./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+nlh-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_fc00df30-4065-4d4b-a50e-fcd1e9bb1526/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc00df30-4065-4d4b-a50e-fcd1e9bb1526/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_fc00df30-4065-4d4b-a50e-fcd1e9bb1526/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc00df30-4065-4d4b-a50e-fcd1e9bb1526/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc00df30-4065-4d4b-a50e-fcd1e9bb1526/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_fc00df30-4065-4d4b-a50e-fcd1e9bb1526/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 3f65c5712bd883a6886a8bc01d4e0133fd034d0de7d6cdf4a43830b50c44bd44 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 17:59:23,235 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 17:59:23,238 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 17:59:23,290 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 17:59:23,291 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 17:59:23,295 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 17:59:23,297 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 17:59:23,301 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 17:59:23,304 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 17:59:23,309 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 17:59:23,310 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 17:59:23,312 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 17:59:23,313 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 17:59:23,315 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 17:59:23,317 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 17:59:23,321 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 17:59:23,323 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 17:59:23,324 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 17:59:23,326 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 17:59:23,334 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 17:59:23,336 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 17:59:23,337 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 17:59:23,340 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 17:59:23,341 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 17:59:23,350 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 17:59:23,351 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 17:59:23,351 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 17:59:23,353 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 17:59:23,354 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 17:59:23,355 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 17:59:23,356 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 17:59:23,357 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 17:59:23,359 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 17:59:23,360 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 17:59:23,361 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 17:59:23,362 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 17:59:23,363 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 17:59:23,363 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 17:59:23,363 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 17:59:23,364 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 17:59:23,365 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 17:59:23,366 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc00df30-4065-4d4b-a50e-fcd1e9bb1526/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 17:59:23,408 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 17:59:23,408 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 17:59:23,415 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 17:59:23,416 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 17:59:23,417 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 17:59:23,417 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 17:59:23,417 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 17:59:23,417 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 17:59:23,418 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 17:59:23,418 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 17:59:23,419 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 17:59:23,419 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 17:59:23,420 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 17:59:23,420 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 17:59:23,420 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 17:59:23,421 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 17:59:23,421 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 17:59:23,421 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 17:59:23,422 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 17:59:23,423 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 17:59:23,423 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 17:59:23,423 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 17:59:23,423 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 17:59:23,424 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 17:59:23,424 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 17:59:23,424 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 17:59:23,426 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 17:59:23,426 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 17:59:23,427 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 17:59:23,427 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 17:59:23,427 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 17:59:23,428 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 17:59:23,428 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 17:59:23,428 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 17:59:23,429 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 17:59:23,429 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 17:59:23,429 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 17:59:23,429 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 17:59:23,430 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 17:59:23,430 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 17:59:23,430 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 17:59:23,431 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_fc00df30-4065-4d4b-a50e-fcd1e9bb1526/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc00df30-4065-4d4b-a50e-fcd1e9bb1526/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f65c5712bd883a6886a8bc01d4e0133fd034d0de7d6cdf4a43830b50c44bd44 [2021-11-25 17:59:23,696 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 17:59:23,720 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 17:59:23,723 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 17:59:23,724 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 17:59:23,725 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 17:59:23,726 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc00df30-4065-4d4b-a50e-fcd1e9bb1526/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-25 17:59:23,793 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc00df30-4065-4d4b-a50e-fcd1e9bb1526/bin/utaipan-eEHZpOm5b7/data/786b8dcd7/784420a0b44a4c998779fe0ca90a89a4/FLAG7c3f3abf3 [2021-11-25 17:59:24,360 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 17:59:24,360 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc00df30-4065-4d4b-a50e-fcd1e9bb1526/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-25 17:59:24,371 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc00df30-4065-4d4b-a50e-fcd1e9bb1526/bin/utaipan-eEHZpOm5b7/data/786b8dcd7/784420a0b44a4c998779fe0ca90a89a4/FLAG7c3f3abf3 [2021-11-25 17:59:24,667 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc00df30-4065-4d4b-a50e-fcd1e9bb1526/bin/utaipan-eEHZpOm5b7/data/786b8dcd7/784420a0b44a4c998779fe0ca90a89a4 [2021-11-25 17:59:24,670 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 17:59:24,672 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 17:59:24,676 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 17:59:24,677 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 17:59:24,681 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 17:59:24,681 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:59:24" (1/1) ... [2021-11-25 17:59:24,683 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fedb0d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:59:24, skipping insertion in model container [2021-11-25 17:59:24,683 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:59:24" (1/1) ... [2021-11-25 17:59:24,690 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 17:59:24,765 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 17:59:25,228 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_fc00df30-4065-4d4b-a50e-fcd1e9bb1526/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[14417,14430] [2021-11-25 17:59:25,369 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 17:59:25,382 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 17:59:25,516 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_fc00df30-4065-4d4b-a50e-fcd1e9bb1526/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[14417,14430] [2021-11-25 17:59:25,563 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 17:59:25,578 INFO L208 MainTranslator]: Completed translation [2021-11-25 17:59:25,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:59:25 WrapperNode [2021-11-25 17:59:25,579 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 17:59:25,579 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 17:59:25,580 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 17:59:25,580 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 17:59:25,585 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:59:25" (1/1) ... [2021-11-25 17:59:25,598 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:59:25" (1/1) ... [2021-11-25 17:59:25,664 INFO L137 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1181 [2021-11-25 17:59:25,664 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 17:59:25,665 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 17:59:25,665 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 17:59:25,665 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 17:59:25,675 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:59:25" (1/1) ... [2021-11-25 17:59:25,675 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:59:25" (1/1) ... [2021-11-25 17:59:25,685 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:59:25" (1/1) ... [2021-11-25 17:59:25,685 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:59:25" (1/1) ... [2021-11-25 17:59:25,702 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:59:25" (1/1) ... [2021-11-25 17:59:25,714 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:59:25" (1/1) ... [2021-11-25 17:59:25,718 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:59:25" (1/1) ... [2021-11-25 17:59:25,724 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 17:59:25,725 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 17:59:25,725 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 17:59:25,725 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 17:59:25,726 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:59:25" (1/1) ... [2021-11-25 17:59:25,733 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 17:59:25,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc00df30-4065-4d4b-a50e-fcd1e9bb1526/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:59:25,775 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc00df30-4065-4d4b-a50e-fcd1e9bb1526/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 17:59:25,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc00df30-4065-4d4b-a50e-fcd1e9bb1526/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 17:59:25,828 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 17:59:25,828 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 17:59:25,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 17:59:25,829 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 17:59:26,008 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 17:59:26,009 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 17:59:27,106 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 17:59:27,401 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 17:59:27,401 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-25 17:59:27,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:59:27 BoogieIcfgContainer [2021-11-25 17:59:27,404 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 17:59:27,407 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 17:59:27,407 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 17:59:27,410 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 17:59:27,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:59:24" (1/3) ... [2021-11-25 17:59:27,411 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e3f7691 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:59:27, skipping insertion in model container [2021-11-25 17:59:27,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:59:25" (2/3) ... [2021-11-25 17:59:27,411 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e3f7691 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:59:27, skipping insertion in model container [2021-11-25 17:59:27,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:59:27" (3/3) ... [2021-11-25 17:59:27,413 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-25 17:59:27,421 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 17:59:27,421 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 17:59:27,469 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 17:59:27,475 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 17:59:27,475 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 17:59:27,494 INFO L276 IsEmpty]: Start isEmpty. Operand has 227 states, 225 states have (on average 1.7644444444444445) internal successors, (397), 226 states have internal predecessors, (397), 0 states have call successors, (0), 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 17:59:27,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-25 17:59:27,507 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:59:27,507 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:59:27,508 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:59:27,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:59:27,512 INFO L85 PathProgramCache]: Analyzing trace with hash -614299169, now seen corresponding path program 1 times [2021-11-25 17:59:27,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:59:27,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044423563] [2021-11-25 17:59:27,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:59:27,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:59:28,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:59:28,398 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 17:59:28,399 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:59:28,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044423563] [2021-11-25 17:59:28,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044423563] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:59:28,400 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:59:28,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 17:59:28,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634345224] [2021-11-25 17:59:28,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:59:28,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:59:28,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:59:28,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:59:28,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:59:28,451 INFO L87 Difference]: Start difference. First operand has 227 states, 225 states have (on average 1.7644444444444445) internal successors, (397), 226 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 23.0) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 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 17:59:28,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:59:28,727 INFO L93 Difference]: Finished difference Result 560 states and 973 transitions. [2021-11-25 17:59:28,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 17:59:28,730 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.0) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 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 115 [2021-11-25 17:59:28,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:59:28,753 INFO L225 Difference]: With dead ends: 560 [2021-11-25 17:59:28,753 INFO L226 Difference]: Without dead ends: 389 [2021-11-25 17:59:28,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:59:28,762 INFO L933 BasicCegarLoop]: 599 mSDtfsCounter, 715 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 715 SdHoareTripleChecker+Valid, 947 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:59:28,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [715 Valid, 947 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 17:59:28,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-11-25 17:59:28,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 387. [2021-11-25 17:59:28,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 1.3419689119170986) internal successors, (518), 386 states have internal predecessors, (518), 0 states have call successors, (0), 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 17:59:28,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 518 transitions. [2021-11-25 17:59:28,868 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 518 transitions. Word has length 115 [2021-11-25 17:59:28,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:59:28,868 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 518 transitions. [2021-11-25 17:59:28,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.0) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 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 17:59:28,869 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 518 transitions. [2021-11-25 17:59:28,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-25 17:59:28,882 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:59:28,882 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, 1, 1, 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 17:59:28,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 17:59:28,883 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:59:28,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:59:28,884 INFO L85 PathProgramCache]: Analyzing trace with hash 160382172, now seen corresponding path program 1 times [2021-11-25 17:59:28,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:59:28,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706101395] [2021-11-25 17:59:28,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:59:28,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:59:28,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:59:29,224 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 17:59:29,224 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:59:29,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706101395] [2021-11-25 17:59:29,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706101395] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:59:29,225 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:59:29,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 17:59:29,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101139664] [2021-11-25 17:59:29,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:59:29,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 17:59:29,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:59:29,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 17:59:29,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-25 17:59:29,228 INFO L87 Difference]: Start difference. First operand 387 states and 518 transitions. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 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 17:59:29,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:59:29,837 INFO L93 Difference]: Finished difference Result 1333 states and 1794 transitions. [2021-11-25 17:59:29,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 17:59:29,838 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 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 121 [2021-11-25 17:59:29,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:59:29,844 INFO L225 Difference]: With dead ends: 1333 [2021-11-25 17:59:29,844 INFO L226 Difference]: Without dead ends: 996 [2021-11-25 17:59:29,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-11-25 17:59:29,857 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 2562 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2562 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 17:59:29,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2562 Valid, 564 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 17:59:29,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2021-11-25 17:59:29,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 992. [2021-11-25 17:59:29,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 991 states have (on average 1.3057517658930373) internal successors, (1294), 991 states have internal predecessors, (1294), 0 states have call successors, (0), 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 17:59:29,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1294 transitions. [2021-11-25 17:59:29,985 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1294 transitions. Word has length 121 [2021-11-25 17:59:29,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:59:29,991 INFO L470 AbstractCegarLoop]: Abstraction has 992 states and 1294 transitions. [2021-11-25 17:59:29,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 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 17:59:29,992 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1294 transitions. [2021-11-25 17:59:29,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-25 17:59:29,996 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:59:29,997 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, 1, 1, 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 17:59:29,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 17:59:29,997 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:59:30,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:59:30,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1020904745, now seen corresponding path program 1 times [2021-11-25 17:59:30,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:59:30,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892829761] [2021-11-25 17:59:30,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:59:30,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:59:30,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:59:30,322 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 17:59:30,323 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:59:30,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892829761] [2021-11-25 17:59:30,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892829761] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:59:30,323 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:59:30,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 17:59:30,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381168681] [2021-11-25 17:59:30,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:59:30,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:59:30,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:59:30,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:59:30,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:59:30,325 INFO L87 Difference]: Start difference. First operand 992 states and 1294 transitions. Second operand has 5 states, 5 states have (on average 24.2) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 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 17:59:30,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:59:30,512 INFO L93 Difference]: Finished difference Result 1766 states and 2359 transitions. [2021-11-25 17:59:30,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 17:59:30,513 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.2) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 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 121 [2021-11-25 17:59:30,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:59:30,545 INFO L225 Difference]: With dead ends: 1766 [2021-11-25 17:59:30,545 INFO L226 Difference]: Without dead ends: 1083 [2021-11-25 17:59:30,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:59:30,547 INFO L933 BasicCegarLoop]: 445 mSDtfsCounter, 497 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 497 SdHoareTripleChecker+Valid, 692 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:59:30,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [497 Valid, 692 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 17:59:30,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2021-11-25 17:59:30,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 1081. [2021-11-25 17:59:30,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1081 states, 1080 states have (on average 1.3148148148148149) internal successors, (1420), 1080 states have internal predecessors, (1420), 0 states have call successors, (0), 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 17:59:30,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1081 states to 1081 states and 1420 transitions. [2021-11-25 17:59:30,635 INFO L78 Accepts]: Start accepts. Automaton has 1081 states and 1420 transitions. Word has length 121 [2021-11-25 17:59:30,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:59:30,635 INFO L470 AbstractCegarLoop]: Abstraction has 1081 states and 1420 transitions. [2021-11-25 17:59:30,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.2) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 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 17:59:30,636 INFO L276 IsEmpty]: Start isEmpty. Operand 1081 states and 1420 transitions. [2021-11-25 17:59:30,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-25 17:59:30,638 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:59:30,639 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, 1, 1, 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 17:59:30,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 17:59:30,639 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:59:30,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:59:30,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1032350864, now seen corresponding path program 1 times [2021-11-25 17:59:30,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:59:30,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016130445] [2021-11-25 17:59:30,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:59:30,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:59:30,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:59:30,728 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 17:59:30,728 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:59:30,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016130445] [2021-11-25 17:59:30,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016130445] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:59:30,729 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:59:30,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 17:59:30,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420469697] [2021-11-25 17:59:30,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:59:30,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:59:30,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:59:30,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:59:30,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:59:30,731 INFO L87 Difference]: Start difference. First operand 1081 states and 1420 transitions. Second operand has 5 states, 5 states have (on average 24.2) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 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 17:59:30,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:59:30,953 INFO L93 Difference]: Finished difference Result 2054 states and 2701 transitions. [2021-11-25 17:59:30,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 17:59:30,954 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.2) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 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 121 [2021-11-25 17:59:30,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:59:30,961 INFO L225 Difference]: With dead ends: 2054 [2021-11-25 17:59:30,983 INFO L226 Difference]: Without dead ends: 1081 [2021-11-25 17:59:30,985 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 17:59:30,986 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 786 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 786 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:59:30,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [786 Valid, 226 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 17:59:30,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1081 states. [2021-11-25 17:59:31,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1081 to 1081. [2021-11-25 17:59:31,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1081 states, 1080 states have (on average 1.2925925925925925) internal successors, (1396), 1080 states have internal predecessors, (1396), 0 states have call successors, (0), 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 17:59:31,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1081 states to 1081 states and 1396 transitions. [2021-11-25 17:59:31,090 INFO L78 Accepts]: Start accepts. Automaton has 1081 states and 1396 transitions. Word has length 121 [2021-11-25 17:59:31,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:59:31,091 INFO L470 AbstractCegarLoop]: Abstraction has 1081 states and 1396 transitions. [2021-11-25 17:59:31,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.2) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 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 17:59:31,091 INFO L276 IsEmpty]: Start isEmpty. Operand 1081 states and 1396 transitions. [2021-11-25 17:59:31,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-25 17:59:31,094 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:59:31,094 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, 1, 1, 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 17:59:31,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 17:59:31,095 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:59:31,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:59:31,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1421290091, now seen corresponding path program 1 times [2021-11-25 17:59:31,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:59:31,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594515273] [2021-11-25 17:59:31,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:59:31,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:59:31,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:59:31,309 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 17:59:31,309 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:59:31,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594515273] [2021-11-25 17:59:31,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594515273] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:59:31,310 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:59:31,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 17:59:31,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722626751] [2021-11-25 17:59:31,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:59:31,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:59:31,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:59:31,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:59:31,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:59:31,312 INFO L87 Difference]: Start difference. First operand 1081 states and 1396 transitions. Second operand has 5 states, 5 states have (on average 24.2) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 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 17:59:31,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:59:31,599 INFO L93 Difference]: Finished difference Result 2887 states and 3755 transitions. [2021-11-25 17:59:31,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 17:59:31,599 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.2) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 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 121 [2021-11-25 17:59:31,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:59:31,610 INFO L225 Difference]: With dead ends: 2887 [2021-11-25 17:59:31,611 INFO L226 Difference]: Without dead ends: 2016 [2021-11-25 17:59:31,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:59:31,613 INFO L933 BasicCegarLoop]: 454 mSDtfsCounter, 711 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 711 SdHoareTripleChecker+Valid, 709 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:59:31,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [711 Valid, 709 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 17:59:31,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2016 states. [2021-11-25 17:59:31,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2016 to 2014. [2021-11-25 17:59:31,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2014 states, 2013 states have (on average 1.2886239443616492) internal successors, (2594), 2013 states have internal predecessors, (2594), 0 states have call successors, (0), 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 17:59:31,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2014 states to 2014 states and 2594 transitions. [2021-11-25 17:59:31,799 INFO L78 Accepts]: Start accepts. Automaton has 2014 states and 2594 transitions. Word has length 121 [2021-11-25 17:59:31,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:59:31,800 INFO L470 AbstractCegarLoop]: Abstraction has 2014 states and 2594 transitions. [2021-11-25 17:59:31,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.2) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 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 17:59:31,800 INFO L276 IsEmpty]: Start isEmpty. Operand 2014 states and 2594 transitions. [2021-11-25 17:59:31,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-25 17:59:31,804 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:59:31,805 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:59:31,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 17:59:31,805 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:59:31,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:59:31,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1545458097, now seen corresponding path program 1 times [2021-11-25 17:59:31,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:59:31,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676843609] [2021-11-25 17:59:31,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:59:31,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:59:31,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:59:32,024 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 17:59:32,024 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:59:32,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676843609] [2021-11-25 17:59:32,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676843609] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:59:32,025 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:59:32,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 17:59:32,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842834449] [2021-11-25 17:59:32,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:59:32,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:59:32,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:59:32,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:59:32,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:59:32,027 INFO L87 Difference]: Start difference. First operand 2014 states and 2594 transitions. Second operand has 5 states, 5 states have (on average 25.4) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 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 17:59:32,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:59:32,388 INFO L93 Difference]: Finished difference Result 3996 states and 5292 transitions. [2021-11-25 17:59:32,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 17:59:32,389 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.4) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 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 127 [2021-11-25 17:59:32,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:59:32,402 INFO L225 Difference]: With dead ends: 3996 [2021-11-25 17:59:32,402 INFO L226 Difference]: Without dead ends: 2423 [2021-11-25 17:59:32,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:59:32,406 INFO L933 BasicCegarLoop]: 263 mSDtfsCounter, 1203 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1203 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:59:32,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1203 Valid, 507 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 17:59:32,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2423 states. [2021-11-25 17:59:32,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2423 to 2032. [2021-11-25 17:59:32,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2032 states, 2031 states have (on average 1.2880354505169866) internal successors, (2616), 2031 states have internal predecessors, (2616), 0 states have call successors, (0), 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 17:59:32,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2032 states to 2032 states and 2616 transitions. [2021-11-25 17:59:32,649 INFO L78 Accepts]: Start accepts. Automaton has 2032 states and 2616 transitions. Word has length 127 [2021-11-25 17:59:32,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:59:32,649 INFO L470 AbstractCegarLoop]: Abstraction has 2032 states and 2616 transitions. [2021-11-25 17:59:32,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.4) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 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 17:59:32,650 INFO L276 IsEmpty]: Start isEmpty. Operand 2032 states and 2616 transitions. [2021-11-25 17:59:32,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-25 17:59:32,654 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:59:32,654 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:59:32,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 17:59:32,654 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:59:32,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:59:32,655 INFO L85 PathProgramCache]: Analyzing trace with hash -31024589, now seen corresponding path program 1 times [2021-11-25 17:59:32,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:59:32,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995307585] [2021-11-25 17:59:32,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:59:32,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:59:32,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:59:32,872 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 17:59:32,872 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:59:32,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995307585] [2021-11-25 17:59:32,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995307585] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:59:32,873 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:59:32,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 17:59:32,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114578721] [2021-11-25 17:59:32,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:59:32,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:59:32,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:59:32,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:59:32,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:59:32,875 INFO L87 Difference]: Start difference. First operand 2032 states and 2616 transitions. Second operand has 5 states, 5 states have (on average 25.4) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 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 17:59:33,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:59:33,127 INFO L93 Difference]: Finished difference Result 2036 states and 2618 transitions. [2021-11-25 17:59:33,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 17:59:33,128 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.4) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 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 127 [2021-11-25 17:59:33,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:59:33,138 INFO L225 Difference]: With dead ends: 2036 [2021-11-25 17:59:33,138 INFO L226 Difference]: Without dead ends: 1762 [2021-11-25 17:59:33,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:59:33,140 INFO L933 BasicCegarLoop]: 275 mSDtfsCounter, 715 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 715 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:59:33,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [715 Valid, 517 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 17:59:33,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1762 states. [2021-11-25 17:59:33,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1762 to 1622. [2021-11-25 17:59:33,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1622 states, 1621 states have (on average 1.2757557063541025) internal successors, (2068), 1621 states have internal predecessors, (2068), 0 states have call successors, (0), 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 17:59:33,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 2068 transitions. [2021-11-25 17:59:33,326 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 2068 transitions. Word has length 127 [2021-11-25 17:59:33,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:59:33,326 INFO L470 AbstractCegarLoop]: Abstraction has 1622 states and 2068 transitions. [2021-11-25 17:59:33,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.4) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 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 17:59:33,327 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 2068 transitions. [2021-11-25 17:59:33,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-25 17:59:33,330 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:59:33,330 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:59:33,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 17:59:33,331 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:59:33,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:59:33,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1397033387, now seen corresponding path program 1 times [2021-11-25 17:59:33,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:59:33,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745675144] [2021-11-25 17:59:33,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:59:33,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:59:33,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:59:33,558 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 17:59:33,559 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:59:33,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745675144] [2021-11-25 17:59:33,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745675144] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:59:33,559 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:59:33,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 17:59:33,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408691857] [2021-11-25 17:59:33,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:59:33,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:59:33,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:59:33,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:59:33,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:59:33,561 INFO L87 Difference]: Start difference. First operand 1622 states and 2068 transitions. Second operand has 5 states, 5 states have (on average 26.6) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 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 17:59:33,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:59:33,883 INFO L93 Difference]: Finished difference Result 2724 states and 3483 transitions. [2021-11-25 17:59:33,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 17:59:33,884 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.6) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 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 133 [2021-11-25 17:59:33,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:59:33,895 INFO L225 Difference]: With dead ends: 2724 [2021-11-25 17:59:33,895 INFO L226 Difference]: Without dead ends: 2074 [2021-11-25 17:59:33,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-25 17:59:33,898 INFO L933 BasicCegarLoop]: 278 mSDtfsCounter, 1191 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1191 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:59:33,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1191 Valid, 516 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 17:59:33,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2074 states. [2021-11-25 17:59:34,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2074 to 2072. [2021-11-25 17:59:34,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2072 states, 2071 states have (on average 1.2646064703042008) internal successors, (2619), 2071 states have internal predecessors, (2619), 0 states have call successors, (0), 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 17:59:34,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2072 states to 2072 states and 2619 transitions. [2021-11-25 17:59:34,105 INFO L78 Accepts]: Start accepts. Automaton has 2072 states and 2619 transitions. Word has length 133 [2021-11-25 17:59:34,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:59:34,105 INFO L470 AbstractCegarLoop]: Abstraction has 2072 states and 2619 transitions. [2021-11-25 17:59:34,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.6) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 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 17:59:34,106 INFO L276 IsEmpty]: Start isEmpty. Operand 2072 states and 2619 transitions. [2021-11-25 17:59:34,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-25 17:59:34,110 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:59:34,110 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:59:34,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 17:59:34,110 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:59:34,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:59:34,111 INFO L85 PathProgramCache]: Analyzing trace with hash -2112036481, now seen corresponding path program 1 times [2021-11-25 17:59:34,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:59:34,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270897402] [2021-11-25 17:59:34,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:59:34,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:59:34,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:59:47,368 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 17:59:47,369 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:59:47,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270897402] [2021-11-25 17:59:47,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270897402] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:59:47,369 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:59:47,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2021-11-25 17:59:47,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627966479] [2021-11-25 17:59:47,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:59:47,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-25 17:59:47,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:59:47,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-25 17:59:47,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=1609, Unknown=0, NotChecked=0, Total=1892 [2021-11-25 17:59:47,373 INFO L87 Difference]: Start difference. First operand 2072 states and 2619 transitions. Second operand has 44 states, 44 states have (on average 3.022727272727273) internal successors, (133), 43 states have internal predecessors, (133), 0 states have call successors, (0), 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 18:00:05,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:00:05,812 INFO L93 Difference]: Finished difference Result 3734 states and 4909 transitions. [2021-11-25 18:00:05,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-25 18:00:05,819 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.022727272727273) internal successors, (133), 43 states have internal predecessors, (133), 0 states have call successors, (0), 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 133 [2021-11-25 18:00:05,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:00:05,835 INFO L225 Difference]: With dead ends: 3734 [2021-11-25 18:00:05,835 INFO L226 Difference]: Without dead ends: 2972 [2021-11-25 18:00:05,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1434 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=1336, Invalid=5636, Unknown=0, NotChecked=0, Total=6972 [2021-11-25 18:00:05,841 INFO L933 BasicCegarLoop]: 262 mSDtfsCounter, 4073 mSDsluCounter, 3133 mSDsCounter, 0 mSdLazyCounter, 2574 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4073 SdHoareTripleChecker+Valid, 3366 SdHoareTripleChecker+Invalid, 2717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 2574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:00:05,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4073 Valid, 3366 Invalid, 2717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 2574 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2021-11-25 18:00:05,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2972 states. [2021-11-25 18:00:06,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2972 to 2714. [2021-11-25 18:00:06,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2714 states, 2713 states have (on average 1.283818650939919) internal successors, (3483), 2713 states have internal predecessors, (3483), 0 states have call successors, (0), 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 18:00:06,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2714 states to 2714 states and 3483 transitions. [2021-11-25 18:00:06,285 INFO L78 Accepts]: Start accepts. Automaton has 2714 states and 3483 transitions. Word has length 133 [2021-11-25 18:00:06,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:00:06,286 INFO L470 AbstractCegarLoop]: Abstraction has 2714 states and 3483 transitions. [2021-11-25 18:00:06,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.022727272727273) internal successors, (133), 43 states have internal predecessors, (133), 0 states have call successors, (0), 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 18:00:06,286 INFO L276 IsEmpty]: Start isEmpty. Operand 2714 states and 3483 transitions. [2021-11-25 18:00:06,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-25 18:00:06,290 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:00:06,291 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:00:06,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 18:00:06,291 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:00:06,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:00:06,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1623510684, now seen corresponding path program 1 times [2021-11-25 18:00:06,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:00:06,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839824845] [2021-11-25 18:00:06,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:00:06,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:00:06,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:00:06,458 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 18:00:06,458 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:00:06,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839824845] [2021-11-25 18:00:06,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839824845] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:00:06,458 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:00:06,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 18:00:06,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869795457] [2021-11-25 18:00:06,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:00:06,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:00:06,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:00:06,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:00:06,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:00:06,461 INFO L87 Difference]: Start difference. First operand 2714 states and 3483 transitions. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 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 18:00:07,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:00:07,380 INFO L93 Difference]: Finished difference Result 6213 states and 8003 transitions. [2021-11-25 18:00:07,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:00:07,381 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 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 133 [2021-11-25 18:00:07,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:00:07,400 INFO L225 Difference]: With dead ends: 6213 [2021-11-25 18:00:07,400 INFO L226 Difference]: Without dead ends: 3630 [2021-11-25 18:00:07,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-11-25 18:00:07,405 INFO L933 BasicCegarLoop]: 288 mSDtfsCounter, 1521 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1521 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:00:07,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1521 Valid, 647 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 18:00:07,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3630 states. [2021-11-25 18:00:08,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3630 to 3611. [2021-11-25 18:00:08,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3611 states, 3610 states have (on average 1.2490304709141273) internal successors, (4509), 3610 states have internal predecessors, (4509), 0 states have call successors, (0), 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 18:00:08,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3611 states to 3611 states and 4509 transitions. [2021-11-25 18:00:08,024 INFO L78 Accepts]: Start accepts. Automaton has 3611 states and 4509 transitions. Word has length 133 [2021-11-25 18:00:08,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:00:08,024 INFO L470 AbstractCegarLoop]: Abstraction has 3611 states and 4509 transitions. [2021-11-25 18:00:08,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 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 18:00:08,025 INFO L276 IsEmpty]: Start isEmpty. Operand 3611 states and 4509 transitions. [2021-11-25 18:00:08,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-25 18:00:08,030 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:00:08,031 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:00:08,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-25 18:00:08,031 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:00:08,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:00:08,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1612766911, now seen corresponding path program 1 times [2021-11-25 18:00:08,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:00:08,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842592599] [2021-11-25 18:00:08,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:00:08,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:00:08,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:00:31,931 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 18:00:31,931 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:00:31,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842592599] [2021-11-25 18:00:31,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842592599] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:00:31,932 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:00:31,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2021-11-25 18:00:31,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13838586] [2021-11-25 18:00:31,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:00:31,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-25 18:00:31,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:00:31,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-25 18:00:31,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1798, Unknown=0, NotChecked=0, Total=1980 [2021-11-25 18:00:31,967 INFO L87 Difference]: Start difference. First operand 3611 states and 4509 transitions. Second operand has 45 states, 45 states have (on average 2.9555555555555557) internal successors, (133), 44 states have internal predecessors, (133), 0 states have call successors, (0), 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 18:01:04,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:01:04,926 INFO L93 Difference]: Finished difference Result 8130 states and 10152 transitions. [2021-11-25 18:01:04,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-25 18:01:04,926 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.9555555555555557) internal successors, (133), 44 states have internal predecessors, (133), 0 states have call successors, (0), 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 133 [2021-11-25 18:01:04,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:01:04,948 INFO L225 Difference]: With dead ends: 8130 [2021-11-25 18:01:04,948 INFO L226 Difference]: Without dead ends: 5215 [2021-11-25 18:01:04,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1702 ImplicationChecksByTransitivity, 29.6s TimeCoverageRelationStatistics Valid=1436, Invalid=6574, Unknown=0, NotChecked=0, Total=8010 [2021-11-25 18:01:04,956 INFO L933 BasicCegarLoop]: 309 mSDtfsCounter, 2486 mSDsluCounter, 6686 mSDsCounter, 0 mSdLazyCounter, 7280 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2486 SdHoareTripleChecker+Valid, 6889 SdHoareTripleChecker+Invalid, 7358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 7280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:01:04,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2486 Valid, 6889 Invalid, 7358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 7280 Invalid, 0 Unknown, 0 Unchecked, 10.7s Time] [2021-11-25 18:01:04,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5215 states. [2021-11-25 18:01:05,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5215 to 3714. [2021-11-25 18:01:05,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3714 states, 3713 states have (on average 1.2410449771074603) internal successors, (4608), 3713 states have internal predecessors, (4608), 0 states have call successors, (0), 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 18:01:05,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3714 states to 3714 states and 4608 transitions. [2021-11-25 18:01:05,423 INFO L78 Accepts]: Start accepts. Automaton has 3714 states and 4608 transitions. Word has length 133 [2021-11-25 18:01:05,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:01:05,424 INFO L470 AbstractCegarLoop]: Abstraction has 3714 states and 4608 transitions. [2021-11-25 18:01:05,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.9555555555555557) internal successors, (133), 44 states have internal predecessors, (133), 0 states have call successors, (0), 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 18:01:05,424 INFO L276 IsEmpty]: Start isEmpty. Operand 3714 states and 4608 transitions. [2021-11-25 18:01:05,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-25 18:01:05,430 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:01:05,430 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:01:05,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-25 18:01:05,431 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:01:05,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:01:05,431 INFO L85 PathProgramCache]: Analyzing trace with hash 705336723, now seen corresponding path program 1 times [2021-11-25 18:01:05,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:01:05,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36388623] [2021-11-25 18:01:05,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:01:05,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:01:05,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:01:05,483 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 18:01:05,483 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:01:05,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36388623] [2021-11-25 18:01:05,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36388623] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:01:05,484 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:01:05,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:01:05,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817139326] [2021-11-25 18:01:05,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:01:05,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:01:05,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:01:05,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:01:05,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:01:05,486 INFO L87 Difference]: Start difference. First operand 3714 states and 4608 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 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 18:01:06,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:01:06,226 INFO L93 Difference]: Finished difference Result 6500 states and 8107 transitions. [2021-11-25 18:01:06,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:01:06,227 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 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 134 [2021-11-25 18:01:06,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:01:06,247 INFO L225 Difference]: With dead ends: 6500 [2021-11-25 18:01:06,247 INFO L226 Difference]: Without dead ends: 3996 [2021-11-25 18:01:06,250 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 18:01:06,251 INFO L933 BasicCegarLoop]: 228 mSDtfsCounter, 219 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:01:06,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 301 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:01:06,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3996 states. [2021-11-25 18:01:06,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3996 to 3670. [2021-11-25 18:01:06,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3670 states, 3669 states have (on average 1.231398201144726) internal successors, (4518), 3669 states have internal predecessors, (4518), 0 states have call successors, (0), 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 18:01:06,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3670 states to 3670 states and 4518 transitions. [2021-11-25 18:01:06,776 INFO L78 Accepts]: Start accepts. Automaton has 3670 states and 4518 transitions. Word has length 134 [2021-11-25 18:01:06,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:01:06,776 INFO L470 AbstractCegarLoop]: Abstraction has 3670 states and 4518 transitions. [2021-11-25 18:01:06,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 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 18:01:06,777 INFO L276 IsEmpty]: Start isEmpty. Operand 3670 states and 4518 transitions. [2021-11-25 18:01:06,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-25 18:01:06,782 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:01:06,782 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:01:06,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-25 18:01:06,783 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:01:06,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:01:06,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1863063984, now seen corresponding path program 1 times [2021-11-25 18:01:06,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:01:06,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082154405] [2021-11-25 18:01:06,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:01:06,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:01:06,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:01:06,849 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 18:01:06,849 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:01:06,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082154405] [2021-11-25 18:01:06,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082154405] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:01:06,850 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:01:06,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:01:06,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789444805] [2021-11-25 18:01:06,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:01:06,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:01:06,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:01:06,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:01:06,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:01:06,852 INFO L87 Difference]: Start difference. First operand 3670 states and 4518 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 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 18:01:07,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:01:07,427 INFO L93 Difference]: Finished difference Result 5234 states and 6577 transitions. [2021-11-25 18:01:07,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:01:07,428 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 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 134 [2021-11-25 18:01:07,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:01:07,435 INFO L225 Difference]: With dead ends: 5234 [2021-11-25 18:01:07,436 INFO L226 Difference]: Without dead ends: 3683 [2021-11-25 18:01:07,438 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 18:01:07,439 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 200 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:01:07,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 232 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:01:07,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3683 states. [2021-11-25 18:01:07,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3683 to 3631. [2021-11-25 18:01:07,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3631 states, 3630 states have (on average 1.2228650137741046) internal successors, (4439), 3630 states have internal predecessors, (4439), 0 states have call successors, (0), 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 18:01:07,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3631 states to 3631 states and 4439 transitions. [2021-11-25 18:01:07,841 INFO L78 Accepts]: Start accepts. Automaton has 3631 states and 4439 transitions. Word has length 134 [2021-11-25 18:01:07,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:01:07,842 INFO L470 AbstractCegarLoop]: Abstraction has 3631 states and 4439 transitions. [2021-11-25 18:01:07,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 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 18:01:07,842 INFO L276 IsEmpty]: Start isEmpty. Operand 3631 states and 4439 transitions. [2021-11-25 18:01:07,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-25 18:01:07,848 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:01:07,848 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:01:07,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-25 18:01:07,849 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:01:07,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:01:07,849 INFO L85 PathProgramCache]: Analyzing trace with hash -2026271304, now seen corresponding path program 1 times [2021-11-25 18:01:07,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:01:07,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070745016] [2021-11-25 18:01:07,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:01:07,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:01:07,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:01:07,904 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 18:01:07,905 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:01:07,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070745016] [2021-11-25 18:01:07,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070745016] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:01:07,905 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:01:07,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:01:07,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331429138] [2021-11-25 18:01:07,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:01:07,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:01:07,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:01:07,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:01:07,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:01:07,907 INFO L87 Difference]: Start difference. First operand 3631 states and 4439 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 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 18:01:08,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:01:08,669 INFO L93 Difference]: Finished difference Result 6559 states and 8080 transitions. [2021-11-25 18:01:08,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:01:08,670 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 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 134 [2021-11-25 18:01:08,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:01:08,679 INFO L225 Difference]: With dead ends: 6559 [2021-11-25 18:01:08,679 INFO L226 Difference]: Without dead ends: 4092 [2021-11-25 18:01:08,683 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 18:01:08,684 INFO L933 BasicCegarLoop]: 244 mSDtfsCounter, 208 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:01:08,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 334 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:01:08,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4092 states. [2021-11-25 18:01:09,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4092 to 3524. [2021-11-25 18:01:09,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3524 states, 3523 states have (on average 1.2162929321600908) internal successors, (4285), 3523 states have internal predecessors, (4285), 0 states have call successors, (0), 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 18:01:09,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3524 states to 3524 states and 4285 transitions. [2021-11-25 18:01:09,136 INFO L78 Accepts]: Start accepts. Automaton has 3524 states and 4285 transitions. Word has length 134 [2021-11-25 18:01:09,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:01:09,136 INFO L470 AbstractCegarLoop]: Abstraction has 3524 states and 4285 transitions. [2021-11-25 18:01:09,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 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 18:01:09,137 INFO L276 IsEmpty]: Start isEmpty. Operand 3524 states and 4285 transitions. [2021-11-25 18:01:09,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-25 18:01:09,141 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:01:09,141 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:01:09,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-25 18:01:09,142 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:01:09,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:01:09,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1883195160, now seen corresponding path program 1 times [2021-11-25 18:01:09,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:01:09,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409517018] [2021-11-25 18:01:09,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:01:09,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:01:09,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:01:09,190 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 18:01:09,190 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:01:09,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409517018] [2021-11-25 18:01:09,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409517018] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:01:09,191 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:01:09,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:01:09,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162939081] [2021-11-25 18:01:09,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:01:09,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:01:09,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:01:09,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:01:09,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:01:09,193 INFO L87 Difference]: Start difference. First operand 3524 states and 4285 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 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 18:01:09,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:01:09,914 INFO L93 Difference]: Finished difference Result 7140 states and 8807 transitions. [2021-11-25 18:01:09,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:01:09,915 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 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 134 [2021-11-25 18:01:09,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:01:09,922 INFO L225 Difference]: With dead ends: 7140 [2021-11-25 18:01:09,922 INFO L226 Difference]: Without dead ends: 4039 [2021-11-25 18:01:09,925 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 18:01:09,926 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 211 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:01:09,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 308 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:01:09,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4039 states. [2021-11-25 18:01:10,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4039 to 3465. [2021-11-25 18:01:10,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3465 states, 3464 states have (on average 1.206986143187067) internal successors, (4181), 3464 states have internal predecessors, (4181), 0 states have call successors, (0), 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 18:01:10,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3465 states to 3465 states and 4181 transitions. [2021-11-25 18:01:10,391 INFO L78 Accepts]: Start accepts. Automaton has 3465 states and 4181 transitions. Word has length 134 [2021-11-25 18:01:10,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:01:10,391 INFO L470 AbstractCegarLoop]: Abstraction has 3465 states and 4181 transitions. [2021-11-25 18:01:10,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 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 18:01:10,392 INFO L276 IsEmpty]: Start isEmpty. Operand 3465 states and 4181 transitions. [2021-11-25 18:01:10,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-25 18:01:10,396 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:01:10,396 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:01:10,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-25 18:01:10,397 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:01:10,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:01:10,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1109404638, now seen corresponding path program 1 times [2021-11-25 18:01:10,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:01:10,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892752095] [2021-11-25 18:01:10,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:01:10,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:01:10,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:01:10,455 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 18:01:10,455 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:01:10,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892752095] [2021-11-25 18:01:10,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892752095] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:01:10,455 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:01:10,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:01:10,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572711712] [2021-11-25 18:01:10,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:01:10,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:01:10,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:01:10,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:01:10,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:01:10,457 INFO L87 Difference]: Start difference. First operand 3465 states and 4181 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 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 18:01:11,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:01:11,037 INFO L93 Difference]: Finished difference Result 5802 states and 7036 transitions. [2021-11-25 18:01:11,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:01:11,037 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 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 134 [2021-11-25 18:01:11,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:01:11,044 INFO L225 Difference]: With dead ends: 5802 [2021-11-25 18:01:11,044 INFO L226 Difference]: Without dead ends: 3469 [2021-11-25 18:01:11,048 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 18:01:11,049 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 180 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:01:11,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 230 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:01:11,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3469 states. [2021-11-25 18:01:11,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3469 to 3417. [2021-11-25 18:01:11,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3417 states, 3416 states have (on average 1.1952576112412179) internal successors, (4083), 3416 states have internal predecessors, (4083), 0 states have call successors, (0), 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 18:01:11,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3417 states to 3417 states and 4083 transitions. [2021-11-25 18:01:11,488 INFO L78 Accepts]: Start accepts. Automaton has 3417 states and 4083 transitions. Word has length 134 [2021-11-25 18:01:11,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:01:11,488 INFO L470 AbstractCegarLoop]: Abstraction has 3417 states and 4083 transitions. [2021-11-25 18:01:11,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 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 18:01:11,489 INFO L276 IsEmpty]: Start isEmpty. Operand 3417 states and 4083 transitions. [2021-11-25 18:01:11,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-25 18:01:11,492 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:01:11,493 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:01:11,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-25 18:01:11,493 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:01:11,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:01:11,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1539985247, now seen corresponding path program 1 times [2021-11-25 18:01:11,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:01:11,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147917101] [2021-11-25 18:01:11,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:01:11,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:01:11,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:01:11,547 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 18:01:11,547 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:01:11,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147917101] [2021-11-25 18:01:11,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147917101] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:01:11,548 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:01:11,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:01:11,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826957907] [2021-11-25 18:01:11,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:01:11,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:01:11,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:01:11,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:01:11,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:01:11,550 INFO L87 Difference]: Start difference. First operand 3417 states and 4083 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 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 18:01:12,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:01:12,084 INFO L93 Difference]: Finished difference Result 5911 states and 7111 transitions. [2021-11-25 18:01:12,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:01:12,084 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 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 134 [2021-11-25 18:01:12,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:01:12,091 INFO L225 Difference]: With dead ends: 5911 [2021-11-25 18:01:12,092 INFO L226 Difference]: Without dead ends: 3571 [2021-11-25 18:01:12,094 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 18:01:12,095 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 184 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:01:12,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 252 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:01:12,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3571 states. [2021-11-25 18:01:12,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3571 to 3275. [2021-11-25 18:01:12,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3275 states, 3274 states have (on average 1.1878436163714112) internal successors, (3889), 3274 states have internal predecessors, (3889), 0 states have call successors, (0), 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 18:01:12,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3275 states to 3275 states and 3889 transitions. [2021-11-25 18:01:12,507 INFO L78 Accepts]: Start accepts. Automaton has 3275 states and 3889 transitions. Word has length 134 [2021-11-25 18:01:12,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:01:12,507 INFO L470 AbstractCegarLoop]: Abstraction has 3275 states and 3889 transitions. [2021-11-25 18:01:12,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 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 18:01:12,508 INFO L276 IsEmpty]: Start isEmpty. Operand 3275 states and 3889 transitions. [2021-11-25 18:01:12,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-25 18:01:12,511 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:01:12,512 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:01:12,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-25 18:01:12,512 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:01:12,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:01:12,513 INFO L85 PathProgramCache]: Analyzing trace with hash -206003554, now seen corresponding path program 1 times [2021-11-25 18:01:12,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:01:12,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931390278] [2021-11-25 18:01:12,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:01:12,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:01:12,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:01:12,572 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 18:01:12,572 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:01:12,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931390278] [2021-11-25 18:01:12,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931390278] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:01:12,572 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:01:12,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:01:12,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371296151] [2021-11-25 18:01:12,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:01:12,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:01:12,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:01:12,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:01:12,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:01:12,574 INFO L87 Difference]: Start difference. First operand 3275 states and 3889 transitions. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 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 18:01:13,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:01:13,099 INFO L93 Difference]: Finished difference Result 3874 states and 4632 transitions. [2021-11-25 18:01:13,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:01:13,102 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 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 136 [2021-11-25 18:01:13,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:01:13,109 INFO L225 Difference]: With dead ends: 3874 [2021-11-25 18:01:13,109 INFO L226 Difference]: Without dead ends: 3222 [2021-11-25 18:01:13,111 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 18:01:13,113 INFO L933 BasicCegarLoop]: 398 mSDtfsCounter, 153 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:01:13,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 607 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:01:13,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3222 states. [2021-11-25 18:01:13,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3222 to 3220. [2021-11-25 18:01:13,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3220 states, 3219 states have (on average 1.1783162472817645) internal successors, (3793), 3219 states have internal predecessors, (3793), 0 states have call successors, (0), 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 18:01:13,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3220 states to 3220 states and 3793 transitions. [2021-11-25 18:01:13,513 INFO L78 Accepts]: Start accepts. Automaton has 3220 states and 3793 transitions. Word has length 136 [2021-11-25 18:01:13,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:01:13,513 INFO L470 AbstractCegarLoop]: Abstraction has 3220 states and 3793 transitions. [2021-11-25 18:01:13,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 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 18:01:13,513 INFO L276 IsEmpty]: Start isEmpty. Operand 3220 states and 3793 transitions. [2021-11-25 18:01:13,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-25 18:01:13,517 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:01:13,517 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:01:13,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-25 18:01:13,517 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:01:13,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:01:13,518 INFO L85 PathProgramCache]: Analyzing trace with hash -287854409, now seen corresponding path program 1 times [2021-11-25 18:01:13,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:01:13,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943585328] [2021-11-25 18:01:13,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:01:13,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:01:13,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:01:32,684 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 18:01:32,685 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:01:32,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943585328] [2021-11-25 18:01:32,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943585328] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:01:32,685 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:01:32,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2021-11-25 18:01:32,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220141802] [2021-11-25 18:01:32,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:01:32,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-25 18:01:32,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:01:32,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-25 18:01:32,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=2051, Unknown=0, NotChecked=0, Total=2256 [2021-11-25 18:01:32,688 INFO L87 Difference]: Start difference. First operand 3220 states and 3793 transitions. Second operand has 48 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 47 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:01:59,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:01:59,804 INFO L93 Difference]: Finished difference Result 3342 states and 3952 transitions. [2021-11-25 18:01:59,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-25 18:01:59,805 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 47 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2021-11-25 18:01:59,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:01:59,809 INFO L225 Difference]: With dead ends: 3342 [2021-11-25 18:01:59,810 INFO L226 Difference]: Without dead ends: 3265 [2021-11-25 18:01:59,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1342 ImplicationChecksByTransitivity, 24.7s TimeCoverageRelationStatistics Valid=1194, Invalid=6116, Unknown=0, NotChecked=0, Total=7310 [2021-11-25 18:01:59,814 INFO L933 BasicCegarLoop]: 317 mSDtfsCounter, 1403 mSDsluCounter, 6017 mSDsCounter, 0 mSdLazyCounter, 6734 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1403 SdHoareTripleChecker+Valid, 6211 SdHoareTripleChecker+Invalid, 6770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 6734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:01:59,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1403 Valid, 6211 Invalid, 6770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 6734 Invalid, 0 Unknown, 0 Unchecked, 9.1s Time] [2021-11-25 18:01:59,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3265 states. [2021-11-25 18:02:00,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3265 to 3219. [2021-11-25 18:02:00,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3219 states, 3218 states have (on average 1.178060907395898) internal successors, (3791), 3218 states have internal predecessors, (3791), 0 states have call successors, (0), 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 18:02:00,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3219 states to 3219 states and 3791 transitions. [2021-11-25 18:02:00,397 INFO L78 Accepts]: Start accepts. Automaton has 3219 states and 3791 transitions. Word has length 139 [2021-11-25 18:02:00,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:02:00,397 INFO L470 AbstractCegarLoop]: Abstraction has 3219 states and 3791 transitions. [2021-11-25 18:02:00,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 47 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:02:00,398 INFO L276 IsEmpty]: Start isEmpty. Operand 3219 states and 3791 transitions. [2021-11-25 18:02:00,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-25 18:02:00,401 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:02:00,403 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:02:00,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-25 18:02:00,404 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:02:00,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:02:00,404 INFO L85 PathProgramCache]: Analyzing trace with hash 304966563, now seen corresponding path program 1 times [2021-11-25 18:02:00,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:02:00,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456941251] [2021-11-25 18:02:00,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:02:00,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:02:00,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:02:20,105 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 18:02:20,106 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:02:20,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456941251] [2021-11-25 18:02:20,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456941251] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:02:20,106 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:02:20,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2021-11-25 18:02:20,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565327926] [2021-11-25 18:02:20,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:02:20,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-25 18:02:20,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:02:20,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-25 18:02:20,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=1953, Unknown=0, NotChecked=0, Total=2256 [2021-11-25 18:02:20,108 INFO L87 Difference]: Start difference. First operand 3219 states and 3791 transitions. Second operand has 48 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 47 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:02:46,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:02:46,638 INFO L93 Difference]: Finished difference Result 3377 states and 3997 transitions. [2021-11-25 18:02:46,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-25 18:02:46,638 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 47 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2021-11-25 18:02:46,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:02:46,641 INFO L225 Difference]: With dead ends: 3377 [2021-11-25 18:02:46,641 INFO L226 Difference]: Without dead ends: 3220 [2021-11-25 18:02:46,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1491 ImplicationChecksByTransitivity, 28.0s TimeCoverageRelationStatistics Valid=1370, Invalid=6112, Unknown=0, NotChecked=0, Total=7482 [2021-11-25 18:02:46,645 INFO L933 BasicCegarLoop]: 246 mSDtfsCounter, 1777 mSDsluCounter, 2959 mSDsCounter, 0 mSdLazyCounter, 3152 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1777 SdHoareTripleChecker+Valid, 3177 SdHoareTripleChecker+Invalid, 3206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 3152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:02:46,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1777 Valid, 3177 Invalid, 3206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 3152 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2021-11-25 18:02:46,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3220 states. [2021-11-25 18:02:47,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3220 to 3218. [2021-11-25 18:02:47,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3218 states, 3217 states have (on average 1.177805408765931) internal successors, (3789), 3217 states have internal predecessors, (3789), 0 states have call successors, (0), 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 18:02:47,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3218 states to 3218 states and 3789 transitions. [2021-11-25 18:02:47,039 INFO L78 Accepts]: Start accepts. Automaton has 3218 states and 3789 transitions. Word has length 139 [2021-11-25 18:02:47,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:02:47,040 INFO L470 AbstractCegarLoop]: Abstraction has 3218 states and 3789 transitions. [2021-11-25 18:02:47,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 47 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:02:47,040 INFO L276 IsEmpty]: Start isEmpty. Operand 3218 states and 3789 transitions. [2021-11-25 18:02:47,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-25 18:02:47,044 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:02:47,044 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:02:47,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-25 18:02:47,044 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:02:47,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:02:47,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1644772842, now seen corresponding path program 1 times [2021-11-25 18:02:47,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:02:47,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305478435] [2021-11-25 18:02:47,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:02:47,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:02:47,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:02:54,709 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 18:02:54,709 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:02:54,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305478435] [2021-11-25 18:02:54,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305478435] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:02:54,709 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:02:54,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2021-11-25 18:02:54,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797491472] [2021-11-25 18:02:54,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:02:54,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-25 18:02:54,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:02:54,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-25 18:02:54,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=1379, Unknown=0, NotChecked=0, Total=1722 [2021-11-25 18:02:54,712 INFO L87 Difference]: Start difference. First operand 3218 states and 3789 transitions. Second operand has 42 states, 42 states have (on average 3.3095238095238093) internal successors, (139), 41 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:03:04,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:03:04,921 INFO L93 Difference]: Finished difference Result 5839 states and 7324 transitions. [2021-11-25 18:03:04,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-25 18:03:04,922 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.3095238095238093) internal successors, (139), 41 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2021-11-25 18:03:04,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:03:04,925 INFO L225 Difference]: With dead ends: 5839 [2021-11-25 18:03:04,925 INFO L226 Difference]: Without dead ends: 4468 [2021-11-25 18:03:04,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1393 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=944, Invalid=4458, Unknown=0, NotChecked=0, Total=5402 [2021-11-25 18:03:04,931 INFO L933 BasicCegarLoop]: 269 mSDtfsCounter, 1204 mSDsluCounter, 3299 mSDsCounter, 0 mSdLazyCounter, 3369 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1204 SdHoareTripleChecker+Valid, 3505 SdHoareTripleChecker+Invalid, 3423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 3369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:03:04,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1204 Valid, 3505 Invalid, 3423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 3369 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-11-25 18:03:04,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4468 states. [2021-11-25 18:03:05,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4468 to 4462. [2021-11-25 18:03:05,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4462 states, 4461 states have (on average 1.2190091907644025) internal successors, (5438), 4461 states have internal predecessors, (5438), 0 states have call successors, (0), 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 18:03:05,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4462 states to 4462 states and 5438 transitions. [2021-11-25 18:03:05,461 INFO L78 Accepts]: Start accepts. Automaton has 4462 states and 5438 transitions. Word has length 139 [2021-11-25 18:03:05,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:03:05,461 INFO L470 AbstractCegarLoop]: Abstraction has 4462 states and 5438 transitions. [2021-11-25 18:03:05,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.3095238095238093) internal successors, (139), 41 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:03:05,462 INFO L276 IsEmpty]: Start isEmpty. Operand 4462 states and 5438 transitions. [2021-11-25 18:03:05,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-25 18:03:05,464 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:03:05,464 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:03:05,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-25 18:03:05,464 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:03:05,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:03:05,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1560579393, now seen corresponding path program 1 times [2021-11-25 18:03:05,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:03:05,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546505441] [2021-11-25 18:03:05,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:03:05,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:03:05,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:03:28,154 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 18:03:28,154 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:03:28,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546505441] [2021-11-25 18:03:28,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546505441] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:03:28,154 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:03:28,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2021-11-25 18:03:28,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038541389] [2021-11-25 18:03:28,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:03:28,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-25 18:03:28,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:03:28,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-25 18:03:28,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=361, Invalid=1895, Unknown=0, NotChecked=0, Total=2256 [2021-11-25 18:03:28,156 INFO L87 Difference]: Start difference. First operand 4462 states and 5438 transitions. Second operand has 48 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 47 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:03:49,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:03:49,308 INFO L93 Difference]: Finished difference Result 4804 states and 5872 transitions. [2021-11-25 18:03:49,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-25 18:03:49,309 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 47 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2021-11-25 18:03:49,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:03:49,312 INFO L225 Difference]: With dead ends: 4804 [2021-11-25 18:03:49,312 INFO L226 Difference]: Without dead ends: 4463 [2021-11-25 18:03:49,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1521 ImplicationChecksByTransitivity, 22.9s TimeCoverageRelationStatistics Valid=1461, Invalid=5849, Unknown=0, NotChecked=0, Total=7310 [2021-11-25 18:03:49,316 INFO L933 BasicCegarLoop]: 307 mSDtfsCounter, 1360 mSDsluCounter, 4042 mSDsCounter, 0 mSdLazyCounter, 4322 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1360 SdHoareTripleChecker+Valid, 4298 SdHoareTripleChecker+Invalid, 4362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 4322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2021-11-25 18:03:49,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1360 Valid, 4298 Invalid, 4362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 4322 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2021-11-25 18:03:49,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4463 states. [2021-11-25 18:03:49,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4463 to 4461. [2021-11-25 18:03:49,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4461 states, 4460 states have (on average 1.218609865470852) internal successors, (5435), 4460 states have internal predecessors, (5435), 0 states have call successors, (0), 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 18:03:49,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4461 states to 4461 states and 5435 transitions. [2021-11-25 18:03:49,870 INFO L78 Accepts]: Start accepts. Automaton has 4461 states and 5435 transitions. Word has length 139 [2021-11-25 18:03:49,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:03:49,870 INFO L470 AbstractCegarLoop]: Abstraction has 4461 states and 5435 transitions. [2021-11-25 18:03:49,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 47 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:03:49,871 INFO L276 IsEmpty]: Start isEmpty. Operand 4461 states and 5435 transitions. [2021-11-25 18:03:49,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-25 18:03:49,873 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:03:49,873 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:03:49,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-25 18:03:49,873 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:03:49,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:03:49,874 INFO L85 PathProgramCache]: Analyzing trace with hash 229657911, now seen corresponding path program 1 times [2021-11-25 18:03:49,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:03:49,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814440320] [2021-11-25 18:03:49,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:03:49,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:03:50,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:04:15,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:04:15,629 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:04:15,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814440320] [2021-11-25 18:04:15,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814440320] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:04:15,629 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:04:15,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2021-11-25 18:04:15,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329572868] [2021-11-25 18:04:15,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:04:15,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-25 18:04:15,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:04:15,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-25 18:04:15,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=422, Invalid=1834, Unknown=0, NotChecked=0, Total=2256 [2021-11-25 18:04:15,632 INFO L87 Difference]: Start difference. First operand 4461 states and 5435 transitions. Second operand has 48 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 47 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:04:36,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:04:36,322 INFO L93 Difference]: Finished difference Result 5661 states and 6960 transitions. [2021-11-25 18:04:36,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-25 18:04:36,322 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 47 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2021-11-25 18:04:36,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:04:36,328 INFO L225 Difference]: With dead ends: 5661 [2021-11-25 18:04:36,328 INFO L226 Difference]: Without dead ends: 4938 [2021-11-25 18:04:36,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1671 ImplicationChecksByTransitivity, 21.6s TimeCoverageRelationStatistics Valid=1456, Invalid=5684, Unknown=0, NotChecked=0, Total=7140 [2021-11-25 18:04:36,333 INFO L933 BasicCegarLoop]: 377 mSDtfsCounter, 1549 mSDsluCounter, 3407 mSDsCounter, 0 mSdLazyCounter, 3579 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1549 SdHoareTripleChecker+Valid, 3727 SdHoareTripleChecker+Invalid, 3616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 3579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:04:36,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1549 Valid, 3727 Invalid, 3616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 3579 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2021-11-25 18:04:36,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4938 states. [2021-11-25 18:04:36,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4938 to 4460. [2021-11-25 18:04:36,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4460 states, 4459 states have (on average 1.217986095537116) internal successors, (5431), 4459 states have internal predecessors, (5431), 0 states have call successors, (0), 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 18:04:36,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4460 states to 4460 states and 5431 transitions. [2021-11-25 18:04:36,904 INFO L78 Accepts]: Start accepts. Automaton has 4460 states and 5431 transitions. Word has length 139 [2021-11-25 18:04:36,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:04:36,904 INFO L470 AbstractCegarLoop]: Abstraction has 4460 states and 5431 transitions. [2021-11-25 18:04:36,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 47 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:04:36,905 INFO L276 IsEmpty]: Start isEmpty. Operand 4460 states and 5431 transitions. [2021-11-25 18:04:36,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-25 18:04:36,908 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:04:36,908 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:04:36,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-25 18:04:36,908 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:04:36,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:04:36,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1171021157, now seen corresponding path program 1 times [2021-11-25 18:04:36,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:04:36,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856734790] [2021-11-25 18:04:36,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:04:36,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:04:37,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:04:57,078 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 18:04:57,078 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:04:57,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856734790] [2021-11-25 18:04:57,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856734790] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:04:57,078 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:04:57,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2021-11-25 18:04:57,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818243472] [2021-11-25 18:04:57,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:04:57,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-25 18:04:57,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:04:57,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-25 18:04:57,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=2062, Unknown=0, NotChecked=0, Total=2256 [2021-11-25 18:04:57,081 INFO L87 Difference]: Start difference. First operand 4460 states and 5431 transitions. Second operand has 48 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 47 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:05:29,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:05:29,189 INFO L93 Difference]: Finished difference Result 5056 states and 6180 transitions. [2021-11-25 18:05:29,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-25 18:05:29,190 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 47 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2021-11-25 18:05:29,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:05:29,194 INFO L225 Difference]: With dead ends: 5056 [2021-11-25 18:05:29,194 INFO L226 Difference]: Without dead ends: 4714 [2021-11-25 18:05:29,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1470 ImplicationChecksByTransitivity, 28.1s TimeCoverageRelationStatistics Valid=1293, Invalid=6363, Unknown=0, NotChecked=0, Total=7656 [2021-11-25 18:05:29,196 INFO L933 BasicCegarLoop]: 360 mSDtfsCounter, 1655 mSDsluCounter, 6902 mSDsCounter, 0 mSdLazyCounter, 7588 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1655 SdHoareTripleChecker+Valid, 7135 SdHoareTripleChecker+Invalid, 7624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 7588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:05:29,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1655 Valid, 7135 Invalid, 7624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 7588 Invalid, 0 Unknown, 0 Unchecked, 10.7s Time] [2021-11-25 18:05:29,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4714 states. [2021-11-25 18:05:29,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4714 to 4459. [2021-11-25 18:05:29,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4459 states, 4458 states have (on average 1.2175863615971287) internal successors, (5428), 4458 states have internal predecessors, (5428), 0 states have call successors, (0), 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 18:05:29,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4459 states to 4459 states and 5428 transitions. [2021-11-25 18:05:29,791 INFO L78 Accepts]: Start accepts. Automaton has 4459 states and 5428 transitions. Word has length 139 [2021-11-25 18:05:29,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:05:29,791 INFO L470 AbstractCegarLoop]: Abstraction has 4459 states and 5428 transitions. [2021-11-25 18:05:29,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 47 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:05:29,792 INFO L276 IsEmpty]: Start isEmpty. Operand 4459 states and 5428 transitions. [2021-11-25 18:05:29,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-25 18:05:29,794 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:05:29,794 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:05:29,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-25 18:05:29,794 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:05:29,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:05:29,795 INFO L85 PathProgramCache]: Analyzing trace with hash 870992682, now seen corresponding path program 1 times [2021-11-25 18:05:29,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:05:29,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496403211] [2021-11-25 18:05:29,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:05:29,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:05:29,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:05:38,634 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 18:05:38,635 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:05:38,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496403211] [2021-11-25 18:05:38,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496403211] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:05:38,635 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:05:38,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2021-11-25 18:05:38,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834033717] [2021-11-25 18:05:38,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:05:38,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-25 18:05:38,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:05:38,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-25 18:05:38,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=1443, Unknown=0, NotChecked=0, Total=1806 [2021-11-25 18:05:38,638 INFO L87 Difference]: Start difference. First operand 4459 states and 5428 transitions. Second operand has 43 states, 43 states have (on average 3.2325581395348837) internal successors, (139), 42 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:05:49,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:05:49,335 INFO L93 Difference]: Finished difference Result 6396 states and 8052 transitions. [2021-11-25 18:05:49,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-25 18:05:49,335 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.2325581395348837) internal successors, (139), 42 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2021-11-25 18:05:49,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:05:49,340 INFO L225 Difference]: With dead ends: 6396 [2021-11-25 18:05:49,340 INFO L226 Difference]: Without dead ends: 5261 [2021-11-25 18:05:49,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1499 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=1009, Invalid=4691, Unknown=0, NotChecked=0, Total=5700 [2021-11-25 18:05:49,343 INFO L933 BasicCegarLoop]: 364 mSDtfsCounter, 1464 mSDsluCounter, 3557 mSDsCounter, 0 mSdLazyCounter, 3555 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1464 SdHoareTripleChecker+Valid, 3844 SdHoareTripleChecker+Invalid, 3592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 3555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:05:49,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1464 Valid, 3844 Invalid, 3592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 3555 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2021-11-25 18:05:49,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5261 states. [2021-11-25 18:05:49,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5261 to 4806. [2021-11-25 18:05:49,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4806 states, 4805 states have (on average 1.227471383975026) internal successors, (5898), 4805 states have internal predecessors, (5898), 0 states have call successors, (0), 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 18:05:50,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4806 states to 4806 states and 5898 transitions. [2021-11-25 18:05:50,003 INFO L78 Accepts]: Start accepts. Automaton has 4806 states and 5898 transitions. Word has length 139 [2021-11-25 18:05:50,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:05:50,003 INFO L470 AbstractCegarLoop]: Abstraction has 4806 states and 5898 transitions. [2021-11-25 18:05:50,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.2325581395348837) internal successors, (139), 42 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:05:50,004 INFO L276 IsEmpty]: Start isEmpty. Operand 4806 states and 5898 transitions. [2021-11-25 18:05:50,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-25 18:05:50,007 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:05:50,007 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:05:50,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-25 18:05:50,008 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:05:50,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:05:50,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1851221155, now seen corresponding path program 1 times [2021-11-25 18:05:50,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:05:50,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791895668] [2021-11-25 18:05:50,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:05:50,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:05:50,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:06:11,198 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 18:06:11,198 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:06:11,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791895668] [2021-11-25 18:06:11,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791895668] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:06:11,198 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:06:11,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2021-11-25 18:06:11,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054475227] [2021-11-25 18:06:11,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:06:11,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-25 18:06:11,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:06:11,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-25 18:06:11,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=388, Invalid=1868, Unknown=0, NotChecked=0, Total=2256 [2021-11-25 18:06:11,200 INFO L87 Difference]: Start difference. First operand 4806 states and 5898 transitions. Second operand has 48 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 47 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:06:37,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:06:37,364 INFO L93 Difference]: Finished difference Result 5962 states and 7378 transitions. [2021-11-25 18:06:37,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-25 18:06:37,364 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 47 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2021-11-25 18:06:37,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:06:37,369 INFO L225 Difference]: With dead ends: 5962 [2021-11-25 18:06:37,369 INFO L226 Difference]: Without dead ends: 5209 [2021-11-25 18:06:37,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 26.1s TimeCoverageRelationStatistics Valid=1539, Invalid=6117, Unknown=0, NotChecked=0, Total=7656 [2021-11-25 18:06:37,371 INFO L933 BasicCegarLoop]: 373 mSDtfsCounter, 1569 mSDsluCounter, 3759 mSDsCounter, 0 mSdLazyCounter, 4055 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1569 SdHoareTripleChecker+Valid, 4069 SdHoareTripleChecker+Invalid, 4107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 4055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2021-11-25 18:06:37,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1569 Valid, 4069 Invalid, 4107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 4055 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2021-11-25 18:06:37,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5209 states. [2021-11-25 18:06:38,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5209 to 4805. [2021-11-25 18:06:38,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4805 states, 4804 states have (on average 1.2268942547876769) internal successors, (5894), 4804 states have internal predecessors, (5894), 0 states have call successors, (0), 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 18:06:38,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4805 states to 4805 states and 5894 transitions. [2021-11-25 18:06:38,031 INFO L78 Accepts]: Start accepts. Automaton has 4805 states and 5894 transitions. Word has length 139 [2021-11-25 18:06:38,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:06:38,031 INFO L470 AbstractCegarLoop]: Abstraction has 4805 states and 5894 transitions. [2021-11-25 18:06:38,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 47 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:06:38,032 INFO L276 IsEmpty]: Start isEmpty. Operand 4805 states and 5894 transitions. [2021-11-25 18:06:38,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-25 18:06:38,034 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:06:38,034 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:06:38,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-25 18:06:38,034 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:06:38,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:06:38,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1771576589, now seen corresponding path program 1 times [2021-11-25 18:06:38,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:06:38,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884599304] [2021-11-25 18:06:38,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:06:38,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:06:38,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:06:50,909 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 18:06:50,909 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:06:50,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884599304] [2021-11-25 18:06:50,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884599304] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:06:50,909 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:06:50,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2021-11-25 18:06:50,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515807971] [2021-11-25 18:06:50,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:06:50,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-25 18:06:50,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:06:50,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-25 18:06:50,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=1893, Unknown=0, NotChecked=0, Total=2162 [2021-11-25 18:06:50,911 INFO L87 Difference]: Start difference. First operand 4805 states and 5894 transitions. Second operand has 47 states, 47 states have (on average 2.9574468085106385) internal successors, (139), 46 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:07:11,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:07:11,661 INFO L93 Difference]: Finished difference Result 5929 states and 7344 transitions. [2021-11-25 18:07:11,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-25 18:07:11,661 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.9574468085106385) internal successors, (139), 46 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2021-11-25 18:07:11,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:07:11,665 INFO L225 Difference]: With dead ends: 5929 [2021-11-25 18:07:11,665 INFO L226 Difference]: Without dead ends: 5223 [2021-11-25 18:07:11,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1405 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=1292, Invalid=5848, Unknown=0, NotChecked=0, Total=7140 [2021-11-25 18:07:11,668 INFO L933 BasicCegarLoop]: 362 mSDtfsCounter, 1694 mSDsluCounter, 3904 mSDsCounter, 0 mSdLazyCounter, 3642 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1694 SdHoareTripleChecker+Valid, 4202 SdHoareTripleChecker+Invalid, 3684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 3642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:07:11,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1694 Valid, 4202 Invalid, 3684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 3642 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-11-25 18:07:11,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5223 states. [2021-11-25 18:07:12,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5223 to 4804. [2021-11-25 18:07:12,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4804 states, 4803 states have (on average 1.2263168852800332) internal successors, (5890), 4803 states have internal predecessors, (5890), 0 states have call successors, (0), 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 18:07:12,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4804 states to 4804 states and 5890 transitions. [2021-11-25 18:07:12,330 INFO L78 Accepts]: Start accepts. Automaton has 4804 states and 5890 transitions. Word has length 139 [2021-11-25 18:07:12,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:07:12,331 INFO L470 AbstractCegarLoop]: Abstraction has 4804 states and 5890 transitions. [2021-11-25 18:07:12,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.9574468085106385) internal successors, (139), 46 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:07:12,331 INFO L276 IsEmpty]: Start isEmpty. Operand 4804 states and 5890 transitions. [2021-11-25 18:07:12,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-25 18:07:12,333 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:07:12,333 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:07:12,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-25 18:07:12,333 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:07:12,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:07:12,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1122711639, now seen corresponding path program 1 times [2021-11-25 18:07:12,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:07:12,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171082440] [2021-11-25 18:07:12,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:07:12,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:07:12,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:07:24,396 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 18:07:24,397 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:07:24,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171082440] [2021-11-25 18:07:24,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171082440] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:07:24,397 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:07:24,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2021-11-25 18:07:24,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263094067] [2021-11-25 18:07:24,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:07:24,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-25 18:07:24,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:07:24,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-25 18:07:24,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=1978, Unknown=0, NotChecked=0, Total=2256 [2021-11-25 18:07:24,399 INFO L87 Difference]: Start difference. First operand 4804 states and 5890 transitions. Second operand has 48 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 47 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:07:41,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:07:41,903 INFO L93 Difference]: Finished difference Result 5162 states and 6340 transitions. [2021-11-25 18:07:41,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-25 18:07:41,904 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 47 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2021-11-25 18:07:41,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:07:41,908 INFO L225 Difference]: With dead ends: 5162 [2021-11-25 18:07:41,908 INFO L226 Difference]: Without dead ends: 4834 [2021-11-25 18:07:41,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1477 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=1332, Invalid=6150, Unknown=0, NotChecked=0, Total=7482 [2021-11-25 18:07:41,911 INFO L933 BasicCegarLoop]: 352 mSDtfsCounter, 1341 mSDsluCounter, 3525 mSDsCounter, 0 mSdLazyCounter, 3273 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1341 SdHoareTripleChecker+Valid, 3843 SdHoareTripleChecker+Invalid, 3306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 3273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:07:41,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1341 Valid, 3843 Invalid, 3306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 3273 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2021-11-25 18:07:41,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4834 states. [2021-11-25 18:07:42,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4834 to 4803. [2021-11-25 18:07:42,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4803 states, 4802 states have (on average 1.2259475218658893) internal successors, (5887), 4802 states have internal predecessors, (5887), 0 states have call successors, (0), 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 18:07:42,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4803 states to 4803 states and 5887 transitions. [2021-11-25 18:07:42,612 INFO L78 Accepts]: Start accepts. Automaton has 4803 states and 5887 transitions. Word has length 139 [2021-11-25 18:07:42,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:07:42,612 INFO L470 AbstractCegarLoop]: Abstraction has 4803 states and 5887 transitions. [2021-11-25 18:07:42,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 47 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:07:42,612 INFO L276 IsEmpty]: Start isEmpty. Operand 4803 states and 5887 transitions. [2021-11-25 18:07:42,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-25 18:07:42,614 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:07:42,614 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:07:42,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-25 18:07:42,615 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:07:42,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:07:42,615 INFO L85 PathProgramCache]: Analyzing trace with hash 31494487, now seen corresponding path program 1 times [2021-11-25 18:07:42,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:07:42,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177801737] [2021-11-25 18:07:42,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:07:42,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:07:42,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:08:04,232 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 18:08:04,232 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:08:04,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177801737] [2021-11-25 18:08:04,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177801737] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:08:04,232 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:08:04,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2021-11-25 18:08:04,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690032467] [2021-11-25 18:08:04,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:08:04,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-25 18:08:04,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:08:04,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-25 18:08:04,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=2069, Unknown=0, NotChecked=0, Total=2256 [2021-11-25 18:08:04,234 INFO L87 Difference]: Start difference. First operand 4803 states and 5887 transitions. Second operand has 48 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 47 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:35,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:08:35,912 INFO L93 Difference]: Finished difference Result 5543 states and 6826 transitions. [2021-11-25 18:08:35,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-25 18:08:35,912 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 47 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2021-11-25 18:08:35,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:08:35,916 INFO L225 Difference]: With dead ends: 5543 [2021-11-25 18:08:35,916 INFO L226 Difference]: Without dead ends: 4833 [2021-11-25 18:08:35,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1598 ImplicationChecksByTransitivity, 30.8s TimeCoverageRelationStatistics Valid=1533, Invalid=7209, Unknown=0, NotChecked=0, Total=8742 [2021-11-25 18:08:35,919 INFO L933 BasicCegarLoop]: 296 mSDtfsCounter, 2381 mSDsluCounter, 5774 mSDsCounter, 0 mSdLazyCounter, 6654 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2381 SdHoareTripleChecker+Valid, 6020 SdHoareTripleChecker+Invalid, 6705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 6654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2021-11-25 18:08:35,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2381 Valid, 6020 Invalid, 6705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 6654 Invalid, 0 Unknown, 0 Unchecked, 8.6s Time] [2021-11-25 18:08:35,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4833 states. [2021-11-25 18:08:36,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4833 to 4802. [2021-11-25 18:08:36,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4802 states, 4801 states have (on average 1.2253697146427827) internal successors, (5883), 4801 states have internal predecessors, (5883), 0 states have call successors, (0), 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 18:08:36,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4802 states to 4802 states and 5883 transitions. [2021-11-25 18:08:36,652 INFO L78 Accepts]: Start accepts. Automaton has 4802 states and 5883 transitions. Word has length 139 [2021-11-25 18:08:36,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:08:36,652 INFO L470 AbstractCegarLoop]: Abstraction has 4802 states and 5883 transitions. [2021-11-25 18:08:36,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 47 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:36,652 INFO L276 IsEmpty]: Start isEmpty. Operand 4802 states and 5883 transitions. [2021-11-25 18:08:36,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-25 18:08:36,654 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:08:36,654 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:08:36,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-25 18:08:36,655 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:08:36,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:08:36,655 INFO L85 PathProgramCache]: Analyzing trace with hash -671088830, now seen corresponding path program 1 times [2021-11-25 18:08:36,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:08:36,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377424921] [2021-11-25 18:08:36,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:08:36,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:08:36,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:08:37,415 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 18:08:37,415 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:08:37,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377424921] [2021-11-25 18:08:37,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377424921] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:08:37,416 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:08:37,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-25 18:08:37,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970051470] [2021-11-25 18:08:37,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:08:37,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-25 18:08:37,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:08:37,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-25 18:08:37,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-11-25 18:08:37,417 INFO L87 Difference]: Start difference. First operand 4802 states and 5883 transitions. Second operand has 18 states, 18 states have (on average 7.833333333333333) internal successors, (141), 18 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:40,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:08:40,904 INFO L93 Difference]: Finished difference Result 17861 states and 23548 transitions. [2021-11-25 18:08:40,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-25 18:08:40,905 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 7.833333333333333) internal successors, (141), 18 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2021-11-25 18:08:40,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:08:40,921 INFO L225 Difference]: With dead ends: 17861 [2021-11-25 18:08:40,922 INFO L226 Difference]: Without dead ends: 14862 [2021-11-25 18:08:40,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=163, Invalid=767, Unknown=0, NotChecked=0, Total=930 [2021-11-25 18:08:40,927 INFO L933 BasicCegarLoop]: 222 mSDtfsCounter, 1210 mSDsluCounter, 2069 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1210 SdHoareTripleChecker+Valid, 2239 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:08:40,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1210 Valid, 2239 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 862 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 18:08:40,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14862 states. [2021-11-25 18:08:42,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14862 to 6662. [2021-11-25 18:08:42,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6662 states, 6661 states have (on average 1.2357003452934994) internal successors, (8231), 6661 states have internal predecessors, (8231), 0 states have call successors, (0), 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 18:08:42,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6662 states to 6662 states and 8231 transitions. [2021-11-25 18:08:42,191 INFO L78 Accepts]: Start accepts. Automaton has 6662 states and 8231 transitions. Word has length 141 [2021-11-25 18:08:42,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:08:42,192 INFO L470 AbstractCegarLoop]: Abstraction has 6662 states and 8231 transitions. [2021-11-25 18:08:42,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.833333333333333) internal successors, (141), 18 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:42,192 INFO L276 IsEmpty]: Start isEmpty. Operand 6662 states and 8231 transitions. [2021-11-25 18:08:42,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-25 18:08:42,194 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:08:42,195 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:08:42,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-25 18:08:42,195 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:08:42,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:08:42,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1292101867, now seen corresponding path program 1 times [2021-11-25 18:08:42,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:08:42,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400751176] [2021-11-25 18:08:42,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:08:42,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:08:42,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:09:08,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:09:08,215 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:09:08,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400751176] [2021-11-25 18:09:08,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400751176] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:09:08,215 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:09:08,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2021-11-25 18:09:08,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090698012] [2021-11-25 18:09:08,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:09:08,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-25 18:09:08,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:09:08,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-25 18:09:08,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=1962, Unknown=0, NotChecked=0, Total=2256 [2021-11-25 18:09:08,218 INFO L87 Difference]: Start difference. First operand 6662 states and 8231 transitions. Second operand has 48 states, 48 states have (on average 3.0208333333333335) internal successors, (145), 47 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:09:35,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:09:35,410 INFO L93 Difference]: Finished difference Result 7019 states and 8678 transitions. [2021-11-25 18:09:35,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-25 18:09:35,410 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.0208333333333335) internal successors, (145), 47 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-11-25 18:09:35,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:09:35,417 INFO L225 Difference]: With dead ends: 7019 [2021-11-25 18:09:35,417 INFO L226 Difference]: Without dead ends: 6739 [2021-11-25 18:09:35,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1278 ImplicationChecksByTransitivity, 28.5s TimeCoverageRelationStatistics Valid=1308, Invalid=5334, Unknown=0, NotChecked=0, Total=6642 [2021-11-25 18:09:35,419 INFO L933 BasicCegarLoop]: 354 mSDtfsCounter, 1537 mSDsluCounter, 3703 mSDsCounter, 0 mSdLazyCounter, 3990 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1537 SdHoareTripleChecker+Valid, 3991 SdHoareTripleChecker+Invalid, 4050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 3990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2021-11-25 18:09:35,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1537 Valid, 3991 Invalid, 4050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 3990 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2021-11-25 18:09:35,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6739 states. [2021-11-25 18:09:36,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6739 to 6661. [2021-11-25 18:09:36,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6661 states, 6660 states have (on average 1.2355855855855855) internal successors, (8229), 6660 states have internal predecessors, (8229), 0 states have call successors, (0), 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 18:09:36,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6661 states to 6661 states and 8229 transitions. [2021-11-25 18:09:36,608 INFO L78 Accepts]: Start accepts. Automaton has 6661 states and 8229 transitions. Word has length 145 [2021-11-25 18:09:36,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:09:36,608 INFO L470 AbstractCegarLoop]: Abstraction has 6661 states and 8229 transitions. [2021-11-25 18:09:36,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.0208333333333335) internal successors, (145), 47 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:09:36,608 INFO L276 IsEmpty]: Start isEmpty. Operand 6661 states and 8229 transitions. [2021-11-25 18:09:36,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-25 18:09:36,611 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:09:36,611 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:09:36,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-25 18:09:36,611 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:09:36,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:09:36,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1752579294, now seen corresponding path program 1 times [2021-11-25 18:09:36,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:09:36,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980840349] [2021-11-25 18:09:36,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:09:36,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:09:36,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:09:46,089 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 18:09:46,089 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:09:46,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980840349] [2021-11-25 18:09:46,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980840349] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:09:46,089 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:09:46,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2021-11-25 18:09:46,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119625549] [2021-11-25 18:09:46,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:09:46,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-25 18:09:46,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:09:46,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-25 18:09:46,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=1995, Unknown=0, NotChecked=0, Total=2256 [2021-11-25 18:09:46,091 INFO L87 Difference]: Start difference. First operand 6661 states and 8229 transitions. Second operand has 48 states, 48 states have (on average 3.0208333333333335) internal successors, (145), 47 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:10:04,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:10:04,292 INFO L93 Difference]: Finished difference Result 7518 states and 9362 transitions. [2021-11-25 18:10:04,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-25 18:10:04,293 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.0208333333333335) internal successors, (145), 47 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-11-25 18:10:04,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:10:04,299 INFO L225 Difference]: With dead ends: 7518 [2021-11-25 18:10:04,299 INFO L226 Difference]: Without dead ends: 7262 [2021-11-25 18:10:04,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1769 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=1113, Invalid=6197, Unknown=0, NotChecked=0, Total=7310 [2021-11-25 18:10:04,301 INFO L933 BasicCegarLoop]: 355 mSDtfsCounter, 1160 mSDsluCounter, 4776 mSDsCounter, 0 mSdLazyCounter, 4860 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1160 SdHoareTripleChecker+Valid, 5021 SdHoareTripleChecker+Invalid, 4915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 4860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:10:04,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1160 Valid, 5021 Invalid, 4915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 4860 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2021-11-25 18:10:04,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7262 states. [2021-11-25 18:10:05,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7262 to 6769. [2021-11-25 18:10:05,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6769 states, 6768 states have (on average 1.236258865248227) internal successors, (8367), 6768 states have internal predecessors, (8367), 0 states have call successors, (0), 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 18:10:05,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6769 states to 6769 states and 8367 transitions. [2021-11-25 18:10:05,546 INFO L78 Accepts]: Start accepts. Automaton has 6769 states and 8367 transitions. Word has length 145 [2021-11-25 18:10:05,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:10:05,547 INFO L470 AbstractCegarLoop]: Abstraction has 6769 states and 8367 transitions. [2021-11-25 18:10:05,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.0208333333333335) internal successors, (145), 47 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:10:05,547 INFO L276 IsEmpty]: Start isEmpty. Operand 6769 states and 8367 transitions. [2021-11-25 18:10:05,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-25 18:10:05,549 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:10:05,550 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:10:05,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-11-25 18:10:05,550 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:10:05,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:10:05,550 INFO L85 PathProgramCache]: Analyzing trace with hash 845847822, now seen corresponding path program 1 times [2021-11-25 18:10:05,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:10:05,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955594662] [2021-11-25 18:10:05,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:10:05,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:10:05,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:10:17,338 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 18:10:17,338 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:10:17,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955594662] [2021-11-25 18:10:17,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955594662] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:10:17,338 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:10:17,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2021-11-25 18:10:17,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873584812] [2021-11-25 18:10:17,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:10:17,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-25 18:10:17,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:10:17,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-25 18:10:17,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=1901, Unknown=0, NotChecked=0, Total=2162 [2021-11-25 18:10:17,340 INFO L87 Difference]: Start difference. First operand 6769 states and 8367 transitions. Second operand has 47 states, 47 states have (on average 3.0851063829787235) internal successors, (145), 46 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:10:33,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:10:33,802 INFO L93 Difference]: Finished difference Result 8343 states and 10445 transitions. [2021-11-25 18:10:33,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-25 18:10:33,803 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.0851063829787235) internal successors, (145), 46 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-11-25 18:10:33,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:10:33,809 INFO L225 Difference]: With dead ends: 8343 [2021-11-25 18:10:33,809 INFO L226 Difference]: Without dead ends: 7810 [2021-11-25 18:10:33,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1692 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=958, Invalid=6014, Unknown=0, NotChecked=0, Total=6972 [2021-11-25 18:10:33,810 INFO L933 BasicCegarLoop]: 428 mSDtfsCounter, 1512 mSDsluCounter, 6763 mSDsCounter, 0 mSdLazyCounter, 7176 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1512 SdHoareTripleChecker+Valid, 7038 SdHoareTripleChecker+Invalid, 7223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 7176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:10:33,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1512 Valid, 7038 Invalid, 7223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 7176 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2021-11-25 18:10:33,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7810 states. [2021-11-25 18:10:35,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7810 to 6995. [2021-11-25 18:10:35,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6995 states, 6994 states have (on average 1.2377752359165) internal successors, (8657), 6994 states have internal predecessors, (8657), 0 states have call successors, (0), 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 18:10:35,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6995 states to 6995 states and 8657 transitions. [2021-11-25 18:10:35,038 INFO L78 Accepts]: Start accepts. Automaton has 6995 states and 8657 transitions. Word has length 145 [2021-11-25 18:10:35,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:10:35,039 INFO L470 AbstractCegarLoop]: Abstraction has 6995 states and 8657 transitions. [2021-11-25 18:10:35,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.0851063829787235) internal successors, (145), 46 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:10:35,039 INFO L276 IsEmpty]: Start isEmpty. Operand 6995 states and 8657 transitions. [2021-11-25 18:10:35,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-25 18:10:35,041 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:10:35,041 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:10:35,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-25 18:10:35,041 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:10:35,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:10:35,042 INFO L85 PathProgramCache]: Analyzing trace with hash -2054824150, now seen corresponding path program 1 times [2021-11-25 18:10:35,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:10:35,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592414805] [2021-11-25 18:10:35,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:10:35,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:10:35,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:10:44,343 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 18:10:44,343 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:10:44,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592414805] [2021-11-25 18:10:44,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592414805] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:10:44,343 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:10:44,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2021-11-25 18:10:44,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136670282] [2021-11-25 18:10:44,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:10:44,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-25 18:10:44,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:10:44,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-25 18:10:44,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1943, Unknown=0, NotChecked=0, Total=2162 [2021-11-25 18:10:44,345 INFO L87 Difference]: Start difference. First operand 6995 states and 8657 transitions. Second operand has 47 states, 47 states have (on average 3.0851063829787235) internal successors, (145), 46 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:11:00,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:11:00,289 INFO L93 Difference]: Finished difference Result 8429 states and 10547 transitions. [2021-11-25 18:11:00,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-25 18:11:00,290 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.0851063829787235) internal successors, (145), 46 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-11-25 18:11:00,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:11:00,297 INFO L225 Difference]: With dead ends: 8429 [2021-11-25 18:11:00,297 INFO L226 Difference]: Without dead ends: 7896 [2021-11-25 18:11:00,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1616 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=1035, Invalid=6105, Unknown=0, NotChecked=0, Total=7140 [2021-11-25 18:11:00,300 INFO L933 BasicCegarLoop]: 363 mSDtfsCounter, 1341 mSDsluCounter, 5019 mSDsCounter, 0 mSdLazyCounter, 5097 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1341 SdHoareTripleChecker+Valid, 5269 SdHoareTripleChecker+Invalid, 5151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 5097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:11:00,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1341 Valid, 5269 Invalid, 5151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 5097 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2021-11-25 18:11:00,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7896 states. [2021-11-25 18:11:01,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7896 to 7103. [2021-11-25 18:11:01,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7103 states, 7102 states have (on average 1.2388059701492538) internal successors, (8798), 7102 states have internal predecessors, (8798), 0 states have call successors, (0), 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 18:11:01,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7103 states to 7103 states and 8798 transitions. [2021-11-25 18:11:01,637 INFO L78 Accepts]: Start accepts. Automaton has 7103 states and 8798 transitions. Word has length 145 [2021-11-25 18:11:01,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:11:01,637 INFO L470 AbstractCegarLoop]: Abstraction has 7103 states and 8798 transitions. [2021-11-25 18:11:01,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.0851063829787235) internal successors, (145), 46 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:11:01,637 INFO L276 IsEmpty]: Start isEmpty. Operand 7103 states and 8798 transitions. [2021-11-25 18:11:01,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-25 18:11:01,640 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:11:01,640 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:11:01,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-11-25 18:11:01,640 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:11:01,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:11:01,641 INFO L85 PathProgramCache]: Analyzing trace with hash -207945822, now seen corresponding path program 1 times [2021-11-25 18:11:01,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:11:01,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751385248] [2021-11-25 18:11:01,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:11:01,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:11:01,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:11:14,023 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 18:11:14,023 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:11:14,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751385248] [2021-11-25 18:11:14,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751385248] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:11:14,024 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:11:14,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2021-11-25 18:11:14,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974918113] [2021-11-25 18:11:14,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:11:14,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-25 18:11:14,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:11:14,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-25 18:11:14,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1947, Unknown=0, NotChecked=0, Total=2162 [2021-11-25 18:11:14,025 INFO L87 Difference]: Start difference. First operand 7103 states and 8798 transitions. Second operand has 47 states, 47 states have (on average 3.0851063829787235) internal successors, (145), 46 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)