./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/token_ring.11.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9726d47d-10a5-466d-9a89-57bb241092b5/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9726d47d-10a5-466d-9a89-57bb241092b5/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9726d47d-10a5-466d-9a89-57bb241092b5/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9726d47d-10a5-466d-9a89-57bb241092b5/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/token_ring.11.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9726d47d-10a5-466d-9a89-57bb241092b5/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9726d47d-10a5-466d-9a89-57bb241092b5/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c5f603027c62ff37561a520351662dbe2fd253b52e04e36028cb9a624978ef8e --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:18:11,937 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:18:11,940 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:18:11,995 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:18:11,996 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:18:11,997 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:18:12,001 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:18:12,004 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:18:12,007 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:18:12,008 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:18:12,009 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:18:12,012 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:18:12,013 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:18:12,021 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:18:12,022 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:18:12,033 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:18:12,036 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:18:12,037 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:18:12,039 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:18:12,041 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:18:12,043 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:18:12,044 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:18:12,046 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:18:12,047 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:18:12,050 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:18:12,051 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:18:12,051 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:18:12,052 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:18:12,052 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:18:12,054 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:18:12,054 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:18:12,055 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:18:12,056 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:18:12,056 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:18:12,058 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:18:12,058 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:18:12,058 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:18:12,059 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:18:12,059 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:18:12,060 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:18:12,060 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:18:12,061 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9726d47d-10a5-466d-9a89-57bb241092b5/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 20:18:12,087 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:18:12,088 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:18:12,088 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:18:12,088 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:18:12,089 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:18:12,089 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:18:12,089 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:18:12,089 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:18:12,090 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:18:12,090 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 20:18:12,090 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:18:12,090 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:18:12,090 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 20:18:12,091 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 20:18:12,091 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:18:12,091 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 20:18:12,091 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 20:18:12,091 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 20:18:12,092 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:18:12,092 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 20:18:12,092 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:18:12,093 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 20:18:12,093 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:18:12,093 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 20:18:12,093 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:18:12,093 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 20:18:12,093 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 20:18:12,094 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 20:18:12,094 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:18:12,094 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 20:18:12,094 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:18:12,094 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:18:12,095 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:18:12,095 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:18:12,095 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:18:12,095 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 20:18:12,095 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 20:18:12,096 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 20:18:12,096 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 20:18:12,096 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:18:12,096 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:18:12,096 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_9726d47d-10a5-466d-9a89-57bb241092b5/bin/utaipan-eEHZpOm5b7/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9726d47d-10a5-466d-9a89-57bb241092b5/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c5f603027c62ff37561a520351662dbe2fd253b52e04e36028cb9a624978ef8e [2021-11-25 20:18:12,330 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:18:12,362 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:18:12,365 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:18:12,367 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:18:12,367 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:18:12,369 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9726d47d-10a5-466d-9a89-57bb241092b5/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/systemc/token_ring.11.cil-2.c [2021-11-25 20:18:12,439 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9726d47d-10a5-466d-9a89-57bb241092b5/bin/utaipan-eEHZpOm5b7/data/8a87e52ed/bbf905b8c93146fab7a660b5e3bb4eb4/FLAGe46d060b3 [2021-11-25 20:18:12,967 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:18:12,967 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9726d47d-10a5-466d-9a89-57bb241092b5/sv-benchmarks/c/systemc/token_ring.11.cil-2.c [2021-11-25 20:18:12,983 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9726d47d-10a5-466d-9a89-57bb241092b5/bin/utaipan-eEHZpOm5b7/data/8a87e52ed/bbf905b8c93146fab7a660b5e3bb4eb4/FLAGe46d060b3 [2021-11-25 20:18:13,407 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9726d47d-10a5-466d-9a89-57bb241092b5/bin/utaipan-eEHZpOm5b7/data/8a87e52ed/bbf905b8c93146fab7a660b5e3bb4eb4 [2021-11-25 20:18:13,410 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:18:13,423 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:18:13,437 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:18:13,437 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:18:13,440 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:18:13,441 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:18:13" (1/1) ... [2021-11-25 20:18:13,441 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@743333ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:18:13, skipping insertion in model container [2021-11-25 20:18:13,442 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:18:13" (1/1) ... [2021-11-25 20:18:13,449 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:18:13,520 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:18:13,640 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_9726d47d-10a5-466d-9a89-57bb241092b5/sv-benchmarks/c/systemc/token_ring.11.cil-2.c[671,684] [2021-11-25 20:18:13,765 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:18:13,775 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:18:13,786 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_9726d47d-10a5-466d-9a89-57bb241092b5/sv-benchmarks/c/systemc/token_ring.11.cil-2.c[671,684] [2021-11-25 20:18:13,869 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:18:13,889 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:18:13,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:18:13 WrapperNode [2021-11-25 20:18:13,890 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:18:13,899 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:18:13,899 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:18:13,900 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:18:13,908 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:18:13" (1/1) ... [2021-11-25 20:18:13,923 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:18:13" (1/1) ... [2021-11-25 20:18:13,976 INFO L137 Inliner]: procedures = 50, calls = 64, calls flagged for inlining = 34, calls inlined = 34, statements flattened = 795 [2021-11-25 20:18:13,976 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:18:13,977 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:18:13,977 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:18:13,977 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:18:13,986 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:18:13" (1/1) ... [2021-11-25 20:18:13,986 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:18:13" (1/1) ... [2021-11-25 20:18:13,992 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:18:13" (1/1) ... [2021-11-25 20:18:13,992 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:18:13" (1/1) ... [2021-11-25 20:18:14,007 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:18:13" (1/1) ... [2021-11-25 20:18:14,023 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:18:13" (1/1) ... [2021-11-25 20:18:14,026 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:18:13" (1/1) ... [2021-11-25 20:18:14,032 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:18:14,033 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:18:14,033 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:18:14,033 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:18:14,034 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:18:13" (1/1) ... [2021-11-25 20:18:14,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:18:14,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9726d47d-10a5-466d-9a89-57bb241092b5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:18:14,065 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9726d47d-10a5-466d-9a89-57bb241092b5/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:18:14,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9726d47d-10a5-466d-9a89-57bb241092b5/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:18:14,121 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:18:14,121 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-11-25 20:18:14,122 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-11-25 20:18:14,122 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-25 20:18:14,122 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-25 20:18:14,122 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-11-25 20:18:14,123 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-11-25 20:18:14,123 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-11-25 20:18:14,123 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-11-25 20:18:14,123 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-11-25 20:18:14,124 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-11-25 20:18:14,124 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-11-25 20:18:14,124 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-11-25 20:18:14,124 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 20:18:14,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:18:14,124 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:18:14,310 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:18:14,312 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:18:15,007 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:18:15,476 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:18:15,476 INFO L301 CfgBuilder]: Removed 14 assume(true) statements. [2021-11-25 20:18:15,480 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:18:15 BoogieIcfgContainer [2021-11-25 20:18:15,480 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:18:15,484 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:18:15,484 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:18:15,487 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:18:15,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:18:13" (1/3) ... [2021-11-25 20:18:15,488 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67bdb362 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:18:15, skipping insertion in model container [2021-11-25 20:18:15,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:18:13" (2/3) ... [2021-11-25 20:18:15,489 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67bdb362 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:18:15, skipping insertion in model container [2021-11-25 20:18:15,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:18:15" (3/3) ... [2021-11-25 20:18:15,490 INFO L111 eAbstractionObserver]: Analyzing ICFG token_ring.11.cil-2.c [2021-11-25 20:18:15,498 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:18:15,499 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 20:18:15,564 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:18:15,576 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 20:18:15,576 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 20:18:15,618 INFO L276 IsEmpty]: Start isEmpty. Operand has 177 states, 144 states have (on average 1.5555555555555556) internal successors, (224), 146 states have internal predecessors, (224), 25 states have call successors, (25), 6 states have call predecessors, (25), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-11-25 20:18:15,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-25 20:18:15,630 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:18:15,631 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] [2021-11-25 20:18:15,631 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:18:15,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:18:15,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1290656416, now seen corresponding path program 1 times [2021-11-25 20:18:15,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:18:15,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973700308] [2021-11-25 20:18:15,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:18:15,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:18:15,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:18:16,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:18:16,043 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:18:16,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973700308] [2021-11-25 20:18:16,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973700308] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:18:16,045 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:18:16,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:18:16,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465397198] [2021-11-25 20:18:16,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:18:16,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:18:16,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:18:16,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:18:16,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:18:16,107 INFO L87 Difference]: Start difference. First operand has 177 states, 144 states have (on average 1.5555555555555556) internal successors, (224), 146 states have internal predecessors, (224), 25 states have call successors, (25), 6 states have call predecessors, (25), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 20:18:16,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:18:16,638 INFO L93 Difference]: Finished difference Result 515 states and 813 transitions. [2021-11-25 20:18:16,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:18:16,641 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 63 [2021-11-25 20:18:16,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:18:16,655 INFO L225 Difference]: With dead ends: 515 [2021-11-25 20:18:16,655 INFO L226 Difference]: Without dead ends: 339 [2021-11-25 20:18:16,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:18:16,665 INFO L933 BasicCegarLoop]: 424 mSDtfsCounter, 479 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:18:16,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [479 Valid, 754 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 20:18:16,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-11-25 20:18:16,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 338. [2021-11-25 20:18:16,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 279 states have (on average 1.5197132616487454) internal successors, (424), 281 states have internal predecessors, (424), 46 states have call successors, (46), 12 states have call predecessors, (46), 12 states have return successors, (46), 45 states have call predecessors, (46), 46 states have call successors, (46) [2021-11-25 20:18:16,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 516 transitions. [2021-11-25 20:18:16,759 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 516 transitions. Word has length 63 [2021-11-25 20:18:16,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:18:16,760 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 516 transitions. [2021-11-25 20:18:16,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 20:18:16,761 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 516 transitions. [2021-11-25 20:18:16,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-25 20:18:16,771 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:18:16,771 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-25 20:18:16,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 20:18:16,772 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:18:16,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:18:16,773 INFO L85 PathProgramCache]: Analyzing trace with hash 523458760, now seen corresponding path program 1 times [2021-11-25 20:18:16,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:18:16,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719574170] [2021-11-25 20:18:16,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:18:16,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:18:16,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:18:17,013 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-25 20:18:17,014 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:18:17,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719574170] [2021-11-25 20:18:17,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719574170] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:18:17,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222456243] [2021-11-25 20:18:17,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:18:17,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:18:17,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9726d47d-10a5-466d-9a89-57bb241092b5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:18:17,018 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9726d47d-10a5-466d-9a89-57bb241092b5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:18:17,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9726d47d-10a5-466d-9a89-57bb241092b5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 20:18:17,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:18:17,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 922 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 20:18:17,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:18:17,588 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-25 20:18:17,589 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:18:17,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222456243] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:18:17,596 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:18:17,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-25 20:18:17,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385997199] [2021-11-25 20:18:17,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:18:17,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:18:17,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:18:17,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:18:17,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:18:17,601 INFO L87 Difference]: Start difference. First operand 338 states and 516 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 20:18:17,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:18:17,760 INFO L93 Difference]: Finished difference Result 997 states and 1549 transitions. [2021-11-25 20:18:17,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:18:17,761 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 128 [2021-11-25 20:18:17,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:18:17,772 INFO L225 Difference]: With dead ends: 997 [2021-11-25 20:18:17,772 INFO L226 Difference]: Without dead ends: 664 [2021-11-25 20:18:17,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:18:17,779 INFO L933 BasicCegarLoop]: 271 mSDtfsCounter, 223 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:18:17,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 482 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:18:17,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2021-11-25 20:18:17,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 660. [2021-11-25 20:18:17,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 549 states have (on average 1.517304189435337) internal successors, (833), 552 states have internal predecessors, (833), 86 states have call successors, (86), 24 states have call predecessors, (86), 24 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-25 20:18:17,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 1005 transitions. [2021-11-25 20:18:17,860 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 1005 transitions. Word has length 128 [2021-11-25 20:18:17,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:18:17,860 INFO L470 AbstractCegarLoop]: Abstraction has 660 states and 1005 transitions. [2021-11-25 20:18:17,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 20:18:17,861 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 1005 transitions. [2021-11-25 20:18:17,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-25 20:18:17,872 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:18:17,872 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-25 20:18:17,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9726d47d-10a5-466d-9a89-57bb241092b5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 20:18:18,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9726d47d-10a5-466d-9a89-57bb241092b5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:18:18,095 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:18:18,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:18:18,096 INFO L85 PathProgramCache]: Analyzing trace with hash 487871370, now seen corresponding path program 1 times [2021-11-25 20:18:18,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:18:18,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699654069] [2021-11-25 20:18:18,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:18:18,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:18:18,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:18:18,232 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-25 20:18:18,233 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:18:18,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699654069] [2021-11-25 20:18:18,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699654069] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:18:18,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888703227] [2021-11-25 20:18:18,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:18:18,234 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:18:18,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9726d47d-10a5-466d-9a89-57bb241092b5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:18:18,237 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9726d47d-10a5-466d-9a89-57bb241092b5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:18:18,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9726d47d-10a5-466d-9a89-57bb241092b5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 20:18:18,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:18:18,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 916 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 20:18:18,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:18:18,655 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-25 20:18:18,655 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:18:18,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888703227] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:18:18,656 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:18:18,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-25 20:18:18,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451402275] [2021-11-25 20:18:18,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:18:18,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:18:18,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:18:18,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:18:18,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:18:18,659 INFO L87 Difference]: Start difference. First operand 660 states and 1005 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 20:18:18,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:18:18,851 INFO L93 Difference]: Finished difference Result 1957 states and 3032 transitions. [2021-11-25 20:18:18,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:18:18,852 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 128 [2021-11-25 20:18:18,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:18:18,864 INFO L225 Difference]: With dead ends: 1957 [2021-11-25 20:18:18,865 INFO L226 Difference]: Without dead ends: 1302 [2021-11-25 20:18:18,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:18:18,871 INFO L933 BasicCegarLoop]: 270 mSDtfsCounter, 235 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:18:18,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 481 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:18:18,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1302 states. [2021-11-25 20:18:18,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1302 to 1296. [2021-11-25 20:18:18,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1296 states, 1083 states have (on average 1.5133887349953832) internal successors, (1639), 1088 states have internal predecessors, (1639), 164 states have call successors, (164), 48 states have call predecessors, (164), 48 states have return successors, (164), 160 states have call predecessors, (164), 164 states have call successors, (164) [2021-11-25 20:18:19,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1296 states to 1296 states and 1967 transitions. [2021-11-25 20:18:19,002 INFO L78 Accepts]: Start accepts. Automaton has 1296 states and 1967 transitions. Word has length 128 [2021-11-25 20:18:19,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:18:19,002 INFO L470 AbstractCegarLoop]: Abstraction has 1296 states and 1967 transitions. [2021-11-25 20:18:19,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 20:18:19,003 INFO L276 IsEmpty]: Start isEmpty. Operand 1296 states and 1967 transitions. [2021-11-25 20:18:19,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-25 20:18:19,009 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:18:19,009 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-25 20:18:19,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9726d47d-10a5-466d-9a89-57bb241092b5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 20:18:19,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9726d47d-10a5-466d-9a89-57bb241092b5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:18:19,218 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:18:19,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:18:19,218 INFO L85 PathProgramCache]: Analyzing trace with hash -23512244, now seen corresponding path program 1 times [2021-11-25 20:18:19,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:18:19,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53023089] [2021-11-25 20:18:19,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:18:19,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:18:19,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:18:19,301 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-25 20:18:19,302 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:18:19,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53023089] [2021-11-25 20:18:19,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53023089] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:18:19,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127023595] [2021-11-25 20:18:19,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:18:19,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:18:19,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9726d47d-10a5-466d-9a89-57bb241092b5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:18:19,303 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9726d47d-10a5-466d-9a89-57bb241092b5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:18:19,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9726d47d-10a5-466d-9a89-57bb241092b5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 20:18:19,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:18:19,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 910 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 20:18:19,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:18:19,752 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-25 20:18:19,752 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:18:19,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127023595] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:18:19,753 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:18:19,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-25 20:18:19,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796942915] [2021-11-25 20:18:19,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:18:19,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:18:19,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:18:19,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:18:19,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:18:19,755 INFO L87 Difference]: Start difference. First operand 1296 states and 1967 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 20:18:19,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:18:19,958 INFO L93 Difference]: Finished difference Result 3853 states and 5948 transitions. [2021-11-25 20:18:19,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:18:19,959 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 128 [2021-11-25 20:18:19,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:18:19,977 INFO L225 Difference]: With dead ends: 3853 [2021-11-25 20:18:19,977 INFO L226 Difference]: Without dead ends: 2562 [2021-11-25 20:18:19,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:18:19,985 INFO L933 BasicCegarLoop]: 258 mSDtfsCounter, 244 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:18:19,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 469 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:18:19,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2562 states. [2021-11-25 20:18:20,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2562 to 2552. [2021-11-25 20:18:20,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2552 states, 2139 states have (on average 1.5086489013557738) internal successors, (3227), 2148 states have internal predecessors, (3227), 316 states have call successors, (316), 96 states have call predecessors, (316), 96 states have return successors, (316), 308 states have call predecessors, (316), 316 states have call successors, (316) [2021-11-25 20:18:20,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2552 states to 2552 states and 3859 transitions. [2021-11-25 20:18:20,119 INFO L78 Accepts]: Start accepts. Automaton has 2552 states and 3859 transitions. Word has length 128 [2021-11-25 20:18:20,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:18:20,119 INFO L470 AbstractCegarLoop]: Abstraction has 2552 states and 3859 transitions. [2021-11-25 20:18:20,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 20:18:20,120 INFO L276 IsEmpty]: Start isEmpty. Operand 2552 states and 3859 transitions. [2021-11-25 20:18:20,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-25 20:18:20,127 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:18:20,128 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-25 20:18:20,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9726d47d-10a5-466d-9a89-57bb241092b5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 20:18:20,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9726d47d-10a5-466d-9a89-57bb241092b5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:18:20,355 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:18:20,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:18:20,355 INFO L85 PathProgramCache]: Analyzing trace with hash -162533942, now seen corresponding path program 1 times [2021-11-25 20:18:20,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:18:20,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061373842] [2021-11-25 20:18:20,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:18:20,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:18:20,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:18:20,450 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-25 20:18:20,450 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:18:20,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061373842] [2021-11-25 20:18:20,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061373842] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:18:20,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485865039] [2021-11-25 20:18:20,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:18:20,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:18:20,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9726d47d-10a5-466d-9a89-57bb241092b5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:18:20,452 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9726d47d-10a5-466d-9a89-57bb241092b5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:18:20,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9726d47d-10a5-466d-9a89-57bb241092b5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 20:18:20,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:18:20,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 904 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 20:18:20,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:18:20,821 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-25 20:18:20,821 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:18:20,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485865039] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:18:20,821 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:18:20,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-25 20:18:20,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407759442] [2021-11-25 20:18:20,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:18:20,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:18:20,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:18:20,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:18:20,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:18:20,823 INFO L87 Difference]: Start difference. First operand 2552 states and 3859 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 20:18:21,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:18:21,147 INFO L93 Difference]: Finished difference Result 7597 states and 11680 transitions. [2021-11-25 20:18:21,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:18:21,148 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 128 [2021-11-25 20:18:21,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:18:21,184 INFO L225 Difference]: With dead ends: 7597 [2021-11-25 20:18:21,184 INFO L226 Difference]: Without dead ends: 5050 [2021-11-25 20:18:21,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:18:21,199 INFO L933 BasicCegarLoop]: 268 mSDtfsCounter, 241 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:18:21,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 479 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:18:21,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5050 states. [2021-11-25 20:18:21,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5050 to 5032. [2021-11-25 20:18:21,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5032 states, 4227 states have (on average 1.5034303288384196) internal successors, (6355), 4244 states have internal predecessors, (6355), 612 states have call successors, (612), 192 states have call predecessors, (612), 192 states have return successors, (612), 596 states have call predecessors, (612), 612 states have call successors, (612) [2021-11-25 20:18:21,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5032 states to 5032 states and 7579 transitions. [2021-11-25 20:18:21,527 INFO L78 Accepts]: Start accepts. Automaton has 5032 states and 7579 transitions. Word has length 128 [2021-11-25 20:18:21,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:18:21,527 INFO L470 AbstractCegarLoop]: Abstraction has 5032 states and 7579 transitions. [2021-11-25 20:18:21,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 20:18:21,528 INFO L276 IsEmpty]: Start isEmpty. Operand 5032 states and 7579 transitions. [2021-11-25 20:18:21,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-25 20:18:21,541 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:18:21,541 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-25 20:18:21,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9726d47d-10a5-466d-9a89-57bb241092b5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 20:18:21,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9726d47d-10a5-466d-9a89-57bb241092b5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:18:21,755 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:18:21,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:18:21,755 INFO L85 PathProgramCache]: Analyzing trace with hash 2059697164, now seen corresponding path program 1 times [2021-11-25 20:18:21,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:18:21,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224133386] [2021-11-25 20:18:21,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:18:21,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:18:21,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:18:21,832 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-25 20:18:21,833 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:18:21,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224133386] [2021-11-25 20:18:21,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224133386] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:18:21,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252636969] [2021-11-25 20:18:21,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:18:21,833 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:18:21,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9726d47d-10a5-466d-9a89-57bb241092b5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:18:21,834 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9726d47d-10a5-466d-9a89-57bb241092b5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:18:21,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9726d47d-10a5-466d-9a89-57bb241092b5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 20:18:22,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:18:22,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 898 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 20:18:22,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:18:22,268 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-25 20:18:22,269 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:18:22,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252636969] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:18:22,269 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:18:22,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-25 20:18:22,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032972046] [2021-11-25 20:18:22,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:18:22,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:18:22,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:18:22,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:18:22,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:18:22,271 INFO L87 Difference]: Start difference. First operand 5032 states and 7579 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 20:18:22,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:18:22,756 INFO L93 Difference]: Finished difference Result 14989 states and 22944 transitions. [2021-11-25 20:18:22,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:18:22,756 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 128 [2021-11-25 20:18:22,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:18:22,825 INFO L225 Difference]: With dead ends: 14989 [2021-11-25 20:18:22,825 INFO L226 Difference]: Without dead ends: 9962 [2021-11-25 20:18:22,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:18:22,846 INFO L933 BasicCegarLoop]: 240 mSDtfsCounter, 229 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:18:22,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 451 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:18:22,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9962 states. [2021-11-25 20:18:23,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9962 to 9928. [2021-11-25 20:18:23,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9928 states, 8355 states have (on average 1.4979054458408139) internal successors, (12515), 8388 states have internal predecessors, (12515), 1188 states have call successors, (1188), 384 states have call predecessors, (1188), 384 states have return successors, (1188), 1156 states have call predecessors, (1188), 1188 states have call successors, (1188) [2021-11-25 20:18:23,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9928 states to 9928 states and 14891 transitions. [2021-11-25 20:18:23,483 INFO L78 Accepts]: Start accepts. Automaton has 9928 states and 14891 transitions. Word has length 128 [2021-11-25 20:18:23,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:18:23,485 INFO L470 AbstractCegarLoop]: Abstraction has 9928 states and 14891 transitions. [2021-11-25 20:18:23,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 20:18:23,487 INFO L276 IsEmpty]: Start isEmpty. Operand 9928 states and 14891 transitions. [2021-11-25 20:18:23,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-25 20:18:23,513 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:18:23,514 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-25 20:18:23,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9726d47d-10a5-466d-9a89-57bb241092b5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 20:18:23,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9726d47d-10a5-466d-9a89-57bb241092b5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-25 20:18:23,735 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:18:23,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:18:23,735 INFO L85 PathProgramCache]: Analyzing trace with hash 2096815438, now seen corresponding path program 1 times [2021-11-25 20:18:23,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:18:23,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010589977] [2021-11-25 20:18:23,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:18:23,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:18:23,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:18:23,827 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-25 20:18:23,828 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:18:23,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010589977] [2021-11-25 20:18:23,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010589977] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:18:23,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247583885] [2021-11-25 20:18:23,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:18:23,829 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:18:23,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9726d47d-10a5-466d-9a89-57bb241092b5/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:18:23,831 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9726d47d-10a5-466d-9a89-57bb241092b5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:18:23,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9726d47d-10a5-466d-9a89-57bb241092b5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 20:18:24,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:18:24,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 892 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 20:18:24,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:18:24,286 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 20:18:24,286 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:18:24,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247583885] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:18:24,287 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:18:24,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 4 [2021-11-25 20:18:24,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200739285] [2021-11-25 20:18:24,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:18:24,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:18:24,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:18:24,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:18:24,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:18:24,289 INFO L87 Difference]: Start difference. First operand 9928 states and 14891 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 20:18:25,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:18:25,112 INFO L93 Difference]: Finished difference Result 29581 states and 45072 transitions. [2021-11-25 20:18:25,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:18:25,113 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 128 [2021-11-25 20:18:25,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:18:25,294 INFO L225 Difference]: With dead ends: 29581 [2021-11-25 20:18:25,294 INFO L226 Difference]: Without dead ends: 19658 [2021-11-25 20:18:25,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:18:25,332 INFO L933 BasicCegarLoop]: 240 mSDtfsCounter, 217 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:18:25,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 451 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:18:25,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19658 states. [2021-11-25 20:18:26,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19658 to 19592. [2021-11-25 20:18:26,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19592 states, 16515 states have (on average 1.4921586436572813) internal successors, (24643), 16580 states have internal predecessors, (24643), 2308 states have call successors, (2308), 768 states have call predecessors, (2308), 768 states have return successors, (2308), 2244 states have call predecessors, (2308), 2308 states have call successors, (2308) [2021-11-25 20:18:26,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19592 states to 19592 states and 29259 transitions. [2021-11-25 20:18:26,420 INFO L78 Accepts]: Start accepts. Automaton has 19592 states and 29259 transitions. Word has length 128 [2021-11-25 20:18:26,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:18:26,421 INFO L470 AbstractCegarLoop]: Abstraction has 19592 states and 29259 transitions. [2021-11-25 20:18:26,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 20:18:26,422 INFO L276 IsEmpty]: Start isEmpty. Operand 19592 states and 29259 transitions. [2021-11-25 20:18:26,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-25 20:18:26,466 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:18:26,466 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-25 20:18:26,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9726d47d-10a5-466d-9a89-57bb241092b5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 20:18:26,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9726d47d-10a5-466d-9a89-57bb241092b5/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:18:26,691 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:18:26,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:18:26,691 INFO L85 PathProgramCache]: Analyzing trace with hash -891842160, now seen corresponding path program 1 times [2021-11-25 20:18:26,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:18:26,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283205477] [2021-11-25 20:18:26,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:18:26,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:18:26,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:18:26,858 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-25 20:18:26,859 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:18:26,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283205477] [2021-11-25 20:18:26,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283205477] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:18:26,859 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:18:26,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 20:18:26,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627828609] [2021-11-25 20:18:26,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:18:26,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:18:26,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:18:26,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:18:26,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:18:26,865 INFO L87 Difference]: Start difference. First operand 19592 states and 29259 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-25 20:18:29,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:18:29,146 INFO L93 Difference]: Finished difference Result 63500 states and 95310 transitions. [2021-11-25 20:18:29,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 20:18:29,147 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 128 [2021-11-25 20:18:29,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:18:29,404 INFO L225 Difference]: With dead ends: 63500 [2021-11-25 20:18:29,404 INFO L226 Difference]: Without dead ends: 43914 [2021-11-25 20:18:29,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-25 20:18:29,469 INFO L933 BasicCegarLoop]: 247 mSDtfsCounter, 864 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 884 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:18:29,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [884 Valid, 653 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 20:18:29,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43914 states. [2021-11-25 20:18:31,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43914 to 38408. [2021-11-25 20:18:31,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38408 states, 32387 states have (on average 1.4861209744650632) internal successors, (48131), 32516 states have internal predecessors, (48131), 4484 states have call successors, (4484), 1536 states have call predecessors, (4484), 1536 states have return successors, (4484), 4356 states have call predecessors, (4484), 4484 states have call successors, (4484) [2021-11-25 20:18:31,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38408 states to 38408 states and 57099 transitions. [2021-11-25 20:18:31,919 INFO L78 Accepts]: Start accepts. Automaton has 38408 states and 57099 transitions. Word has length 128 [2021-11-25 20:18:31,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:18:31,919 INFO L470 AbstractCegarLoop]: Abstraction has 38408 states and 57099 transitions. [2021-11-25 20:18:31,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-25 20:18:31,920 INFO L276 IsEmpty]: Start isEmpty. Operand 38408 states and 57099 transitions. [2021-11-25 20:18:31,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-25 20:18:31,996 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:18:31,996 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-25 20:18:31,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 20:18:31,996 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:18:31,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:18:31,997 INFO L85 PathProgramCache]: Analyzing trace with hash -617583796, now seen corresponding path program 1 times [2021-11-25 20:18:31,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:18:31,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462861861] [2021-11-25 20:18:31,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:18:31,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:18:32,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:18:32,140 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-25 20:18:32,140 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:18:32,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462861861] [2021-11-25 20:18:32,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462861861] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:18:32,141 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:18:32,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 20:18:32,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106202584] [2021-11-25 20:18:32,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:18:32,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:18:32,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:18:32,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:18:32,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:18:32,143 INFO L87 Difference]: Start difference. First operand 38408 states and 57099 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-25 20:18:35,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:18:35,821 INFO L93 Difference]: Finished difference Result 134156 states and 199310 transitions. [2021-11-25 20:18:35,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 20:18:35,821 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 129 [2021-11-25 20:18:35,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:18:36,290 INFO L225 Difference]: With dead ends: 134156 [2021-11-25 20:18:36,290 INFO L226 Difference]: Without dead ends: 95754 [2021-11-25 20:18:36,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-25 20:18:36,382 INFO L933 BasicCegarLoop]: 242 mSDtfsCounter, 982 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1002 SdHoareTripleChecker+Valid, 790 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 20:18:36,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1002 Valid, 790 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 20:18:36,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95754 states. [2021-11-25 20:18:40,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95754 to 75272. [2021-11-25 20:18:40,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75272 states, 63491 states have (on average 1.4798160369186184) internal successors, (93955), 63748 states have internal predecessors, (93955), 8708 states have call successors, (8708), 3072 states have call predecessors, (8708), 3072 states have return successors, (8708), 8452 states have call predecessors, (8708), 8708 states have call successors, (8708) [2021-11-25 20:18:40,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75272 states to 75272 states and 111371 transitions. [2021-11-25 20:18:40,549 INFO L78 Accepts]: Start accepts. Automaton has 75272 states and 111371 transitions. Word has length 129 [2021-11-25 20:18:40,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:18:40,550 INFO L470 AbstractCegarLoop]: Abstraction has 75272 states and 111371 transitions. [2021-11-25 20:18:40,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-25 20:18:40,551 INFO L276 IsEmpty]: Start isEmpty. Operand 75272 states and 111371 transitions. [2021-11-25 20:18:40,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-25 20:18:40,728 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:18:40,728 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-25 20:18:40,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 20:18:40,729 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:18:40,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:18:40,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1707933588, now seen corresponding path program 1 times [2021-11-25 20:18:40,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:18:40,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043570584] [2021-11-25 20:18:40,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:18:40,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:18:40,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:18:40,878 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-25 20:18:40,879 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:18:40,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043570584] [2021-11-25 20:18:40,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043570584] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:18:40,879 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:18:40,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 20:18:40,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7460461] [2021-11-25 20:18:40,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:18:40,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:18:40,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:18:40,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:18:40,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:18:40,883 INFO L87 Difference]: Start difference. First operand 75272 states and 111371 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-25 20:18:46,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:18:46,327 INFO L93 Difference]: Finished difference Result 200204 states and 297485 transitions. [2021-11-25 20:18:46,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 20:18:46,328 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 130 [2021-11-25 20:18:46,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:18:46,956 INFO L225 Difference]: With dead ends: 200204 [2021-11-25 20:18:46,957 INFO L226 Difference]: Without dead ends: 124938 [2021-11-25 20:18:47,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-25 20:18:47,150 INFO L933 BasicCegarLoop]: 235 mSDtfsCounter, 814 mSDsluCounter, 718 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 820 SdHoareTripleChecker+Valid, 836 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:18:47,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [820 Valid, 836 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 20:18:47,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124938 states. [2021-11-25 20:18:51,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124938 to 111880. [2021-11-25 20:18:51,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111880 states, 94339 states have (on average 1.4748831342286859) internal successors, (139139), 94724 states have internal predecessors, (139139), 12932 states have call successors, (12932), 4608 states have call predecessors, (12932), 4608 states have return successors, (12932), 12548 states have call predecessors, (12932), 12932 states have call successors, (12932) [2021-11-25 20:18:52,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111880 states to 111880 states and 165003 transitions. [2021-11-25 20:18:52,848 INFO L78 Accepts]: Start accepts. Automaton has 111880 states and 165003 transitions. Word has length 130 [2021-11-25 20:18:52,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:18:52,849 INFO L470 AbstractCegarLoop]: Abstraction has 111880 states and 165003 transitions. [2021-11-25 20:18:52,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-25 20:18:52,850 INFO L276 IsEmpty]: Start isEmpty. Operand 111880 states and 165003 transitions. [2021-11-25 20:18:53,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-25 20:18:53,016 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:18:53,017 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-25 20:18:53,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-25 20:18:53,017 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:18:53,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:18:53,018 INFO L85 PathProgramCache]: Analyzing trace with hash -741960372, now seen corresponding path program 1 times [2021-11-25 20:18:53,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:18:53,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668753193] [2021-11-25 20:18:53,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:18:53,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:18:53,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:18:53,161 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-25 20:18:53,161 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:18:53,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668753193] [2021-11-25 20:18:53,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668753193] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:18:53,162 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:18:53,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 20:18:53,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203323380] [2021-11-25 20:18:53,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:18:53,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:18:53,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:18:53,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:18:53,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:18:53,164 INFO L87 Difference]: Start difference. First operand 111880 states and 165003 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-25 20:18:59,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:18:59,873 INFO L93 Difference]: Finished difference Result 278156 states and 410189 transitions. [2021-11-25 20:18:59,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:18:59,873 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 131 [2021-11-25 20:18:59,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:19:00,934 INFO L225 Difference]: With dead ends: 278156 [2021-11-25 20:19:00,934 INFO L226 Difference]: Without dead ends: 166282 [2021-11-25 20:19:01,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-25 20:19:01,321 INFO L933 BasicCegarLoop]: 221 mSDtfsCounter, 772 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 792 SdHoareTripleChecker+Valid, 667 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:19:01,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [792 Valid, 667 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 20:19:01,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166282 states.