./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 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503db3d2-0e1a-489a-8802-10519791071b/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503db3d2-0e1a-489a-8802-10519791071b/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503db3d2-0e1a-489a-8802-10519791071b/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503db3d2-0e1a-489a-8802-10519791071b/bin/utaipan-UbGMyvGFUs/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_503db3d2-0e1a-489a-8802-10519791071b/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503db3d2-0e1a-489a-8802-10519791071b/bin/utaipan-UbGMyvGFUs --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 0.2.1-dev-0f8a17c [2021-11-19 14:01:42,395 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:01:42,397 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:01:42,448 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:01:42,449 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:01:42,454 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:01:42,457 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:01:42,462 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:01:42,465 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:01:42,471 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:01:42,472 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:01:42,474 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:01:42,475 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:01:42,478 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:01:42,481 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:01:42,483 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:01:42,485 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:01:42,486 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:01:42,490 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:01:42,499 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:01:42,501 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:01:42,502 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:01:42,506 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:01:42,507 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:01:42,511 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:01:42,511 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:01:42,512 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:01:42,514 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:01:42,515 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:01:42,516 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:01:42,517 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:01:42,518 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:01:42,520 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:01:42,521 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:01:42,523 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:01:42,523 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:01:42,524 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:01:42,524 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:01:42,524 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:01:42,525 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:01:42,526 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:01:42,527 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503db3d2-0e1a-489a-8802-10519791071b/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 14:01:42,577 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:01:42,577 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:01:42,578 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:01:42,579 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:01:42,579 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:01:42,579 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:01:42,580 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:01:42,580 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:01:42,580 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:01:42,580 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:01:42,581 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:01:42,582 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:01:42,582 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:01:42,582 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:01:42,582 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:01:42,583 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:01:42,583 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:01:42,584 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:01:42,584 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:01:42,584 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:01:42,584 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:01:42,585 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:01:42,585 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:01:42,585 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:01:42,585 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:01:42,586 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:01:42,586 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:01:42,586 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:01:42,586 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:01:42,588 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:01:42,588 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:01:42,589 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:01:42,589 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:01:42,589 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:01:42,589 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:01:42,590 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:01:42,590 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:01:42,591 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:01:42,591 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:01:42,591 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:01:42,591 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_503db3d2-0e1a-489a-8802-10519791071b/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503db3d2-0e1a-489a-8802-10519791071b/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f65c5712bd883a6886a8bc01d4e0133fd034d0de7d6cdf4a43830b50c44bd44 [2021-11-19 14:01:42,919 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:01:42,948 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:01:42,952 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:01:42,953 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:01:42,954 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:01:42,955 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503db3d2-0e1a-489a-8802-10519791071b/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-19 14:01:43,033 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503db3d2-0e1a-489a-8802-10519791071b/bin/utaipan-UbGMyvGFUs/data/8ac7aa0d8/b6b63e7b4bed44149fdbdfb152439a32/FLAG308cdb32c [2021-11-19 14:01:43,662 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:01:43,663 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503db3d2-0e1a-489a-8802-10519791071b/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-19 14:01:43,693 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503db3d2-0e1a-489a-8802-10519791071b/bin/utaipan-UbGMyvGFUs/data/8ac7aa0d8/b6b63e7b4bed44149fdbdfb152439a32/FLAG308cdb32c [2021-11-19 14:01:43,914 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503db3d2-0e1a-489a-8802-10519791071b/bin/utaipan-UbGMyvGFUs/data/8ac7aa0d8/b6b63e7b4bed44149fdbdfb152439a32 [2021-11-19 14:01:43,917 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:01:43,919 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:01:43,921 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:01:43,921 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:01:43,925 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:01:43,926 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:01:43" (1/1) ... [2021-11-19 14:01:43,928 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10485185 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:01:43, skipping insertion in model container [2021-11-19 14:01:43,928 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:01:43" (1/1) ... [2021-11-19 14:01:43,937 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:01:44,008 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:01:44,398 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_503db3d2-0e1a-489a-8802-10519791071b/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[14417,14430] [2021-11-19 14:01:44,515 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:01:44,530 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:01:44,702 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_503db3d2-0e1a-489a-8802-10519791071b/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[14417,14430] [2021-11-19 14:01:44,764 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:01:44,790 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:01:44,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:01:44 WrapperNode [2021-11-19 14:01:44,790 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:01:44,791 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:01:44,792 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:01:44,792 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:01:44,800 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:01:44" (1/1) ... [2021-11-19 14:01:44,842 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:01:44" (1/1) ... [2021-11-19 14:01:44,918 INFO L137 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1181 [2021-11-19 14:01:44,918 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:01:44,919 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:01:44,919 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:01:44,920 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:01:44,930 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:01:44" (1/1) ... [2021-11-19 14:01:44,931 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:01:44" (1/1) ... [2021-11-19 14:01:44,937 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:01:44" (1/1) ... [2021-11-19 14:01:44,938 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:01:44" (1/1) ... [2021-11-19 14:01:44,959 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:01:44" (1/1) ... [2021-11-19 14:01:44,974 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:01:44" (1/1) ... [2021-11-19 14:01:44,978 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:01:44" (1/1) ... [2021-11-19 14:01:44,985 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:01:44,986 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:01:44,987 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:01:44,987 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:01:44,988 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:01:44" (1/1) ... [2021-11-19 14:01:45,013 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:01:45,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503db3d2-0e1a-489a-8802-10519791071b/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:01:45,057 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503db3d2-0e1a-489a-8802-10519791071b/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:01:45,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503db3d2-0e1a-489a-8802-10519791071b/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:01:45,113 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:01:45,113 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 14:01:45,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:01:45,115 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:01:45,311 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:01:45,312 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:01:46,533 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:01:46,931 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:01:46,931 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-19 14:01:46,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:01:46 BoogieIcfgContainer [2021-11-19 14:01:46,936 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:01:46,938 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:01:46,938 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:01:46,942 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:01:46,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:01:43" (1/3) ... [2021-11-19 14:01:46,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f5dc843 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:01:46, skipping insertion in model container [2021-11-19 14:01:46,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:01:44" (2/3) ... [2021-11-19 14:01:46,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f5dc843 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:01:46, skipping insertion in model container [2021-11-19 14:01:46,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:01:46" (3/3) ... [2021-11-19 14:01:46,946 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-19 14:01:46,955 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:01:46,956 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:01:47,025 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:01:47,036 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 [2021-11-19 14:01:47,037 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 14:01:47,065 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) [2021-11-19 14:01:47,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-19 14:01:47,089 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:01:47,090 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] [2021-11-19 14:01:47,091 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:01:47,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:47,096 INFO L85 PathProgramCache]: Analyzing trace with hash -614299169, now seen corresponding path program 1 times [2021-11-19 14:01:47,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:01:47,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21700977] [2021-11-19 14:01:47,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:47,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:01:47,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:48,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:01:48,150 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:01:48,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21700977] [2021-11-19 14:01:48,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21700977] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:01:48,151 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:01:48,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 14:01:48,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429207056] [2021-11-19 14:01:48,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:01:48,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:01:48,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:01:48,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:01:48,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:01:48,192 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) [2021-11-19 14:01:48,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:01:48,443 INFO L93 Difference]: Finished difference Result 560 states and 973 transitions. [2021-11-19 14:01:48,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:01:48,446 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 [2021-11-19 14:01:48,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:01:48,470 INFO L225 Difference]: With dead ends: 560 [2021-11-19 14:01:48,471 INFO L226 Difference]: Without dead ends: 389 [2021-11-19 14:01:48,476 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 [2021-11-19 14:01:48,487 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 [2021-11-19 14:01:48,488 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] [2021-11-19 14:01:48,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-11-19 14:01:48,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 387. [2021-11-19 14:01:48,588 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) [2021-11-19 14:01:48,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 518 transitions. [2021-11-19 14:01:48,592 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 518 transitions. Word has length 115 [2021-11-19 14:01:48,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:01:48,593 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 518 transitions. [2021-11-19 14:01:48,593 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) [2021-11-19 14:01:48,593 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 518 transitions. [2021-11-19 14:01:48,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-19 14:01:48,597 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:01:48,597 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] [2021-11-19 14:01:48,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 14:01:48,598 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:01:48,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:48,599 INFO L85 PathProgramCache]: Analyzing trace with hash 160382172, now seen corresponding path program 1 times [2021-11-19 14:01:48,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:01:48,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524802420] [2021-11-19 14:01:48,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:48,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:01:48,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:48,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:01:48,861 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:01:48,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524802420] [2021-11-19 14:01:48,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524802420] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:01:48,862 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:01:48,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-19 14:01:48,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849464169] [2021-11-19 14:01:48,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:01:48,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:01:48,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:01:48,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:01:48,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:01:48,868 INFO L87 Difference]: Start difference. First operand 387 states and 518 transitions. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 7 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) [2021-11-19 14:01:49,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:01:49,574 INFO L93 Difference]: Finished difference Result 1333 states and 1794 transitions. [2021-11-19 14:01:49,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:01:49,575 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 7 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 [2021-11-19 14:01:49,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:01:49,581 INFO L225 Difference]: With dead ends: 1333 [2021-11-19 14:01:49,581 INFO L226 Difference]: Without dead ends: 996 [2021-11-19 14:01:49,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:01:49,585 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 2644 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2644 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:01:49,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2644 Valid, 580 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 14:01:49,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2021-11-19 14:01:49,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 992. [2021-11-19 14:01:49,657 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) [2021-11-19 14:01:49,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1294 transitions. [2021-11-19 14:01:49,673 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1294 transitions. Word has length 121 [2021-11-19 14:01:49,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:01:49,674 INFO L470 AbstractCegarLoop]: Abstraction has 992 states and 1294 transitions. [2021-11-19 14:01:49,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 7 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) [2021-11-19 14:01:49,675 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1294 transitions. [2021-11-19 14:01:49,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-19 14:01:49,680 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:01:49,680 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] [2021-11-19 14:01:49,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-19 14:01:49,681 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:01:49,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:49,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1020904745, now seen corresponding path program 1 times [2021-11-19 14:01:49,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:01:49,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781595255] [2021-11-19 14:01:49,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:49,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:01:49,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:50,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:01:50,022 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:01:50,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781595255] [2021-11-19 14:01:50,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781595255] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:01:50,026 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:01:50,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 14:01:50,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342842166] [2021-11-19 14:01:50,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:01:50,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:01:50,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:01:50,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:01:50,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:01:50,031 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) [2021-11-19 14:01:50,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:01:50,288 INFO L93 Difference]: Finished difference Result 1766 states and 2359 transitions. [2021-11-19 14:01:50,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:01:50,290 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 [2021-11-19 14:01:50,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:01:50,299 INFO L225 Difference]: With dead ends: 1766 [2021-11-19 14:01:50,300 INFO L226 Difference]: Without dead ends: 1083 [2021-11-19 14:01:50,303 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 [2021-11-19 14:01:50,313 INFO L933 BasicCegarLoop]: 445 mSDtfsCounter, 749 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 749 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 [2021-11-19 14:01:50,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [749 Valid, 692 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:01:50,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2021-11-19 14:01:50,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 1081. [2021-11-19 14:01:50,464 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) [2021-11-19 14:01:50,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1081 states to 1081 states and 1420 transitions. [2021-11-19 14:01:50,472 INFO L78 Accepts]: Start accepts. Automaton has 1081 states and 1420 transitions. Word has length 121 [2021-11-19 14:01:50,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:01:50,473 INFO L470 AbstractCegarLoop]: Abstraction has 1081 states and 1420 transitions. [2021-11-19 14:01:50,474 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) [2021-11-19 14:01:50,475 INFO L276 IsEmpty]: Start isEmpty. Operand 1081 states and 1420 transitions. [2021-11-19 14:01:50,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-19 14:01:50,480 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:01:50,480 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] [2021-11-19 14:01:50,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-19 14:01:50,481 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:01:50,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:50,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1032350864, now seen corresponding path program 1 times [2021-11-19 14:01:50,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:01:50,483 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454578263] [2021-11-19 14:01:50,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:50,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:01:50,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:50,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:01:50,601 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:01:50,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454578263] [2021-11-19 14:01:50,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454578263] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:01:50,602 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:01:50,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 14:01:50,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077539243] [2021-11-19 14:01:50,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:01:50,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:01:50,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:01:50,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:01:50,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:01:50,605 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) [2021-11-19 14:01:50,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:01:50,918 INFO L93 Difference]: Finished difference Result 2054 states and 2701 transitions. [2021-11-19 14:01:50,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:01:50,919 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 [2021-11-19 14:01:50,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:01:50,926 INFO L225 Difference]: With dead ends: 2054 [2021-11-19 14:01:50,927 INFO L226 Difference]: Without dead ends: 1081 [2021-11-19 14:01:50,928 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 [2021-11-19 14:01:50,930 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, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:01:50,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [786 Valid, 226 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:01:50,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1081 states. [2021-11-19 14:01:51,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1081 to 1081. [2021-11-19 14:01:51,040 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) [2021-11-19 14:01:51,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1081 states to 1081 states and 1396 transitions. [2021-11-19 14:01:51,045 INFO L78 Accepts]: Start accepts. Automaton has 1081 states and 1396 transitions. Word has length 121 [2021-11-19 14:01:51,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:01:51,046 INFO L470 AbstractCegarLoop]: Abstraction has 1081 states and 1396 transitions. [2021-11-19 14:01:51,047 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) [2021-11-19 14:01:51,047 INFO L276 IsEmpty]: Start isEmpty. Operand 1081 states and 1396 transitions. [2021-11-19 14:01:51,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-19 14:01:51,050 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:01:51,051 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] [2021-11-19 14:01:51,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-19 14:01:51,051 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:01:51,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:51,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1421290091, now seen corresponding path program 1 times [2021-11-19 14:01:51,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:01:51,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370290261] [2021-11-19 14:01:51,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:51,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:01:51,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:51,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:01:51,437 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:01:51,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370290261] [2021-11-19 14:01:51,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370290261] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:01:51,438 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:01:51,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 14:01:51,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632221830] [2021-11-19 14:01:51,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:01:51,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:01:51,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:01:51,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:01:51,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:01:51,442 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) [2021-11-19 14:01:51,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:01:51,857 INFO L93 Difference]: Finished difference Result 3043 states and 3940 transitions. [2021-11-19 14:01:51,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:01:51,858 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 [2021-11-19 14:01:51,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:01:51,873 INFO L225 Difference]: With dead ends: 3043 [2021-11-19 14:01:51,874 INFO L226 Difference]: Without dead ends: 2044 [2021-11-19 14:01:51,876 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 [2021-11-19 14:01:51,877 INFO L933 BasicCegarLoop]: 263 mSDtfsCounter, 1206 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1206 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 [2021-11-19 14:01:51,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1206 Valid, 507 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:01:51,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2044 states. [2021-11-19 14:01:52,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2044 to 2042. [2021-11-19 14:01:52,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2042 states, 2041 states have (on average 1.2876041156295934) internal successors, (2628), 2041 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:01:52,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2042 states to 2042 states and 2628 transitions. [2021-11-19 14:01:52,165 INFO L78 Accepts]: Start accepts. Automaton has 2042 states and 2628 transitions. Word has length 121 [2021-11-19 14:01:52,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:01:52,167 INFO L470 AbstractCegarLoop]: Abstraction has 2042 states and 2628 transitions. [2021-11-19 14:01:52,168 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) [2021-11-19 14:01:52,168 INFO L276 IsEmpty]: Start isEmpty. Operand 2042 states and 2628 transitions. [2021-11-19 14:01:52,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-19 14:01:52,173 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:01:52,180 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] [2021-11-19 14:01:52,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-19 14:01:52,181 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:01:52,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:52,182 INFO L85 PathProgramCache]: Analyzing trace with hash -31024589, now seen corresponding path program 1 times [2021-11-19 14:01:52,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:01:52,183 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278268097] [2021-11-19 14:01:52,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:52,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:01:52,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:52,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:01:52,611 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:01:52,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278268097] [2021-11-19 14:01:52,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278268097] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:01:52,612 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:01:52,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 14:01:52,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45634745] [2021-11-19 14:01:52,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:01:52,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:01:52,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:01:52,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:01:52,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:01:52,615 INFO L87 Difference]: Start difference. First operand 2042 states and 2628 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) [2021-11-19 14:01:52,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:01:52,962 INFO L93 Difference]: Finished difference Result 2046 states and 2630 transitions. [2021-11-19 14:01:52,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:01:52,963 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 [2021-11-19 14:01:52,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:01:52,979 INFO L225 Difference]: With dead ends: 2046 [2021-11-19 14:01:52,979 INFO L226 Difference]: Without dead ends: 1772 [2021-11-19 14:01:52,981 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 [2021-11-19 14:01:52,984 INFO L933 BasicCegarLoop]: 275 mSDtfsCounter, 965 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 965 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:01:52,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [965 Valid, 531 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:01:52,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1772 states. [2021-11-19 14:01:53,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1772 to 1632. [2021-11-19 14:01:53,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1632 states, 1631 states have (on average 1.2752912323727774) internal successors, (2080), 1631 states have internal predecessors, (2080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:01:53,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1632 states to 1632 states and 2080 transitions. [2021-11-19 14:01:53,209 INFO L78 Accepts]: Start accepts. Automaton has 1632 states and 2080 transitions. Word has length 127 [2021-11-19 14:01:53,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:01:53,210 INFO L470 AbstractCegarLoop]: Abstraction has 1632 states and 2080 transitions. [2021-11-19 14:01:53,210 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) [2021-11-19 14:01:53,210 INFO L276 IsEmpty]: Start isEmpty. Operand 1632 states and 2080 transitions. [2021-11-19 14:01:53,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-19 14:01:53,215 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:01:53,215 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] [2021-11-19 14:01:53,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-19 14:01:53,215 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:01:53,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:53,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1397033387, now seen corresponding path program 1 times [2021-11-19 14:01:53,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:01:53,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816662366] [2021-11-19 14:01:53,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:53,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:01:53,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:53,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:01:53,627 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:01:53,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816662366] [2021-11-19 14:01:53,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816662366] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:01:53,628 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:01:53,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 14:01:53,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423299347] [2021-11-19 14:01:53,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:01:53,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:01:53,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:01:53,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:01:53,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:01:53,631 INFO L87 Difference]: Start difference. First operand 1632 states and 2080 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) [2021-11-19 14:01:53,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:01:53,946 INFO L93 Difference]: Finished difference Result 2732 states and 3493 transitions. [2021-11-19 14:01:53,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:01:53,947 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 [2021-11-19 14:01:53,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:01:53,959 INFO L225 Difference]: With dead ends: 2732 [2021-11-19 14:01:53,959 INFO L226 Difference]: Without dead ends: 2082 [2021-11-19 14:01:53,964 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 [2021-11-19 14:01:53,967 INFO L933 BasicCegarLoop]: 278 mSDtfsCounter, 495 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:01:53,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [495 Valid, 526 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:01:53,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2082 states. [2021-11-19 14:01:54,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2082 to 2080. [2021-11-19 14:01:54,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2080 states, 2079 states have (on average 1.2645502645502646) internal successors, (2629), 2079 states have internal predecessors, (2629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:01:54,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2080 states to 2080 states and 2629 transitions. [2021-11-19 14:01:54,225 INFO L78 Accepts]: Start accepts. Automaton has 2080 states and 2629 transitions. Word has length 133 [2021-11-19 14:01:54,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:01:54,226 INFO L470 AbstractCegarLoop]: Abstraction has 2080 states and 2629 transitions. [2021-11-19 14:01:54,226 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) [2021-11-19 14:01:54,226 INFO L276 IsEmpty]: Start isEmpty. Operand 2080 states and 2629 transitions. [2021-11-19 14:01:54,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-19 14:01:54,231 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:01:54,231 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] [2021-11-19 14:01:54,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-19 14:01:54,232 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:01:54,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:54,233 INFO L85 PathProgramCache]: Analyzing trace with hash -2112036481, now seen corresponding path program 1 times [2021-11-19 14:01:54,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:01:54,234 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424509847] [2021-11-19 14:01:54,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:54,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:01:54,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:02:21,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:02:21,597 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:02:21,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424509847] [2021-11-19 14:02:21,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424509847] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:02:21,598 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:02:21,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2021-11-19 14:02:21,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157576135] [2021-11-19 14:02:21,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:02:21,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-19 14:02:21,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:02:21,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-19 14:02:21,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=1593, Unknown=0, NotChecked=0, Total=1892 [2021-11-19 14:02:21,602 INFO L87 Difference]: Start difference. First operand 2080 states and 2629 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) [2021-11-19 14:02:52,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:02:52,229 INFO L93 Difference]: Finished difference Result 3859 states and 5090 transitions. [2021-11-19 14:02:52,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-19 14:02:52,230 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 [2021-11-19 14:02:52,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:02:52,246 INFO L225 Difference]: With dead ends: 3859 [2021-11-19 14:02:52,246 INFO L226 Difference]: Without dead ends: 3094 [2021-11-19 14:02:52,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1531 ImplicationChecksByTransitivity, 29.8s TimeCoverageRelationStatistics Valid=1363, Invalid=5609, Unknown=0, NotChecked=0, Total=6972 [2021-11-19 14:02:52,252 INFO L933 BasicCegarLoop]: 276 mSDtfsCounter, 3851 mSDsluCounter, 4198 mSDsCounter, 0 mSdLazyCounter, 3645 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3851 SdHoareTripleChecker+Valid, 4406 SdHoareTripleChecker+Invalid, 3787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 3645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:02:52,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3851 Valid, 4406 Invalid, 3787 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [142 Valid, 3645 Invalid, 0 Unknown, 0 Unchecked, 7.8s Time] [2021-11-19 14:02:52,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3094 states. [2021-11-19 14:02:52,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3094 to 2820. [2021-11-19 14:02:52,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2820 states, 2819 states have (on average 1.2912380276693862) internal successors, (3640), 2819 states have internal predecessors, (3640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:02:52,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2820 states to 2820 states and 3640 transitions. [2021-11-19 14:02:52,599 INFO L78 Accepts]: Start accepts. Automaton has 2820 states and 3640 transitions. Word has length 133 [2021-11-19 14:02:52,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:02:52,600 INFO L470 AbstractCegarLoop]: Abstraction has 2820 states and 3640 transitions. [2021-11-19 14:02:52,600 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) [2021-11-19 14:02:52,601 INFO L276 IsEmpty]: Start isEmpty. Operand 2820 states and 3640 transitions. [2021-11-19 14:02:52,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-19 14:02:52,605 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:02:52,606 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] [2021-11-19 14:02:52,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-19 14:02:52,606 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:02:52,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:02:52,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1623510684, now seen corresponding path program 1 times [2021-11-19 14:02:52,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:02:52,607 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151952050] [2021-11-19 14:02:52,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:02:52,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:02:52,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:02:52,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:02:52,792 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:02:52,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151952050] [2021-11-19 14:02:52,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151952050] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:02:52,792 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:02:52,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 14:02:52,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176503637] [2021-11-19 14:02:52,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:02:52,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:02:52,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:02:52,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:02:52,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:02:52,795 INFO L87 Difference]: Start difference. First operand 2820 states and 3640 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) [2021-11-19 14:02:53,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:02:53,855 INFO L93 Difference]: Finished difference Result 6904 states and 8935 transitions. [2021-11-19 14:02:53,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:02:53,856 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 [2021-11-19 14:02:53,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:02:53,879 INFO L225 Difference]: With dead ends: 6904 [2021-11-19 14:02:53,880 INFO L226 Difference]: Without dead ends: 4225 [2021-11-19 14:02:53,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:02:53,887 INFO L933 BasicCegarLoop]: 301 mSDtfsCounter, 1479 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1479 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:02:53,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1479 Valid, 663 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 14:02:53,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4225 states. [2021-11-19 14:02:54,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4225 to 4206. [2021-11-19 14:02:54,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4206 states, 4205 states have (on average 1.2546967895362664) internal successors, (5276), 4205 states have internal predecessors, (5276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:02:54,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4206 states to 4206 states and 5276 transitions. [2021-11-19 14:02:54,556 INFO L78 Accepts]: Start accepts. Automaton has 4206 states and 5276 transitions. Word has length 133 [2021-11-19 14:02:54,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:02:54,556 INFO L470 AbstractCegarLoop]: Abstraction has 4206 states and 5276 transitions. [2021-11-19 14:02:54,557 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) [2021-11-19 14:02:54,557 INFO L276 IsEmpty]: Start isEmpty. Operand 4206 states and 5276 transitions. [2021-11-19 14:02:54,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-19 14:02:54,563 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:02:54,563 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] [2021-11-19 14:02:54,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-19 14:02:54,564 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:02:54,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:02:54,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1915666155, now seen corresponding path program 1 times [2021-11-19 14:02:54,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:02:54,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615608785] [2021-11-19 14:02:54,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:02:54,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:02:54,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:02:54,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:02:54,766 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:02:54,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615608785] [2021-11-19 14:02:54,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615608785] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:02:54,766 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:02:54,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 14:02:54,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304907490] [2021-11-19 14:02:54,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:02:54,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:02:54,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:02:54,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:02:54,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:02:54,769 INFO L87 Difference]: Start difference. First operand 4206 states and 5276 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) [2021-11-19 14:02:55,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:02:55,427 INFO L93 Difference]: Finished difference Result 5442 states and 6907 transitions. [2021-11-19 14:02:55,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:02:55,428 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 [2021-11-19 14:02:55,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:02:55,448 INFO L225 Difference]: With dead ends: 5442 [2021-11-19 14:02:55,448 INFO L226 Difference]: Without dead ends: 3665 [2021-11-19 14:02:55,452 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 [2021-11-19 14:02:55,453 INFO L933 BasicCegarLoop]: 363 mSDtfsCounter, 907 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 907 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:02:55,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [907 Valid, 599 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:02:55,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3665 states. [2021-11-19 14:02:56,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3665 to 3663. [2021-11-19 14:02:56,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3663 states, 3662 states have (on average 1.2515019115237576) internal successors, (4583), 3662 states have internal predecessors, (4583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:02:56,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3663 states to 3663 states and 4583 transitions. [2021-11-19 14:02:56,029 INFO L78 Accepts]: Start accepts. Automaton has 3663 states and 4583 transitions. Word has length 133 [2021-11-19 14:02:56,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:02:56,029 INFO L470 AbstractCegarLoop]: Abstraction has 3663 states and 4583 transitions. [2021-11-19 14:02:56,030 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) [2021-11-19 14:02:56,030 INFO L276 IsEmpty]: Start isEmpty. Operand 3663 states and 4583 transitions. [2021-11-19 14:02:56,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-19 14:02:56,036 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:02:56,036 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] [2021-11-19 14:02:56,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-19 14:02:56,037 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:02:56,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:02:56,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1612766911, now seen corresponding path program 1 times [2021-11-19 14:02:56,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:02:56,039 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769238842] [2021-11-19 14:02:56,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:02:56,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:02:56,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:03:14,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:03:14,610 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:03:14,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769238842] [2021-11-19 14:03:14,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769238842] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:03:14,611 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:03:14,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2021-11-19 14:03:14,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78685042] [2021-11-19 14:03:14,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:03:14,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-19 14:03:14,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:03:14,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-19 14:03:14,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1638, Unknown=0, NotChecked=0, Total=1892 [2021-11-19 14:03:14,614 INFO L87 Difference]: Start difference. First operand 3663 states and 4583 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) [2021-11-19 14:03:39,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:03:39,661 INFO L93 Difference]: Finished difference Result 5420 states and 6825 transitions. [2021-11-19 14:03:39,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-19 14:03:39,662 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 [2021-11-19 14:03:39,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:03:39,687 INFO L225 Difference]: With dead ends: 5420 [2021-11-19 14:03:39,687 INFO L226 Difference]: Without dead ends: 4137 [2021-11-19 14:03:39,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1262 ImplicationChecksByTransitivity, 27.3s TimeCoverageRelationStatistics Valid=1120, Invalid=5200, Unknown=0, NotChecked=0, Total=6320 [2021-11-19 14:03:39,695 INFO L933 BasicCegarLoop]: 326 mSDtfsCounter, 2203 mSDsluCounter, 3265 mSDsCounter, 0 mSdLazyCounter, 2442 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2203 SdHoareTripleChecker+Valid, 3564 SdHoareTripleChecker+Invalid, 2497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 2442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:03:39,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2203 Valid, 3564 Invalid, 2497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 2442 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2021-11-19 14:03:39,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4137 states. [2021-11-19 14:03:40,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4137 to 3779. [2021-11-19 14:03:40,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3779 states, 3778 states have (on average 1.2464266807834834) internal successors, (4709), 3778 states have internal predecessors, (4709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:03:40,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3779 states to 3779 states and 4709 transitions. [2021-11-19 14:03:40,399 INFO L78 Accepts]: Start accepts. Automaton has 3779 states and 4709 transitions. Word has length 133 [2021-11-19 14:03:40,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:03:40,399 INFO L470 AbstractCegarLoop]: Abstraction has 3779 states and 4709 transitions. [2021-11-19 14:03:40,400 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) [2021-11-19 14:03:40,400 INFO L276 IsEmpty]: Start isEmpty. Operand 3779 states and 4709 transitions. [2021-11-19 14:03:40,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-19 14:03:40,406 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:03:40,406 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] [2021-11-19 14:03:40,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-19 14:03:40,407 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:03:40,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:03:40,408 INFO L85 PathProgramCache]: Analyzing trace with hash 705336723, now seen corresponding path program 1 times [2021-11-19 14:03:40,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:03:40,408 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813903321] [2021-11-19 14:03:40,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:03:40,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:03:40,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:03:40,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:03:40,458 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:03:40,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813903321] [2021-11-19 14:03:40,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813903321] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:03:40,458 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:03:40,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 14:03:40,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106401357] [2021-11-19 14:03:40,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:03:40,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:03:40,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:03:40,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:03:40,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:03:40,460 INFO L87 Difference]: Start difference. First operand 3779 states and 4709 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) [2021-11-19 14:03:41,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:03:41,268 INFO L93 Difference]: Finished difference Result 6627 states and 8302 transitions. [2021-11-19 14:03:41,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:03:41,269 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 [2021-11-19 14:03:41,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:03:41,300 INFO L225 Difference]: With dead ends: 6627 [2021-11-19 14:03:41,307 INFO L226 Difference]: Without dead ends: 4071 [2021-11-19 14:03:41,312 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 [2021-11-19 14:03:41,313 INFO L933 BasicCegarLoop]: 231 mSDtfsCounter, 221 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:03:41,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 305 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:03:41,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4071 states. [2021-11-19 14:03:41,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4071 to 3734. [2021-11-19 14:03:41,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3734 states, 3733 states have (on average 1.2368068577551568) internal successors, (4617), 3733 states have internal predecessors, (4617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:03:41,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3734 states to 3734 states and 4617 transitions. [2021-11-19 14:03:41,870 INFO L78 Accepts]: Start accepts. Automaton has 3734 states and 4617 transitions. Word has length 134 [2021-11-19 14:03:41,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:03:41,871 INFO L470 AbstractCegarLoop]: Abstraction has 3734 states and 4617 transitions. [2021-11-19 14:03:41,871 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) [2021-11-19 14:03:41,871 INFO L276 IsEmpty]: Start isEmpty. Operand 3734 states and 4617 transitions. [2021-11-19 14:03:41,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-19 14:03:41,877 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:03:41,878 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] [2021-11-19 14:03:41,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-19 14:03:41,878 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:03:41,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:03:41,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1863063984, now seen corresponding path program 1 times [2021-11-19 14:03:41,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:03:41,879 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290471917] [2021-11-19 14:03:41,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:03:41,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:03:41,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:03:41,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:03:41,958 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:03:41,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290471917] [2021-11-19 14:03:41,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290471917] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:03:41,958 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:03:41,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 14:03:41,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633934039] [2021-11-19 14:03:41,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:03:41,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:03:41,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:03:41,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:03:41,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:03:41,961 INFO L87 Difference]: Start difference. First operand 3734 states and 4617 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) [2021-11-19 14:03:42,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:03:42,880 INFO L93 Difference]: Finished difference Result 6173 states and 7637 transitions. [2021-11-19 14:03:42,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:03:42,881 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 [2021-11-19 14:03:42,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:03:42,890 INFO L225 Difference]: With dead ends: 6173 [2021-11-19 14:03:42,891 INFO L226 Difference]: Without dead ends: 3735 [2021-11-19 14:03:42,895 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 [2021-11-19 14:03:42,896 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 200 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:03:42,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 232 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:03:42,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3735 states. [2021-11-19 14:03:43,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3735 to 3681. [2021-11-19 14:03:43,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3681 states, 3680 states have (on average 1.2252717391304349) internal successors, (4509), 3680 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) [2021-11-19 14:03:43,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3681 states to 3681 states and 4509 transitions. [2021-11-19 14:03:43,503 INFO L78 Accepts]: Start accepts. Automaton has 3681 states and 4509 transitions. Word has length 134 [2021-11-19 14:03:43,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:03:43,504 INFO L470 AbstractCegarLoop]: Abstraction has 3681 states and 4509 transitions. [2021-11-19 14:03:43,505 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) [2021-11-19 14:03:43,505 INFO L276 IsEmpty]: Start isEmpty. Operand 3681 states and 4509 transitions. [2021-11-19 14:03:43,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-19 14:03:43,511 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:03:43,511 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] [2021-11-19 14:03:43,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-19 14:03:43,512 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:03:43,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:03:43,513 INFO L85 PathProgramCache]: Analyzing trace with hash -2026271304, now seen corresponding path program 1 times [2021-11-19 14:03:43,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:03:43,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569714301] [2021-11-19 14:03:43,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:03:43,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:03:43,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:03:43,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:03:43,634 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:03:43,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569714301] [2021-11-19 14:03:43,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569714301] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:03:43,635 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:03:43,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 14:03:43,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483258579] [2021-11-19 14:03:43,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:03:43,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:03:43,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:03:43,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:03:43,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:03:43,637 INFO L87 Difference]: Start difference. First operand 3681 states and 4509 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) [2021-11-19 14:03:44,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:03:44,521 INFO L93 Difference]: Finished difference Result 6666 states and 8228 transitions. [2021-11-19 14:03:44,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:03:44,521 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 [2021-11-19 14:03:44,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:03:44,532 INFO L225 Difference]: With dead ends: 6666 [2021-11-19 14:03:44,532 INFO L226 Difference]: Without dead ends: 4159 [2021-11-19 14:03:44,539 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 [2021-11-19 14:03:44,540 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 [2021-11-19 14:03:44,541 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] [2021-11-19 14:03:44,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4159 states. [2021-11-19 14:03:45,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4159 to 3573. [2021-11-19 14:03:45,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3573 states, 3572 states have (on average 1.2186450167973124) internal successors, (4353), 3572 states have internal predecessors, (4353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:03:45,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3573 states to 3573 states and 4353 transitions. [2021-11-19 14:03:45,263 INFO L78 Accepts]: Start accepts. Automaton has 3573 states and 4353 transitions. Word has length 134 [2021-11-19 14:03:45,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:03:45,264 INFO L470 AbstractCegarLoop]: Abstraction has 3573 states and 4353 transitions. [2021-11-19 14:03:45,264 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) [2021-11-19 14:03:45,264 INFO L276 IsEmpty]: Start isEmpty. Operand 3573 states and 4353 transitions. [2021-11-19 14:03:45,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-19 14:03:45,271 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:03:45,271 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] [2021-11-19 14:03:45,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-19 14:03:45,271 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:03:45,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:03:45,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1883195160, now seen corresponding path program 1 times [2021-11-19 14:03:45,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:03:45,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318189062] [2021-11-19 14:03:45,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:03:45,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:03:45,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:03:45,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:03:45,317 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:03:45,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318189062] [2021-11-19 14:03:45,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318189062] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:03:45,318 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:03:45,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 14:03:45,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878738306] [2021-11-19 14:03:45,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:03:45,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:03:45,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:03:45,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:03:45,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:03:45,320 INFO L87 Difference]: Start difference. First operand 3573 states and 4353 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) [2021-11-19 14:03:46,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:03:46,094 INFO L93 Difference]: Finished difference Result 7189 states and 8875 transitions. [2021-11-19 14:03:46,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:03:46,094 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 [2021-11-19 14:03:46,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:03:46,103 INFO L225 Difference]: With dead ends: 7189 [2021-11-19 14:03:46,104 INFO L226 Difference]: Without dead ends: 4088 [2021-11-19 14:03:46,107 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 [2021-11-19 14:03:46,108 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 [2021-11-19 14:03:46,109 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] [2021-11-19 14:03:46,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4088 states. [2021-11-19 14:03:46,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4088 to 3514. [2021-11-19 14:03:46,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3514 states, 3513 states have (on average 1.2095075434101907) internal successors, (4249), 3513 states have internal predecessors, (4249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:03:46,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3514 states to 3514 states and 4249 transitions. [2021-11-19 14:03:46,739 INFO L78 Accepts]: Start accepts. Automaton has 3514 states and 4249 transitions. Word has length 134 [2021-11-19 14:03:46,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:03:46,740 INFO L470 AbstractCegarLoop]: Abstraction has 3514 states and 4249 transitions. [2021-11-19 14:03:46,740 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) [2021-11-19 14:03:46,740 INFO L276 IsEmpty]: Start isEmpty. Operand 3514 states and 4249 transitions. [2021-11-19 14:03:46,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-19 14:03:46,746 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:03:46,747 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] [2021-11-19 14:03:46,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-19 14:03:46,747 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:03:46,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:03:46,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1109404638, now seen corresponding path program 1 times [2021-11-19 14:03:46,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:03:46,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736190868] [2021-11-19 14:03:46,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:03:46,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:03:46,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:03:46,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:03:46,822 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:03:46,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736190868] [2021-11-19 14:03:46,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736190868] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:03:46,825 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:03:46,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 14:03:46,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009454436] [2021-11-19 14:03:46,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:03:46,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:03:46,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:03:46,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:03:46,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:03:46,827 INFO L87 Difference]: Start difference. First operand 3514 states and 4249 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) [2021-11-19 14:03:47,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:03:47,499 INFO L93 Difference]: Finished difference Result 5851 states and 7104 transitions. [2021-11-19 14:03:47,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:03:47,501 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 [2021-11-19 14:03:47,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:03:47,513 INFO L225 Difference]: With dead ends: 5851 [2021-11-19 14:03:47,513 INFO L226 Difference]: Without dead ends: 3518 [2021-11-19 14:03:47,518 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 [2021-11-19 14:03:47,520 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 [2021-11-19 14:03:47,526 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] [2021-11-19 14:03:47,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3518 states. [2021-11-19 14:03:48,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3518 to 3466. [2021-11-19 14:03:48,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3466 states, 3465 states have (on average 1.197979797979798) internal successors, (4151), 3465 states have internal predecessors, (4151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:03:48,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3466 states to 3466 states and 4151 transitions. [2021-11-19 14:03:48,240 INFO L78 Accepts]: Start accepts. Automaton has 3466 states and 4151 transitions. Word has length 134 [2021-11-19 14:03:48,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:03:48,241 INFO L470 AbstractCegarLoop]: Abstraction has 3466 states and 4151 transitions. [2021-11-19 14:03:48,241 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) [2021-11-19 14:03:48,242 INFO L276 IsEmpty]: Start isEmpty. Operand 3466 states and 4151 transitions. [2021-11-19 14:03:48,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-19 14:03:48,248 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:03:48,248 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] [2021-11-19 14:03:48,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-19 14:03:48,249 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:03:48,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:03:48,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1539985247, now seen corresponding path program 1 times [2021-11-19 14:03:48,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:03:48,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292356595] [2021-11-19 14:03:48,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:03:48,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:03:48,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:03:48,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:03:48,318 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:03:48,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292356595] [2021-11-19 14:03:48,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292356595] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:03:48,318 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:03:48,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 14:03:48,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088567949] [2021-11-19 14:03:48,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:03:48,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:03:48,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:03:48,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:03:48,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:03:48,321 INFO L87 Difference]: Start difference. First operand 3466 states and 4151 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) [2021-11-19 14:03:49,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:03:49,073 INFO L93 Difference]: Finished difference Result 5960 states and 7179 transitions. [2021-11-19 14:03:49,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:03:49,074 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 [2021-11-19 14:03:49,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:03:49,084 INFO L225 Difference]: With dead ends: 5960 [2021-11-19 14:03:49,085 INFO L226 Difference]: Without dead ends: 3620 [2021-11-19 14:03:49,089 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 [2021-11-19 14:03:49,090 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 [2021-11-19 14:03:49,091 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] [2021-11-19 14:03:49,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3620 states. [2021-11-19 14:03:49,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3620 to 3324. [2021-11-19 14:03:49,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3324 states, 3323 states have (on average 1.1907914535058681) internal successors, (3957), 3323 states have internal predecessors, (3957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:03:49,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3324 states to 3324 states and 3957 transitions. [2021-11-19 14:03:49,621 INFO L78 Accepts]: Start accepts. Automaton has 3324 states and 3957 transitions. Word has length 134 [2021-11-19 14:03:49,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:03:49,622 INFO L470 AbstractCegarLoop]: Abstraction has 3324 states and 3957 transitions. [2021-11-19 14:03:49,622 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) [2021-11-19 14:03:49,622 INFO L276 IsEmpty]: Start isEmpty. Operand 3324 states and 3957 transitions. [2021-11-19 14:03:49,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-19 14:03:49,627 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:03:49,628 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] [2021-11-19 14:03:49,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-19 14:03:49,628 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:03:49,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:03:49,629 INFO L85 PathProgramCache]: Analyzing trace with hash -206003554, now seen corresponding path program 1 times [2021-11-19 14:03:49,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:03:49,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809642716] [2021-11-19 14:03:49,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:03:49,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:03:49,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:03:49,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:03:49,703 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:03:49,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809642716] [2021-11-19 14:03:49,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809642716] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:03:49,703 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:03:49,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 14:03:49,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363291491] [2021-11-19 14:03:49,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:03:49,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:03:49,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:03:49,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:03:49,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:03:49,706 INFO L87 Difference]: Start difference. First operand 3324 states and 3957 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) [2021-11-19 14:03:50,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:03:50,356 INFO L93 Difference]: Finished difference Result 3913 states and 4687 transitions. [2021-11-19 14:03:50,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:03:50,357 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 [2021-11-19 14:03:50,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:03:50,366 INFO L225 Difference]: With dead ends: 3913 [2021-11-19 14:03:50,366 INFO L226 Difference]: Without dead ends: 3261 [2021-11-19 14:03:50,369 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 [2021-11-19 14:03:50,369 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 [2021-11-19 14:03:50,370 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] [2021-11-19 14:03:50,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3261 states. [2021-11-19 14:03:50,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3261 to 3259. [2021-11-19 14:03:50,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3259 states, 3258 states have (on average 1.1810926949048497) internal successors, (3848), 3258 states have internal predecessors, (3848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:03:50,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3259 states to 3259 states and 3848 transitions. [2021-11-19 14:03:50,840 INFO L78 Accepts]: Start accepts. Automaton has 3259 states and 3848 transitions. Word has length 136 [2021-11-19 14:03:50,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:03:50,840 INFO L470 AbstractCegarLoop]: Abstraction has 3259 states and 3848 transitions. [2021-11-19 14:03:50,841 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) [2021-11-19 14:03:50,841 INFO L276 IsEmpty]: Start isEmpty. Operand 3259 states and 3848 transitions. [2021-11-19 14:03:50,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-19 14:03:50,845 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:03:50,846 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] [2021-11-19 14:03:50,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-19 14:03:50,846 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:03:50,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:03:50,847 INFO L85 PathProgramCache]: Analyzing trace with hash -287854409, now seen corresponding path program 1 times [2021-11-19 14:03:50,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:03:50,847 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054665396] [2021-11-19 14:03:50,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:03:50,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:03:51,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:04:31,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:04:31,784 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:04:31,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054665396] [2021-11-19 14:04:31,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054665396] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:04:31,784 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:04:31,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2021-11-19 14:04:31,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480175933] [2021-11-19 14:04:31,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:04:31,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-19 14:04:31,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:04:31,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-19 14:04:31,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=366, Invalid=1890, Unknown=0, NotChecked=0, Total=2256 [2021-11-19 14:04:31,787 INFO L87 Difference]: Start difference. First operand 3259 states and 3848 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) [2021-11-19 14:04:59,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:04:59,185 INFO L93 Difference]: Finished difference Result 3339 states and 3950 transitions. [2021-11-19 14:04:59,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-19 14:04:59,186 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 [2021-11-19 14:04:59,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:04:59,189 INFO L225 Difference]: With dead ends: 3339 [2021-11-19 14:04:59,189 INFO L226 Difference]: Without dead ends: 3262 [2021-11-19 14:04:59,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1460 ImplicationChecksByTransitivity, 26.1s TimeCoverageRelationStatistics Valid=1455, Invalid=5855, Unknown=0, NotChecked=0, Total=7310 [2021-11-19 14:04:59,192 INFO L933 BasicCegarLoop]: 284 mSDtfsCounter, 1610 mSDsluCounter, 4867 mSDsCounter, 0 mSdLazyCounter, 5246 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1610 SdHoareTripleChecker+Valid, 5089 SdHoareTripleChecker+Invalid, 5293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 5246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:04:59,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1610 Valid, 5089 Invalid, 5293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 5246 Invalid, 0 Unknown, 0 Unchecked, 9.2s Time] [2021-11-19 14:04:59,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3262 states. [2021-11-19 14:04:59,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3262 to 3258. [2021-11-19 14:04:59,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3258 states, 3257 states have (on average 1.1808412649677618) internal successors, (3846), 3257 states have internal predecessors, (3846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:04:59,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3258 states to 3258 states and 3846 transitions. [2021-11-19 14:04:59,577 INFO L78 Accepts]: Start accepts. Automaton has 3258 states and 3846 transitions. Word has length 139 [2021-11-19 14:04:59,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:04:59,578 INFO L470 AbstractCegarLoop]: Abstraction has 3258 states and 3846 transitions. [2021-11-19 14:04:59,578 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) [2021-11-19 14:04:59,578 INFO L276 IsEmpty]: Start isEmpty. Operand 3258 states and 3846 transitions. [2021-11-19 14:04:59,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-19 14:04:59,584 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:04:59,584 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] [2021-11-19 14:04:59,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-19 14:04:59,584 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:04:59,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:04:59,585 INFO L85 PathProgramCache]: Analyzing trace with hash 304966563, now seen corresponding path program 1 times [2021-11-19 14:04:59,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:04:59,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697013758] [2021-11-19 14:04:59,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:04:59,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:04:59,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:05:21,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:05:21,948 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:05:21,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697013758] [2021-11-19 14:05:21,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697013758] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:05:21,948 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:05:21,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2021-11-19 14:05:21,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936728917] [2021-11-19 14:05:21,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:05:21,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-19 14:05:21,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:05:21,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-19 14:05:21,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=1988, Unknown=0, NotChecked=0, Total=2256 [2021-11-19 14:05:21,950 INFO L87 Difference]: Start difference. First operand 3258 states and 3846 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) [2021-11-19 14:05:50,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:05:50,875 INFO L93 Difference]: Finished difference Result 3507 states and 4175 transitions. [2021-11-19 14:05:50,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-19 14:05:50,889 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 [2021-11-19 14:05:50,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:05:50,895 INFO L225 Difference]: With dead ends: 3507 [2021-11-19 14:05:50,895 INFO L226 Difference]: Without dead ends: 3350 [2021-11-19 14:05:50,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1664 ImplicationChecksByTransitivity, 26.9s TimeCoverageRelationStatistics Valid=1315, Invalid=6341, Unknown=0, NotChecked=0, Total=7656 [2021-11-19 14:05:50,900 INFO L933 BasicCegarLoop]: 297 mSDtfsCounter, 2020 mSDsluCounter, 5272 mSDsCounter, 0 mSdLazyCounter, 5308 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2020 SdHoareTripleChecker+Valid, 5448 SdHoareTripleChecker+Invalid, 5369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 5308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:05:50,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2020 Valid, 5448 Invalid, 5369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 5308 Invalid, 0 Unknown, 0 Unchecked, 8.5s Time] [2021-11-19 14:05:50,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3350 states. [2021-11-19 14:05:51,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3350 to 3257. [2021-11-19 14:05:51,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3257 states, 3256 states have (on average 1.1805896805896805) internal successors, (3844), 3256 states have internal predecessors, (3844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:05:51,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3257 states to 3257 states and 3844 transitions. [2021-11-19 14:05:51,342 INFO L78 Accepts]: Start accepts. Automaton has 3257 states and 3844 transitions. Word has length 139 [2021-11-19 14:05:51,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:05:51,342 INFO L470 AbstractCegarLoop]: Abstraction has 3257 states and 3844 transitions. [2021-11-19 14:05:51,343 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) [2021-11-19 14:05:51,343 INFO L276 IsEmpty]: Start isEmpty. Operand 3257 states and 3844 transitions. [2021-11-19 14:05:51,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-19 14:05:51,348 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:05:51,348 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] [2021-11-19 14:05:51,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-19 14:05:51,348 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:05:51,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:05:51,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1644772842, now seen corresponding path program 1 times [2021-11-19 14:05:51,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:05:51,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157031001] [2021-11-19 14:05:51,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:05:51,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:05:51,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:06:02,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:06:02,923 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:06:02,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157031001] [2021-11-19 14:06:02,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157031001] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:06:02,924 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:06:02,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2021-11-19 14:06:02,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482635543] [2021-11-19 14:06:02,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:06:02,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-19 14:06:02,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:06:02,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-19 14:06:02,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1640, Unknown=0, NotChecked=0, Total=1806 [2021-11-19 14:06:02,927 INFO L87 Difference]: Start difference. First operand 3257 states and 3844 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) [2021-11-19 14:06:19,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:06:19,605 INFO L93 Difference]: Finished difference Result 5838 states and 7322 transitions. [2021-11-19 14:06:19,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-19 14:06:19,606 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 [2021-11-19 14:06:19,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:06:19,610 INFO L225 Difference]: With dead ends: 5838 [2021-11-19 14:06:19,610 INFO L226 Difference]: Without dead ends: 4428 [2021-11-19 14:06:19,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1674 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=1110, Invalid=6372, Unknown=0, NotChecked=0, Total=7482 [2021-11-19 14:06:19,615 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 2090 mSDsluCounter, 3975 mSDsCounter, 0 mSdLazyCounter, 4448 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2090 SdHoareTripleChecker+Valid, 4104 SdHoareTripleChecker+Invalid, 4596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 4448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:06:19,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2090 Valid, 4104 Invalid, 4596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 4448 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2021-11-19 14:06:19,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4428 states. [2021-11-19 14:06:20,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4428 to 4420. [2021-11-19 14:06:20,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4420 states, 4419 states have (on average 1.2176963113826658) internal successors, (5381), 4419 states have internal predecessors, (5381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:06:20,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4420 states to 4420 states and 5381 transitions. [2021-11-19 14:06:20,146 INFO L78 Accepts]: Start accepts. Automaton has 4420 states and 5381 transitions. Word has length 139 [2021-11-19 14:06:20,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:06:20,146 INFO L470 AbstractCegarLoop]: Abstraction has 4420 states and 5381 transitions. [2021-11-19 14:06:20,146 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) [2021-11-19 14:06:20,147 INFO L276 IsEmpty]: Start isEmpty. Operand 4420 states and 5381 transitions. [2021-11-19 14:06:20,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-19 14:06:20,151 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:06:20,151 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] [2021-11-19 14:06:20,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-19 14:06:20,151 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:06:20,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:06:20,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1560579393, now seen corresponding path program 1 times [2021-11-19 14:06:20,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:06:20,152 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78831497] [2021-11-19 14:06:20,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:06:20,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:06:20,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:06:36,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:06:36,722 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:06:36,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78831497] [2021-11-19 14:06:36,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78831497] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:06:36,723 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:06:36,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2021-11-19 14:06:36,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337404676] [2021-11-19 14:06:36,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:06:36,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-19 14:06:36,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:06:36,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-19 14:06:36,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=1910, Unknown=0, NotChecked=0, Total=2256 [2021-11-19 14:06:36,726 INFO L87 Difference]: Start difference. First operand 4420 states and 5381 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) [2021-11-19 14:07:02,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:07:02,410 INFO L93 Difference]: Finished difference Result 4940 states and 6054 transitions. [2021-11-19 14:07:02,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-19 14:07:02,412 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 [2021-11-19 14:07:02,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:07:02,415 INFO L225 Difference]: With dead ends: 4940 [2021-11-19 14:07:02,415 INFO L226 Difference]: Without dead ends: 4599 [2021-11-19 14:07:02,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1559 ImplicationChecksByTransitivity, 23.6s TimeCoverageRelationStatistics Valid=1459, Invalid=6197, Unknown=0, NotChecked=0, Total=7656 [2021-11-19 14:07:02,419 INFO L933 BasicCegarLoop]: 357 mSDtfsCounter, 1765 mSDsluCounter, 4948 mSDsCounter, 0 mSdLazyCounter, 5234 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1765 SdHoareTripleChecker+Valid, 5220 SdHoareTripleChecker+Invalid, 5279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 5234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:07:02,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1765 Valid, 5220 Invalid, 5279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 5234 Invalid, 0 Unknown, 0 Unchecked, 7.5s Time] [2021-11-19 14:07:02,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4599 states. [2021-11-19 14:07:02,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4599 to 4419. [2021-11-19 14:07:02,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4419 states, 4418 states have (on average 1.2172928927116342) internal successors, (5378), 4418 states have internal predecessors, (5378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:07:02,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4419 states to 4419 states and 5378 transitions. [2021-11-19 14:07:02,946 INFO L78 Accepts]: Start accepts. Automaton has 4419 states and 5378 transitions. Word has length 139 [2021-11-19 14:07:02,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:07:02,946 INFO L470 AbstractCegarLoop]: Abstraction has 4419 states and 5378 transitions. [2021-11-19 14:07:02,946 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) [2021-11-19 14:07:02,946 INFO L276 IsEmpty]: Start isEmpty. Operand 4419 states and 5378 transitions. [2021-11-19 14:07:02,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-19 14:07:02,949 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:07:02,950 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] [2021-11-19 14:07:02,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-19 14:07:02,950 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:07:02,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:07:02,951 INFO L85 PathProgramCache]: Analyzing trace with hash 229657911, now seen corresponding path program 1 times [2021-11-19 14:07:02,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:07:02,951 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460164428] [2021-11-19 14:07:02,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:07:02,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:07:03,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:07:30,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:07:30,141 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:07:30,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460164428] [2021-11-19 14:07:30,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460164428] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:07:30,141 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:07:30,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2021-11-19 14:07:30,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143627605] [2021-11-19 14:07:30,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:07:30,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-19 14:07:30,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:07:30,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-19 14:07:30,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1898, Unknown=0, NotChecked=0, Total=2162 [2021-11-19 14:07:30,144 INFO L87 Difference]: Start difference. First operand 4419 states and 5378 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) [2021-11-19 14:08:08,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:08:08,765 INFO L93 Difference]: Finished difference Result 5621 states and 6905 transitions. [2021-11-19 14:08:08,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-19 14:08:08,766 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 [2021-11-19 14:08:08,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:08:08,771 INFO L225 Difference]: With dead ends: 5621 [2021-11-19 14:08:08,771 INFO L226 Difference]: Without dead ends: 4898 [2021-11-19 14:08:08,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1514 ImplicationChecksByTransitivity, 34.5s TimeCoverageRelationStatistics Valid=1296, Invalid=5844, Unknown=0, NotChecked=0, Total=7140 [2021-11-19 14:08:08,775 INFO L933 BasicCegarLoop]: 377 mSDtfsCounter, 1534 mSDsluCounter, 6148 mSDsCounter, 0 mSdLazyCounter, 6239 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1534 SdHoareTripleChecker+Valid, 6422 SdHoareTripleChecker+Invalid, 6272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 6239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:08:08,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1534 Valid, 6422 Invalid, 6272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 6239 Invalid, 0 Unknown, 0 Unchecked, 11.4s Time] [2021-11-19 14:08:08,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4898 states. [2021-11-19 14:08:09,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4898 to 4418. [2021-11-19 14:08:09,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4418 states, 4417 states have (on average 1.2166628933665384) internal successors, (5374), 4417 states have internal predecessors, (5374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:08:09,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4418 states to 4418 states and 5374 transitions. [2021-11-19 14:08:09,351 INFO L78 Accepts]: Start accepts. Automaton has 4418 states and 5374 transitions. Word has length 139 [2021-11-19 14:08:09,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:08:09,352 INFO L470 AbstractCegarLoop]: Abstraction has 4418 states and 5374 transitions. [2021-11-19 14:08:09,352 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) [2021-11-19 14:08:09,352 INFO L276 IsEmpty]: Start isEmpty. Operand 4418 states and 5374 transitions. [2021-11-19 14:08:09,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-19 14:08:09,356 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:08:09,356 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] [2021-11-19 14:08:09,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-19 14:08:09,357 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:08:09,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:08:09,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1171021157, now seen corresponding path program 1 times [2021-11-19 14:08:09,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:08:09,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370204227] [2021-11-19 14:08:09,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:08:09,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:08:09,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:08:24,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:08:24,156 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:08:24,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370204227] [2021-11-19 14:08:24,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370204227] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:08:24,156 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:08:24,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2021-11-19 14:08:24,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600002365] [2021-11-19 14:08:24,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:08:24,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-19 14:08:24,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:08:24,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-19 14:08:24,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=361, Invalid=1895, Unknown=0, NotChecked=0, Total=2256 [2021-11-19 14:08:24,159 INFO L87 Difference]: Start difference. First operand 4418 states and 5374 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) [2021-11-19 14:08:43,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:08:43,668 INFO L93 Difference]: Finished difference Result 4840 states and 5888 transitions. [2021-11-19 14:08:43,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-19 14:08:43,670 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 [2021-11-19 14:08:43,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:08:43,674 INFO L225 Difference]: With dead ends: 4840 [2021-11-19 14:08:43,674 INFO L226 Difference]: Without dead ends: 4498 [2021-11-19 14:08:43,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1643 ImplicationChecksByTransitivity, 19.3s TimeCoverageRelationStatistics Valid=1502, Invalid=6154, Unknown=0, NotChecked=0, Total=7656 [2021-11-19 14:08:43,676 INFO L933 BasicCegarLoop]: 307 mSDtfsCounter, 1704 mSDsluCounter, 3134 mSDsCounter, 0 mSdLazyCounter, 3358 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1704 SdHoareTripleChecker+Valid, 3404 SdHoareTripleChecker+Invalid, 3396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 3358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:08:43,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1704 Valid, 3404 Invalid, 3396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 3358 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2021-11-19 14:08:43,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4498 states. [2021-11-19 14:08:44,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4498 to 4417. [2021-11-19 14:08:44,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4417 states, 4416 states have (on average 1.2162590579710144) internal successors, (5371), 4416 states have internal predecessors, (5371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:08:44,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4417 states to 4417 states and 5371 transitions. [2021-11-19 14:08:44,244 INFO L78 Accepts]: Start accepts. Automaton has 4417 states and 5371 transitions. Word has length 139 [2021-11-19 14:08:44,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:08:44,245 INFO L470 AbstractCegarLoop]: Abstraction has 4417 states and 5371 transitions. [2021-11-19 14:08:44,245 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) [2021-11-19 14:08:44,245 INFO L276 IsEmpty]: Start isEmpty. Operand 4417 states and 5371 transitions. [2021-11-19 14:08:44,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-19 14:08:44,249 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:08:44,249 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] [2021-11-19 14:08:44,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-19 14:08:44,250 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:08:44,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:08:44,250 INFO L85 PathProgramCache]: Analyzing trace with hash 870992682, now seen corresponding path program 1 times [2021-11-19 14:08:44,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:08:44,251 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031166417] [2021-11-19 14:08:44,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:08:44,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:08:44,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:08:51,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:08:51,996 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:08:51,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031166417] [2021-11-19 14:08:51,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031166417] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:08:51,997 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:08:51,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2021-11-19 14:08:51,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831764241] [2021-11-19 14:08:51,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:08:51,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-19 14:08:51,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:08:51,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-19 14:08:51,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1631, Unknown=0, NotChecked=0, Total=1806 [2021-11-19 14:08:51,999 INFO L87 Difference]: Start difference. First operand 4417 states and 5371 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) [2021-11-19 14:09:08,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:09:08,781 INFO L93 Difference]: Finished difference Result 7862 states and 10024 transitions. [2021-11-19 14:09:08,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-19 14:09:08,781 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 [2021-11-19 14:09:08,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:09:08,789 INFO L225 Difference]: With dead ends: 7862 [2021-11-19 14:09:08,789 INFO L226 Difference]: Without dead ends: 6727 [2021-11-19 14:09:08,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2028 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=1204, Invalid=7352, Unknown=0, NotChecked=0, Total=8556 [2021-11-19 14:09:08,793 INFO L933 BasicCegarLoop]: 371 mSDtfsCounter, 1818 mSDsluCounter, 5836 mSDsCounter, 0 mSdLazyCounter, 6089 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1818 SdHoareTripleChecker+Valid, 6065 SdHoareTripleChecker+Invalid, 6227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 6089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:09:08,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1818 Valid, 6065 Invalid, 6227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 6089 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2021-11-19 14:09:08,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6727 states. [2021-11-19 14:09:09,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6727 to 5824. [2021-11-19 14:09:09,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5824 states, 5823 states have (on average 1.2493560020607934) internal successors, (7275), 5823 states have internal predecessors, (7275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:09:09,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5824 states to 5824 states and 7275 transitions. [2021-11-19 14:09:09,623 INFO L78 Accepts]: Start accepts. Automaton has 5824 states and 7275 transitions. Word has length 139 [2021-11-19 14:09:09,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:09:09,623 INFO L470 AbstractCegarLoop]: Abstraction has 5824 states and 7275 transitions. [2021-11-19 14:09:09,623 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) [2021-11-19 14:09:09,624 INFO L276 IsEmpty]: Start isEmpty. Operand 5824 states and 7275 transitions. [2021-11-19 14:09:09,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-19 14:09:09,629 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:09:09,629 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] [2021-11-19 14:09:09,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-19 14:09:09,629 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:09:09,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:09:09,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1851221155, now seen corresponding path program 1 times [2021-11-19 14:09:09,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:09:09,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228844263] [2021-11-19 14:09:09,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:09:09,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:09:09,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:09:28,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:09:28,080 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:09:28,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228844263] [2021-11-19 14:09:28,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228844263] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:09:28,080 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:09:28,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2021-11-19 14:09:28,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610094305] [2021-11-19 14:09:28,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:09:28,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-19 14:09:28,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:09:28,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-19 14:09:28,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1818, Unknown=0, NotChecked=0, Total=2070 [2021-11-19 14:09:28,082 INFO L87 Difference]: Start difference. First operand 5824 states and 7275 transitions. Second operand has 46 states, 46 states have (on average 3.0217391304347827) internal successors, (139), 45 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) [2021-11-19 14:09:47,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:09:47,359 INFO L93 Difference]: Finished difference Result 6620 states and 8268 transitions. [2021-11-19 14:09:47,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-19 14:09:47,359 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.0217391304347827) internal successors, (139), 45 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 [2021-11-19 14:09:47,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:09:47,365 INFO L225 Difference]: With dead ends: 6620 [2021-11-19 14:09:47,366 INFO L226 Difference]: Without dead ends: 5867 [2021-11-19 14:09:47,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 19.5s TimeCoverageRelationStatistics Valid=1232, Invalid=5248, Unknown=0, NotChecked=0, Total=6480 [2021-11-19 14:09:47,369 INFO L933 BasicCegarLoop]: 319 mSDtfsCounter, 1829 mSDsluCounter, 3471 mSDsCounter, 0 mSdLazyCounter, 3463 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1829 SdHoareTripleChecker+Valid, 3753 SdHoareTripleChecker+Invalid, 3508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 3463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:09:47,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1829 Valid, 3753 Invalid, 3508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 3463 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2021-11-19 14:09:47,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5867 states. [2021-11-19 14:09:48,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5867 to 5823. [2021-11-19 14:09:48,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5823 states, 5822 states have (on average 1.2488835451734799) internal successors, (7271), 5822 states have internal predecessors, (7271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:09:48,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5823 states to 5823 states and 7271 transitions. [2021-11-19 14:09:48,231 INFO L78 Accepts]: Start accepts. Automaton has 5823 states and 7271 transitions. Word has length 139 [2021-11-19 14:09:48,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:09:48,231 INFO L470 AbstractCegarLoop]: Abstraction has 5823 states and 7271 transitions. [2021-11-19 14:09:48,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.0217391304347827) internal successors, (139), 45 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) [2021-11-19 14:09:48,232 INFO L276 IsEmpty]: Start isEmpty. Operand 5823 states and 7271 transitions. [2021-11-19 14:09:48,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-19 14:09:48,234 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:09:48,234 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] [2021-11-19 14:09:48,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-19 14:09:48,235 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:09:48,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:09:48,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1771576589, now seen corresponding path program 1 times [2021-11-19 14:09:48,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:09:48,236 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090591068] [2021-11-19 14:09:48,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:09:48,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:09:48,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:09:59,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:09:59,606 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:09:59,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090591068] [2021-11-19 14:09:59,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090591068] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:09:59,606 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:09:59,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2021-11-19 14:09:59,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734040445] [2021-11-19 14:09:59,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:09:59,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-19 14:09:59,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:09:59,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-19 14:09:59,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=1893, Unknown=0, NotChecked=0, Total=2162 [2021-11-19 14:09:59,608 INFO L87 Difference]: Start difference. First operand 5823 states and 7271 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) [2021-11-19 14:10:17,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:10:17,852 INFO L93 Difference]: Finished difference Result 6734 states and 8428 transitions. [2021-11-19 14:10:17,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-19 14:10:17,852 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 [2021-11-19 14:10:17,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:10:17,858 INFO L225 Difference]: With dead ends: 6734 [2021-11-19 14:10:17,858 INFO L226 Difference]: Without dead ends: 5826 [2021-11-19 14:10:17,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1501 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=1319, Invalid=5991, Unknown=0, NotChecked=0, Total=7310 [2021-11-19 14:10:17,860 INFO L933 BasicCegarLoop]: 303 mSDtfsCounter, 1387 mSDsluCounter, 4505 mSDsCounter, 0 mSdLazyCounter, 4781 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1387 SdHoareTripleChecker+Valid, 4762 SdHoareTripleChecker+Invalid, 4815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 4781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:10:17,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1387 Valid, 4762 Invalid, 4815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 4781 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2021-11-19 14:10:17,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5826 states. [2021-11-19 14:10:18,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5826 to 5822. [2021-11-19 14:10:18,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5822 states, 5821 states have (on average 1.2480673423810342) internal successors, (7265), 5821 states have internal predecessors, (7265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:10:18,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5822 states to 5822 states and 7265 transitions. [2021-11-19 14:10:18,650 INFO L78 Accepts]: Start accepts. Automaton has 5822 states and 7265 transitions. Word has length 139 [2021-11-19 14:10:18,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:10:18,651 INFO L470 AbstractCegarLoop]: Abstraction has 5822 states and 7265 transitions. [2021-11-19 14:10:18,651 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) [2021-11-19 14:10:18,651 INFO L276 IsEmpty]: Start isEmpty. Operand 5822 states and 7265 transitions. [2021-11-19 14:10:18,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-19 14:10:18,653 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:10:18,653 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] [2021-11-19 14:10:18,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-19 14:10:18,654 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:10:18,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:10:18,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1122711639, now seen corresponding path program 1 times [2021-11-19 14:10:18,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:10:18,654 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119504047] [2021-11-19 14:10:18,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:10:18,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:10:18,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:10:32,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:10:32,423 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:10:32,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119504047] [2021-11-19 14:10:32,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119504047] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:10:32,423 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:10:32,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2021-11-19 14:10:32,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705896399] [2021-11-19 14:10:32,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:10:32,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-19 14:10:32,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:10:32,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-19 14:10:32,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=1751, Unknown=0, NotChecked=0, Total=2070 [2021-11-19 14:10:32,425 INFO L87 Difference]: Start difference. First operand 5822 states and 7265 transitions. Second operand has 46 states, 46 states have (on average 3.0217391304347827) internal successors, (139), 45 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) [2021-11-19 14:10:55,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:10:55,958 INFO L93 Difference]: Finished difference Result 6328 states and 7922 transitions. [2021-11-19 14:10:55,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-19 14:10:55,959 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.0217391304347827) internal successors, (139), 45 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 [2021-11-19 14:10:55,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:10:55,964 INFO L225 Difference]: With dead ends: 6328 [2021-11-19 14:10:55,964 INFO L226 Difference]: Without dead ends: 6045 [2021-11-19 14:10:55,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1586 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=1323, Invalid=5649, Unknown=0, NotChecked=0, Total=6972 [2021-11-19 14:10:55,967 INFO L933 BasicCegarLoop]: 363 mSDtfsCounter, 1970 mSDsluCounter, 4514 mSDsCounter, 0 mSdLazyCounter, 5115 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1970 SdHoareTripleChecker+Valid, 4789 SdHoareTripleChecker+Invalid, 5170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 5115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:10:55,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1970 Valid, 4789 Invalid, 5170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 5115 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2021-11-19 14:10:55,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6045 states. [2021-11-19 14:10:56,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6045 to 5995. [2021-11-19 14:10:56,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5995 states, 5994 states have (on average 1.2510844177510845) internal successors, (7499), 5994 states have internal predecessors, (7499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:10:56,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5995 states to 5995 states and 7499 transitions. [2021-11-19 14:10:56,822 INFO L78 Accepts]: Start accepts. Automaton has 5995 states and 7499 transitions. Word has length 139 [2021-11-19 14:10:56,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:10:56,822 INFO L470 AbstractCegarLoop]: Abstraction has 5995 states and 7499 transitions. [2021-11-19 14:10:56,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.0217391304347827) internal successors, (139), 45 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) [2021-11-19 14:10:56,822 INFO L276 IsEmpty]: Start isEmpty. Operand 5995 states and 7499 transitions. [2021-11-19 14:10:56,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-19 14:10:56,825 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:10:56,825 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] [2021-11-19 14:10:56,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-19 14:10:56,825 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:10:56,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:10:56,825 INFO L85 PathProgramCache]: Analyzing trace with hash 31494487, now seen corresponding path program 1 times [2021-11-19 14:10:56,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:10:56,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107696511] [2021-11-19 14:10:56,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:10:56,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:10:56,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:11:10,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:11:10,820 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:11:10,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107696511] [2021-11-19 14:11:10,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107696511] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:11:10,820 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:11:10,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2021-11-19 14:11:10,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771074470] [2021-11-19 14:11:10,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:11:10,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-19 14:11:10,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:11:10,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-19 14:11:10,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=1817, Unknown=0, NotChecked=0, Total=2070 [2021-11-19 14:11:10,822 INFO L87 Difference]: Start difference. First operand 5995 states and 7499 transitions. Second operand has 46 states, 46 states have (on average 3.0217391304347827) internal successors, (139), 45 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) [2021-11-19 14:11:34,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:11:34,283 INFO L93 Difference]: Finished difference Result 6752 states and 8455 transitions. [2021-11-19 14:11:34,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-19 14:11:34,284 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.0217391304347827) internal successors, (139), 45 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 [2021-11-19 14:11:34,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:11:34,289 INFO L225 Difference]: With dead ends: 6752 [2021-11-19 14:11:34,290 INFO L226 Difference]: Without dead ends: 6042 [2021-11-19 14:11:34,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1391 ImplicationChecksByTransitivity, 23.9s TimeCoverageRelationStatistics Valid=1323, Invalid=5817, Unknown=0, NotChecked=0, Total=7140 [2021-11-19 14:11:34,292 INFO L933 BasicCegarLoop]: 302 mSDtfsCounter, 1974 mSDsluCounter, 2911 mSDsCounter, 0 mSdLazyCounter, 2877 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1974 SdHoareTripleChecker+Valid, 3179 SdHoareTripleChecker+Invalid, 2923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 2877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:11:34,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1974 Valid, 3179 Invalid, 2923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 2877 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-11-19 14:11:34,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6042 states. [2021-11-19 14:11:35,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6042 to 5994. [2021-11-19 14:11:35,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5994 states, 5993 states have (on average 1.2506257300183548) internal successors, (7495), 5993 states have internal predecessors, (7495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:11:35,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5994 states to 5994 states and 7495 transitions. [2021-11-19 14:11:35,246 INFO L78 Accepts]: Start accepts. Automaton has 5994 states and 7495 transitions. Word has length 139 [2021-11-19 14:11:35,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:11:35,246 INFO L470 AbstractCegarLoop]: Abstraction has 5994 states and 7495 transitions. [2021-11-19 14:11:35,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.0217391304347827) internal successors, (139), 45 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) [2021-11-19 14:11:35,246 INFO L276 IsEmpty]: Start isEmpty. Operand 5994 states and 7495 transitions. [2021-11-19 14:11:35,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-19 14:11:35,249 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:11:35,249 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] [2021-11-19 14:11:35,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-19 14:11:35,249 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:11:35,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:11:35,249 INFO L85 PathProgramCache]: Analyzing trace with hash -671088830, now seen corresponding path program 1 times [2021-11-19 14:11:35,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:11:35,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992519885] [2021-11-19 14:11:35,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:11:35,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:11:35,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:11:36,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:11:36,045 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:11:36,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992519885] [2021-11-19 14:11:36,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992519885] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:11:36,045 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:11:36,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-19 14:11:36,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910480809] [2021-11-19 14:11:36,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:11:36,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-19 14:11:36,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:11:36,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-19 14:11:36,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-11-19 14:11:36,046 INFO L87 Difference]: Start difference. First operand 5994 states and 7495 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) [2021-11-19 14:11:39,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:11:39,924 INFO L93 Difference]: Finished difference Result 21313 states and 28244 transitions. [2021-11-19 14:11:39,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-19 14:11:39,925 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 [2021-11-19 14:11:39,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:11:39,945 INFO L225 Difference]: With dead ends: 21313 [2021-11-19 14:11:39,945 INFO L226 Difference]: Without dead ends: 17122 [2021-11-19 14:11:39,950 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 [2021-11-19 14:11:39,951 INFO L933 BasicCegarLoop]: 222 mSDtfsCounter, 1032 mSDsluCounter, 2176 mSDsCounter, 0 mSdLazyCounter, 947 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1032 SdHoareTripleChecker+Valid, 2341 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:11:39,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1032 Valid, 2341 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 947 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 14:11:39,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17122 states. [2021-11-19 14:11:41,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17122 to 8578. [2021-11-19 14:11:41,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8578 states, 8577 states have (on average 1.2611635770082779) internal successors, (10817), 8577 states have internal predecessors, (10817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:11:41,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8578 states to 8578 states and 10817 transitions. [2021-11-19 14:11:41,547 INFO L78 Accepts]: Start accepts. Automaton has 8578 states and 10817 transitions. Word has length 141 [2021-11-19 14:11:41,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:11:41,547 INFO L470 AbstractCegarLoop]: Abstraction has 8578 states and 10817 transitions. [2021-11-19 14:11:41,547 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) [2021-11-19 14:11:41,548 INFO L276 IsEmpty]: Start isEmpty. Operand 8578 states and 10817 transitions. [2021-11-19 14:11:41,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-19 14:11:41,550 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:11:41,550 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] [2021-11-19 14:11:41,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-19 14:11:41,551 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:11:41,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:11:41,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1292101867, now seen corresponding path program 1 times [2021-11-19 14:11:41,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:11:41,552 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018033608] [2021-11-19 14:11:41,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:11:41,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:11:41,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:12:05,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:12:05,710 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:12:05,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018033608] [2021-11-19 14:12:05,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018033608] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:12:05,711 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:12:05,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2021-11-19 14:12:05,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552307720] [2021-11-19 14:12:05,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:12:05,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-19 14:12:05,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:12:05,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-19 14:12:05,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=2187, Unknown=0, NotChecked=0, Total=2450 [2021-11-19 14:12:05,713 INFO L87 Difference]: Start difference. First operand 8578 states and 10817 transitions. Second operand has 50 states, 50 states have (on average 2.9) internal successors, (145), 49 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) [2021-11-19 14:12:50,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:12:50,157 INFO L93 Difference]: Finished difference Result 9033 states and 11393 transitions. [2021-11-19 14:12:50,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-19 14:12:50,165 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.9) internal successors, (145), 49 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 [2021-11-19 14:12:50,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:12:50,175 INFO L225 Difference]: With dead ends: 9033 [2021-11-19 14:12:50,175 INFO L226 Difference]: Without dead ends: 8753 [2021-11-19 14:12:50,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1496 ImplicationChecksByTransitivity, 38.7s TimeCoverageRelationStatistics Valid=1463, Invalid=6727, Unknown=0, NotChecked=0, Total=8190 [2021-11-19 14:12:50,178 INFO L933 BasicCegarLoop]: 356 mSDtfsCounter, 1820 mSDsluCounter, 7461 mSDsCounter, 0 mSdLazyCounter, 8285 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1820 SdHoareTripleChecker+Valid, 7681 SdHoareTripleChecker+Invalid, 8334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 8285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:12:50,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1820 Valid, 7681 Invalid, 8334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 8285 Invalid, 0 Unknown, 0 Unchecked, 12.4s Time] [2021-11-19 14:12:50,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8753 states. [2021-11-19 14:12:51,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8753 to 8741. [2021-11-19 14:12:51,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8741 states, 8740 states have (on average 1.2617848970251717) internal successors, (11028), 8740 states have internal predecessors, (11028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:12:51,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8741 states to 8741 states and 11028 transitions. [2021-11-19 14:12:51,860 INFO L78 Accepts]: Start accepts. Automaton has 8741 states and 11028 transitions. Word has length 145 [2021-11-19 14:12:51,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:12:51,860 INFO L470 AbstractCegarLoop]: Abstraction has 8741 states and 11028 transitions. [2021-11-19 14:12:51,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.9) internal successors, (145), 49 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) [2021-11-19 14:12:51,861 INFO L276 IsEmpty]: Start isEmpty. Operand 8741 states and 11028 transitions. [2021-11-19 14:12:51,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-19 14:12:51,863 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:12:51,863 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] [2021-11-19 14:12:51,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-19 14:12:51,864 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:12:51,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:12:51,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1752579294, now seen corresponding path program 1 times [2021-11-19 14:12:51,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:12:51,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484337700] [2021-11-19 14:12:51,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:12:51,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:12:52,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:13:05,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:13:05,682 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:13:05,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484337700] [2021-11-19 14:13:05,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484337700] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:13:05,683 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:13:05,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2021-11-19 14:13:05,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847385517] [2021-11-19 14:13:05,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:13:05,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-19 14:13:05,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:13:05,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-19 14:13:05,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=434, Invalid=1822, Unknown=0, NotChecked=0, Total=2256 [2021-11-19 14:13:05,684 INFO L87 Difference]: Start difference. First operand 8741 states and 11028 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) [2021-11-19 14:13:25,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:13:25,609 INFO L93 Difference]: Finished difference Result 10114 states and 12850 transitions. [2021-11-19 14:13:25,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-19 14:13:25,610 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 [2021-11-19 14:13:25,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:13:25,618 INFO L225 Difference]: With dead ends: 10114 [2021-11-19 14:13:25,618 INFO L226 Difference]: Without dead ends: 9858 [2021-11-19 14:13:25,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1594 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=1170, Invalid=5636, Unknown=0, NotChecked=0, Total=6806 [2021-11-19 14:13:25,621 INFO L933 BasicCegarLoop]: 350 mSDtfsCounter, 1487 mSDsluCounter, 5166 mSDsCounter, 0 mSdLazyCounter, 5327 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1487 SdHoareTripleChecker+Valid, 5395 SdHoareTripleChecker+Invalid, 5374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 5327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:13:25,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1487 Valid, 5395 Invalid, 5374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 5327 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2021-11-19 14:13:25,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9858 states. [2021-11-19 14:13:27,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9858 to 8849. [2021-11-19 14:13:27,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8849 states, 8848 states have (on average 1.2619801084990958) internal successors, (11166), 8848 states have internal predecessors, (11166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:13:27,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8849 states to 8849 states and 11166 transitions. [2021-11-19 14:13:27,202 INFO L78 Accepts]: Start accepts. Automaton has 8849 states and 11166 transitions. Word has length 145 [2021-11-19 14:13:27,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:13:27,202 INFO L470 AbstractCegarLoop]: Abstraction has 8849 states and 11166 transitions. [2021-11-19 14:13:27,203 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) [2021-11-19 14:13:27,203 INFO L276 IsEmpty]: Start isEmpty. Operand 8849 states and 11166 transitions. [2021-11-19 14:13:27,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-19 14:13:27,205 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:13:27,205 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] [2021-11-19 14:13:27,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-11-19 14:13:27,205 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:13:27,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:13:27,206 INFO L85 PathProgramCache]: Analyzing trace with hash 845847822, now seen corresponding path program 1 times [2021-11-19 14:13:27,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:13:27,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687471023] [2021-11-19 14:13:27,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:13:27,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:13:27,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:13:37,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:13:37,853 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:13:37,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687471023] [2021-11-19 14:13:37,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687471023] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:13:37,853 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:13:37,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2021-11-19 14:13:37,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618522120] [2021-11-19 14:13:37,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:13:37,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-19 14:13:37,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:13:37,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-19 14:13:37,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1846, Unknown=0, NotChecked=0, Total=2070 [2021-11-19 14:13:37,855 INFO L87 Difference]: Start difference. First operand 8849 states and 11166 transitions. Second operand has 46 states, 46 states have (on average 3.152173913043478) internal successors, (145), 45 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)