./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.06.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.06.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P --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 a9f893ab935631e26843412fbbbf983c2aeac51b5ea91d56e5f6804258a66568 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:29:04,307 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:29:04,310 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:29:04,376 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:29:04,377 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:29:04,382 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:29:04,384 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:29:04,388 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:29:04,391 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:29:04,399 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:29:04,400 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:29:04,401 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:29:04,402 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:29:04,405 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:29:04,407 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:29:04,412 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:29:04,414 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:29:04,415 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:29:04,420 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:29:04,423 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:29:04,430 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:29:04,431 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:29:04,434 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:29:04,436 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:29:04,443 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:29:04,443 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:29:04,444 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:29:04,446 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:29:04,447 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:29:04,448 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:29:04,448 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:29:04,449 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:29:04,450 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:29:04,451 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:29:04,452 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:29:04,452 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:29:04,453 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:29:04,453 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:29:04,454 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:29:04,454 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:29:04,455 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:29:04,456 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 01:29:04,482 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:29:04,485 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:29:04,485 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:29:04,485 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:29:04,486 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:29:04,490 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:29:04,490 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:29:04,491 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:29:04,491 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:29:04,491 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:29:04,491 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:29:04,492 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:29:04,492 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:29:04,492 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:29:04,492 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:29:04,493 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:29:04,493 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:29:04,493 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:29:04,494 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:29:04,496 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:29:04,496 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:29:04,496 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:29:04,497 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:29:04,497 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:29:04,497 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:29:04,497 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:29:04,497 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:29:04,499 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:29:04,500 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:29:04,500 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:29:04,500 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:29:04,501 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:29:04,501 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:29:04,501 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:29:04,501 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:29:04,501 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:29:04,502 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:29:04,502 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:29:04,502 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:29:04,502 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:29:04,503 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:29:04,503 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_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a9f893ab935631e26843412fbbbf983c2aeac51b5ea91d56e5f6804258a66568 [2021-11-21 01:29:04,785 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:29:04,808 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:29:04,811 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:29:04,813 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:29:04,814 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:29:04,815 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.06.cil-1.c [2021-11-21 01:29:04,889 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P/data/2385cdc90/4524ecaf02004f51b1e8578f04fb80a2/FLAG240df6650 [2021-11-21 01:29:06,114 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:29:06,116 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/sv-benchmarks/c/combinations/Problem05_label45+token_ring.06.cil-1.c [2021-11-21 01:29:06,175 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P/data/2385cdc90/4524ecaf02004f51b1e8578f04fb80a2/FLAG240df6650 [2021-11-21 01:29:06,243 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P/data/2385cdc90/4524ecaf02004f51b1e8578f04fb80a2 [2021-11-21 01:29:06,247 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:29:06,250 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:29:06,251 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:29:06,252 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:29:06,255 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:29:06,256 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:29:06" (1/1) ... [2021-11-21 01:29:06,258 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76c88b42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:29:06, skipping insertion in model container [2021-11-21 01:29:06,258 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:29:06" (1/1) ... [2021-11-21 01:29:06,265 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:29:06,505 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:29:08,833 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_e039fd5e-b0e6-40a5-842e-453a98f95068/sv-benchmarks/c/combinations/Problem05_label45+token_ring.06.cil-1.c[380323,380336] [2021-11-21 01:29:08,873 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_e039fd5e-b0e6-40a5-842e-453a98f95068/sv-benchmarks/c/combinations/Problem05_label45+token_ring.06.cil-1.c[383339,383352] [2021-11-21 01:29:09,169 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:29:09,180 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:29:10,685 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_e039fd5e-b0e6-40a5-842e-453a98f95068/sv-benchmarks/c/combinations/Problem05_label45+token_ring.06.cil-1.c[380323,380336] [2021-11-21 01:29:10,703 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_e039fd5e-b0e6-40a5-842e-453a98f95068/sv-benchmarks/c/combinations/Problem05_label45+token_ring.06.cil-1.c[383339,383352] [2021-11-21 01:29:10,730 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:29:10,824 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:29:10,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:29:10 WrapperNode [2021-11-21 01:29:10,825 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:29:10,827 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:29:10,827 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:29:10,828 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:29:10,838 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:29:10" (1/1) ... [2021-11-21 01:29:10,968 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:29:10" (1/1) ... [2021-11-21 01:29:11,541 INFO L137 Inliner]: procedures = 56, calls = 60, calls flagged for inlining = 33, calls inlined = 33, statements flattened = 12856 [2021-11-21 01:29:11,542 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:29:11,543 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:29:11,543 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:29:11,543 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:29:11,555 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:29:10" (1/1) ... [2021-11-21 01:29:11,555 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:29:10" (1/1) ... [2021-11-21 01:29:11,646 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:29:10" (1/1) ... [2021-11-21 01:29:11,661 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:29:10" (1/1) ... [2021-11-21 01:29:11,904 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:29:10" (1/1) ... [2021-11-21 01:29:11,985 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:29:10" (1/1) ... [2021-11-21 01:29:12,084 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:29:10" (1/1) ... [2021-11-21 01:29:12,206 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:29:12,207 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:29:12,207 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:29:12,208 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:29:12,209 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:29:10" (1/1) ... [2021-11-21 01:29:12,219 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:29:12,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:29:12,363 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:29:12,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:29:12,413 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:29:12,413 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-11-21 01:29:12,413 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-11-21 01:29:12,414 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-21 01:29:12,414 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-21 01:29:12,414 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-11-21 01:29:12,414 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-11-21 01:29:12,414 INFO L130 BoogieDeclarations]: Found specification of procedure error [2021-11-21 01:29:12,415 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2021-11-21 01:29:12,415 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-11-21 01:29:12,415 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-11-21 01:29:12,415 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-11-21 01:29:12,415 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-11-21 01:29:12,416 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-11-21 01:29:12,416 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-11-21 01:29:12,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:29:12,416 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:29:12,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:29:12,591 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:29:12,594 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:29:22,028 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:29:24,746 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:29:24,746 INFO L301 CfgBuilder]: Removed 10 assume(true) statements. [2021-11-21 01:29:24,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:29:24 BoogieIcfgContainer [2021-11-21 01:29:24,752 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:29:24,755 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:29:24,755 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:29:24,759 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:29:24,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:29:06" (1/3) ... [2021-11-21 01:29:24,760 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ccdaa61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:29:24, skipping insertion in model container [2021-11-21 01:29:24,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:29:10" (2/3) ... [2021-11-21 01:29:24,761 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ccdaa61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:29:24, skipping insertion in model container [2021-11-21 01:29:24,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:29:24" (3/3) ... [2021-11-21 01:29:24,762 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label45+token_ring.06.cil-1.c [2021-11-21 01:29:24,768 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:29:24,769 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-21 01:29:24,839 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:29:24,848 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 [2021-11-21 01:29:24,848 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-21 01:29:24,922 INFO L276 IsEmpty]: Start isEmpty. Operand has 1771 states, 1739 states have (on average 1.968372627947096) internal successors, (3423), 1744 states have internal predecessors, (3423), 22 states have call successors, (22), 7 states have call predecessors, (22), 7 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-21 01:29:24,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-21 01:29:24,933 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:29:24,934 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] [2021-11-21 01:29:24,935 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:29:24,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:29:24,942 INFO L85 PathProgramCache]: Analyzing trace with hash 11915254, now seen corresponding path program 1 times [2021-11-21 01:29:24,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:29:24,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463631748] [2021-11-21 01:29:24,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:29:24,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:29:25,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:29:25,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:29:25,353 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:29:25,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463631748] [2021-11-21 01:29:25,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463631748] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:29:25,355 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:29:25,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:29:25,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384057946] [2021-11-21 01:29:25,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:29:25,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:29:25,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:29:25,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:29:25,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:29:25,407 INFO L87 Difference]: Start difference. First operand has 1771 states, 1739 states have (on average 1.968372627947096) internal successors, (3423), 1744 states have internal predecessors, (3423), 22 states have call successors, (22), 7 states have call predecessors, (22), 7 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 01:29:26,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:29:26,679 INFO L93 Difference]: Finished difference Result 3646 states and 7111 transitions. [2021-11-21 01:29:26,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:29:26,682 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 50 [2021-11-21 01:29:26,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:29:26,738 INFO L225 Difference]: With dead ends: 3646 [2021-11-21 01:29:26,738 INFO L226 Difference]: Without dead ends: 1874 [2021-11-21 01:29:26,755 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 [2021-11-21 01:29:26,764 INFO L933 BasicCegarLoop]: 3338 mSDtfsCounter, 3589 mSDsluCounter, 3535 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3589 SdHoareTripleChecker+Valid, 6600 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:29:26,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3589 Valid, 6600 Invalid, 648 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-21 01:29:26,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1874 states. [2021-11-21 01:29:26,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1874 to 1873. [2021-11-21 01:29:26,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1873 states, 1821 states have (on average 1.9406919275123558) internal successors, (3534), 1825 states have internal predecessors, (3534), 38 states have call successors, (38), 13 states have call predecessors, (38), 12 states have return successors, (36), 35 states have call predecessors, (36), 36 states have call successors, (36) [2021-11-21 01:29:26,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1873 states to 1873 states and 3608 transitions. [2021-11-21 01:29:26,974 INFO L78 Accepts]: Start accepts. Automaton has 1873 states and 3608 transitions. Word has length 50 [2021-11-21 01:29:26,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:29:26,975 INFO L470 AbstractCegarLoop]: Abstraction has 1873 states and 3608 transitions. [2021-11-21 01:29:26,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 01:29:26,975 INFO L276 IsEmpty]: Start isEmpty. Operand 1873 states and 3608 transitions. [2021-11-21 01:29:26,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-21 01:29:26,984 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:29:26,984 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:29:26,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:29:26,985 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:29:26,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:29:26,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1376567230, now seen corresponding path program 1 times [2021-11-21 01:29:26,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:29:26,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217703337] [2021-11-21 01:29:26,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:29:26,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:29:27,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:29:27,142 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-21 01:29:27,142 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:29:27,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217703337] [2021-11-21 01:29:27,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217703337] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:29:27,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338707266] [2021-11-21 01:29:27,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:29:27,144 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:29:27,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:29:27,153 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:29:27,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:29:27,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:29:27,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 637 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 01:29:27,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:29:27,779 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:29:27,780 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:29:27,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338707266] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:29:27,787 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:29:27,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-21 01:29:27,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086138760] [2021-11-21 01:29:27,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:29:27,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:29:27,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:29:27,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:29:27,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:29:27,799 INFO L87 Difference]: Start difference. First operand 1873 states and 3608 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-21 01:29:28,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:29:28,325 INFO L93 Difference]: Finished difference Result 2320 states and 4279 transitions. [2021-11-21 01:29:28,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:29:28,326 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 95 [2021-11-21 01:29:28,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:29:28,345 INFO L225 Difference]: With dead ends: 2320 [2021-11-21 01:29:28,345 INFO L226 Difference]: Without dead ends: 2093 [2021-11-21 01:29:28,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:29:28,349 INFO L933 BasicCegarLoop]: 3255 mSDtfsCounter, 3419 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3419 SdHoareTripleChecker+Valid, 3397 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:29:28,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3419 Valid, 3397 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 01:29:28,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2093 states. [2021-11-21 01:29:28,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2093 to 2087. [2021-11-21 01:29:28,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2087 states, 1993 states have (on average 1.8991470145509282) internal successors, (3785), 1998 states have internal predecessors, (3785), 68 states have call successors, (68), 25 states have call predecessors, (68), 24 states have return successors, (66), 64 states have call predecessors, (66), 66 states have call successors, (66) [2021-11-21 01:29:28,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2087 states to 2087 states and 3919 transitions. [2021-11-21 01:29:28,448 INFO L78 Accepts]: Start accepts. Automaton has 2087 states and 3919 transitions. Word has length 95 [2021-11-21 01:29:28,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:29:28,448 INFO L470 AbstractCegarLoop]: Abstraction has 2087 states and 3919 transitions. [2021-11-21 01:29:28,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-21 01:29:28,449 INFO L276 IsEmpty]: Start isEmpty. Operand 2087 states and 3919 transitions. [2021-11-21 01:29:28,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-21 01:29:28,454 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:29:28,454 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:29:28,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:29:28,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:29:28,677 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:29:28,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:29:28,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1837915426, now seen corresponding path program 1 times [2021-11-21 01:29:28,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:29:28,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788066526] [2021-11-21 01:29:28,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:29:28,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:29:28,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:29:28,852 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-21 01:29:28,853 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:29:28,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788066526] [2021-11-21 01:29:28,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788066526] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:29:28,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984057809] [2021-11-21 01:29:28,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:29:28,856 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:29:28,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:29:28,861 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:29:28,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 01:29:29,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:29:29,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 01:29:29,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:29:29,253 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-21 01:29:29,254 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:29:29,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984057809] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:29:29,254 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:29:29,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-21 01:29:29,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526935158] [2021-11-21 01:29:29,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:29:29,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:29:29,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:29:29,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:29:29,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:29:29,257 INFO L87 Difference]: Start difference. First operand 2087 states and 3919 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-21 01:29:29,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:29:29,825 INFO L93 Difference]: Finished difference Result 2956 states and 5218 transitions. [2021-11-21 01:29:29,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:29:29,826 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 95 [2021-11-21 01:29:29,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:29:29,849 INFO L225 Difference]: With dead ends: 2956 [2021-11-21 01:29:29,849 INFO L226 Difference]: Without dead ends: 2515 [2021-11-21 01:29:29,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:29:29,856 INFO L933 BasicCegarLoop]: 3254 mSDtfsCounter, 3428 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3428 SdHoareTripleChecker+Valid, 3396 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:29:29,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3428 Valid, 3396 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 01:29:29,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2515 states. [2021-11-21 01:29:29,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2515 to 2507. [2021-11-21 01:29:29,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2507 states, 2331 states have (on average 1.833976833976834) internal successors, (4275), 2338 states have internal predecessors, (4275), 126 states have call successors, (126), 49 states have call predecessors, (126), 48 states have return successors, (124), 120 states have call predecessors, (124), 124 states have call successors, (124) [2021-11-21 01:29:29,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2507 states to 2507 states and 4525 transitions. [2021-11-21 01:29:29,999 INFO L78 Accepts]: Start accepts. Automaton has 2507 states and 4525 transitions. Word has length 95 [2021-11-21 01:29:30,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:29:30,001 INFO L470 AbstractCegarLoop]: Abstraction has 2507 states and 4525 transitions. [2021-11-21 01:29:30,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-21 01:29:30,002 INFO L276 IsEmpty]: Start isEmpty. Operand 2507 states and 4525 transitions. [2021-11-21 01:29:30,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-21 01:29:30,007 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:29:30,007 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:29:30,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:29:30,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:29:30,223 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:29:30,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:29:30,224 INFO L85 PathProgramCache]: Analyzing trace with hash 222970814, now seen corresponding path program 1 times [2021-11-21 01:29:30,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:29:30,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515554147] [2021-11-21 01:29:30,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:29:30,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:29:30,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:29:30,304 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-21 01:29:30,305 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:29:30,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515554147] [2021-11-21 01:29:30,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515554147] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:29:30,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992918507] [2021-11-21 01:29:30,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:29:30,306 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:29:30,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:29:30,314 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:29:30,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 01:29:30,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:29:30,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 01:29:30,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:29:30,695 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-21 01:29:30,695 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:29:30,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992918507] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:29:30,695 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:29:30,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-21 01:29:30,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871033637] [2021-11-21 01:29:30,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:29:30,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:29:30,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:29:30,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:29:30,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:29:30,700 INFO L87 Difference]: Start difference. First operand 2507 states and 4525 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-21 01:29:31,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:29:31,193 INFO L93 Difference]: Finished difference Result 4204 states and 7046 transitions. [2021-11-21 01:29:31,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:29:31,194 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 95 [2021-11-21 01:29:31,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:29:31,221 INFO L225 Difference]: With dead ends: 4204 [2021-11-21 01:29:31,221 INFO L226 Difference]: Without dead ends: 3343 [2021-11-21 01:29:31,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:29:31,231 INFO L933 BasicCegarLoop]: 3221 mSDtfsCounter, 3425 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3425 SdHoareTripleChecker+Valid, 3363 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:29:31,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3425 Valid, 3363 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 01:29:31,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3343 states. [2021-11-21 01:29:31,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3343 to 3331. [2021-11-21 01:29:31,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3331 states, 2995 states have (on average 1.7465776293823039) internal successors, (5231), 3006 states have internal predecessors, (5231), 238 states have call successors, (238), 97 states have call predecessors, (238), 96 states have return successors, (236), 228 states have call predecessors, (236), 236 states have call successors, (236) [2021-11-21 01:29:31,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3331 states to 3331 states and 5705 transitions. [2021-11-21 01:29:31,411 INFO L78 Accepts]: Start accepts. Automaton has 3331 states and 5705 transitions. Word has length 95 [2021-11-21 01:29:31,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:29:31,412 INFO L470 AbstractCegarLoop]: Abstraction has 3331 states and 5705 transitions. [2021-11-21 01:29:31,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-21 01:29:31,412 INFO L276 IsEmpty]: Start isEmpty. Operand 3331 states and 5705 transitions. [2021-11-21 01:29:31,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-21 01:29:31,425 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:29:31,426 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:29:31,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 01:29:31,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-11-21 01:29:31,653 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:29:31,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:29:31,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1400746274, now seen corresponding path program 1 times [2021-11-21 01:29:31,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:29:31,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686556899] [2021-11-21 01:29:31,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:29:31,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:29:31,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:29:31,764 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-21 01:29:31,765 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:29:31,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686556899] [2021-11-21 01:29:31,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686556899] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:29:31,765 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:29:31,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:29:31,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910172984] [2021-11-21 01:29:31,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:29:31,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:29:31,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:29:31,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:29:31,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:29:31,768 INFO L87 Difference]: Start difference. First operand 3331 states and 5705 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-21 01:29:32,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:29:32,321 INFO L93 Difference]: Finished difference Result 4647 states and 7668 transitions. [2021-11-21 01:29:32,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:29:32,322 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 95 [2021-11-21 01:29:32,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:29:32,350 INFO L225 Difference]: With dead ends: 4647 [2021-11-21 01:29:32,350 INFO L226 Difference]: Without dead ends: 3771 [2021-11-21 01:29:32,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:29:32,358 INFO L933 BasicCegarLoop]: 3283 mSDtfsCounter, 73 mSDsluCounter, 3452 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 6496 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:29:32,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 6496 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 01:29:32,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3771 states. [2021-11-21 01:29:32,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3771 to 3615. [2021-11-21 01:29:32,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3615 states, 3263 states have (on average 1.7428746552252528) internal successors, (5687), 3274 states have internal predecessors, (5687), 246 states have call successors, (246), 105 states have call predecessors, (246), 104 states have return successors, (244), 236 states have call predecessors, (244), 244 states have call successors, (244) [2021-11-21 01:29:32,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3615 states to 3615 states and 6177 transitions. [2021-11-21 01:29:32,509 INFO L78 Accepts]: Start accepts. Automaton has 3615 states and 6177 transitions. Word has length 95 [2021-11-21 01:29:32,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:29:32,512 INFO L470 AbstractCegarLoop]: Abstraction has 3615 states and 6177 transitions. [2021-11-21 01:29:32,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-21 01:29:32,513 INFO L276 IsEmpty]: Start isEmpty. Operand 3615 states and 6177 transitions. [2021-11-21 01:29:32,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-21 01:29:32,520 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:29:32,521 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:29:32,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 01:29:32,521 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:29:32,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:29:32,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1903348241, now seen corresponding path program 1 times [2021-11-21 01:29:32,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:29:32,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945646504] [2021-11-21 01:29:32,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:29:32,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:29:32,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:29:32,640 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-21 01:29:32,640 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:29:32,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945646504] [2021-11-21 01:29:32,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945646504] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:29:32,640 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:29:32,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:29:32,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221962327] [2021-11-21 01:29:32,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:29:32,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:29:32,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:29:32,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:29:32,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:29:32,642 INFO L87 Difference]: Start difference. First operand 3615 states and 6177 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-21 01:29:33,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:29:33,312 INFO L93 Difference]: Finished difference Result 7480 states and 11970 transitions. [2021-11-21 01:29:33,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:29:33,313 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 127 [2021-11-21 01:29:33,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:29:33,349 INFO L225 Difference]: With dead ends: 7480 [2021-11-21 01:29:33,349 INFO L226 Difference]: Without dead ends: 5511 [2021-11-21 01:29:33,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:29:33,358 INFO L933 BasicCegarLoop]: 3223 mSDtfsCounter, 3417 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3417 SdHoareTripleChecker+Valid, 3365 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:29:33,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3417 Valid, 3365 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 01:29:33,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5511 states. [2021-11-21 01:29:33,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5511 to 5483. [2021-11-21 01:29:33,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5483 states, 4803 states have (on average 1.6537580678742452) internal successors, (7943), 4822 states have internal predecessors, (7943), 470 states have call successors, (470), 209 states have call predecessors, (470), 208 states have return successors, (468), 452 states have call predecessors, (468), 468 states have call successors, (468) [2021-11-21 01:29:33,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5483 states to 5483 states and 8881 transitions. [2021-11-21 01:29:33,617 INFO L78 Accepts]: Start accepts. Automaton has 5483 states and 8881 transitions. Word has length 127 [2021-11-21 01:29:33,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:29:33,618 INFO L470 AbstractCegarLoop]: Abstraction has 5483 states and 8881 transitions. [2021-11-21 01:29:33,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-21 01:29:33,620 INFO L276 IsEmpty]: Start isEmpty. Operand 5483 states and 8881 transitions. [2021-11-21 01:29:33,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-21 01:29:33,633 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:29:33,633 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:29:33,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-21 01:29:33,634 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:29:33,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:29:33,634 INFO L85 PathProgramCache]: Analyzing trace with hash 2119137817, now seen corresponding path program 1 times [2021-11-21 01:29:33,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:29:33,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324512831] [2021-11-21 01:29:33,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:29:33,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:29:33,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:29:33,723 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-21 01:29:33,723 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:29:33,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324512831] [2021-11-21 01:29:33,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324512831] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:29:33,724 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:29:33,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:29:33,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246461040] [2021-11-21 01:29:33,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:29:33,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:29:33,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:29:33,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:29:33,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:29:33,728 INFO L87 Difference]: Start difference. First operand 5483 states and 8881 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-21 01:29:34,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:29:34,363 INFO L93 Difference]: Finished difference Result 13012 states and 20058 transitions. [2021-11-21 01:29:34,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:29:34,364 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 127 [2021-11-21 01:29:34,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:29:34,441 INFO L225 Difference]: With dead ends: 13012 [2021-11-21 01:29:34,441 INFO L226 Difference]: Without dead ends: 9175 [2021-11-21 01:29:34,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:29:34,460 INFO L933 BasicCegarLoop]: 3223 mSDtfsCounter, 3419 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3419 SdHoareTripleChecker+Valid, 3365 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:29:34,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3419 Valid, 3365 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 01:29:34,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9175 states. [2021-11-21 01:29:34,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9175 to 9123. [2021-11-21 01:29:34,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9123 states, 7803 states have (on average 1.575676022042804) internal successors, (12295), 7838 states have internal predecessors, (12295), 902 states have call successors, (902), 417 states have call predecessors, (902), 416 states have return successors, (900), 868 states have call predecessors, (900), 900 states have call successors, (900) [2021-11-21 01:29:34,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9123 states to 9123 states and 14097 transitions. [2021-11-21 01:29:34,875 INFO L78 Accepts]: Start accepts. Automaton has 9123 states and 14097 transitions. Word has length 127 [2021-11-21 01:29:34,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:29:34,877 INFO L470 AbstractCegarLoop]: Abstraction has 9123 states and 14097 transitions. [2021-11-21 01:29:34,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-21 01:29:34,877 INFO L276 IsEmpty]: Start isEmpty. Operand 9123 states and 14097 transitions. [2021-11-21 01:29:34,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-21 01:29:34,905 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:29:34,905 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:29:34,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-21 01:29:34,906 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:29:34,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:29:34,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1785271813, now seen corresponding path program 1 times [2021-11-21 01:29:34,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:29:34,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931615850] [2021-11-21 01:29:34,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:29:34,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:29:34,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:29:34,976 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-21 01:29:34,977 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:29:34,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931615850] [2021-11-21 01:29:34,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931615850] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:29:34,977 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:29:34,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:29:34,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915394638] [2021-11-21 01:29:34,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:29:34,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:29:34,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:29:34,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:29:34,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:29:34,979 INFO L87 Difference]: Start difference. First operand 9123 states and 14097 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-21 01:29:35,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:29:35,825 INFO L93 Difference]: Finished difference Result 23788 states and 35642 transitions. [2021-11-21 01:29:35,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:29:35,826 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 127 [2021-11-21 01:29:35,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:29:35,894 INFO L225 Difference]: With dead ends: 23788 [2021-11-21 01:29:35,894 INFO L226 Difference]: Without dead ends: 16311 [2021-11-21 01:29:35,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:29:35,932 INFO L933 BasicCegarLoop]: 3238 mSDtfsCounter, 3422 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3422 SdHoareTripleChecker+Valid, 3380 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:29:35,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3422 Valid, 3380 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 01:29:35,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16311 states. [2021-11-21 01:29:36,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16311 to 16211. [2021-11-21 01:29:36,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16211 states, 13643 states have (on average 1.5157223484570843) internal successors, (20679), 13710 states have internal predecessors, (20679), 1734 states have call successors, (1734), 833 states have call predecessors, (1734), 832 states have return successors, (1732), 1668 states have call predecessors, (1732), 1732 states have call successors, (1732) [2021-11-21 01:29:36,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16211 states to 16211 states and 24145 transitions. [2021-11-21 01:29:36,626 INFO L78 Accepts]: Start accepts. Automaton has 16211 states and 24145 transitions. Word has length 127 [2021-11-21 01:29:36,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:29:36,627 INFO L470 AbstractCegarLoop]: Abstraction has 16211 states and 24145 transitions. [2021-11-21 01:29:36,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-21 01:29:36,627 INFO L276 IsEmpty]: Start isEmpty. Operand 16211 states and 24145 transitions. [2021-11-21 01:29:36,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-21 01:29:36,686 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:29:36,687 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-21 01:29:36,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-21 01:29:36,688 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:29:36,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:29:36,688 INFO L85 PathProgramCache]: Analyzing trace with hash 2017122193, now seen corresponding path program 1 times [2021-11-21 01:29:36,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:29:36,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260253008] [2021-11-21 01:29:36,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:29:36,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:29:36,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:29:36,776 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-21 01:29:36,776 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:29:36,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260253008] [2021-11-21 01:29:36,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260253008] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:29:36,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746227975] [2021-11-21 01:29:36,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:29:36,777 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:29:36,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:29:36,778 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:29:36,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 01:29:36,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:29:36,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 824 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:29:36,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:29:37,296 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-21 01:29:37,296 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:29:37,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746227975] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:29:37,297 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:29:37,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-21 01:29:37,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198142805] [2021-11-21 01:29:37,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:29:37,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:29:37,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:29:37,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:29:37,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:29:37,299 INFO L87 Difference]: Start difference. First operand 16211 states and 24145 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-21 01:29:38,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:29:38,416 INFO L93 Difference]: Finished difference Result 23755 states and 35511 transitions. [2021-11-21 01:29:38,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:29:38,417 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 146 [2021-11-21 01:29:38,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:29:38,485 INFO L225 Difference]: With dead ends: 23755 [2021-11-21 01:29:38,485 INFO L226 Difference]: Without dead ends: 16279 [2021-11-21 01:29:38,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:29:38,516 INFO L933 BasicCegarLoop]: 3332 mSDtfsCounter, 140 mSDsluCounter, 3440 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 6532 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:29:38,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 6532 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 01:29:38,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16279 states. [2021-11-21 01:29:39,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16279 to 16147. [2021-11-21 01:29:39,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16147 states, 13579 states have (on average 1.4993003903085647) internal successors, (20359), 13646 states have internal predecessors, (20359), 1734 states have call successors, (1734), 833 states have call predecessors, (1734), 832 states have return successors, (1732), 1668 states have call predecessors, (1732), 1732 states have call successors, (1732) [2021-11-21 01:29:39,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16147 states to 16147 states and 23825 transitions. [2021-11-21 01:29:39,422 INFO L78 Accepts]: Start accepts. Automaton has 16147 states and 23825 transitions. Word has length 146 [2021-11-21 01:29:39,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:29:39,423 INFO L470 AbstractCegarLoop]: Abstraction has 16147 states and 23825 transitions. [2021-11-21 01:29:39,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-21 01:29:39,423 INFO L276 IsEmpty]: Start isEmpty. Operand 16147 states and 23825 transitions. [2021-11-21 01:29:39,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-21 01:29:39,485 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:29:39,486 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1] [2021-11-21 01:29:39,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 01:29:39,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:29:39,701 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:29:39,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:29:39,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1170885233, now seen corresponding path program 1 times [2021-11-21 01:29:39,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:29:39,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501870581] [2021-11-21 01:29:39,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:29:39,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:29:39,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:29:39,794 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 43 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-21 01:29:39,794 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:29:39,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501870581] [2021-11-21 01:29:39,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501870581] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:29:39,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51439077] [2021-11-21 01:29:39,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:29:39,795 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:29:39,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:29:39,796 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:29:39,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 01:29:39,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:29:39,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 830 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:29:39,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:29:40,270 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-21 01:29:40,270 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:29:40,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51439077] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:29:40,271 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:29:40,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-21 01:29:40,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948632343] [2021-11-21 01:29:40,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:29:40,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:29:40,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:29:40,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:29:40,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:29:40,273 INFO L87 Difference]: Start difference. First operand 16147 states and 23825 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-21 01:29:41,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:29:41,297 INFO L93 Difference]: Finished difference Result 23659 states and 35031 transitions. [2021-11-21 01:29:41,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:29:41,298 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 146 [2021-11-21 01:29:41,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:29:41,362 INFO L225 Difference]: With dead ends: 23659 [2021-11-21 01:29:41,362 INFO L226 Difference]: Without dead ends: 16215 [2021-11-21 01:29:41,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:29:41,390 INFO L933 BasicCegarLoop]: 3327 mSDtfsCounter, 156 mSDsluCounter, 3439 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 6526 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:29:41,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 6526 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 01:29:41,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16215 states. [2021-11-21 01:29:42,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16215 to 16083. [2021-11-21 01:29:42,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16083 states, 13515 states have (on average 1.482722900480947) internal successors, (20039), 13582 states have internal predecessors, (20039), 1734 states have call successors, (1734), 833 states have call predecessors, (1734), 832 states have return successors, (1732), 1668 states have call predecessors, (1732), 1732 states have call successors, (1732) [2021-11-21 01:29:42,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16083 states to 16083 states and 23505 transitions. [2021-11-21 01:29:42,325 INFO L78 Accepts]: Start accepts. Automaton has 16083 states and 23505 transitions. Word has length 146 [2021-11-21 01:29:42,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:29:42,326 INFO L470 AbstractCegarLoop]: Abstraction has 16083 states and 23505 transitions. [2021-11-21 01:29:42,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-21 01:29:42,326 INFO L276 IsEmpty]: Start isEmpty. Operand 16083 states and 23505 transitions. [2021-11-21 01:29:42,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-21 01:29:42,385 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:29:42,385 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1] [2021-11-21 01:29:42,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-21 01:29:42,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:29:42,601 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:29:42,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:29:42,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1359265454, now seen corresponding path program 1 times [2021-11-21 01:29:42,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:29:42,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511979452] [2021-11-21 01:29:42,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:29:42,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:29:42,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:29:42,703 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 10 proven. 42 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-21 01:29:42,704 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:29:42,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511979452] [2021-11-21 01:29:42,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511979452] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:29:42,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682958111] [2021-11-21 01:29:42,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:29:42,705 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:29:42,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:29:42,709 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:29:42,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 01:29:42,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:29:42,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 833 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 01:29:42,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:29:43,189 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-21 01:29:43,189 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:29:43,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682958111] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:29:43,190 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:29:43,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-21 01:29:43,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741797845] [2021-11-21 01:29:43,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:29:43,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:29:43,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:29:43,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:29:43,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:29:43,196 INFO L87 Difference]: Start difference. First operand 16083 states and 23505 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-21 01:29:43,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:29:43,931 INFO L93 Difference]: Finished difference Result 27201 states and 38574 transitions. [2021-11-21 01:29:43,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:29:43,932 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 146 [2021-11-21 01:29:43,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:29:44,011 INFO L225 Difference]: With dead ends: 27201 [2021-11-21 01:29:44,011 INFO L226 Difference]: Without dead ends: 19853 [2021-11-21 01:29:44,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:29:44,041 INFO L933 BasicCegarLoop]: 3227 mSDtfsCounter, 3422 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3422 SdHoareTripleChecker+Valid, 3266 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:29:44,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3422 Valid, 3266 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 01:29:44,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19853 states. [2021-11-21 01:29:44,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19853 to 19853. [2021-11-21 01:29:45,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19853 states, 16905 states have (on average 1.4237799467613133) internal successors, (24069), 16972 states have internal predecessors, (24069), 1860 states have call successors, (1860), 1087 states have call predecessors, (1860), 1086 states have return successors, (1858), 1794 states have call predecessors, (1858), 1858 states have call successors, (1858) [2021-11-21 01:29:45,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19853 states to 19853 states and 27787 transitions. [2021-11-21 01:29:45,080 INFO L78 Accepts]: Start accepts. Automaton has 19853 states and 27787 transitions. Word has length 146 [2021-11-21 01:29:45,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:29:45,081 INFO L470 AbstractCegarLoop]: Abstraction has 19853 states and 27787 transitions. [2021-11-21 01:29:45,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-21 01:29:45,081 INFO L276 IsEmpty]: Start isEmpty. Operand 19853 states and 27787 transitions. [2021-11-21 01:29:45,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-21 01:29:45,141 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:29:45,142 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1] [2021-11-21 01:29:45,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-21 01:29:45,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:29:45,365 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:29:45,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:29:45,365 INFO L85 PathProgramCache]: Analyzing trace with hash -375064123, now seen corresponding path program 1 times [2021-11-21 01:29:45,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:29:45,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481912696] [2021-11-21 01:29:45,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:29:45,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:29:45,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:29:45,455 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 10 proven. 41 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-21 01:29:45,455 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:29:45,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481912696] [2021-11-21 01:29:45,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481912696] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:29:45,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447042286] [2021-11-21 01:29:45,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:29:45,456 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:29:45,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:29:45,457 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:29:45,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 01:29:45,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:29:45,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 836 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:29:45,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:29:46,069 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-21 01:29:46,069 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:29:46,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447042286] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:29:46,069 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:29:46,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-21 01:29:46,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629464313] [2021-11-21 01:29:46,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:29:46,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:29:46,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:29:46,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:29:46,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:29:46,072 INFO L87 Difference]: Start difference. First operand 19853 states and 27787 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-21 01:29:47,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:29:47,372 INFO L93 Difference]: Finished difference Result 44457 states and 61892 transitions. [2021-11-21 01:29:47,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:29:47,374 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 146 [2021-11-21 01:29:47,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:29:47,474 INFO L225 Difference]: With dead ends: 44457 [2021-11-21 01:29:47,474 INFO L226 Difference]: Without dead ends: 26251 [2021-11-21 01:29:47,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:29:47,509 INFO L933 BasicCegarLoop]: 3230 mSDtfsCounter, 80 mSDsluCounter, 3434 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 6427 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:29:47,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 6427 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 01:29:47,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26251 states. [2021-11-21 01:29:48,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26251 to 21813. [2021-11-21 01:29:48,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21813 states, 18733 states have (on average 1.44563070517269) internal successors, (27081), 18801 states have internal predecessors, (27081), 1926 states have call successors, (1926), 1153 states have call predecessors, (1926), 1152 states have return successors, (1924), 1859 states have call predecessors, (1924), 1924 states have call successors, (1924) [2021-11-21 01:29:48,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21813 states to 21813 states and 30931 transitions. [2021-11-21 01:29:48,642 INFO L78 Accepts]: Start accepts. Automaton has 21813 states and 30931 transitions. Word has length 146 [2021-11-21 01:29:48,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:29:48,643 INFO L470 AbstractCegarLoop]: Abstraction has 21813 states and 30931 transitions. [2021-11-21 01:29:48,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-21 01:29:48,643 INFO L276 IsEmpty]: Start isEmpty. Operand 21813 states and 30931 transitions. [2021-11-21 01:29:48,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-21 01:29:48,685 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:29:48,685 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1] [2021-11-21 01:29:48,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-21 01:29:48,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-21 01:29:48,913 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:29:48,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:29:48,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1042335357, now seen corresponding path program 2 times [2021-11-21 01:29:48,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:29:48,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754556395] [2021-11-21 01:29:48,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:29:48,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:29:48,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:29:48,987 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-21 01:29:48,988 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:29:48,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754556395] [2021-11-21 01:29:48,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754556395] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:29:48,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782278318] [2021-11-21 01:29:48,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:29:48,989 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:29:48,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:29:48,990 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:29:49,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-21 01:29:49,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-21 01:29:49,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:29:49,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 830 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 01:29:49,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:29:49,446 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-21 01:29:49,446 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:29:49,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782278318] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:29:49,446 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:29:49,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-11-21 01:29:49,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459668757] [2021-11-21 01:29:49,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:29:49,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:29:49,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:29:49,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:29:49,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:29:49,448 INFO L87 Difference]: Start difference. First operand 21813 states and 30931 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-21 01:29:50,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:29:50,613 INFO L93 Difference]: Finished difference Result 40347 states and 56949 transitions. [2021-11-21 01:29:50,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:29:50,614 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 146 [2021-11-21 01:29:50,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:29:50,711 INFO L225 Difference]: With dead ends: 40347 [2021-11-21 01:29:50,712 INFO L226 Difference]: Without dead ends: 30135 [2021-11-21 01:29:50,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:29:50,734 INFO L933 BasicCegarLoop]: 3308 mSDtfsCounter, 116 mSDsluCounter, 3451 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 6521 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:29:50,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 6521 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 01:29:50,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30135 states. [2021-11-21 01:29:51,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30135 to 25525. [2021-11-21 01:29:51,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25525 states, 22189 states have (on average 1.4771733741944206) internal successors, (32777), 22257 states have internal predecessors, (32777), 2054 states have call successors, (2054), 1281 states have call predecessors, (2054), 1280 states have return successors, (2052), 1987 states have call predecessors, (2052), 2052 states have call successors, (2052) [2021-11-21 01:29:51,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25525 states to 25525 states and 36883 transitions. [2021-11-21 01:29:51,927 INFO L78 Accepts]: Start accepts. Automaton has 25525 states and 36883 transitions. Word has length 146 [2021-11-21 01:29:51,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:29:51,928 INFO L470 AbstractCegarLoop]: Abstraction has 25525 states and 36883 transitions. [2021-11-21 01:29:51,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-21 01:29:51,928 INFO L276 IsEmpty]: Start isEmpty. Operand 25525 states and 36883 transitions. [2021-11-21 01:29:51,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-21 01:29:51,974 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:29:51,974 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1] [2021-11-21 01:29:52,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-21 01:29:52,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-21 01:29:52,189 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:29:52,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:29:52,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1623809248, now seen corresponding path program 1 times [2021-11-21 01:29:52,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:29:52,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944777203] [2021-11-21 01:29:52,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:29:52,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:29:52,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:29:52,271 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 13 proven. 41 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-21 01:29:52,271 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:29:52,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944777203] [2021-11-21 01:29:52,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944777203] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:29:52,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440262242] [2021-11-21 01:29:52,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:29:52,272 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:29:52,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:29:52,273 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:29:52,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-21 01:29:52,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:29:52,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 843 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 01:29:52,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:29:52,766 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-21 01:29:52,766 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:29:52,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440262242] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:29:52,767 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:29:52,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-11-21 01:29:52,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227391575] [2021-11-21 01:29:52,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:29:52,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:29:52,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:29:52,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:29:52,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:29:52,769 INFO L87 Difference]: Start difference. First operand 25525 states and 36883 transitions. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-21 01:29:54,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:29:54,855 INFO L93 Difference]: Finished difference Result 74111 states and 105015 transitions. [2021-11-21 01:29:54,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:29:54,856 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 147 [2021-11-21 01:29:54,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:29:55,185 INFO L225 Difference]: With dead ends: 74111 [2021-11-21 01:29:55,186 INFO L226 Difference]: Without dead ends: 50233 [2021-11-21 01:29:55,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-21 01:29:55,228 INFO L933 BasicCegarLoop]: 3355 mSDtfsCounter, 3445 mSDsluCounter, 3766 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3445 SdHoareTripleChecker+Valid, 6833 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:29:55,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3445 Valid, 6833 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 01:29:55,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50233 states. [2021-11-21 01:29:57,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50233 to 49965. [2021-11-21 01:29:57,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49965 states, 43243 states have (on average 1.431329926230835) internal successors, (61895), 43504 states have internal predecessors, (61895), 4035 states have call successors, (4035), 2558 states have call predecessors, (4035), 2685 states have return successors, (4829), 3903 states have call predecessors, (4829), 4033 states have call successors, (4829) [2021-11-21 01:29:57,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49965 states to 49965 states and 70759 transitions. [2021-11-21 01:29:57,411 INFO L78 Accepts]: Start accepts. Automaton has 49965 states and 70759 transitions. Word has length 147 [2021-11-21 01:29:57,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:29:57,412 INFO L470 AbstractCegarLoop]: Abstraction has 49965 states and 70759 transitions. [2021-11-21 01:29:57,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-21 01:29:57,412 INFO L276 IsEmpty]: Start isEmpty. Operand 49965 states and 70759 transitions. [2021-11-21 01:29:57,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-21 01:29:57,848 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:29:57,849 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1] [2021-11-21 01:29:57,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-21 01:29:58,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:29:58,069 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:29:58,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:29:58,069 INFO L85 PathProgramCache]: Analyzing trace with hash -331511967, now seen corresponding path program 2 times [2021-11-21 01:29:58,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:29:58,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39558458] [2021-11-21 01:29:58,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:29:58,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:29:58,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:29:58,177 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-21 01:29:58,178 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:29:58,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39558458] [2021-11-21 01:29:58,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39558458] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:29:58,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139913983] [2021-11-21 01:29:58,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:29:58,179 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:29:58,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:29:58,180 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:29:58,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-21 01:29:58,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-21 01:29:58,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:29:58,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:29:58,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:29:58,627 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-21 01:29:58,628 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:29:58,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139913983] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:29:58,628 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:29:58,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-21 01:29:58,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776822703] [2021-11-21 01:29:58,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:29:58,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:29:58,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:29:58,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:29:58,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:29:58,632 INFO L87 Difference]: Start difference. First operand 49965 states and 70759 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-21 01:30:01,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:30:01,050 INFO L93 Difference]: Finished difference Result 98407 states and 141519 transitions. [2021-11-21 01:30:01,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:30:01,051 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 147 [2021-11-21 01:30:01,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:30:01,329 INFO L225 Difference]: With dead ends: 98407 [2021-11-21 01:30:01,329 INFO L226 Difference]: Without dead ends: 72937 [2021-11-21 01:30:01,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:30:01,401 INFO L933 BasicCegarLoop]: 3243 mSDtfsCounter, 3413 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3413 SdHoareTripleChecker+Valid, 3383 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:30:01,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3413 Valid, 3383 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 01:30:01,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72937 states. [2021-11-21 01:30:04,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72937 to 72417. [2021-11-21 01:30:04,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72417 states, 62439 states have (on average 1.4227486026361729) internal successors, (88835), 62764 states have internal predecessors, (88835), 6015 states have call successors, (6015), 3834 states have call predecessors, (6015), 3961 states have return successors, (7829), 5819 states have call predecessors, (7829), 6013 states have call successors, (7829) [2021-11-21 01:30:04,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72417 states to 72417 states and 102679 transitions. [2021-11-21 01:30:04,359 INFO L78 Accepts]: Start accepts. Automaton has 72417 states and 102679 transitions. Word has length 147 [2021-11-21 01:30:04,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:30:04,360 INFO L470 AbstractCegarLoop]: Abstraction has 72417 states and 102679 transitions. [2021-11-21 01:30:04,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-21 01:30:04,360 INFO L276 IsEmpty]: Start isEmpty. Operand 72417 states and 102679 transitions. [2021-11-21 01:30:04,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-21 01:30:04,492 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:30:04,493 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1] [2021-11-21 01:30:04,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-21 01:30:04,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-21 01:30:04,721 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:30:04,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:30:04,721 INFO L85 PathProgramCache]: Analyzing trace with hash 877294661, now seen corresponding path program 3 times [2021-11-21 01:30:04,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:30:04,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314100941] [2021-11-21 01:30:04,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:30:04,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:30:04,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:30:04,821 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-21 01:30:04,821 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:30:04,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314100941] [2021-11-21 01:30:04,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314100941] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:30:04,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42802152] [2021-11-21 01:30:04,822 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:30:04,822 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:30:04,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:30:04,823 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:30:04,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-21 01:30:04,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:30:04,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:30:04,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:30:04,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:30:05,265 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 01:30:05,266 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:30:05,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42802152] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:30:05,266 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:30:05,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-21 01:30:05,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284529153] [2021-11-21 01:30:05,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:30:05,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:30:05,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:30:05,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:30:05,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:30:05,268 INFO L87 Difference]: Start difference. First operand 72417 states and 102679 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-21 01:30:08,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:30:08,073 INFO L93 Difference]: Finished difference Result 125327 states and 177820 transitions. [2021-11-21 01:30:08,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:30:08,073 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 147 [2021-11-21 01:30:08,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:30:08,560 INFO L225 Difference]: With dead ends: 125327 [2021-11-21 01:30:08,560 INFO L226 Difference]: Without dead ends: 84363 [2021-11-21 01:30:08,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:30:08,640 INFO L933 BasicCegarLoop]: 3232 mSDtfsCounter, 3395 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3395 SdHoareTripleChecker+Valid, 3278 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:30:08,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3395 Valid, 3278 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 01:30:08,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84363 states. [2021-11-21 01:30:11,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84363 to 83875. [2021-11-21 01:30:11,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83875 states, 73085 states have (on average 1.382622973250325) internal successors, (101049), 73474 states have internal predecessors, (101049), 6197 states have call successors, (6197), 4400 states have call predecessors, (6197), 4591 states have return successors, (8755), 6001 states have call predecessors, (8755), 6195 states have call successors, (8755) [2021-11-21 01:30:11,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83875 states to 83875 states and 116001 transitions. [2021-11-21 01:30:11,785 INFO L78 Accepts]: Start accepts. Automaton has 83875 states and 116001 transitions. Word has length 147 [2021-11-21 01:30:11,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:30:11,785 INFO L470 AbstractCegarLoop]: Abstraction has 83875 states and 116001 transitions. [2021-11-21 01:30:11,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-21 01:30:11,786 INFO L276 IsEmpty]: Start isEmpty. Operand 83875 states and 116001 transitions. [2021-11-21 01:30:11,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-21 01:30:11,943 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:30:11,943 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-21 01:30:11,978 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-11-21 01:30:12,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-21 01:30:12,169 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:30:12,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:30:12,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1498934157, now seen corresponding path program 1 times [2021-11-21 01:30:12,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:30:12,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840352746] [2021-11-21 01:30:12,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:30:12,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:30:12,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:30:12,234 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-21 01:30:12,235 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:30:12,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840352746] [2021-11-21 01:30:12,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840352746] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:30:12,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143954387] [2021-11-21 01:30:12,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:30:12,236 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:30:12,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:30:12,237 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:30:12,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e039fd5e-b0e6-40a5-842e-453a98f95068/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-21 01:30:12,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:30:12,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 813 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 01:30:12,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:30:12,688 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-21 01:30:12,688 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:30:12,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143954387] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:30:12,688 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:30:12,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-11-21 01:30:12,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064134911] [2021-11-21 01:30:12,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:30:12,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:30:12,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:30:12,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:30:12,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:30:12,690 INFO L87 Difference]: Start difference. First operand 83875 states and 116001 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-21 01:30:16,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:30:16,105 INFO L93 Difference]: Finished difference Result 149545 states and 208623 transitions. [2021-11-21 01:30:16,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:30:16,106 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 143 [2021-11-21 01:30:16,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:30:16,625 INFO L225 Difference]: With dead ends: 149545 [2021-11-21 01:30:16,626 INFO L226 Difference]: Without dead ends: 93225 [2021-11-21 01:30:16,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:30:16,718 INFO L933 BasicCegarLoop]: 3300 mSDtfsCounter, 92 mSDsluCounter, 3451 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 6513 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:30:16,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 6513 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 01:30:16,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93225 states.