./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.1.ufo.BOUNDED-14.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_68900004-20b9-475b-a1b1-1a25b11c9282/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68900004-20b9-475b-a1b1-1a25b11c9282/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_68900004-20b9-475b-a1b1-1a25b11c9282/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68900004-20b9-475b-a1b1-1a25b11c9282/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.1.ufo.BOUNDED-14.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68900004-20b9-475b-a1b1-1a25b11c9282/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_68900004-20b9-475b-a1b1-1a25b11c9282/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 59df1758127560236621fddca0cfb7b951a4ad9d8bd949539c1385f0c08fd544 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:34:50,702 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:34:50,705 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:34:50,767 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:34:50,768 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:34:50,770 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:34:50,772 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:34:50,775 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:34:50,778 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:34:50,779 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:34:50,781 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:34:50,783 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:34:50,785 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:34:50,790 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:34:50,792 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:34:50,796 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:34:50,799 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:34:50,801 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:34:50,811 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:34:50,815 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:34:50,817 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:34:50,819 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:34:50,821 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:34:50,822 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:34:50,827 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:34:50,828 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:34:50,828 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:34:50,830 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:34:50,830 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:34:50,832 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:34:50,833 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:34:50,834 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:34:50,835 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:34:50,836 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:34:50,838 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:34:50,838 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:34:50,840 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:34:50,840 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:34:50,841 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:34:50,842 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:34:50,843 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:34:50,845 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68900004-20b9-475b-a1b1-1a25b11c9282/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 13:34:50,878 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:34:50,879 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:34:50,880 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:34:50,880 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:34:50,881 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:34:50,881 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:34:50,882 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:34:50,882 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 13:34:50,882 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:34:50,883 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:34:50,883 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 13:34:50,883 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 13:34:50,884 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:34:50,884 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 13:34:50,884 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 13:34:50,885 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 13:34:50,886 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:34:50,886 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 13:34:50,887 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 13:34:50,887 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 13:34:50,887 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:34:50,888 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:34:50,888 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:34:50,888 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:34:50,889 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:34:50,889 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 13:34:50,889 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:34:50,889 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:34:50,890 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:34:50,890 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:34:50,890 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:34:50,891 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:34:50,891 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:34:50,891 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:34:50,892 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:34:50,892 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 13:34:50,892 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 13:34:50,892 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:34:50,893 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:34:50,893 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:34:50,893 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_68900004-20b9-475b-a1b1-1a25b11c9282/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68900004-20b9-475b-a1b1-1a25b11c9282/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 59df1758127560236621fddca0cfb7b951a4ad9d8bd949539c1385f0c08fd544 [2021-11-19 13:34:51,235 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:34:51,265 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:34:51,268 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:34:51,270 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:34:51,272 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:34:51,273 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68900004-20b9-475b-a1b1-1a25b11c9282/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.1.ufo.BOUNDED-14.pals.c.v+nlh-reducer.c [2021-11-19 13:34:51,368 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68900004-20b9-475b-a1b1-1a25b11c9282/bin/utaipan-UbGMyvGFUs/data/71542cd4f/13b02eba006147f5a076dbc44192aa15/FLAGea48d0820 [2021-11-19 13:34:52,065 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:34:52,066 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68900004-20b9-475b-a1b1-1a25b11c9282/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.1.ufo.BOUNDED-14.pals.c.v+nlh-reducer.c [2021-11-19 13:34:52,082 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68900004-20b9-475b-a1b1-1a25b11c9282/bin/utaipan-UbGMyvGFUs/data/71542cd4f/13b02eba006147f5a076dbc44192aa15/FLAGea48d0820 [2021-11-19 13:34:52,272 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68900004-20b9-475b-a1b1-1a25b11c9282/bin/utaipan-UbGMyvGFUs/data/71542cd4f/13b02eba006147f5a076dbc44192aa15 [2021-11-19 13:34:52,275 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:34:52,277 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:34:52,279 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:34:52,280 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:34:52,284 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:34:52,285 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:34:52" (1/1) ... [2021-11-19 13:34:52,287 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54305672 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:34:52, skipping insertion in model container [2021-11-19 13:34:52,287 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:34:52" (1/1) ... [2021-11-19 13:34:52,297 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:34:52,372 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:34:52,707 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_68900004-20b9-475b-a1b1-1a25b11c9282/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.1.ufo.BOUNDED-14.pals.c.v+nlh-reducer.c[10527,10540] [2021-11-19 13:34:52,794 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:34:52,812 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 13:34:52,940 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_68900004-20b9-475b-a1b1-1a25b11c9282/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.1.ufo.BOUNDED-14.pals.c.v+nlh-reducer.c[10527,10540] [2021-11-19 13:34:53,023 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:34:53,046 INFO L208 MainTranslator]: Completed translation [2021-11-19 13:34:53,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:34:53 WrapperNode [2021-11-19 13:34:53,047 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:34:53,049 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 13:34:53,049 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 13:34:53,049 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 13:34:53,085 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:34:53" (1/1) ... [2021-11-19 13:34:53,114 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:34:53" (1/1) ... [2021-11-19 13:34:53,199 INFO L137 Inliner]: procedures = 26, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 843 [2021-11-19 13:34:53,199 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 13:34:53,200 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 13:34:53,201 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 13:34:53,201 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 13:34:53,225 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:34:53" (1/1) ... [2021-11-19 13:34:53,226 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:34:53" (1/1) ... [2021-11-19 13:34:53,234 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:34:53" (1/1) ... [2021-11-19 13:34:53,245 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:34:53" (1/1) ... [2021-11-19 13:34:53,283 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:34:53" (1/1) ... [2021-11-19 13:34:53,293 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:34:53" (1/1) ... [2021-11-19 13:34:53,297 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:34:53" (1/1) ... [2021-11-19 13:34:53,304 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 13:34:53,305 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 13:34:53,305 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 13:34:53,305 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 13:34:53,320 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:34:53" (1/1) ... [2021-11-19 13:34:53,330 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:34:53,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68900004-20b9-475b-a1b1-1a25b11c9282/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:34:53,368 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68900004-20b9-475b-a1b1-1a25b11c9282/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 13:34:53,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68900004-20b9-475b-a1b1-1a25b11c9282/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 13:34:53,430 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 13:34:53,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 13:34:53,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 13:34:53,431 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 13:34:53,629 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 13:34:53,632 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 13:34:54,553 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 13:34:54,845 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 13:34:54,845 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-19 13:34:54,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:34:54 BoogieIcfgContainer [2021-11-19 13:34:54,849 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 13:34:54,852 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 13:34:54,852 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 13:34:54,856 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 13:34:54,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 01:34:52" (1/3) ... [2021-11-19 13:34:54,858 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2026a6dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:34:54, skipping insertion in model container [2021-11-19 13:34:54,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:34:53" (2/3) ... [2021-11-19 13:34:54,859 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2026a6dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:34:54, skipping insertion in model container [2021-11-19 13:34:54,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:34:54" (3/3) ... [2021-11-19 13:34:54,861 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.7.1.ufo.BOUNDED-14.pals.c.v+nlh-reducer.c [2021-11-19 13:34:54,869 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 13:34:54,869 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 13:34:54,934 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 13:34:54,943 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 13:34:54,943 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 13:34:54,968 INFO L276 IsEmpty]: Start isEmpty. Operand has 147 states, 145 states have (on average 1.7724137931034483) internal successors, (257), 146 states have internal predecessors, (257), 0 states have call successors, (0), 0 states 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 13:34:54,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-19 13:34:54,982 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:34:54,983 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] [2021-11-19 13:34:54,984 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:34:54,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:34:54,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1794662925, now seen corresponding path program 1 times [2021-11-19 13:34:55,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:34:55,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842545733] [2021-11-19 13:34:55,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:55,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:34:55,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:55,597 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 13:34:55,598 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:34:55,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842545733] [2021-11-19 13:34:55,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842545733] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:34:55,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:34:55,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 13:34:55,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515503846] [2021-11-19 13:34:55,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:34:55,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:34:55,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:34:55,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:34:55,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:34:55,670 INFO L87 Difference]: Start difference. First operand has 147 states, 145 states have (on average 1.7724137931034483) internal successors, (257), 146 states have internal predecessors, (257), 0 states have call successors, (0), 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 18.6) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states 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 13:34:55,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:34:55,972 INFO L93 Difference]: Finished difference Result 226 states and 377 transitions. [2021-11-19 13:34:55,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:34:55,975 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 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 93 [2021-11-19 13:34:55,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:34:55,990 INFO L225 Difference]: With dead ends: 226 [2021-11-19 13:34:55,990 INFO L226 Difference]: Without dead ends: 145 [2021-11-19 13:34:55,994 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 13:34:55,999 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 614 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 614 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:34:56,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [614 Valid, 224 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:34:56,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-19 13:34:56,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-11-19 13:34:56,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.2083333333333333) internal successors, (174), 144 states have internal predecessors, (174), 0 states have call successors, (0), 0 states 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 13:34:56,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 174 transitions. [2021-11-19 13:34:56,061 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 174 transitions. Word has length 93 [2021-11-19 13:34:56,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:34:56,062 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 174 transitions. [2021-11-19 13:34:56,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states 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 13:34:56,063 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 174 transitions. [2021-11-19 13:34:56,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-19 13:34:56,073 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:34:56,074 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:34:56,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 13:34:56,075 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:34:56,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:34:56,076 INFO L85 PathProgramCache]: Analyzing trace with hash -560357399, now seen corresponding path program 1 times [2021-11-19 13:34:56,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:34:56,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266359373] [2021-11-19 13:34:56,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:56,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:34:56,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:56,358 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 13:34:56,360 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:34:56,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266359373] [2021-11-19 13:34:56,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266359373] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:34:56,362 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:34:56,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 13:34:56,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954028346] [2021-11-19 13:34:56,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:34:56,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:34:56,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:34:56,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:34:56,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:34:56,370 INFO L87 Difference]: Start difference. First operand 145 states and 174 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:34:56,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:34:56,640 INFO L93 Difference]: Finished difference Result 226 states and 281 transitions. [2021-11-19 13:34:56,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:34:56,642 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-11-19 13:34:56,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:34:56,650 INFO L225 Difference]: With dead ends: 226 [2021-11-19 13:34:56,650 INFO L226 Difference]: Without dead ends: 145 [2021-11-19 13:34:56,657 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 13:34:56,661 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 428 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:34:56,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [428 Valid, 107 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:34:56,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-19 13:34:56,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-11-19 13:34:56,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.1944444444444444) internal successors, (172), 144 states have internal predecessors, (172), 0 states have call successors, (0), 0 states 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 13:34:56,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 172 transitions. [2021-11-19 13:34:56,704 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 172 transitions. Word has length 94 [2021-11-19 13:34:56,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:34:56,709 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 172 transitions. [2021-11-19 13:34:56,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:34:56,711 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 172 transitions. [2021-11-19 13:34:56,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-19 13:34:56,720 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:34:56,721 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:34:56,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-19 13:34:56,722 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:34:56,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:34:56,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1397012301, now seen corresponding path program 1 times [2021-11-19 13:34:56,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:34:56,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845414845] [2021-11-19 13:34:56,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:56,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:34:56,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:57,017 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 13:34:57,020 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:34:57,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845414845] [2021-11-19 13:34:57,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845414845] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:34:57,021 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:34:57,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 13:34:57,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704590941] [2021-11-19 13:34:57,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:34:57,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:34:57,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:34:57,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:34:57,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:34:57,029 INFO L87 Difference]: Start difference. First operand 145 states and 172 transitions. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:34:57,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:34:57,252 INFO L93 Difference]: Finished difference Result 222 states and 273 transitions. [2021-11-19 13:34:57,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:34:57,253 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-11-19 13:34:57,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:34:57,256 INFO L225 Difference]: With dead ends: 222 [2021-11-19 13:34:57,256 INFO L226 Difference]: Without dead ends: 145 [2021-11-19 13:34:57,257 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 13:34:57,269 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 410 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:34:57,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [410 Valid, 115 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:34:57,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-19 13:34:57,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-11-19 13:34:57,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.1805555555555556) internal successors, (170), 144 states have internal predecessors, (170), 0 states have call successors, (0), 0 states 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 13:34:57,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 170 transitions. [2021-11-19 13:34:57,300 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 170 transitions. Word has length 95 [2021-11-19 13:34:57,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:34:57,301 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 170 transitions. [2021-11-19 13:34:57,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:34:57,301 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 170 transitions. [2021-11-19 13:34:57,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-19 13:34:57,303 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:34:57,303 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] [2021-11-19 13:34:57,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-19 13:34:57,304 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:34:57,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:34:57,305 INFO L85 PathProgramCache]: Analyzing trace with hash -524080995, now seen corresponding path program 1 times [2021-11-19 13:34:57,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:34:57,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748829305] [2021-11-19 13:34:57,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:57,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:34:57,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:57,530 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 13:34:57,530 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:34:57,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748829305] [2021-11-19 13:34:57,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748829305] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:34:57,531 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:34:57,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 13:34:57,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557728158] [2021-11-19 13:34:57,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:34:57,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:34:57,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:34:57,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:34:57,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:34:57,534 INFO L87 Difference]: Start difference. First operand 145 states and 170 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states 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 13:34:57,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:34:57,726 INFO L93 Difference]: Finished difference Result 230 states and 278 transitions. [2021-11-19 13:34:57,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:34:57,727 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 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 96 [2021-11-19 13:34:57,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:34:57,729 INFO L225 Difference]: With dead ends: 230 [2021-11-19 13:34:57,730 INFO L226 Difference]: Without dead ends: 145 [2021-11-19 13:34:57,734 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 13:34:57,743 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 427 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:34:57,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 99 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:34:57,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-19 13:34:57,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-11-19 13:34:57,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.1666666666666667) internal successors, (168), 144 states have internal predecessors, (168), 0 states have call successors, (0), 0 states 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 13:34:57,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 168 transitions. [2021-11-19 13:34:57,771 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 168 transitions. Word has length 96 [2021-11-19 13:34:57,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:34:57,772 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 168 transitions. [2021-11-19 13:34:57,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states 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 13:34:57,772 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 168 transitions. [2021-11-19 13:34:57,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-19 13:34:57,779 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:34:57,780 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] [2021-11-19 13:34:57,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-19 13:34:57,780 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:34:57,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:34:57,783 INFO L85 PathProgramCache]: Analyzing trace with hash 300445019, now seen corresponding path program 1 times [2021-11-19 13:34:57,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:34:57,783 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802146744] [2021-11-19 13:34:57,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:57,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:34:57,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:57,937 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 13:34:57,938 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:34:57,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802146744] [2021-11-19 13:34:57,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802146744] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:34:57,938 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:34:57,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 13:34:57,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676249855] [2021-11-19 13:34:57,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:34:57,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:34:57,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:34:57,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:34:57,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:34:57,941 INFO L87 Difference]: Start difference. First operand 145 states and 168 transitions. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states 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 13:34:58,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:34:58,146 INFO L93 Difference]: Finished difference Result 234 states and 279 transitions. [2021-11-19 13:34:58,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:34:58,147 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 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 97 [2021-11-19 13:34:58,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:34:58,149 INFO L225 Difference]: With dead ends: 234 [2021-11-19 13:34:58,150 INFO L226 Difference]: Without dead ends: 145 [2021-11-19 13:34:58,151 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 13:34:58,153 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 361 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:34:58,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 123 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:34:58,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-19 13:34:58,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-11-19 13:34:58,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.1597222222222223) internal successors, (167), 144 states have internal predecessors, (167), 0 states have call successors, (0), 0 states 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 13:34:58,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 167 transitions. [2021-11-19 13:34:58,190 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 167 transitions. Word has length 97 [2021-11-19 13:34:58,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:34:58,192 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 167 transitions. [2021-11-19 13:34:58,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states 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 13:34:58,193 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 167 transitions. [2021-11-19 13:34:58,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-19 13:34:58,195 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:34:58,201 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] [2021-11-19 13:34:58,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-19 13:34:58,202 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:34:58,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:34:58,204 INFO L85 PathProgramCache]: Analyzing trace with hash -165671855, now seen corresponding path program 1 times [2021-11-19 13:34:58,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:34:58,204 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638529962] [2021-11-19 13:34:58,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:58,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:34:58,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:58,349 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 13:34:58,350 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:34:58,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638529962] [2021-11-19 13:34:58,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638529962] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:34:58,351 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:34:58,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 13:34:58,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452762472] [2021-11-19 13:34:58,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:34:58,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:34:58,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:34:58,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:34:58,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:34:58,354 INFO L87 Difference]: Start difference. First operand 145 states and 167 transitions. Second operand has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states 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 13:34:58,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:34:58,506 INFO L93 Difference]: Finished difference Result 210 states and 252 transitions. [2021-11-19 13:34:58,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:34:58,507 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 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 98 [2021-11-19 13:34:58,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:34:58,509 INFO L225 Difference]: With dead ends: 210 [2021-11-19 13:34:58,509 INFO L226 Difference]: Without dead ends: 145 [2021-11-19 13:34:58,509 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 13:34:58,511 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 361 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:34:58,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 139 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:34:58,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-19 13:34:58,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-11-19 13:34:58,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.1458333333333333) internal successors, (165), 144 states have internal predecessors, (165), 0 states have call successors, (0), 0 states 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 13:34:58,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 165 transitions. [2021-11-19 13:34:58,534 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 165 transitions. Word has length 98 [2021-11-19 13:34:58,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:34:58,535 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 165 transitions. [2021-11-19 13:34:58,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states 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 13:34:58,535 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 165 transitions. [2021-11-19 13:34:58,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-19 13:34:58,536 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:34:58,536 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] [2021-11-19 13:34:58,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-19 13:34:58,537 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:34:58,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:34:58,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1667675829, now seen corresponding path program 1 times [2021-11-19 13:34:58,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:34:58,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707950257] [2021-11-19 13:34:58,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:58,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:34:58,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:58,686 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 13:34:58,687 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:34:58,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707950257] [2021-11-19 13:34:58,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707950257] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:34:58,687 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:34:58,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 13:34:58,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461955694] [2021-11-19 13:34:58,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:34:58,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:34:58,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:34:58,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:34:58,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:34:58,690 INFO L87 Difference]: Start difference. First operand 145 states and 165 transitions. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states 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 13:34:58,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:34:58,859 INFO L93 Difference]: Finished difference Result 214 states and 253 transitions. [2021-11-19 13:34:58,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:34:58,860 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 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 99 [2021-11-19 13:34:58,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:34:58,861 INFO L225 Difference]: With dead ends: 214 [2021-11-19 13:34:58,862 INFO L226 Difference]: Without dead ends: 145 [2021-11-19 13:34:58,862 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 13:34:58,864 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 363 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:34:58,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 131 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:34:58,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-19 13:34:58,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-11-19 13:34:58,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.1319444444444444) internal successors, (163), 144 states have internal predecessors, (163), 0 states have call successors, (0), 0 states 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 13:34:58,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 163 transitions. [2021-11-19 13:34:58,885 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 163 transitions. Word has length 99 [2021-11-19 13:34:58,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:34:58,886 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 163 transitions. [2021-11-19 13:34:58,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states 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 13:34:58,886 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 163 transitions. [2021-11-19 13:34:58,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-19 13:34:58,891 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:34:58,891 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] [2021-11-19 13:34:58,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-19 13:34:58,892 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:34:58,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:34:58,893 INFO L85 PathProgramCache]: Analyzing trace with hash 2111860485, now seen corresponding path program 1 times [2021-11-19 13:34:58,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:34:58,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658967958] [2021-11-19 13:34:58,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:58,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:34:59,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:35:16,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:35:16,573 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:35:16,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658967958] [2021-11-19 13:35:16,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658967958] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:35:16,573 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:35:16,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2021-11-19 13:35:16,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884181438] [2021-11-19 13:35:16,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:35:16,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-19 13:35:16,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:35:16,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-19 13:35:16,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=2053, Unknown=0, NotChecked=0, Total=2256 [2021-11-19 13:35:16,578 INFO L87 Difference]: Start difference. First operand 145 states and 163 transitions. Second operand has 48 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 47 states have internal predecessors, (100), 0 states have call successors, (0), 0 states 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 13:35:40,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:35:40,108 INFO L93 Difference]: Finished difference Result 301 states and 373 transitions. [2021-11-19 13:35:40,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-19 13:35:40,109 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 47 states have internal predecessors, (100), 0 states have call successors, (0), 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 100 [2021-11-19 13:35:40,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:35:40,112 INFO L225 Difference]: With dead ends: 301 [2021-11-19 13:35:40,112 INFO L226 Difference]: Without dead ends: 249 [2021-11-19 13:35:40,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 25.5s TimeCoverageRelationStatistics Valid=1721, Invalid=5419, Unknown=0, NotChecked=0, Total=7140 [2021-11-19 13:35:40,118 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 1549 mSDsluCounter, 1762 mSDsCounter, 0 mSdLazyCounter, 3168 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1549 SdHoareTripleChecker+Valid, 1933 SdHoareTripleChecker+Invalid, 3237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 3168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:35:40,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1549 Valid, 1933 Invalid, 3237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 3168 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2021-11-19 13:35:40,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-11-19 13:35:40,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 245. [2021-11-19 13:35:40,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 1.2254098360655739) internal successors, (299), 244 states have internal predecessors, (299), 0 states have call successors, (0), 0 states 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 13:35:40,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 299 transitions. [2021-11-19 13:35:40,166 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 299 transitions. Word has length 100 [2021-11-19 13:35:40,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:35:40,167 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 299 transitions. [2021-11-19 13:35:40,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 47 states have internal predecessors, (100), 0 states have call successors, (0), 0 states 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 13:35:40,168 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 299 transitions. [2021-11-19 13:35:40,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-19 13:35:40,169 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:35:40,169 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] [2021-11-19 13:35:40,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-19 13:35:40,170 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:35:40,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:35:40,171 INFO L85 PathProgramCache]: Analyzing trace with hash -780953175, now seen corresponding path program 1 times [2021-11-19 13:35:40,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:35:40,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292497367] [2021-11-19 13:35:40,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:35:40,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:35:40,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:00,793 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 13:36:00,793 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:36:00,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292497367] [2021-11-19 13:36:00,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292497367] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:36:00,794 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:36:00,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2021-11-19 13:36:00,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813285125] [2021-11-19 13:36:00,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:36:00,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-19 13:36:00,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:36:00,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-19 13:36:00,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=2521, Unknown=0, NotChecked=0, Total=2756 [2021-11-19 13:36:00,798 INFO L87 Difference]: Start difference. First operand 245 states and 299 transitions. Second operand has 53 states, 53 states have (on average 1.9245283018867925) internal successors, (102), 52 states have internal predecessors, (102), 0 states have call successors, (0), 0 states 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 13:36:31,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:36:31,373 INFO L93 Difference]: Finished difference Result 456 states and 583 transitions. [2021-11-19 13:36:31,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-19 13:36:31,374 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.9245283018867925) internal successors, (102), 52 states have internal predecessors, (102), 0 states have call successors, (0), 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 102 [2021-11-19 13:36:31,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:36:31,376 INFO L225 Difference]: With dead ends: 456 [2021-11-19 13:36:31,376 INFO L226 Difference]: Without dead ends: 304 [2021-11-19 13:36:31,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1179 ImplicationChecksByTransitivity, 34.3s TimeCoverageRelationStatistics Valid=2223, Invalid=7677, Unknown=0, NotChecked=0, Total=9900 [2021-11-19 13:36:31,380 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 1341 mSDsluCounter, 1569 mSDsCounter, 0 mSdLazyCounter, 3481 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1341 SdHoareTripleChecker+Valid, 1686 SdHoareTripleChecker+Invalid, 3526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 3481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-11-19 13:36:31,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1341 Valid, 1686 Invalid, 3526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 3481 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2021-11-19 13:36:31,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-11-19 13:36:31,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 297. [2021-11-19 13:36:31,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 1.2432432432432432) internal successors, (368), 296 states have internal predecessors, (368), 0 states have call successors, (0), 0 states 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 13:36:31,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 368 transitions. [2021-11-19 13:36:31,423 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 368 transitions. Word has length 102 [2021-11-19 13:36:31,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:36:31,424 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 368 transitions. [2021-11-19 13:36:31,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.9245283018867925) internal successors, (102), 52 states have internal predecessors, (102), 0 states have call successors, (0), 0 states 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 13:36:31,425 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 368 transitions. [2021-11-19 13:36:31,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-19 13:36:31,426 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:36:31,426 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] [2021-11-19 13:36:31,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-19 13:36:31,426 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:36:31,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:36:31,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1007245611, now seen corresponding path program 1 times [2021-11-19 13:36:31,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:36:31,427 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785653287] [2021-11-19 13:36:31,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:31,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:36:31,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:31,544 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 13:36:31,545 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:36:31,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785653287] [2021-11-19 13:36:31,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785653287] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:36:31,545 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:36:31,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 13:36:31,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292525472] [2021-11-19 13:36:31,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:36:31,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:36:31,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:36:31,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:36:31,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:36:31,547 INFO L87 Difference]: Start difference. First operand 297 states and 368 transitions. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states 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 13:36:31,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:36:31,656 INFO L93 Difference]: Finished difference Result 600 states and 777 transitions. [2021-11-19 13:36:31,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:36:31,657 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 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 102 [2021-11-19 13:36:31,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:36:31,660 INFO L225 Difference]: With dead ends: 600 [2021-11-19 13:36:31,660 INFO L226 Difference]: Without dead ends: 398 [2021-11-19 13:36:31,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:36:31,661 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 149 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:36:31,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 341 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:36:31,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-11-19 13:36:31,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 396. [2021-11-19 13:36:31,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 1.2658227848101267) internal successors, (500), 395 states have internal predecessors, (500), 0 states have call successors, (0), 0 states 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 13:36:31,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 500 transitions. [2021-11-19 13:36:31,716 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 500 transitions. Word has length 102 [2021-11-19 13:36:31,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:36:31,717 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 500 transitions. [2021-11-19 13:36:31,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states 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 13:36:31,717 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 500 transitions. [2021-11-19 13:36:31,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-19 13:36:31,718 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:36:31,719 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] [2021-11-19 13:36:31,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-19 13:36:31,719 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:36:31,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:36:31,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1575178096, now seen corresponding path program 1 times [2021-11-19 13:36:31,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:36:31,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050722693] [2021-11-19 13:36:31,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:31,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:36:31,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:31,825 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 13:36:31,825 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:36:31,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050722693] [2021-11-19 13:36:31,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050722693] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:36:31,826 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:36:31,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 13:36:31,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793641767] [2021-11-19 13:36:31,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:36:31,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:36:31,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:36:31,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:36:31,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:36:31,828 INFO L87 Difference]: Start difference. First operand 396 states and 500 transitions. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states 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 13:36:32,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:36:32,111 INFO L93 Difference]: Finished difference Result 782 states and 1014 transitions. [2021-11-19 13:36:32,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 13:36:32,112 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 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 103 [2021-11-19 13:36:32,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:36:32,117 INFO L225 Difference]: With dead ends: 782 [2021-11-19 13:36:32,118 INFO L226 Difference]: Without dead ends: 680 [2021-11-19 13:36:32,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:36:32,119 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 339 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 866 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:36:32,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 866 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:36:32,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-11-19 13:36:32,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 347. [2021-11-19 13:36:32,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 1.2427745664739884) internal successors, (430), 346 states have internal predecessors, (430), 0 states have call successors, (0), 0 states 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 13:36:32,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 430 transitions. [2021-11-19 13:36:32,194 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 430 transitions. Word has length 103 [2021-11-19 13:36:32,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:36:32,195 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 430 transitions. [2021-11-19 13:36:32,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states 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 13:36:32,195 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 430 transitions. [2021-11-19 13:36:32,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-19 13:36:32,196 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:36:32,197 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:36:32,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-19 13:36:32,197 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:36:32,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:36:32,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1836935432, now seen corresponding path program 1 times [2021-11-19 13:36:32,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:36:32,198 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944761366] [2021-11-19 13:36:32,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:32,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:36:32,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:32,272 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:36:32,272 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:36:32,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944761366] [2021-11-19 13:36:32,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944761366] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:36:32,273 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:36:32,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 13:36:32,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464941026] [2021-11-19 13:36:32,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:36:32,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:36:32,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:36:32,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:36:32,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:36:32,275 INFO L87 Difference]: Start difference. First operand 347 states and 430 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states 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 13:36:32,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:36:32,383 INFO L93 Difference]: Finished difference Result 598 states and 765 transitions. [2021-11-19 13:36:32,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:36:32,384 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 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 122 [2021-11-19 13:36:32,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:36:32,387 INFO L225 Difference]: With dead ends: 598 [2021-11-19 13:36:32,387 INFO L226 Difference]: Without dead ends: 446 [2021-11-19 13:36:32,388 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 13:36:32,389 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 58 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:36:32,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 330 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:36:32,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-11-19 13:36:32,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 424. [2021-11-19 13:36:32,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 1.2411347517730495) internal successors, (525), 423 states have internal predecessors, (525), 0 states have call successors, (0), 0 states 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 13:36:32,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 525 transitions. [2021-11-19 13:36:32,457 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 525 transitions. Word has length 122 [2021-11-19 13:36:32,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:36:32,457 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 525 transitions. [2021-11-19 13:36:32,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states 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 13:36:32,458 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 525 transitions. [2021-11-19 13:36:32,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-19 13:36:32,460 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:36:32,460 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:36:32,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-19 13:36:32,461 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:36:32,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:36:32,461 INFO L85 PathProgramCache]: Analyzing trace with hash 437903144, now seen corresponding path program 1 times [2021-11-19 13:36:32,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:36:32,462 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266108627] [2021-11-19 13:36:32,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:32,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:36:32,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:32,539 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:36:32,539 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:36:32,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266108627] [2021-11-19 13:36:32,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266108627] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:36:32,539 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:36:32,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 13:36:32,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777953360] [2021-11-19 13:36:32,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:36:32,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:36:32,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:36:32,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:36:32,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:36:32,542 INFO L87 Difference]: Start difference. First operand 424 states and 525 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states 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 13:36:32,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:36:32,684 INFO L93 Difference]: Finished difference Result 821 states and 1056 transitions. [2021-11-19 13:36:32,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:36:32,685 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 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 125 [2021-11-19 13:36:32,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:36:32,689 INFO L225 Difference]: With dead ends: 821 [2021-11-19 13:36:32,689 INFO L226 Difference]: Without dead ends: 614 [2021-11-19 13:36:32,690 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 13:36:32,691 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 53 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:36:32,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 323 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:36:32,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-11-19 13:36:32,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 588. [2021-11-19 13:36:32,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 587 states have (on average 1.2657580919931857) internal successors, (743), 587 states have internal predecessors, (743), 0 states have call successors, (0), 0 states 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 13:36:32,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 743 transitions. [2021-11-19 13:36:32,797 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 743 transitions. Word has length 125 [2021-11-19 13:36:32,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:36:32,798 INFO L470 AbstractCegarLoop]: Abstraction has 588 states and 743 transitions. [2021-11-19 13:36:32,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states 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 13:36:32,798 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 743 transitions. [2021-11-19 13:36:32,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-19 13:36:32,800 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:36:32,800 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:36:32,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-19 13:36:32,800 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:36:32,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:36:32,802 INFO L85 PathProgramCache]: Analyzing trace with hash 10468842, now seen corresponding path program 1 times [2021-11-19 13:36:32,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:36:32,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085205892] [2021-11-19 13:36:32,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:32,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:36:32,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:32,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:36:32,879 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:36:32,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085205892] [2021-11-19 13:36:32,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085205892] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:36:32,880 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:36:32,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 13:36:32,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289893427] [2021-11-19 13:36:32,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:36:32,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:36:32,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:36:32,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:36:32,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:36:32,882 INFO L87 Difference]: Start difference. First operand 588 states and 743 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 13:36:33,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:36:33,071 INFO L93 Difference]: Finished difference Result 1295 states and 1684 transitions. [2021-11-19 13:36:33,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:36:33,072 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 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 128 [2021-11-19 13:36:33,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:36:33,078 INFO L225 Difference]: With dead ends: 1295 [2021-11-19 13:36:33,078 INFO L226 Difference]: Without dead ends: 936 [2021-11-19 13:36:33,079 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 13:36:33,080 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 48 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:36:33,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 316 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:36:33,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2021-11-19 13:36:33,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 898. [2021-11-19 13:36:33,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 897 states have (on average 1.2831661092530657) internal successors, (1151), 897 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states 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 13:36:33,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1151 transitions. [2021-11-19 13:36:33,252 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1151 transitions. Word has length 128 [2021-11-19 13:36:33,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:36:33,253 INFO L470 AbstractCegarLoop]: Abstraction has 898 states and 1151 transitions. [2021-11-19 13:36:33,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 13:36:33,253 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1151 transitions. [2021-11-19 13:36:33,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-19 13:36:33,256 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:36:33,256 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:36:33,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-19 13:36:33,257 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:36:33,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:36:33,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1212229378, now seen corresponding path program 1 times [2021-11-19 13:36:33,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:36:33,258 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667184762] [2021-11-19 13:36:33,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:33,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:36:33,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:33,342 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:36:33,343 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:36:33,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667184762] [2021-11-19 13:36:33,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667184762] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:36:33,343 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:36:33,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 13:36:33,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956850664] [2021-11-19 13:36:33,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:36:33,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:36:33,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:36:33,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:36:33,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:36:33,345 INFO L87 Difference]: Start difference. First operand 898 states and 1151 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states 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 13:36:33,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:36:33,621 INFO L93 Difference]: Finished difference Result 2207 states and 2888 transitions. [2021-11-19 13:36:33,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:36:33,622 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 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 131 [2021-11-19 13:36:33,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:36:33,632 INFO L225 Difference]: With dead ends: 2207 [2021-11-19 13:36:33,632 INFO L226 Difference]: Without dead ends: 1550 [2021-11-19 13:36:33,636 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 13:36:33,637 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 43 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:36:33,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 309 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:36:33,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1550 states. [2021-11-19 13:36:33,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1550 to 1488. [2021-11-19 13:36:33,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1488 states, 1487 states have (on average 1.2945527908540686) internal successors, (1925), 1487 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states 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 13:36:33,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1488 states to 1488 states and 1925 transitions. [2021-11-19 13:36:33,914 INFO L78 Accepts]: Start accepts. Automaton has 1488 states and 1925 transitions. Word has length 131 [2021-11-19 13:36:33,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:36:33,915 INFO L470 AbstractCegarLoop]: Abstraction has 1488 states and 1925 transitions. [2021-11-19 13:36:33,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states 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 13:36:33,916 INFO L276 IsEmpty]: Start isEmpty. Operand 1488 states and 1925 transitions. [2021-11-19 13:36:33,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-19 13:36:33,919 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:36:33,919 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:36:33,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-19 13:36:33,920 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:36:33,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:36:33,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1247148985, now seen corresponding path program 1 times [2021-11-19 13:36:33,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:36:33,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891207079] [2021-11-19 13:36:33,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:33,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:36:33,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:34,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:36:34,003 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:36:34,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891207079] [2021-11-19 13:36:34,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891207079] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:36:34,005 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:36:34,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 13:36:34,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365245434] [2021-11-19 13:36:34,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:36:34,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:36:34,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:36:34,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:36:34,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:36:34,007 INFO L87 Difference]: Start difference. First operand 1488 states and 1925 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 13:36:34,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:36:34,464 INFO L93 Difference]: Finished difference Result 3959 states and 5190 transitions. [2021-11-19 13:36:34,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:36:34,465 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 13:36:34,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:36:34,482 INFO L225 Difference]: With dead ends: 3959 [2021-11-19 13:36:34,483 INFO L226 Difference]: Without dead ends: 2724 [2021-11-19 13:36:34,485 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 13:36:34,486 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 38 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:36:34,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 302 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:36:34,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2724 states. [2021-11-19 13:36:34,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2724 to 2614. [2021-11-19 13:36:34,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2614 states, 2613 states have (on average 1.2992728664370456) internal successors, (3395), 2613 states have internal predecessors, (3395), 0 states have call successors, (0), 0 states 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 13:36:34,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2614 states to 2614 states and 3395 transitions. [2021-11-19 13:36:34,932 INFO L78 Accepts]: Start accepts. Automaton has 2614 states and 3395 transitions. Word has length 134 [2021-11-19 13:36:34,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:36:34,933 INFO L470 AbstractCegarLoop]: Abstraction has 2614 states and 3395 transitions. [2021-11-19 13:36:34,933 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 13:36:34,933 INFO L276 IsEmpty]: Start isEmpty. Operand 2614 states and 3395 transitions. [2021-11-19 13:36:34,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-19 13:36:34,935 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:36:34,936 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:36:34,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-19 13:36:34,936 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:36:34,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:36:34,937 INFO L85 PathProgramCache]: Analyzing trace with hash 88155242, now seen corresponding path program 1 times [2021-11-19 13:36:34,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:36:34,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729548542] [2021-11-19 13:36:34,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:34,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:36:34,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:35,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:36:35,026 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:36:35,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729548542] [2021-11-19 13:36:35,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729548542] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:36:35,027 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:36:35,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 13:36:35,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530291207] [2021-11-19 13:36:35,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:36:35,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:36:35,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:36:35,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:36:35,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:36:35,029 INFO L87 Difference]: Start difference. First operand 2614 states and 3395 transitions. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:36:35,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:36:35,895 INFO L93 Difference]: Finished difference Result 7319 states and 9580 transitions. [2021-11-19 13:36:35,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:36:35,896 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 137 [2021-11-19 13:36:35,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:36:35,925 INFO L225 Difference]: With dead ends: 7319 [2021-11-19 13:36:35,925 INFO L226 Difference]: Without dead ends: 4970 [2021-11-19 13:36:35,929 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 13:36:35,930 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 33 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:36:35,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 295 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:36:35,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4970 states. [2021-11-19 13:36:36,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4970 to 4764. [2021-11-19 13:36:36,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4764 states, 4763 states have (on average 1.2985513331933656) internal successors, (6185), 4763 states have internal predecessors, (6185), 0 states have call successors, (0), 0 states 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 13:36:36,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4764 states to 4764 states and 6185 transitions. [2021-11-19 13:36:36,655 INFO L78 Accepts]: Start accepts. Automaton has 4764 states and 6185 transitions. Word has length 137 [2021-11-19 13:36:36,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:36:36,656 INFO L470 AbstractCegarLoop]: Abstraction has 4764 states and 6185 transitions. [2021-11-19 13:36:36,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:36:36,656 INFO L276 IsEmpty]: Start isEmpty. Operand 4764 states and 6185 transitions. [2021-11-19 13:36:36,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-19 13:36:36,658 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:36:36,658 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:36:36,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-19 13:36:36,658 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:36:36,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:36:36,659 INFO L85 PathProgramCache]: Analyzing trace with hash 570714560, now seen corresponding path program 1 times [2021-11-19 13:36:36,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:36:36,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488797373] [2021-11-19 13:36:36,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:36,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:36:36,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:36,772 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:36:36,772 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:36:36,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488797373] [2021-11-19 13:36:36,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488797373] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:36:36,773 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:36:36,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 13:36:36,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007617891] [2021-11-19 13:36:36,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:36:36,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:36:36,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:36:36,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:36:36,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:36:36,775 INFO L87 Difference]: Start difference. First operand 4764 states and 6185 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 13:36:38,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:36:38,402 INFO L93 Difference]: Finished difference Result 13749 states and 17927 transitions. [2021-11-19 13:36:38,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:36:38,403 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 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 140 [2021-11-19 13:36:38,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:36:38,458 INFO L225 Difference]: With dead ends: 13749 [2021-11-19 13:36:38,459 INFO L226 Difference]: Without dead ends: 9262 [2021-11-19 13:36:38,469 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 13:36:38,470 INFO L933 BasicCegarLoop]: 154 mSDtfsCounter, 29 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:36:38,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 297 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:36:38,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9262 states. [2021-11-19 13:36:40,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9262 to 8868. [2021-11-19 13:36:40,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8868 states, 8867 states have (on average 1.2940115033269426) internal successors, (11474), 8867 states have internal predecessors, (11474), 0 states have call successors, (0), 0 states 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 13:36:40,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8868 states to 8868 states and 11474 transitions. [2021-11-19 13:36:40,238 INFO L78 Accepts]: Start accepts. Automaton has 8868 states and 11474 transitions. Word has length 140 [2021-11-19 13:36:40,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:36:40,238 INFO L470 AbstractCegarLoop]: Abstraction has 8868 states and 11474 transitions. [2021-11-19 13:36:40,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 13:36:40,239 INFO L276 IsEmpty]: Start isEmpty. Operand 8868 states and 11474 transitions. [2021-11-19 13:36:40,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-19 13:36:40,241 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:36:40,241 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:36:40,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-19 13:36:40,242 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:36:40,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:36:40,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1549749247, now seen corresponding path program 1 times [2021-11-19 13:36:40,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:36:40,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793794870] [2021-11-19 13:36:40,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:40,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:36:40,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:40,314 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 13:36:40,315 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:36:40,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793794870] [2021-11-19 13:36:40,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793794870] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:36:40,315 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:36:40,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 13:36:40,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987148571] [2021-11-19 13:36:40,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:36:40,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:36:40,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:36:40,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:36:40,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:36:40,318 INFO L87 Difference]: Start difference. First operand 8868 states and 11474 transitions. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 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 13:36:41,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:36:41,610 INFO L93 Difference]: Finished difference Result 17498 states and 22677 transitions. [2021-11-19 13:36:41,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:36:41,610 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 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 145 [2021-11-19 13:36:41,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:36:41,648 INFO L225 Difference]: With dead ends: 17498 [2021-11-19 13:36:41,648 INFO L226 Difference]: Without dead ends: 8771 [2021-11-19 13:36:41,660 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 13:36:41,661 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 62 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:36:41,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 340 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:36:41,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8771 states. [2021-11-19 13:36:42,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8771 to 8216. [2021-11-19 13:36:42,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8216 states, 8215 states have (on average 1.2813146682897139) internal successors, (10526), 8215 states have internal predecessors, (10526), 0 states have call successors, (0), 0 states 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 13:36:42,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8216 states to 8216 states and 10526 transitions. [2021-11-19 13:36:42,621 INFO L78 Accepts]: Start accepts. Automaton has 8216 states and 10526 transitions. Word has length 145 [2021-11-19 13:36:42,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:36:42,622 INFO L470 AbstractCegarLoop]: Abstraction has 8216 states and 10526 transitions. [2021-11-19 13:36:42,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 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 13:36:42,622 INFO L276 IsEmpty]: Start isEmpty. Operand 8216 states and 10526 transitions. [2021-11-19 13:36:42,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-19 13:36:42,625 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:36:42,625 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:36:42,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-19 13:36:42,626 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:36:42,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:36:42,626 INFO L85 PathProgramCache]: Analyzing trace with hash 186931594, now seen corresponding path program 1 times [2021-11-19 13:36:42,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:36:42,627 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544268798] [2021-11-19 13:36:42,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:42,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:36:42,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:42,813 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 13:36:42,813 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:36:42,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544268798] [2021-11-19 13:36:42,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544268798] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:36:42,814 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:36:42,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 13:36:42,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256069213] [2021-11-19 13:36:42,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:36:42,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:36:42,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:36:42,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:36:42,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:36:42,816 INFO L87 Difference]: Start difference. First operand 8216 states and 10526 transitions. Second operand has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 6 states have internal predecessors, (156), 0 states have call successors, (0), 0 states 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 13:36:44,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:36:44,023 INFO L93 Difference]: Finished difference Result 16326 states and 20944 transitions. [2021-11-19 13:36:44,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:36:44,023 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 6 states have internal predecessors, (156), 0 states have call successors, (0), 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 165 [2021-11-19 13:36:44,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:36:44,047 INFO L225 Difference]: With dead ends: 16326 [2021-11-19 13:36:44,047 INFO L226 Difference]: Without dead ends: 8216 [2021-11-19 13:36:44,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:36:44,062 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 528 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 528 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:36:44,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [528 Valid, 155 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:36:44,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8216 states. [2021-11-19 13:36:45,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8216 to 8216. [2021-11-19 13:36:45,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8216 states, 8215 states have (on average 1.2617163724893488) internal successors, (10365), 8215 states have internal predecessors, (10365), 0 states have call successors, (0), 0 states 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 13:36:45,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8216 states to 8216 states and 10365 transitions. [2021-11-19 13:36:45,479 INFO L78 Accepts]: Start accepts. Automaton has 8216 states and 10365 transitions. Word has length 165 [2021-11-19 13:36:45,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:36:45,481 INFO L470 AbstractCegarLoop]: Abstraction has 8216 states and 10365 transitions. [2021-11-19 13:36:45,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 6 states have internal predecessors, (156), 0 states have call successors, (0), 0 states 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 13:36:45,483 INFO L276 IsEmpty]: Start isEmpty. Operand 8216 states and 10365 transitions. [2021-11-19 13:36:45,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-19 13:36:45,485 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:36:45,485 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:36:45,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-19 13:36:45,486 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:36:45,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:36:45,486 INFO L85 PathProgramCache]: Analyzing trace with hash -469782587, now seen corresponding path program 1 times [2021-11-19 13:36:45,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:36:45,487 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215877143] [2021-11-19 13:36:45,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:45,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:36:46,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:38:18,269 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:38:18,270 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:38:18,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215877143] [2021-11-19 13:38:18,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215877143] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 13:38:18,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033528631] [2021-11-19 13:38:18,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:38:18,272 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:38:18,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68900004-20b9-475b-a1b1-1a25b11c9282/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:38:18,273 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68900004-20b9-475b-a1b1-1a25b11c9282/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:38:18,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68900004-20b9-475b-a1b1-1a25b11c9282/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 13:38:19,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:38:19,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 760 conjuncts, 183 conjunts are in the unsatisfiable core [2021-11-19 13:38:19,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:43:58,275 WARN L227 SmtUtils]: Spent 1.25m on a formula simplification that was a NOOP. DAG size: 208 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)