:59:13,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13688 to 5938. [2021-11-25 17:59:13,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5938 states, 5937 states have (on average 1.3986862051541182) internal successors, (8304), 5937 states have internal predecessors, (8304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:59:13,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5938 states to 5938 states and 8304 transitions. [2021-11-25 17:59:13,304 INFO L78 Accepts]: Start accepts. Automaton has 5938 states and 8304 transitions. Word has length 92 [2021-11-25 17:59:13,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:59:13,305 INFO L470 AbstractCegarLoop]: Abstraction has 5938 states and 8304 transitions. [2021-11-25 17:59:13,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.222222222222221) internal successors, (92), 9 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:59:13,305 INFO L276 IsEmpty]: Start isEmpty. Operand 5938 states and 8304 transitions. [2021-11-25 17:59:13,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-25 17:59:13,306 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:59:13,306 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:59:13,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 17:59:13,306 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:59:13,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:59:13,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1139820540, now seen corresponding path program 1 times [2021-11-25 17:59:13,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:59:13,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949098002] [2021-11-25 17:59:13,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:59:13,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:59:13,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:59:13,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:59:13,374 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:59:13,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949098002] [2021-11-25 17:59:13,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949098002] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:59:13,374 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:59:13,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:59:13,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568347090] [2021-11-25 17:59:13,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:59:13,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:59:13,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:59:13,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:59:13,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:59:13,376 INFO L87 Difference]: Start difference. First operand 5938 states and 8304 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:59:14,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:59:14,256 INFO L93 Difference]: Finished difference Result 15216 states and 21418 transitions. [2021-11-25 17:59:14,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:59:14,257 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-11-25 17:59:14,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:59:14,311 INFO L225 Difference]: With dead ends: 15216 [2021-11-25 17:59:14,311 INFO L226 Difference]: Without dead ends: 9330 [2021-11-25 17:59:14,324 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 [2021-11-25 17:59:14,325 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 36 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 17:59:14,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 183 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 17:59:14,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9330 states. [2021-11-25 17:59:15,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9330 to 9328. [2021-11-25 17:59:15,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9328 states, 9327 states have (on average 1.4045244987670205) internal successors, (13100), 9327 states have internal predecessors, (13100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:59:15,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9328 states to 9328 states and 13100 transitions. [2021-11-25 17:59:15,330 INFO L78 Accepts]: Start accepts. Automaton has 9328 states and 13100 transitions. Word has length 94 [2021-11-25 17:59:15,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:59:15,331 INFO L470 AbstractCegarLoop]: Abstraction has 9328 states and 13100 transitions. [2021-11-25 17:59:15,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:59:15,331 INFO L276 IsEmpty]: Start isEmpty. Operand 9328 states and 13100 transitions. [2021-11-25 17:59:15,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-25 17:59:15,332 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:59:15,332 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:59:15,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 17:59:15,333 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:59:15,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:59:15,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1128857452, now seen corresponding path program 1 times [2021-11-25 17:59:15,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:59:15,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920873914] [2021-11-25 17:59:15,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:59:15,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:59:15,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:59:15,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:59:15,618 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:59:15,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920873914] [2021-11-25 17:59:15,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920873914] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:59:15,619 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:59:15,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-25 17:59:15,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541250440] [2021-11-25 17:59:15,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:59:15,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 17:59:15,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:59:15,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 17:59:15,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-25 17:59:15,621 INFO L87 Difference]: Start difference. First operand 9328 states and 13100 transitions. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:59:16,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:59:16,799 INFO L93 Difference]: Finished difference Result 18604 states and 26147 transitions. [2021-11-25 17:59:16,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 17:59:16,800 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-11-25 17:59:16,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:59:16,827 INFO L225 Difference]: With dead ends: 18604 [2021-11-25 17:59:16,827 INFO L226 Difference]: Without dead ends: 9330 [2021-11-25 17:59:16,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-11-25 17:59:16,844 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 550 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:59:16,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [550 Valid, 552 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 17:59:16,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9330 states. [2021-11-25 17:59:17,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9330 to 9328. [2021-11-25 17:59:17,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9328 states, 9327 states have (on average 1.4043100675458347) internal successors, (13098), 9327 states have internal predecessors, (13098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:59:17,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9328 states to 9328 states and 13098 transitions. [2021-11-25 17:59:17,562 INFO L78 Accepts]: Start accepts. Automaton has 9328 states and 13098 transitions. Word has length 94 [2021-11-25 17:59:17,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:59:17,562 INFO L470 AbstractCegarLoop]: Abstraction has 9328 states and 13098 transitions. [2021-11-25 17:59:17,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:59:17,563 INFO L276 IsEmpty]: Start isEmpty. Operand 9328 states and 13098 transitions. [2021-11-25 17:59:17,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-25 17:59:17,564 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:59:17,564 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:59:17,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-25 17:59:17,565 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:59:17,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:59:17,565 INFO L85 PathProgramCache]: Analyzing trace with hash -626712346, now seen corresponding path program 1 times [2021-11-25 17:59:17,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:59:17,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577848190] [2021-11-25 17:59:17,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:59:17,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:59:17,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:59:17,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:59:17,674 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:59:17,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577848190] [2021-11-25 17:59:17,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577848190] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:59:17,675 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:59:17,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 17:59:17,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187314508] [2021-11-25 17:59:17,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:59:17,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:59:17,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:59:17,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:59:17,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:59:17,679 INFO L87 Difference]: Start difference. First operand 9328 states and 13098 transitions. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:59:18,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:59:18,612 INFO L93 Difference]: Finished difference Result 18604 states and 26143 transitions. [2021-11-25 17:59:18,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 17:59:18,614 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-11-25 17:59:18,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:59:18,640 INFO L225 Difference]: With dead ends: 18604 [2021-11-25 17:59:18,640 INFO L226 Difference]: Without dead ends: 9330 [2021-11-25 17:59:18,659 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 [2021-11-25 17:59:18,660 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 446 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:59:18,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [446 Valid, 111 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 17:59:18,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9330 states. [2021-11-25 17:59:19,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9330 to 9328. [2021-11-25 17:59:19,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9328 states, 9327 states have (on average 1.3905864693899432) internal successors, (12970), 9327 states have internal predecessors, (12970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:59:19,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9328 states to 9328 states and 12970 transitions. [2021-11-25 17:59:19,428 INFO L78 Accepts]: Start accepts. Automaton has 9328 states and 12970 transitions. Word has length 95 [2021-11-25 17:59:19,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:59:19,428 INFO L470 AbstractCegarLoop]: Abstraction has 9328 states and 12970 transitions. [2021-11-25 17:59:19,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:59:19,429 INFO L276 IsEmpty]: Start isEmpty. Operand 9328 states and 12970 transitions. [2021-11-25 17:59:19,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-25 17:59:19,430 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:59:19,431 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:59:19,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-25 17:59:19,431 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:59:19,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:59:19,432 INFO L85 PathProgramCache]: Analyzing trace with hash -988831071, now seen corresponding path program 1 times [2021-11-25 17:59:19,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:59:19,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296339776] [2021-11-25 17:59:19,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:59:19,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:59:19,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:59:19,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:59:19,506 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:59:19,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296339776] [2021-11-25 17:59:19,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296339776] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:59:19,506 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:59:19,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 17:59:19,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619555995] [2021-11-25 17:59:19,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:59:19,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:59:19,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:59:19,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:59:19,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:59:19,508 INFO L87 Difference]: Start difference. First operand 9328 states and 12970 transitions. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:59:20,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:59:20,574 INFO L93 Difference]: Finished difference Result 18602 states and 25886 transitions. [2021-11-25 17:59:20,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 17:59:20,574 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-11-25 17:59:20,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:59:20,599 INFO L225 Difference]: With dead ends: 18602 [2021-11-25 17:59:20,599 INFO L226 Difference]: Without dead ends: 9328 [2021-11-25 17:59:20,615 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 [2021-11-25 17:59:20,615 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 250 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:59:20,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 118 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 17:59:20,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9328 states. [2021-11-25 17:59:21,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9328 to 9328. [2021-11-25 17:59:21,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9328 states, 9327 states have (on average 1.379864908330653) internal successors, (12870), 9327 states have internal predecessors, (12870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:59:21,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9328 states to 9328 states and 12870 transitions. [2021-11-25 17:59:21,409 INFO L78 Accepts]: Start accepts. Automaton has 9328 states and 12870 transitions. Word has length 95 [2021-11-25 17:59:21,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:59:21,410 INFO L470 AbstractCegarLoop]: Abstraction has 9328 states and 12870 transitions. [2021-11-25 17:59:21,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:59:21,410 INFO L276 IsEmpty]: Start isEmpty. Operand 9328 states and 12870 transitions. [2021-11-25 17:59:21,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-25 17:59:21,411 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:59:21,411 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:59:21,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-25 17:59:21,411 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:59:21,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:59:21,412 INFO L85 PathProgramCache]: Analyzing trace with hash -123298682, now seen corresponding path program 1 times [2021-11-25 17:59:21,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:59:21,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640665289] [2021-11-25 17:59:21,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:59:21,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:59:21,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:59:21,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:59:21,484 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:59:21,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640665289] [2021-11-25 17:59:21,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640665289] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:59:21,484 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:59:21,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 17:59:21,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199914837] [2021-11-25 17:59:21,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:59:21,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:59:21,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:59:21,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:59:21,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:59:21,486 INFO L87 Difference]: Start difference. First operand 9328 states and 12870 transitions. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:59:22,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:59:22,366 INFO L93 Difference]: Finished difference Result 18602 states and 25686 transitions. [2021-11-25 17:59:22,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 17:59:22,367 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-11-25 17:59:22,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:59:22,385 INFO L225 Difference]: With dead ends: 18602 [2021-11-25 17:59:22,386 INFO L226 Difference]: Without dead ends: 9328 [2021-11-25 17:59:22,400 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 [2021-11-25 17:59:22,401 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 234 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:59:22,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 126 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 17:59:22,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9328 states. [2021-11-25 17:59:23,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9328 to 9328. [2021-11-25 17:59:23,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9328 states, 9327 states have (on average 1.3693577784925486) internal successors, (12772), 9327 states have internal predecessors, (12772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:59:23,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9328 states to 9328 states and 12772 transitions. [2021-11-25 17:59:23,420 INFO L78 Accepts]: Start accepts. Automaton has 9328 states and 12772 transitions. Word has length 95 [2021-11-25 17:59:23,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:59:23,420 INFO L470 AbstractCegarLoop]: Abstraction has 9328 states and 12772 transitions. [2021-11-25 17:59:23,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:59:23,421 INFO L276 IsEmpty]: Start isEmpty. Operand 9328 states and 12772 transitions. [2021-11-25 17:59:23,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-25 17:59:23,422 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:59:23,422 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:59:23,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-25 17:59:23,423 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:59:23,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:59:23,423 INFO L85 PathProgramCache]: Analyzing trace with hash -652589183, now seen corresponding path program 1 times [2021-11-25 17:59:23,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:59:23,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502351115] [2021-11-25 17:59:23,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:59:23,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:59:23,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:59:23,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:59:23,498 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:59:23,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502351115] [2021-11-25 17:59:23,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502351115] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:59:23,499 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:59:23,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 17:59:23,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617157533] [2021-11-25 17:59:23,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:59:23,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:59:23,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:59:23,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:59:23,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:59:23,501 INFO L87 Difference]: Start difference. First operand 9328 states and 12772 transitions. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:59:24,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:59:24,498 INFO L93 Difference]: Finished difference Result 18602 states and 25490 transitions. [2021-11-25 17:59:24,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 17:59:24,499 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-11-25 17:59:24,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:59:24,515 INFO L225 Difference]: With dead ends: 18602 [2021-11-25 17:59:24,515 INFO L226 Difference]: Without dead ends: 9328 [2021-11-25 17:59:24,529 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 [2021-11-25 17:59:24,530 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 270 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:59:24,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 102 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 17:59:24,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9328 states. [2021-11-25 17:59:25,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9328 to 9328. [2021-11-25 17:59:25,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9328 states, 9327 states have (on average 1.3573496301061434) internal successors, (12660), 9327 states have internal predecessors, (12660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:59:25,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9328 states to 9328 states and 12660 transitions. [2021-11-25 17:59:25,394 INFO L78 Accepts]: Start accepts. Automaton has 9328 states and 12660 transitions. Word has length 95 [2021-11-25 17:59:25,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:59:25,395 INFO L470 AbstractCegarLoop]: Abstraction has 9328 states and 12660 transitions. [2021-11-25 17:59:25,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:59:25,395 INFO L276 IsEmpty]: Start isEmpty. Operand 9328 states and 12660 transitions. [2021-11-25 17:59:25,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-25 17:59:25,396 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:59:25,396 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:59:25,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-25 17:59:25,396 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:59:25,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:59:25,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1415452890, now seen corresponding path program 1 times [2021-11-25 17:59:25,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:59:25,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901036938] [2021-11-25 17:59:25,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:59:25,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:59:25,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:59:25,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:59:25,477 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:59:25,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901036938] [2021-11-25 17:59:25,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901036938] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:59:25,477 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:59:25,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 17:59:25,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487572953] [2021-11-25 17:59:25,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:59:25,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:59:25,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:59:25,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:59:25,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:59:25,479 INFO L87 Difference]: Start difference. First operand 9328 states and 12660 transitions. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:59:26,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:59:26,337 INFO L93 Difference]: Finished difference Result 18602 states and 25266 transitions. [2021-11-25 17:59:26,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 17:59:26,337 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-11-25 17:59:26,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:59:26,349 INFO L225 Difference]: With dead ends: 18602 [2021-11-25 17:59:26,349 INFO L226 Difference]: Without dead ends: 9328 [2021-11-25 17:59:26,358 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 [2021-11-25 17:59:26,359 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 293 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:59:26,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 86 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 17:59:26,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9328 states. [2021-11-25 17:59:27,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9328 to 9328. [2021-11-25 17:59:27,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9328 states, 9327 states have (on average 1.340195132411279) internal successors, (12500), 9327 states have internal predecessors, (12500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:59:27,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9328 states to 9328 states and 12500 transitions. [2021-11-25 17:59:27,315 INFO L78 Accepts]: Start accepts. Automaton has 9328 states and 12500 transitions. Word has length 95 [2021-11-25 17:59:27,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:59:27,316 INFO L470 AbstractCegarLoop]: Abstraction has 9328 states and 12500 transitions. [2021-11-25 17:59:27,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:59:27,316 INFO L276 IsEmpty]: Start isEmpty. Operand 9328 states and 12500 transitions. [2021-11-25 17:59:27,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-25 17:59:27,317 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:59:27,317 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:59:27,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-25 17:59:27,318 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:59:27,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:59:27,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1138097291, now seen corresponding path program 1 times [2021-11-25 17:59:27,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:59:27,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673322256] [2021-11-25 17:59:27,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:59:27,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:59:27,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:59:27,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:59:27,450 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:59:27,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673322256] [2021-11-25 17:59:27,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673322256] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:59:27,452 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:59:27,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 17:59:27,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209899158] [2021-11-25 17:59:27,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:59:27,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 17:59:27,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:59:27,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 17:59:27,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-25 17:59:27,454 INFO L87 Difference]: Start difference. First operand 9328 states and 12500 transitions. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:59:28,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:59:28,819 INFO L93 Difference]: Finished difference Result 12899 states and 17146 transitions. [2021-11-25 17:59:28,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 17:59:28,820 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-11-25 17:59:28,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:59:28,833 INFO L225 Difference]: With dead ends: 12899 [2021-11-25 17:59:28,833 INFO L226 Difference]: Without dead ends: 12897 [2021-11-25 17:59:28,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-25 17:59:28,837 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 166 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:59:28,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 721 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 17:59:28,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12897 states. [2021-11-25 17:59:29,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12897 to 9328. [2021-11-25 17:59:29,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9328 states, 9327 states have (on average 1.3333333333333333) internal successors, (12436), 9327 states have internal predecessors, (12436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:59:29,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9328 states to 9328 states and 12436 transitions. [2021-11-25 17:59:29,744 INFO L78 Accepts]: Start accepts. Automaton has 9328 states and 12436 transitions. Word has length 95 [2021-11-25 17:59:29,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:59:29,745 INFO L470 AbstractCegarLoop]: Abstraction has 9328 states and 12436 transitions. [2021-11-25 17:59:29,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:59:29,745 INFO L276 IsEmpty]: Start isEmpty. Operand 9328 states and 12436 transitions. [2021-11-25 17:59:29,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-25 17:59:29,747 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:59:29,748 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:59:29,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-25 17:59:29,748 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:59:29,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:59:29,749 INFO L85 PathProgramCache]: Analyzing trace with hash 653774224, now seen corresponding path program 1 times [2021-11-25 17:59:29,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:59:29,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863712152] [2021-11-25 17:59:29,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:59:29,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:59:29,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:59:47,065 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:59:47,066 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:59:47,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863712152] [2021-11-25 17:59:47,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863712152] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:59:47,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606838040] [2021-11-25 17:59:47,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:59:47,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:59:47,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f6d4b2-10c1-4383-9966-d664f0357015/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:59:47,068 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f6d4b2-10c1-4383-9966-d664f0357015/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:59:47,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43f6d4b2-10c1-4383-9966-d664f0357015/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 17:59:47,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:59:47,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 98 conjunts are in the unsatisfiable core [2021-11-25 17:59:47,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:02:30,326 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:02:30,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:06:34,796 WARN L227 SmtUtils]: Spent 5.03s on a formula simplification. DAG size of input: 1029 DAG size of output: 1024 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)