./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product23.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1640bdb6-0a05-493a-94e9-357bef168c89/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1640bdb6-0a05-493a-94e9-357bef168c89/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1640bdb6-0a05-493a-94e9-357bef168c89/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1640bdb6-0a05-493a-94e9-357bef168c89/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product23.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1640bdb6-0a05-493a-94e9-357bef168c89/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1640bdb6-0a05-493a-94e9-357bef168c89/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f91feaa60fbddcfc87f4cdb3911bff4dfabb88b0b67a46a205760e052b15032c --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:46:54,180 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:46:54,182 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:46:54,216 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:46:54,217 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:46:54,218 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:46:54,220 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:46:54,223 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:46:54,225 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:46:54,226 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:46:54,228 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:46:54,229 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:46:54,230 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:46:54,231 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:46:54,233 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:46:54,234 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:46:54,235 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:46:54,236 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:46:54,239 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:46:54,242 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:46:54,244 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:46:54,246 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:46:54,247 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:46:54,249 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:46:54,253 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:46:54,254 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:46:54,254 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:46:54,263 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:46:54,264 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:46:54,265 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:46:54,265 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:46:54,266 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:46:54,267 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:46:54,268 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:46:54,269 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:46:54,270 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:46:54,271 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:46:54,271 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:46:54,271 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:46:54,272 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:46:54,273 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:46:54,281 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1640bdb6-0a05-493a-94e9-357bef168c89/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 18:46:54,335 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:46:54,335 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:46:54,336 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:46:54,336 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:46:54,340 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:46:54,340 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:46:54,341 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:46:54,341 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:46:54,341 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:46:54,341 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:46:54,342 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:46:54,343 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:46:54,343 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:46:54,343 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:46:54,343 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:46:54,344 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:46:54,344 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:46:54,344 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:46:54,345 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:46:54,345 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:46:54,345 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:46:54,345 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:46:54,346 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:46:54,346 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:46:54,346 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:46:54,346 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:46:54,348 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:46:54,349 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:46:54,349 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:46:54,349 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:46:54,349 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:46:54,350 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:46:54,350 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:46:54,350 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:46:54,350 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:46:54,351 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:46:54,351 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:46:54,351 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:46:54,351 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:46:54,351 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:46:54,352 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:46:54,352 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_1640bdb6-0a05-493a-94e9-357bef168c89/bin/utaipan-eEHZpOm5b7/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1640bdb6-0a05-493a-94e9-357bef168c89/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f91feaa60fbddcfc87f4cdb3911bff4dfabb88b0b67a46a205760e052b15032c [2021-11-25 18:46:54,623 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:46:54,653 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:46:54,655 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:46:54,657 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:46:54,657 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:46:54,659 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1640bdb6-0a05-493a-94e9-357bef168c89/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/product-lines/elevator_spec3_product23.cil.c [2021-11-25 18:46:54,737 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1640bdb6-0a05-493a-94e9-357bef168c89/bin/utaipan-eEHZpOm5b7/data/c073fc4f2/cca9490371d4433bae41fb95cbc8d2d2/FLAG8a1f06299 [2021-11-25 18:46:55,428 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:46:55,429 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1640bdb6-0a05-493a-94e9-357bef168c89/sv-benchmarks/c/product-lines/elevator_spec3_product23.cil.c [2021-11-25 18:46:55,466 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1640bdb6-0a05-493a-94e9-357bef168c89/bin/utaipan-eEHZpOm5b7/data/c073fc4f2/cca9490371d4433bae41fb95cbc8d2d2/FLAG8a1f06299 [2021-11-25 18:46:55,621 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1640bdb6-0a05-493a-94e9-357bef168c89/bin/utaipan-eEHZpOm5b7/data/c073fc4f2/cca9490371d4433bae41fb95cbc8d2d2 [2021-11-25 18:46:55,623 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:46:55,624 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:46:55,638 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:46:55,639 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:46:55,642 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:46:55,643 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:46:55" (1/1) ... [2021-11-25 18:46:55,644 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cdccbb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:46:55, skipping insertion in model container [2021-11-25 18:46:55,645 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:46:55" (1/1) ... [2021-11-25 18:46:55,652 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:46:55,741 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:46:55,970 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_1640bdb6-0a05-493a-94e9-357bef168c89/sv-benchmarks/c/product-lines/elevator_spec3_product23.cil.c[5798,5811] [2021-11-25 18:46:56,384 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:46:56,398 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:46:56,424 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_1640bdb6-0a05-493a-94e9-357bef168c89/sv-benchmarks/c/product-lines/elevator_spec3_product23.cil.c[5798,5811] [2021-11-25 18:46:56,514 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:46:56,544 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:46:56,545 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:46:56 WrapperNode [2021-11-25 18:46:56,545 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:46:56,546 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:46:56,546 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:46:56,546 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:46:56,555 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:46:56" (1/1) ... [2021-11-25 18:46:56,617 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:46:56" (1/1) ... [2021-11-25 18:46:56,694 INFO L137 Inliner]: procedures = 94, calls = 353, calls flagged for inlining = 25, calls inlined = 22, statements flattened = 945 [2021-11-25 18:46:56,694 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:46:56,697 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:46:56,698 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:46:56,698 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:46:56,707 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:46:56" (1/1) ... [2021-11-25 18:46:56,707 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:46:56" (1/1) ... [2021-11-25 18:46:56,732 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:46:56" (1/1) ... [2021-11-25 18:46:56,739 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:46:56" (1/1) ... [2021-11-25 18:46:56,809 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:46:56" (1/1) ... [2021-11-25 18:46:56,866 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:46:56" (1/1) ... [2021-11-25 18:46:56,889 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:46:56" (1/1) ... [2021-11-25 18:46:56,900 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:46:56,901 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:46:56,901 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:46:56,902 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:46:56,920 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:46:56" (1/1) ... [2021-11-25 18:46:56,930 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:46:56,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1640bdb6-0a05-493a-94e9-357bef168c89/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:46:56,963 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1640bdb6-0a05-493a-94e9-357bef168c89/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:46:56,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1640bdb6-0a05-493a-94e9-357bef168c89/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:46:57,011 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:46:57,012 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-11-25 18:46:57,012 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-11-25 18:46:57,012 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2021-11-25 18:46:57,012 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2021-11-25 18:46:57,012 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-25 18:46:57,012 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-25 18:46:57,012 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-25 18:46:57,013 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-25 18:46:57,013 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-25 18:46:57,013 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-25 18:46:57,013 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-25 18:46:57,013 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-25 18:46:57,013 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-25 18:46:57,013 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-25 18:46:57,013 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-25 18:46:57,014 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-25 18:46:57,014 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-25 18:46:57,014 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-25 18:46:57,014 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-25 18:46:57,014 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-25 18:46:57,014 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-25 18:46:57,014 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-25 18:46:57,015 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-25 18:46:57,015 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-25 18:46:57,015 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-25 18:46:57,015 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-25 18:46:57,015 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-25 18:46:57,015 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-25 18:46:57,015 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-25 18:46:57,016 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-25 18:46:57,016 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2021-11-25 18:46:57,016 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2021-11-25 18:46:57,016 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-25 18:46:57,016 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-25 18:46:57,016 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-25 18:46:57,016 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-25 18:46:57,017 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2021-11-25 18:46:57,017 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2021-11-25 18:46:57,017 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-25 18:46:57,017 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-25 18:46:57,017 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-25 18:46:57,017 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-25 18:46:57,018 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-25 18:46:57,018 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-25 18:46:57,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:46:57,019 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-25 18:46:57,020 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-25 18:46:57,020 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-25 18:46:57,021 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-25 18:46:57,022 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-25 18:46:57,022 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-25 18:46:57,022 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-25 18:46:57,023 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-25 18:46:57,023 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2021-11-25 18:46:57,023 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2021-11-25 18:46:57,023 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:46:57,024 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:46:57,024 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-25 18:46:57,024 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-25 18:46:57,276 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:46:57,278 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:46:58,439 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:46:59,130 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:46:59,130 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 18:46:59,135 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:46:59 BoogieIcfgContainer [2021-11-25 18:46:59,135 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:46:59,137 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:46:59,138 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:46:59,141 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:46:59,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:46:55" (1/3) ... [2021-11-25 18:46:59,142 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10e145ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:46:59, skipping insertion in model container [2021-11-25 18:46:59,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:46:56" (2/3) ... [2021-11-25 18:46:59,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10e145ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:46:59, skipping insertion in model container [2021-11-25 18:46:59,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:46:59" (3/3) ... [2021-11-25 18:46:59,145 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product23.cil.c [2021-11-25 18:46:59,151 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:46:59,151 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 18:46:59,214 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:46:59,223 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 18:46:59,224 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 18:46:59,256 INFO L276 IsEmpty]: Start isEmpty. Operand has 427 states, 284 states have (on average 1.556338028169014) internal successors, (442), 302 states have internal predecessors, (442), 113 states have call successors, (113), 28 states have call predecessors, (113), 28 states have return successors, (113), 110 states have call predecessors, (113), 113 states have call successors, (113) [2021-11-25 18:46:59,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-25 18:46:59,281 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:46:59,282 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:46:59,282 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:46:59,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:46:59,288 INFO L85 PathProgramCache]: Analyzing trace with hash 639967327, now seen corresponding path program 1 times [2021-11-25 18:46:59,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:46:59,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712810767] [2021-11-25 18:46:59,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:46:59,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:46:59,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:46:59,885 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 18:46:59,886 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:46:59,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712810767] [2021-11-25 18:46:59,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712810767] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:46:59,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917380778] [2021-11-25 18:46:59,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:46:59,888 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:46:59,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1640bdb6-0a05-493a-94e9-357bef168c89/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:46:59,895 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1640bdb6-0a05-493a-94e9-357bef168c89/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:46:59,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1640bdb6-0a05-493a-94e9-357bef168c89/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:47:00,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:47:00,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 1584 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 18:47:00,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:47:00,618 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 18:47:00,618 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:47:00,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917380778] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:47:00,619 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:47:00,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-25 18:47:00,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981479856] [2021-11-25 18:47:00,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:47:00,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:47:00,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:47:00,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:47:00,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:47:00,668 INFO L87 Difference]: Start difference. First operand has 427 states, 284 states have (on average 1.556338028169014) internal successors, (442), 302 states have internal predecessors, (442), 113 states have call successors, (113), 28 states have call predecessors, (113), 28 states have return successors, (113), 110 states have call predecessors, (113), 113 states have call successors, (113) Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-25 18:47:01,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:47:01,089 INFO L93 Difference]: Finished difference Result 1204 states and 1908 transitions. [2021-11-25 18:47:01,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:47:01,092 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 87 [2021-11-25 18:47:01,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:47:01,125 INFO L225 Difference]: With dead ends: 1204 [2021-11-25 18:47:01,126 INFO L226 Difference]: Without dead ends: 779 [2021-11-25 18:47:01,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:47:01,152 INFO L933 BasicCegarLoop]: 1130 mSDtfsCounter, 600 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 1665 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:47:01,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [600 Valid, 1665 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:47:01,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2021-11-25 18:47:01,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 767. [2021-11-25 18:47:01,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 767 states, 515 states have (on average 1.5475728155339805) internal successors, (797), 546 states have internal predecessors, (797), 201 states have call successors, (201), 51 states have call predecessors, (201), 50 states have return successors, (203), 195 states have call predecessors, (203), 198 states have call successors, (203) [2021-11-25 18:47:01,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 1201 transitions. [2021-11-25 18:47:01,342 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 1201 transitions. Word has length 87 [2021-11-25 18:47:01,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:47:01,343 INFO L470 AbstractCegarLoop]: Abstraction has 767 states and 1201 transitions. [2021-11-25 18:47:01,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-25 18:47:01,346 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 1201 transitions. [2021-11-25 18:47:01,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-25 18:47:01,363 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:47:01,363 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:47:01,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1640bdb6-0a05-493a-94e9-357bef168c89/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 18:47:01,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1640bdb6-0a05-493a-94e9-357bef168c89/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-25 18:47:01,584 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:47:01,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:47:01,586 INFO L85 PathProgramCache]: Analyzing trace with hash 820372113, now seen corresponding path program 1 times [2021-11-25 18:47:01,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:47:01,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784873515] [2021-11-25 18:47:01,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:47:01,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:47:01,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:47:01,845 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-25 18:47:01,846 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:47:01,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784873515] [2021-11-25 18:47:01,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784873515] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:47:01,851 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:47:01,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 18:47:01,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285164192] [2021-11-25 18:47:01,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:47:01,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:47:01,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:47:01,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:47:01,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:47:01,857 INFO L87 Difference]: Start difference. First operand 767 states and 1201 transitions. Second operand has 6 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-25 18:47:03,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:47:03,173 INFO L93 Difference]: Finished difference Result 2712 states and 4406 transitions. [2021-11-25 18:47:03,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 18:47:03,174 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) Word has length 88 [2021-11-25 18:47:03,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:47:03,199 INFO L225 Difference]: With dead ends: 2712 [2021-11-25 18:47:03,200 INFO L226 Difference]: Without dead ends: 1957 [2021-11-25 18:47:03,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-25 18:47:03,210 INFO L933 BasicCegarLoop]: 970 mSDtfsCounter, 867 mSDsluCounter, 3423 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 939 SdHoareTripleChecker+Valid, 4252 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:47:03,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [939 Valid, 4252 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 759 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-25 18:47:03,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1957 states. [2021-11-25 18:47:03,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1957 to 1431. [2021-11-25 18:47:03,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1431 states, 980 states have (on average 1.5561224489795917) internal successors, (1525), 1039 states have internal predecessors, (1525), 359 states have call successors, (359), 92 states have call predecessors, (359), 91 states have return successors, (392), 339 states have call predecessors, (392), 355 states have call successors, (392) [2021-11-25 18:47:03,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1431 states to 1431 states and 2276 transitions. [2021-11-25 18:47:03,396 INFO L78 Accepts]: Start accepts. Automaton has 1431 states and 2276 transitions. Word has length 88 [2021-11-25 18:47:03,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:47:03,397 INFO L470 AbstractCegarLoop]: Abstraction has 1431 states and 2276 transitions. [2021-11-25 18:47:03,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-25 18:47:03,397 INFO L276 IsEmpty]: Start isEmpty. Operand 1431 states and 2276 transitions. [2021-11-25 18:47:03,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-25 18:47:03,403 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:47:03,403 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:47:03,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 18:47:03,404 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:47:03,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:47:03,405 INFO L85 PathProgramCache]: Analyzing trace with hash -776535547, now seen corresponding path program 1 times [2021-11-25 18:47:03,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:47:03,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65499992] [2021-11-25 18:47:03,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:47:03,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:47:03,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:47:03,544 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 18:47:03,545 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:47:03,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65499992] [2021-11-25 18:47:03,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65499992] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:47:03,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186108021] [2021-11-25 18:47:03,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:47:03,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:47:03,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1640bdb6-0a05-493a-94e9-357bef168c89/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:47:03,554 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1640bdb6-0a05-493a-94e9-357bef168c89/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:47:03,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1640bdb6-0a05-493a-94e9-357bef168c89/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 18:47:03,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:47:03,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 1585 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 18:47:03,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:47:04,206 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 18:47:04,206 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:47:04,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186108021] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:47:04,207 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:47:04,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-25 18:47:04,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406597064] [2021-11-25 18:47:04,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:47:04,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:47:04,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:47:04,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:47:04,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:47:04,213 INFO L87 Difference]: Start difference. First operand 1431 states and 2276 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-25 18:47:04,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:47:04,522 INFO L93 Difference]: Finished difference Result 3526 states and 5679 transitions. [2021-11-25 18:47:04,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:47:04,523 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 88 [2021-11-25 18:47:04,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:47:04,552 INFO L225 Difference]: With dead ends: 3526 [2021-11-25 18:47:04,552 INFO L226 Difference]: Without dead ends: 2107 [2021-11-25 18:47:04,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:47:04,571 INFO L933 BasicCegarLoop]: 1113 mSDtfsCounter, 591 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 591 SdHoareTripleChecker+Valid, 1642 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:47:04,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [591 Valid, 1642 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:47:04,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2107 states. [2021-11-25 18:47:04,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2107 to 2062. [2021-11-25 18:47:04,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2062 states, 1418 states have (on average 1.5585331452750353) internal successors, (2210), 1506 states have internal predecessors, (2210), 512 states have call successors, (512), 130 states have call predecessors, (512), 131 states have return successors, (568), 485 states have call predecessors, (568), 508 states have call successors, (568) [2021-11-25 18:47:04,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 3290 transitions. [2021-11-25 18:47:04,742 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 3290 transitions. Word has length 88 [2021-11-25 18:47:04,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:47:04,744 INFO L470 AbstractCegarLoop]: Abstraction has 2062 states and 3290 transitions. [2021-11-25 18:47:04,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-25 18:47:04,748 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 3290 transitions. [2021-11-25 18:47:04,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-25 18:47:04,756 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:47:04,756 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:47:04,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1640bdb6-0a05-493a-94e9-357bef168c89/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 18:47:04,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1640bdb6-0a05-493a-94e9-357bef168c89/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:47:04,979 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:47:04,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:47:04,979 INFO L85 PathProgramCache]: Analyzing trace with hash -682660095, now seen corresponding path program 1 times [2021-11-25 18:47:04,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:47:04,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21113973] [2021-11-25 18:47:04,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:47:04,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:47:05,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:47:05,122 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 18:47:05,122 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:47:05,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21113973] [2021-11-25 18:47:05,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21113973] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:47:05,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223446788] [2021-11-25 18:47:05,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:47:05,123 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:47:05,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1640bdb6-0a05-493a-94e9-357bef168c89/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:47:05,124 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1640bdb6-0a05-493a-94e9-357bef168c89/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:47:05,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1640bdb6-0a05-493a-94e9-357bef168c89/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 18:47:05,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:47:05,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 1597 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 18:47:05,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:47:05,672 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 18:47:05,672 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:47:05,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223446788] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:47:05,673 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:47:05,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-25 18:47:05,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216746016] [2021-11-25 18:47:05,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:47:05,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:47:05,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:47:05,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:47:05,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:47:05,675 INFO L87 Difference]: Start difference. First operand 2062 states and 3290 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-25 18:47:05,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:47:05,967 INFO L93 Difference]: Finished difference Result 4563 states and 7418 transitions. [2021-11-25 18:47:05,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:47:05,968 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 89 [2021-11-25 18:47:05,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:47:05,993 INFO L225 Difference]: With dead ends: 4563 [2021-11-25 18:47:05,994 INFO L226 Difference]: Without dead ends: 2513 [2021-11-25 18:47:06,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:47:06,020 INFO L933 BasicCegarLoop]: 686 mSDtfsCounter, 104 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 1279 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:47:06,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 1279 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:47:06,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2513 states. [2021-11-25 18:47:06,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2513 to 2090. [2021-11-25 18:47:06,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2090 states, 1442 states have (on average 1.552011095700416) internal successors, (2238), 1530 states have internal predecessors, (2238), 516 states have call successors, (516), 130 states have call predecessors, (516), 131 states have return successors, (572), 489 states have call predecessors, (572), 512 states have call successors, (572) [2021-11-25 18:47:06,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2090 states to 2090 states and 3326 transitions. [2021-11-25 18:47:06,228 INFO L78 Accepts]: Start accepts. Automaton has 2090 states and 3326 transitions. Word has length 89 [2021-11-25 18:47:06,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:47:06,230 INFO L470 AbstractCegarLoop]: Abstraction has 2090 states and 3326 transitions. [2021-11-25 18:47:06,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-25 18:47:06,231 INFO L276 IsEmpty]: Start isEmpty. Operand 2090 states and 3326 transitions. [2021-11-25 18:47:06,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-25 18:47:06,237 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:47:06,237 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:47:06,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1640bdb6-0a05-493a-94e9-357bef168c89/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 18:47:06,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1640bdb6-0a05-493a-94e9-357bef168c89/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:47:06,452 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:47:06,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:47:06,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1008596775, now seen corresponding path program 1 times [2021-11-25 18:47:06,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:47:06,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372128081] [2021-11-25 18:47:06,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:47:06,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:47:06,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:47:06,565 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-25 18:47:06,565 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:47:06,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372128081] [2021-11-25 18:47:06,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372128081] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:47:06,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734824516] [2021-11-25 18:47:06,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:47:06,567 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:47:06,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1640bdb6-0a05-493a-94e9-357bef168c89/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:47:06,568 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1640bdb6-0a05-493a-94e9-357bef168c89/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:47:06,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1640bdb6-0a05-493a-94e9-357bef168c89/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 18:47:06,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:47:06,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 1598 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 18:47:06,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:47:07,202 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 18:47:07,202 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:47:07,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734824516] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:47:07,203 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:47:07,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-11-25 18:47:07,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975662223] [2021-11-25 18:47:07,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:47:07,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:47:07,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:47:07,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:47:07,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-25 18:47:07,205 INFO L87 Difference]: Start difference. First operand 2090 states and 3326 transitions. Second operand has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-25 18:47:08,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:47:08,487 INFO L93 Difference]: Finished difference Result 6048 states and 9920 transitions. [2021-11-25 18:47:08,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:47:08,488 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 89 [2021-11-25 18:47:08,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:47:08,528 INFO L225 Difference]: With dead ends: 6048 [2021-11-25 18:47:08,528 INFO L226 Difference]: Without dead ends: 3970 [2021-11-25 18:47:08,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-25 18:47:08,563 INFO L933 BasicCegarLoop]: 734 mSDtfsCounter, 662 mSDsluCounter, 2525 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 722 SdHoareTripleChecker+Valid, 3124 SdHoareTripleChecker+Invalid, 924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-25 18:47:08,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [722 Valid, 3124 Invalid, 924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-25 18:47:08,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3970 states. [2021-11-25 18:47:08,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3970 to 3942. [2021-11-25 18:47:08,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3942 states, 2633 states have (on average 1.4899354348651728) internal successors, (3923), 2854 states have internal predecessors, (3923), 1077 states have call successors, (1077), 232 states have call predecessors, (1077), 231 states have return successors, (1271), 991 states have call predecessors, (1271), 1071 states have call successors, (1271) [2021-11-25 18:47:08,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3942 states to 3942 states and 6271 transitions. [2021-11-25 18:47:08,918 INFO L78 Accepts]: Start accepts. Automaton has 3942 states and 6271 transitions. Word has length 89 [2021-11-25 18:47:08,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:47:08,919 INFO L470 AbstractCegarLoop]: Abstraction has 3942 states and 6271 transitions. [2021-11-25 18:47:08,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-25 18:47:08,919 INFO L276 IsEmpty]: Start isEmpty. Operand 3942 states and 6271 transitions. [2021-11-25 18:47:08,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-25 18:47:08,923 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:47:08,923 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:47:08,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1640bdb6-0a05-493a-94e9-357bef168c89/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 18:47:09,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1640bdb6-0a05-493a-94e9-357bef168c89/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:47:09,144 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:47:09,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:47:09,144 INFO L85 PathProgramCache]: Analyzing trace with hash 422903505, now seen corresponding path program 1 times [2021-11-25 18:47:09,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:47:09,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671174013] [2021-11-25 18:47:09,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:47:09,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:47:09,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:47:09,345 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-25 18:47:09,345 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:47:09,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671174013] [2021-11-25 18:47:09,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671174013] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:47:09,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464140811] [2021-11-25 18:47:09,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:47:09,346 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:47:09,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1640bdb6-0a05-493a-94e9-357bef168c89/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:47:09,348 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1640bdb6-0a05-493a-94e9-357bef168c89/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:47:09,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1640bdb6-0a05-493a-94e9-357bef168c89/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 18:47:09,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:47:09,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 1612 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-25 18:47:09,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:47:10,137 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 18:47:10,137 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:47:10,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464140811] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:47:10,138 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:47:10,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 15 [2021-11-25 18:47:10,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348850467] [2021-11-25 18:47:10,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:47:10,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:47:10,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:47:10,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:47:10,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-11-25 18:47:10,141 INFO L87 Difference]: Start difference. First operand 3942 states and 6271 transitions. Second operand has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-25 18:47:12,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:47:12,659 INFO L93 Difference]: Finished difference Result 9702 states and 15771 transitions. [2021-11-25 18:47:12,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 18:47:12,660 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 94 [2021-11-25 18:47:12,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:47:12,729 INFO L225 Difference]: With dead ends: 9702 [2021-11-25 18:47:12,730 INFO L226 Difference]: Without dead ends: 5772 [2021-11-25 18:47:12,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-11-25 18:47:12,773 INFO L933 BasicCegarLoop]: 854 mSDtfsCounter, 1673 mSDsluCounter, 1723 mSDsCounter, 0 mSdLazyCounter, 2135 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1730 SdHoareTripleChecker+Valid, 2437 SdHoareTripleChecker+Invalid, 2417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 2135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-25 18:47:12,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1730 Valid, 2437 Invalid, 2417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 2135 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-25 18:47:12,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5772 states. [2021-11-25 18:47:13,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5772 to 4326. [2021-11-25 18:47:13,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4326 states, 2917 states have (on average 1.4730887898525882) internal successors, (4297), 3146 states have internal predecessors, (4297), 1149 states have call successors, (1149), 264 states have call predecessors, (1149), 259 states have return successors, (1351), 1051 states have call predecessors, (1351), 1143 states have call successors, (1351) [2021-11-25 18:47:13,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4326 states to 4326 states and 6797 transitions. [2021-11-25 18:47:13,237 INFO L78 Accepts]: Start accepts. Automaton has 4326 states and 6797 transitions. Word has length 94 [2021-11-25 18:47:13,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:47:13,238 INFO L470 AbstractCegarLoop]: Abstraction has 4326 states and 6797 transitions. [2021-11-25 18:47:13,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-25 18:47:13,238 INFO L276 IsEmpty]: Start isEmpty. Operand 4326 states and 6797 transitions. [2021-11-25 18:47:13,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-25 18:47:13,243 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:47:13,243 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:47:13,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1640bdb6-0a05-493a-94e9-357bef168c89/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 18:47:13,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1640bdb6-0a05-493a-94e9-357bef168c89/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:47:13,457 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:47:13,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:47:13,458 INFO L85 PathProgramCache]: Analyzing trace with hash -822838838, now seen corresponding path program 1 times [2021-11-25 18:47:13,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:47:13,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918176355] [2021-11-25 18:47:13,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:47:13,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:47:13,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:47:13,659 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-25 18:47:13,659 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:47:13,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918176355] [2021-11-25 18:47:13,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918176355] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:47:13,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701639133] [2021-11-25 18:47:13,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:47:13,660 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:47:13,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1640bdb6-0a05-493a-94e9-357bef168c89/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:47:13,667 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1640bdb6-0a05-493a-94e9-357bef168c89/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:47:13,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1640bdb6-0a05-493a-94e9-357bef168c89/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 18:47:13,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:47:13,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 1636 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 18:47:13,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:47:14,268 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 18:47:14,268 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:47:14,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701639133] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:47:14,269 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:47:14,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2021-11-25 18:47:14,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648989788] [2021-11-25 18:47:14,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:47:14,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:47:14,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:47:14,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:47:14,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-11-25 18:47:14,272 INFO L87 Difference]: Start difference. First operand 4326 states and 6797 transitions. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 6 states have internal predecessors, (59), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-25 18:47:15,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:47:15,001 INFO L93 Difference]: Finished difference Result 8963 states and 14386 transitions. [2021-11-25 18:47:15,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:47:15,002 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 6 states have internal predecessors, (59), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) Word has length 101 [2021-11-25 18:47:15,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:47:15,059 INFO L225 Difference]: With dead ends: 8963 [2021-11-25 18:47:15,059 INFO L226 Difference]: Without dead ends: 5502 [2021-11-25 18:47:15,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-11-25 18:47:15,086 INFO L933 BasicCegarLoop]: 680 mSDtfsCounter, 141 mSDsluCounter, 3472 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 3961 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:47:15,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 3961 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 18:47:15,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5502 states. [2021-11-25 18:47:15,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5502 to 4560. [2021-11-25 18:47:15,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4560 states, 3079 states have (on average 1.4670347515427087) internal successors, (4517), 3329 states have internal predecessors, (4517), 1208 states have call successors, (1208), 264 states have call predecessors, (1208), 272 states have return successors, (1450), 1120 states have call predecessors, (1450), 1202 states have call successors, (1450) [2021-11-25 18:47:15,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4560 states to 4560 states and 7175 transitions. [2021-11-25 18:47:15,579 INFO L78 Accepts]: Start accepts. Automaton has 4560 states and 7175 transitions. Word has length 101 [2021-11-25 18:47:15,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:47:15,579 INFO L470 AbstractCegarLoop]: Abstraction has 4560 states and 7175 transitions. [2021-11-25 18:47:15,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 6 states have internal predecessors, (59), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-25 18:47:15,581 INFO L276 IsEmpty]: Start isEmpty. Operand 4560 states and 7175 transitions. [2021-11-25 18:47:15,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-25 18:47:15,586 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:47:15,587 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:47:15,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1640bdb6-0a05-493a-94e9-357bef168c89/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 18:47:15,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1640bdb6-0a05-493a-94e9-357bef168c89/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:47:15,798 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:47:15,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:47:15,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1079055354, now seen corresponding path program 1 times [2021-11-25 18:47:15,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:47:15,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120423403] [2021-11-25 18:47:15,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:47:15,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:47:15,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:47:16,005 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-25 18:47:16,005 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:47:16,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120423403] [2021-11-25 18:47:16,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120423403] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:47:16,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307783221] [2021-11-25 18:47:16,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:47:16,006 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:47:16,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1640bdb6-0a05-493a-94e9-357bef168c89/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:47:16,007 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1640bdb6-0a05-493a-94e9-357bef168c89/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:47:16,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1640bdb6-0a05-493a-94e9-357bef168c89/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 18:47:16,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:47:16,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 1642 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-25 18:47:16,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:47:16,741 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-25 18:47:16,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:47:17,135 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-25 18:47:17,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307783221] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-25 18:47:17,135 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:47:17,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 20 [2021-11-25 18:47:17,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052350606] [2021-11-25 18:47:17,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:47:17,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 18:47:17,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:47:17,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 18:47:17,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-11-25 18:47:17,138 INFO L87 Difference]: Start difference. First operand 4560 states and 7175 transitions. Second operand has 9 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 4 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-25 18:47:21,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:47:21,389 INFO L93 Difference]: Finished difference Result 12536 states and 21072 transitions. [2021-11-25 18:47:21,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-25 18:47:21,394 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 4 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) Word has length 103 [2021-11-25 18:47:21,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:47:21,561 INFO L225 Difference]: With dead ends: 12536 [2021-11-25 18:47:21,570 INFO L226 Difference]: Without dead ends: 9255 [2021-11-25 18:47:21,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2021-11-25 18:47:21,608 INFO L933 BasicCegarLoop]: 737 mSDtfsCounter, 2491 mSDsluCounter, 2882 mSDsCounter, 0 mSdLazyCounter, 2976 mSolverCounterSat, 1160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2585 SdHoareTripleChecker+Valid, 3471 SdHoareTripleChecker+Invalid, 4136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1160 IncrementalHoareTripleChecker+Valid, 2976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:47:21,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2585 Valid, 3471 Invalid, 4136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1160 Valid, 2976 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-11-25 18:47:21,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9255 states. [2021-11-25 18:47:22,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9255 to 8039. [2021-11-25 18:47:22,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8039 states, 5642 states have (on average 1.467741935483871) internal successors, (8281), 5926 states have internal predecessors, (8281), 1831 states have call successors, (1831), 524 states have call predecessors, (1831), 565 states have return successors, (2845), 1732 states have call predecessors, (2845), 1823 states have call successors, (2845) [2021-11-25 18:47:22,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8039 states to 8039 states and 12957 transitions. [2021-11-25 18:47:22,273 INFO L78 Accepts]: Start accepts. Automaton has 8039 states and 12957 transitions. Word has length 103 [2021-11-25 18:47:22,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:47:22,274 INFO L470 AbstractCegarLoop]: Abstraction has 8039 states and 12957 transitions. [2021-11-25 18:47:22,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 4 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-25 18:47:22,275 INFO L276 IsEmpty]: Start isEmpty. Operand 8039 states and 12957 transitions. [2021-11-25 18:47:22,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-25 18:47:22,280 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:47:22,281 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:47:22,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1640bdb6-0a05-493a-94e9-357bef168c89/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 18:47:22,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1640bdb6-0a05-493a-94e9-357bef168c89/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:47:22,507 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:47:22,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:47:22,507 INFO L85 PathProgramCache]: Analyzing trace with hash -637393868, now seen corresponding path program 1 times [2021-11-25 18:47:22,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:47:22,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140471578] [2021-11-25 18:47:22,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:47:22,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:47:22,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:47:22,704 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-25 18:47:22,704 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:47:22,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140471578] [2021-11-25 18:47:22,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140471578] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:47:22,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322375515] [2021-11-25 18:47:22,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:47:22,705 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:47:22,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1640bdb6-0a05-493a-94e9-357bef168c89/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:47:22,706 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1640bdb6-0a05-493a-94e9-357bef168c89/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:47:22,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1640bdb6-0a05-493a-94e9-357bef168c89/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 18:47:22,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:47:22,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 1659 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 18:47:22,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:47:23,349 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-25 18:47:23,349 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:47:23,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322375515] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:47:23,350 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:47:23,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2021-11-25 18:47:23,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105180410] [2021-11-25 18:47:23,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:47:23,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:47:23,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:47:23,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:47:23,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-11-25 18:47:23,356 INFO L87 Difference]: Start difference. First operand 8039 states and 12957 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 4 states have call successors, (22), 3 states have call predecessors, (22), 4 states have return successors, (20), 3 states have call predecessors, (20), 4 states have call successors, (20) [2021-11-25 18:47:24,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:47:24,466 INFO L93 Difference]: Finished difference Result 14813 states and 23958 transitions. [2021-11-25 18:47:24,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:47:24,466 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 4 states have call successors, (22), 3 states have call predecessors, (22), 4 states have return successors, (20), 3 states have call predecessors, (20), 4 states have call successors, (20) Word has length 107 [2021-11-25 18:47:24,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:47:24,536 INFO L225 Difference]: With dead ends: 14813 [2021-11-25 18:47:24,536 INFO L226 Difference]: Without dead ends: 8061 [2021-11-25 18:47:24,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-11-25 18:47:24,585 INFO L933 BasicCegarLoop]: 760 mSDtfsCounter, 448 mSDsluCounter, 2046 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 2694 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:47:24,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [448 Valid, 2694 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 18:47:24,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8061 states. [2021-11-25 18:47:25,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8061 to 8039. [2021-11-25 18:47:25,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8039 states, 5642 states have (on average 1.467741935483871) internal successors, (8281), 5926 states have internal predecessors, (8281), 1831 states have call successors, (1831), 524 states have call predecessors, (1831), 565 states have return successors, (2837), 1732 states have call predecessors, (2837), 1823 states have call successors, (2837) [2021-11-25 18:47:25,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8039 states to 8039 states and 12949 transitions. [2021-11-25 18:47:25,229 INFO L78 Accepts]: Start accepts. Automaton has 8039 states and 12949 transitions. Word has length 107 [2021-11-25 18:47:25,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:47:25,230 INFO L470 AbstractCegarLoop]: Abstraction has 8039 states and 12949 transitions. [2021-11-25 18:47:25,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 4 states have call successors, (22), 3 states have call predecessors, (22), 4 states have return successors, (20), 3 states have call predecessors, (20), 4 states have call successors, (20) [2021-11-25 18:47:25,230 INFO L276 IsEmpty]: Start isEmpty. Operand 8039 states and 12949 transitions. [2021-11-25 18:47:25,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-25 18:47:25,237 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:47:25,237 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:47:25,275 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1640bdb6-0a05-493a-94e9-357bef168c89/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-25 18:47:25,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1640bdb6-0a05-493a-94e9-357bef168c89/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:47:25,450 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:47:25,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:47:25,451 INFO L85 PathProgramCache]: Analyzing trace with hash -442084966, now seen corresponding path program 1 times [2021-11-25 18:47:25,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:47:25,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406979512] [2021-11-25 18:47:25,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:47:25,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:47:25,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:47:25,662 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-25 18:47:25,662 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:47:25,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406979512] [2021-11-25 18:47:25,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406979512] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:47:25,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71119706] [2021-11-25 18:47:25,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:47:25,663 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:47:25,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1640bdb6-0a05-493a-94e9-357bef168c89/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:47:25,667 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1640bdb6-0a05-493a-94e9-357bef168c89/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:47:25,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1640bdb6-0a05-493a-94e9-357bef168c89/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 18:47:26,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:47:26,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 1755 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-25 18:47:26,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:47:26,487 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-25 18:47:26,487 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:47:26,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71119706] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:47:26,488 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:47:26,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 11 [2021-11-25 18:47:26,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585286764] [2021-11-25 18:47:26,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:47:26,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:47:26,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:47:26,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:47:26,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-25 18:47:26,491 INFO L87 Difference]: Start difference. First operand 8039 states and 12949 transitions. Second operand has 6 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-25 18:47:28,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:47:28,672 INFO L93 Difference]: Finished difference Result 27069 states and 47241 transitions. [2021-11-25 18:47:28,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:47:28,673 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 134 [2021-11-25 18:47:28,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:47:28,841 INFO L225 Difference]: With dead ends: 27069 [2021-11-25 18:47:28,842 INFO L226 Difference]: Without dead ends: 19042 [2021-11-25 18:47:28,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-11-25 18:47:28,922 INFO L933 BasicCegarLoop]: 1018 mSDtfsCounter, 819 mSDsluCounter, 3265 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 888 SdHoareTripleChecker+Valid, 4139 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:47:28,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [888 Valid, 4139 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-25 18:47:28,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19042 states. [2021-11-25 18:47:30,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19042 to 15950. [2021-11-25 18:47:30,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15950 states, 11230 states have (on average 1.4647373107747106) internal successors, (16449), 11810 states have internal predecessors, (16449), 3637 states have call successors, (3637), 997 states have call predecessors, (3637), 1082 states have return successors, (6801), 3388 states have call predecessors, (6801), 3625 states have call successors, (6801) [2021-11-25 18:47:30,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15950 states to 15950 states and 26887 transitions. [2021-11-25 18:47:30,403 INFO L78 Accepts]: Start accepts. Automaton has 15950 states and 26887 transitions. Word has length 134 [2021-11-25 18:47:30,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:47:30,403 INFO L470 AbstractCegarLoop]: Abstraction has 15950 states and 26887 transitions. [2021-11-25 18:47:30,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-25 18:47:30,404 INFO L276 IsEmpty]: Start isEmpty. Operand 15950 states and 26887 transitions. [2021-11-25 18:47:30,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-25 18:47:30,411 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:47:30,411 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:47:30,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1640bdb6-0a05-493a-94e9-357bef168c89/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-25 18:47:30,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1640bdb6-0a05-493a-94e9-357bef168c89/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-25 18:47:30,638 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:47:30,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:47:30,639 INFO L85 PathProgramCache]: Analyzing trace with hash -2082900144, now seen corresponding path program 1 times [2021-11-25 18:47:30,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:47:30,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565145783] [2021-11-25 18:47:30,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:47:30,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:47:30,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:47:31,058 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-25 18:47:31,058 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:47:31,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565145783] [2021-11-25 18:47:31,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565145783] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:47:31,059 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:47:31,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-25 18:47:31,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434810618] [2021-11-25 18:47:31,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:47:31,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-25 18:47:31,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:47:31,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-25 18:47:31,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-11-25 18:47:31,060 INFO L87 Difference]: Start difference. First operand 15950 states and 26887 transitions. Second operand has 14 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 6 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (24), 7 states have call predecessors, (24), 5 states have call successors, (24) [2021-11-25 18:47:39,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:47:39,356 INFO L93 Difference]: Finished difference Result 60500 states and 109628 transitions. [2021-11-25 18:47:39,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-25 18:47:39,356 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 6 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (24), 7 states have call predecessors, (24), 5 states have call successors, (24) Word has length 140 [2021-11-25 18:47:39,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:47:39,820 INFO L225 Difference]: With dead ends: 60500 [2021-11-25 18:47:39,821 INFO L226 Difference]: Without dead ends: 44562 [2021-11-25 18:47:40,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=309, Invalid=1761, Unknown=0, NotChecked=0, Total=2070 [2021-11-25 18:47:40,216 INFO L933 BasicCegarLoop]: 803 mSDtfsCounter, 2855 mSDsluCounter, 4792 mSDsCounter, 0 mSdLazyCounter, 9017 mSolverCounterSat, 1289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2966 SdHoareTripleChecker+Valid, 5242 SdHoareTripleChecker+Invalid, 10306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1289 IncrementalHoareTripleChecker+Valid, 9017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:47:40,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2966 Valid, 5242 Invalid, 10306 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1289 Valid, 9017 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2021-11-25 18:47:40,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44562 states. [2021-11-25 18:47:43,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44562 to 39067. [2021-11-25 18:47:43,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39067 states, 28420 states have (on average 1.4686488388458832) internal successors, (41739), 29348 states have internal predecessors, (41739), 7556 states have call successors, (7556), 2813 states have call predecessors, (7556), 3090 states have return successors, (18377), 7331 states have call predecessors, (18377), 7536 states have call successors, (18377) [2021-11-25 18:47:44,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39067 states to 39067 states and 67672 transitions. [2021-11-25 18:47:44,286 INFO L78 Accepts]: Start accepts. Automaton has 39067 states and 67672 transitions. Word has length 140 [2021-11-25 18:47:44,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:47:44,292 INFO L470 AbstractCegarLoop]: Abstraction has 39067 states and 67672 transitions. [2021-11-25 18:47:44,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 6 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (24), 7 states have call predecessors, (24), 5 states have call successors, (24) [2021-11-25 18:47:44,292 INFO L276 IsEmpty]: Start isEmpty. Operand 39067 states and 67672 transitions. [2021-11-25 18:47:44,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-11-25 18:47:44,307 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:47:44,307 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:47:44,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-25 18:47:44,307 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:47:44,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:47:44,308 INFO L85 PathProgramCache]: Analyzing trace with hash 113785449, now seen corresponding path program 1 times [2021-11-25 18:47:44,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:47:44,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351276865] [2021-11-25 18:47:44,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:47:44,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:47:44,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:47:44,436 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-25 18:47:44,436 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:47:44,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351276865] [2021-11-25 18:47:44,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351276865] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:47:44,437 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:47:44,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:47:44,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272912755] [2021-11-25 18:47:44,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:47:44,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:47:44,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:47:44,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:47:44,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:47:44,439 INFO L87 Difference]: Start difference. First operand 39067 states and 67672 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-25 18:47:48,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:47:48,234 INFO L93 Difference]: Finished difference Result 91217 states and 159810 transitions. [2021-11-25 18:47:48,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:47:48,235 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 173 [2021-11-25 18:47:48,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:47:49,034 INFO L225 Difference]: With dead ends: 91217 [2021-11-25 18:47:49,034 INFO L226 Difference]: Without dead ends: 52162 [2021-11-25 18:47:49,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:47:49,257 INFO L933 BasicCegarLoop]: 833 mSDtfsCounter, 551 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 551 SdHoareTripleChecker+Valid, 1436 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:47:49,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [551 Valid, 1436 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:47:49,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52162 states. [2021-11-25 18:47:52,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52162 to 51793. [2021-11-25 18:47:52,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51793 states, 37713 states have (on average 1.4690690212923925) internal successors, (55403), 38959 states have internal predecessors, (55403), 9970 states have call successors, (9970), 3722 states have call predecessors, (9970), 4109 states have return successors, (24445), 9681 states have call predecessors, (24445), 9950 states have call successors, (24445) [2021-11-25 18:47:53,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51793 states to 51793 states and 89818 transitions. [2021-11-25 18:47:53,435 INFO L78 Accepts]: Start accepts. Automaton has 51793 states and 89818 transitions. Word has length 173 [2021-11-25 18:47:53,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:47:53,438 INFO L470 AbstractCegarLoop]: Abstraction has 51793 states and 89818 transitions. [2021-11-25 18:47:53,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-25 18:47:53,438 INFO L276 IsEmpty]: Start isEmpty. Operand 51793 states and 89818 transitions. [2021-11-25 18:47:53,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-25 18:47:53,469 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:47:53,470 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:47:53,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-25 18:47:53,470 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:47:53,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:47:53,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1461742194, now seen corresponding path program 1 times [2021-11-25 18:47:53,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:47:53,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794434703] [2021-11-25 18:47:53,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:47:53,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:47:53,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:47:53,641 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-11-25 18:47:53,641 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:47:53,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794434703] [2021-11-25 18:47:53,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794434703] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:47:53,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471901429] [2021-11-25 18:47:53,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:47:53,642 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:47:53,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1640bdb6-0a05-493a-94e9-357bef168c89/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:47:53,643 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1640bdb6-0a05-493a-94e9-357bef168c89/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:47:53,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1640bdb6-0a05-493a-94e9-357bef168c89/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-25 18:47:54,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:47:54,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 2072 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-25 18:47:54,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:47:54,347 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-25 18:47:54,347 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:47:54,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471901429] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:47:54,347 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:47:54,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 9 [2021-11-25 18:47:54,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459370675] [2021-11-25 18:47:54,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:47:54,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 18:47:54,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:47:54,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 18:47:54,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-25 18:47:54,349 INFO L87 Difference]: Start difference. First operand 51793 states and 89818 transitions. Second operand has 9 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 3 states have call successors, (34), 3 states have call predecessors, (34), 5 states have return successors, (32), 5 states have call predecessors, (32), 3 states have call successors, (32) [2021-11-25 18:48:00,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:48:00,404 INFO L93 Difference]: Finished difference Result 137899 states and 242135 transitions. [2021-11-25 18:48:00,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 18:48:00,405 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 3 states have call successors, (34), 3 states have call predecessors, (34), 5 states have return successors, (32), 5 states have call predecessors, (32), 3 states have call successors, (32) Word has length 178 [2021-11-25 18:48:00,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:48:01,378 INFO L225 Difference]: With dead ends: 137899 [2021-11-25 18:48:01,379 INFO L226 Difference]: Without dead ends: 89533 [2021-11-25 18:48:01,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-11-25 18:48:01,681 INFO L933 BasicCegarLoop]: 763 mSDtfsCounter, 731 mSDsluCounter, 4909 mSDsCounter, 0 mSdLazyCounter, 1361 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 792 SdHoareTripleChecker+Valid, 5402 SdHoareTripleChecker+Invalid, 1500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 1361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 18:48:01,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [792 Valid, 5402 Invalid, 1500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 1361 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-25 18:48:01,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89533 states. [2021-11-25 18:48:06,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89533 to 88121. [2021-11-25 18:48:06,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88121 states, 64217 states have (on average 1.471619664574801) internal successors, (94503), 66231 states have internal predecessors, (94503), 16990 states have call successors, (16990), 6314 states have call predecessors, (16990), 6913 states have return successors, (43051), 16505 states have call predecessors, (43051), 16954 states have call successors, (43051) [2021-11-25 18:48:07,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88121 states to 88121 states and 154544 transitions. [2021-11-25 18:48:07,904 INFO L78 Accepts]: Start accepts. Automaton has 88121 states and 154544 transitions. Word has length 178 [2021-11-25 18:48:07,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:48:07,905 INFO L470 AbstractCegarLoop]: Abstraction has 88121 states and 154544 transitions. [2021-11-25 18:48:07,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 3 states have call successors, (34), 3 states have call predecessors, (34), 5 states have return successors, (32), 5 states have call predecessors, (32), 3 states have call successors, (32) [2021-11-25 18:48:07,906 INFO L276 IsEmpty]: Start isEmpty. Operand 88121 states and 154544 transitions. [2021-11-25 18:48:07,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-25 18:48:07,932 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:48:07,933 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:48:07,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1640bdb6-0a05-493a-94e9-357bef168c89/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-25 18:48:08,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1640bdb6-0a05-493a-94e9-357bef168c89/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-25 18:48:08,158 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:48:08,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:48:08,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1475834593, now seen corresponding path program 1 times [2021-11-25 18:48:08,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:48:08,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626160543] [2021-11-25 18:48:08,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:48:08,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:48:08,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:48:08,346 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-25 18:48:08,346 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:48:08,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626160543] [2021-11-25 18:48:08,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626160543] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:48:08,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857279771] [2021-11-25 18:48:08,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:48:08,347 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:48:08,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1640bdb6-0a05-493a-94e9-357bef168c89/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:48:08,348 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1640bdb6-0a05-493a-94e9-357bef168c89/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:48:08,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1640bdb6-0a05-493a-94e9-357bef168c89/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-25 18:48:08,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:48:08,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 2073 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-25 18:48:08,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:48:09,081 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-25 18:48:09,081 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:48:09,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857279771] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:48:09,082 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:48:09,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 8 [2021-11-25 18:48:09,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646239422] [2021-11-25 18:48:09,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:48:09,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 18:48:09,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:48:09,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 18:48:09,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:48:09,086 INFO L87 Difference]: Start difference. First operand 88121 states and 154544 transitions. Second operand has 8 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 3 states have call successors, (32), 3 states have call predecessors, (32), 5 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) [2021-11-25 18:48:16,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:48:16,930 INFO L93 Difference]: Finished difference Result 183941 states and 323314 transitions. [2021-11-25 18:48:16,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 18:48:16,931 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 3 states have call successors, (32), 3 states have call predecessors, (32), 5 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) Word has length 180 [2021-11-25 18:48:16,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:48:18,122 INFO L225 Difference]: With dead ends: 183941 [2021-11-25 18:48:18,123 INFO L226 Difference]: Without dead ends: 99395 [2021-11-25 18:48:18,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-25 18:48:18,627 INFO L933 BasicCegarLoop]: 1097 mSDtfsCounter, 629 mSDsluCounter, 5005 mSDsCounter, 0 mSdLazyCounter, 1960 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 687 SdHoareTripleChecker+Valid, 5760 SdHoareTripleChecker+Invalid, 2092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 1960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:48:18,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [687 Valid, 5760 Invalid, 2092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 1960 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-25 18:48:18,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99395 states.