./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product30.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_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/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_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product30.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/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_a69ab2c8-5f67-4786-9605-6f629af40d3c/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 4fa4154afcc1fa94c570756c4d3485a9415aeef22801b46450f13cd61ecf8230 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:03:40,189 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:03:40,192 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:03:40,263 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:03:40,264 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:03:40,269 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:03:40,271 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:03:40,275 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:03:40,279 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:03:40,285 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:03:40,287 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:03:40,289 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:03:40,290 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:03:40,293 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:03:40,295 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:03:40,305 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:03:40,308 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:03:40,309 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:03:40,312 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:03:40,315 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:03:40,317 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:03:40,319 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:03:40,320 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:03:40,321 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:03:40,325 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:03:40,325 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:03:40,326 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:03:40,327 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:03:40,328 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:03:40,329 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:03:40,329 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:03:40,330 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:03:40,331 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:03:40,332 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:03:40,333 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:03:40,333 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:03:40,334 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:03:40,334 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:03:40,334 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:03:40,335 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:03:40,336 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:03:40,337 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 20:03:40,363 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:03:40,363 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:03:40,363 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:03:40,364 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:03:40,364 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:03:40,364 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:03:40,365 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:03:40,365 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:03:40,365 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:03:40,365 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 20:03:40,366 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:03:40,366 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:03:40,366 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 20:03:40,366 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 20:03:40,366 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:03:40,367 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 20:03:40,367 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 20:03:40,367 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 20:03:40,368 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:03:40,368 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 20:03:40,368 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:03:40,368 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 20:03:40,368 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:03:40,369 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 20:03:40,369 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:03:40,369 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 20:03:40,369 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 20:03:40,369 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 20:03:40,370 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:03:40,370 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 20:03:40,370 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:03:40,370 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:03:40,370 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:03:40,371 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:03:40,371 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:03:40,371 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 20:03:40,371 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 20:03:40,371 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 20:03:40,372 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 20:03:40,372 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:03:40,372 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:03:40,372 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_a69ab2c8-5f67-4786-9605-6f629af40d3c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4fa4154afcc1fa94c570756c4d3485a9415aeef22801b46450f13cd61ecf8230 [2021-11-25 20:03:40,704 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:03:40,738 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:03:40,743 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:03:40,744 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:03:40,745 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:03:40,747 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/product-lines/elevator_spec3_product30.cil.c [2021-11-25 20:03:40,811 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/data/6804a8217/c693db1864784ed1acb60acb74a3a3d2/FLAGf814939e4 [2021-11-25 20:03:41,640 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:03:41,640 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/sv-benchmarks/c/product-lines/elevator_spec3_product30.cil.c [2021-11-25 20:03:41,671 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/data/6804a8217/c693db1864784ed1acb60acb74a3a3d2/FLAGf814939e4 [2021-11-25 20:03:41,766 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/data/6804a8217/c693db1864784ed1acb60acb74a3a3d2 [2021-11-25 20:03:41,769 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:03:41,770 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:03:41,783 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:03:41,783 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:03:41,787 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:03:41,788 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:03:41" (1/1) ... [2021-11-25 20:03:41,790 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ca36776 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:03:41, skipping insertion in model container [2021-11-25 20:03:41,791 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:03:41" (1/1) ... [2021-11-25 20:03:41,798 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:03:41,868 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:03:42,285 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_a69ab2c8-5f67-4786-9605-6f629af40d3c/sv-benchmarks/c/product-lines/elevator_spec3_product30.cil.c[14523,14536] [2021-11-25 20:03:42,593 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:03:42,605 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:03:42,652 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_a69ab2c8-5f67-4786-9605-6f629af40d3c/sv-benchmarks/c/product-lines/elevator_spec3_product30.cil.c[14523,14536] [2021-11-25 20:03:42,744 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:03:42,775 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:03:42,776 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:03:42 WrapperNode [2021-11-25 20:03:42,776 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:03:42,777 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:03:42,777 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:03:42,778 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:03:42,785 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:03:42" (1/1) ... [2021-11-25 20:03:42,829 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:03:42" (1/1) ... [2021-11-25 20:03:42,910 INFO L137 Inliner]: procedures = 93, calls = 353, calls flagged for inlining = 28, calls inlined = 24, statements flattened = 949 [2021-11-25 20:03:42,910 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:03:42,911 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:03:42,911 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:03:42,912 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:03:42,921 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:03:42" (1/1) ... [2021-11-25 20:03:42,922 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:03:42" (1/1) ... [2021-11-25 20:03:42,941 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:03:42" (1/1) ... [2021-11-25 20:03:42,944 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:03:42" (1/1) ... [2021-11-25 20:03:42,983 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:03:42" (1/1) ... [2021-11-25 20:03:43,026 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:03:42" (1/1) ... [2021-11-25 20:03:43,064 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:03:42" (1/1) ... [2021-11-25 20:03:43,079 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:03:43,084 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:03:43,085 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:03:43,085 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:03:43,086 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:03:42" (1/1) ... [2021-11-25 20:03:43,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:03:43,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:03:43,124 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:03:43,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:03:43,205 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:03:43,205 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2021-11-25 20:03:43,205 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2021-11-25 20:03:43,205 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-25 20:03:43,205 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-25 20:03:43,206 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-25 20:03:43,206 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-25 20:03:43,206 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-25 20:03:43,207 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-25 20:03:43,207 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-25 20:03:43,207 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-25 20:03:43,207 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-25 20:03:43,207 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-25 20:03:43,207 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2021-11-25 20:03:43,208 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2021-11-25 20:03:43,208 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-25 20:03:43,208 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-25 20:03:43,208 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-25 20:03:43,208 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-25 20:03:43,209 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-25 20:03:43,209 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-25 20:03:43,209 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-25 20:03:43,209 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-25 20:03:43,209 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-25 20:03:43,210 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-25 20:03:43,210 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-25 20:03:43,210 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-25 20:03:43,210 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-25 20:03:43,210 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-25 20:03:43,211 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2021-11-25 20:03:43,211 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2021-11-25 20:03:43,211 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-25 20:03:43,211 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-25 20:03:43,211 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2021-11-25 20:03:43,212 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2021-11-25 20:03:43,212 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-25 20:03:43,212 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-25 20:03:43,212 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-25 20:03:43,213 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-25 20:03:43,213 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-25 20:03:43,213 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-25 20:03:43,213 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-25 20:03:43,213 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-25 20:03:43,214 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 20:03:43,214 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-25 20:03:43,214 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-25 20:03:43,215 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-25 20:03:43,216 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-25 20:03:43,216 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-25 20:03:43,217 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-25 20:03:43,217 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-25 20:03:43,217 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-25 20:03:43,217 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__twothirdsfull [2021-11-25 20:03:43,218 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__twothirdsfull [2021-11-25 20:03:43,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:03:43,218 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:03:43,219 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-25 20:03:43,219 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-25 20:03:43,413 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:03:43,416 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:03:44,812 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:03:45,496 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:03:45,501 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 20:03:45,506 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:03:45 BoogieIcfgContainer [2021-11-25 20:03:45,508 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:03:45,511 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:03:45,512 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:03:45,517 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:03:45,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:03:41" (1/3) ... [2021-11-25 20:03:45,519 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@550a7ad3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:03:45, skipping insertion in model container [2021-11-25 20:03:45,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:03:42" (2/3) ... [2021-11-25 20:03:45,519 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@550a7ad3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:03:45, skipping insertion in model container [2021-11-25 20:03:45,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:03:45" (3/3) ... [2021-11-25 20:03:45,522 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product30.cil.c [2021-11-25 20:03:45,528 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:03:45,528 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 20:03:45,649 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:03:45,657 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 20:03:45,657 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 20:03:45,698 INFO L276 IsEmpty]: Start isEmpty. Operand has 411 states, 274 states have (on average 1.572992700729927) internal successors, (431), 294 states have internal predecessors, (431), 108 states have call successors, (108), 27 states have call predecessors, (108), 27 states have return successors, (108), 104 states have call predecessors, (108), 108 states have call successors, (108) [2021-11-25 20:03:45,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-25 20:03:45,718 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:03:45,719 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:03:45,720 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:03:45,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:03:45,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1811851757, now seen corresponding path program 1 times [2021-11-25 20:03:45,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:03:45,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335036226] [2021-11-25 20:03:45,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:03:45,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:03:46,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:03:46,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 20:03:46,443 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:03:46,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335036226] [2021-11-25 20:03:46,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335036226] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:03:46,445 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:03:46,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 20:03:46,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335485359] [2021-11-25 20:03:46,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:03:46,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:03:46,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:03:46,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:03:46,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:03:46,502 INFO L87 Difference]: Start difference. First operand has 411 states, 274 states have (on average 1.572992700729927) internal successors, (431), 294 states have internal predecessors, (431), 108 states have call successors, (108), 27 states have call predecessors, (108), 27 states have return successors, (108), 104 states have call predecessors, (108), 108 states have call successors, (108) Second operand has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 4 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-25 20:03:47,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:03:47,843 INFO L93 Difference]: Finished difference Result 1171 states and 1873 transitions. [2021-11-25 20:03:47,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 20:03:47,846 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 4 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 49 [2021-11-25 20:03:47,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:03:47,875 INFO L225 Difference]: With dead ends: 1171 [2021-11-25 20:03:47,875 INFO L226 Difference]: Without dead ends: 762 [2021-11-25 20:03:47,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 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 20:03:47,891 INFO L933 BasicCegarLoop]: 701 mSDtfsCounter, 544 mSDsluCounter, 2581 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 548 SdHoareTripleChecker+Valid, 3128 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-25 20:03:47,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [548 Valid, 3128 Invalid, 740 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [54 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-25 20:03:47,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-11-25 20:03:48,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 754. [2021-11-25 20:03:48,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 505 states have (on average 1.500990099009901) internal successors, (758), 539 states have internal predecessors, (758), 200 states have call successors, (200), 51 states have call predecessors, (200), 48 states have return successors, (203), 190 states have call predecessors, (203), 196 states have call successors, (203) [2021-11-25 20:03:48,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1161 transitions. [2021-11-25 20:03:48,044 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1161 transitions. Word has length 49 [2021-11-25 20:03:48,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:03:48,045 INFO L470 AbstractCegarLoop]: Abstraction has 754 states and 1161 transitions. [2021-11-25 20:03:48,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 4 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-25 20:03:48,046 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1161 transitions. [2021-11-25 20:03:48,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-25 20:03:48,050 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:03:48,050 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:03:48,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 20:03:48,051 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:03:48,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:03:48,052 INFO L85 PathProgramCache]: Analyzing trace with hash -449226594, now seen corresponding path program 1 times [2021-11-25 20:03:48,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:03:48,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941664867] [2021-11-25 20:03:48,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:03:48,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:03:48,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:03:48,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 20:03:48,225 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:03:48,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941664867] [2021-11-25 20:03:48,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941664867] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:03:48,226 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:03:48,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:03:48,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002377769] [2021-11-25 20:03:48,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:03:48,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:03:48,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:03:48,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:03:48,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:03:48,229 INFO L87 Difference]: Start difference. First operand 754 states and 1161 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-25 20:03:48,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:03:48,515 INFO L93 Difference]: Finished difference Result 2232 states and 3471 transitions. [2021-11-25 20:03:48,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:03:48,516 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 50 [2021-11-25 20:03:48,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:03:48,531 INFO L225 Difference]: With dead ends: 2232 [2021-11-25 20:03:48,531 INFO L226 Difference]: Without dead ends: 1491 [2021-11-25 20:03:48,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 20:03:48,538 INFO L933 BasicCegarLoop]: 702 mSDtfsCounter, 602 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 1283 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:03:48,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [602 Valid, 1283 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:03:48,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1491 states. [2021-11-25 20:03:48,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1491 to 1419. [2021-11-25 20:03:48,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1419 states, 979 states have (on average 1.5148110316649643) internal successors, (1483), 1031 states have internal predecessors, (1483), 353 states have call successors, (353), 91 states have call predecessors, (353), 86 states have return successors, (373), 324 states have call predecessors, (373), 347 states have call successors, (373) [2021-11-25 20:03:48,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1419 states to 1419 states and 2209 transitions. [2021-11-25 20:03:48,700 INFO L78 Accepts]: Start accepts. Automaton has 1419 states and 2209 transitions. Word has length 50 [2021-11-25 20:03:48,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:03:48,700 INFO L470 AbstractCegarLoop]: Abstraction has 1419 states and 2209 transitions. [2021-11-25 20:03:48,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-25 20:03:48,701 INFO L276 IsEmpty]: Start isEmpty. Operand 1419 states and 2209 transitions. [2021-11-25 20:03:48,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-25 20:03:48,708 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:03:48,708 INFO L514 BasicCegarLoop]: trace histogram [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 20:03:48,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 20:03:48,709 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:03:48,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:03:48,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1957902370, now seen corresponding path program 1 times [2021-11-25 20:03:48,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:03:48,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771764501] [2021-11-25 20:03:48,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:03:48,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:03:48,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:03:48,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 20:03:48,869 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:03:48,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771764501] [2021-11-25 20:03:48,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771764501] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:03:48,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:03:48,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 20:03:48,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992534462] [2021-11-25 20:03:48,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:03:48,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:03:48,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:03:48,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:03:48,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:03:48,872 INFO L87 Difference]: Start difference. First operand 1419 states and 2209 transitions. Second operand has 6 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-25 20:03:49,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:03:49,814 INFO L93 Difference]: Finished difference Result 3701 states and 5970 transitions. [2021-11-25 20:03:49,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 20:03:49,815 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 86 [2021-11-25 20:03:49,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:03:49,838 INFO L225 Difference]: With dead ends: 3701 [2021-11-25 20:03:49,838 INFO L226 Difference]: Without dead ends: 2294 [2021-11-25 20:03:49,850 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 20:03:49,852 INFO L933 BasicCegarLoop]: 757 mSDtfsCounter, 674 mSDsluCounter, 2762 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 696 SdHoareTripleChecker+Valid, 3382 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 20:03:49,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [696 Valid, 3382 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 20:03:49,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2294 states. [2021-11-25 20:03:49,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2294 to 2080. [2021-11-25 20:03:49,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2080 states, 1439 states have (on average 1.507991660875608) internal successors, (2170), 1523 states have internal predecessors, (2170), 512 states have call successors, (512), 135 states have call predecessors, (512), 128 states have return successors, (581), 464 states have call predecessors, (581), 504 states have call successors, (581) [2021-11-25 20:03:50,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2080 states to 2080 states and 3263 transitions. [2021-11-25 20:03:50,011 INFO L78 Accepts]: Start accepts. Automaton has 2080 states and 3263 transitions. Word has length 86 [2021-11-25 20:03:50,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:03:50,011 INFO L470 AbstractCegarLoop]: Abstraction has 2080 states and 3263 transitions. [2021-11-25 20:03:50,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-25 20:03:50,012 INFO L276 IsEmpty]: Start isEmpty. Operand 2080 states and 3263 transitions. [2021-11-25 20:03:50,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-25 20:03:50,016 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:03:50,016 INFO L514 BasicCegarLoop]: trace histogram [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 20:03:50,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 20:03:50,017 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:03:50,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:03:50,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1338439674, now seen corresponding path program 1 times [2021-11-25 20:03:50,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:03:50,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330214292] [2021-11-25 20:03:50,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:03:50,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:03:50,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:03:50,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 20:03:50,161 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:03:50,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330214292] [2021-11-25 20:03:50,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330214292] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:03:50,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495918587] [2021-11-25 20:03:50,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:03:50,163 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:03:50,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:03:50,176 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:03:50,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 20:03:50,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:03:50,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 1807 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 20:03:50,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:03:50,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:03:50,880 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:03:50,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495918587] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:03:50,881 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:03:50,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-25 20:03:50,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897392049] [2021-11-25 20:03:50,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:03:50,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:03:50,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:03:50,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:03:50,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:03:50,890 INFO L87 Difference]: Start difference. First operand 2080 states and 3263 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-25 20:03:51,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:03:51,291 INFO L93 Difference]: Finished difference Result 5950 states and 9595 transitions. [2021-11-25 20:03:51,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:03:51,292 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 86 [2021-11-25 20:03:51,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:03:51,351 INFO L225 Difference]: With dead ends: 5950 [2021-11-25 20:03:51,351 INFO L226 Difference]: Without dead ends: 3882 [2021-11-25 20:03:51,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 87 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 20:03:51,386 INFO L933 BasicCegarLoop]: 684 mSDtfsCounter, 565 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 1192 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:03:51,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [565 Valid, 1192 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:03:51,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3882 states. [2021-11-25 20:03:51,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3882 to 3764. [2021-11-25 20:03:51,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3764 states, 2621 states have (on average 1.5215566577642121) internal successors, (3988), 2791 states have internal predecessors, (3988), 903 states have call successors, (903), 240 states have call predecessors, (903), 239 states have return successors, (1072), 818 states have call predecessors, (1072), 895 states have call successors, (1072) [2021-11-25 20:03:51,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3764 states to 3764 states and 5963 transitions. [2021-11-25 20:03:51,758 INFO L78 Accepts]: Start accepts. Automaton has 3764 states and 5963 transitions. Word has length 86 [2021-11-25 20:03:51,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:03:51,759 INFO L470 AbstractCegarLoop]: Abstraction has 3764 states and 5963 transitions. [2021-11-25 20:03:51,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-25 20:03:51,759 INFO L276 IsEmpty]: Start isEmpty. Operand 3764 states and 5963 transitions. [2021-11-25 20:03:51,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-25 20:03:51,764 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:03:51,765 INFO L514 BasicCegarLoop]: trace histogram [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 20:03:51,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 20:03:51,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:03:51,979 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:03:51,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:03:51,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1391684584, now seen corresponding path program 1 times [2021-11-25 20:03:51,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:03:51,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026840960] [2021-11-25 20:03:51,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:03:51,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:03:52,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:03:52,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 20:03:52,121 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:03:52,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026840960] [2021-11-25 20:03:52,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026840960] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:03:52,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960925284] [2021-11-25 20:03:52,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:03:52,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:03:52,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:03:52,123 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:03:52,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 20:03:52,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:03:52,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 1807 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 20:03:52,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:03:52,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:03:52,781 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:03:52,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960925284] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:03:52,782 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:03:52,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-25 20:03:52,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661842568] [2021-11-25 20:03:52,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:03:52,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:03:52,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:03:52,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:03:52,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:03:52,784 INFO L87 Difference]: Start difference. First operand 3764 states and 5963 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-25 20:03:53,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:03:53,289 INFO L93 Difference]: Finished difference Result 8443 states and 13531 transitions. [2021-11-25 20:03:53,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:03:53,289 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 86 [2021-11-25 20:03:53,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:03:53,339 INFO L225 Difference]: With dead ends: 8443 [2021-11-25 20:03:53,339 INFO L226 Difference]: Without dead ends: 4691 [2021-11-25 20:03:53,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 87 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 20:03:53,373 INFO L933 BasicCegarLoop]: 728 mSDtfsCounter, 564 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 1233 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:03:53,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [564 Valid, 1233 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:03:53,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4691 states. [2021-11-25 20:03:53,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4691 to 4627. [2021-11-25 20:03:53,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4627 states, 3233 states have (on average 1.5310856789359728) internal successors, (4950), 3446 states have internal predecessors, (4950), 1100 states have call successors, (1100), 291 states have call predecessors, (1100), 293 states have return successors, (1306), 998 states have call predecessors, (1306), 1092 states have call successors, (1306) [2021-11-25 20:03:53,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4627 states to 4627 states and 7356 transitions. [2021-11-25 20:03:53,729 INFO L78 Accepts]: Start accepts. Automaton has 4627 states and 7356 transitions. Word has length 86 [2021-11-25 20:03:53,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:03:53,730 INFO L470 AbstractCegarLoop]: Abstraction has 4627 states and 7356 transitions. [2021-11-25 20:03:53,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-25 20:03:53,731 INFO L276 IsEmpty]: Start isEmpty. Operand 4627 states and 7356 transitions. [2021-11-25 20:03:53,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-25 20:03:53,736 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:03:53,737 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:03:53,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 20:03:53,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:03:53,956 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:03:53,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:03:53,956 INFO L85 PathProgramCache]: Analyzing trace with hash 936344970, now seen corresponding path program 1 times [2021-11-25 20:03:53,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:03:53,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150919984] [2021-11-25 20:03:53,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:03:53,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:03:54,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:03:54,216 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 20:03:54,216 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:03:54,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150919984] [2021-11-25 20:03:54,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150919984] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:03:54,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455430904] [2021-11-25 20:03:54,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:03:54,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:03:54,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:03:54,218 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:03:54,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 20:03:54,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:03:54,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 1834 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 20:03:54,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:03:54,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 20:03:54,958 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:03:54,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455430904] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:03:54,958 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:03:54,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 12 [2021-11-25 20:03:54,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996622084] [2021-11-25 20:03:54,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:03:54,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:03:54,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:03:54,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:03:54,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-25 20:03:54,960 INFO L87 Difference]: Start difference. First operand 4627 states and 7356 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 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 20:03:55,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:03:55,350 INFO L93 Difference]: Finished difference Result 10083 states and 16056 transitions. [2021-11-25 20:03:55,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:03:55,351 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 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 92 [2021-11-25 20:03:55,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:03:55,400 INFO L225 Difference]: With dead ends: 10083 [2021-11-25 20:03:55,400 INFO L226 Difference]: Without dead ends: 5468 [2021-11-25 20:03:55,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-11-25 20:03:55,436 INFO L933 BasicCegarLoop]: 711 mSDtfsCounter, 423 mSDsluCounter, 1147 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 1796 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:03:55,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [425 Valid, 1796 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:03:55,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5468 states. [2021-11-25 20:03:55,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5468 to 5355. [2021-11-25 20:03:55,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5355 states, 3739 states have (on average 1.4995988232147632) internal successors, (5607), 3950 states have internal predecessors, (5607), 1238 states have call successors, (1238), 354 states have call predecessors, (1238), 377 states have return successors, (1577), 1156 states have call predecessors, (1577), 1227 states have call successors, (1577) [2021-11-25 20:03:55,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5355 states to 5355 states and 8422 transitions. [2021-11-25 20:03:55,918 INFO L78 Accepts]: Start accepts. Automaton has 5355 states and 8422 transitions. Word has length 92 [2021-11-25 20:03:55,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:03:55,919 INFO L470 AbstractCegarLoop]: Abstraction has 5355 states and 8422 transitions. [2021-11-25 20:03:55,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 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 20:03:55,919 INFO L276 IsEmpty]: Start isEmpty. Operand 5355 states and 8422 transitions. [2021-11-25 20:03:55,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-25 20:03:55,925 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:03:55,925 INFO L514 BasicCegarLoop]: trace histogram [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 20:03:55,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 20:03:56,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:03:56,151 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:03:56,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:03:56,151 INFO L85 PathProgramCache]: Analyzing trace with hash -474812185, now seen corresponding path program 1 times [2021-11-25 20:03:56,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:03:56,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032649711] [2021-11-25 20:03:56,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:03:56,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:03:56,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:03:56,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 20:03:56,343 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:03:56,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032649711] [2021-11-25 20:03:56,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032649711] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:03:56,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349210954] [2021-11-25 20:03:56,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:03:56,344 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:03:56,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:03:56,345 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:03:56,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 20:03:56,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:03:56,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 1833 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 20:03:56,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:03:56,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 20:03:56,922 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:03:56,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349210954] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:03:56,923 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:03:56,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2021-11-25 20:03:56,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70944842] [2021-11-25 20:03:56,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:03:56,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:03:56,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:03:56,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:03:56,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-11-25 20:03:56,926 INFO L87 Difference]: Start difference. First operand 5355 states and 8422 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 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 20:03:57,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:03:57,637 INFO L93 Difference]: Finished difference Result 10563 states and 16976 transitions. [2021-11-25 20:03:57,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:03:57,638 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 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 93 [2021-11-25 20:03:57,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:03:57,716 INFO L225 Difference]: With dead ends: 10563 [2021-11-25 20:03:57,717 INFO L226 Difference]: Without dead ends: 6435 [2021-11-25 20:03:57,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-11-25 20:03:57,751 INFO L933 BasicCegarLoop]: 640 mSDtfsCounter, 177 mSDsluCounter, 1898 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 2426 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:03:57,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 2426 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:03:57,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6435 states. [2021-11-25 20:03:58,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6435 to 5400. [2021-11-25 20:03:58,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5400 states, 3784 states have (on average 1.4936575052854122) internal successors, (5652), 3995 states have internal predecessors, (5652), 1238 states have call successors, (1238), 354 states have call predecessors, (1238), 377 states have return successors, (1577), 1156 states have call predecessors, (1577), 1227 states have call successors, (1577) [2021-11-25 20:03:58,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5400 states to 5400 states and 8467 transitions. [2021-11-25 20:03:58,181 INFO L78 Accepts]: Start accepts. Automaton has 5400 states and 8467 transitions. Word has length 93 [2021-11-25 20:03:58,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:03:58,182 INFO L470 AbstractCegarLoop]: Abstraction has 5400 states and 8467 transitions. [2021-11-25 20:03:58,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 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 20:03:58,184 INFO L276 IsEmpty]: Start isEmpty. Operand 5400 states and 8467 transitions. [2021-11-25 20:03:58,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-25 20:03:58,188 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:03:58,189 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-11-25 20:03:58,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 20:03:58,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:03:58,415 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:03:58,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:03:58,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1470715232, now seen corresponding path program 1 times [2021-11-25 20:03:58,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:03:58,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418494484] [2021-11-25 20:03:58,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:03:58,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:03:58,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:03:58,671 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 20:03:58,672 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:03:58,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418494484] [2021-11-25 20:03:58,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418494484] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:03:58,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924992952] [2021-11-25 20:03:58,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:03:58,673 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:03:58,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:03:58,674 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:03:58,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 20:03:59,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:03:59,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 1840 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 20:03:59,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:03:59,434 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 20:03:59,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:04:00,169 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 20:04:00,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924992952] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-25 20:04:00,171 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-25 20:04:00,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 22 [2021-11-25 20:04:00,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934735591] [2021-11-25 20:04:00,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:04:00,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 20:04:00,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:04:00,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 20:04:00,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-11-25 20:04:00,174 INFO L87 Difference]: Start difference. First operand 5400 states and 8467 transitions. Second operand has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 7 states have call successors, (19), 4 states have call predecessors, (19), 5 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) [2021-11-25 20:04:02,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:04:02,695 INFO L93 Difference]: Finished difference Result 10625 states and 16858 transitions. [2021-11-25 20:04:02,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-25 20:04:02,696 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 7 states have call successors, (19), 4 states have call predecessors, (19), 5 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) Word has length 95 [2021-11-25 20:04:02,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:04:02,755 INFO L225 Difference]: With dead ends: 10625 [2021-11-25 20:04:02,755 INFO L226 Difference]: Without dead ends: 6476 [2021-11-25 20:04:02,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 178 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2021-11-25 20:04:02,779 INFO L933 BasicCegarLoop]: 744 mSDtfsCounter, 1254 mSDsluCounter, 1708 mSDsCounter, 0 mSdLazyCounter, 2060 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1340 SdHoareTripleChecker+Valid, 2314 SdHoareTripleChecker+Invalid, 2279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 2060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-25 20:04:02,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1340 Valid, 2314 Invalid, 2279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 2060 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-25 20:04:02,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6476 states. [2021-11-25 20:04:03,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6476 to 5601. [2021-11-25 20:04:03,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5601 states, 3908 states have (on average 1.4820880245649948) internal successors, (5792), 4119 states have internal predecessors, (5792), 1276 states have call successors, (1276), 360 states have call predecessors, (1276), 416 states have return successors, (1722), 1224 states have call predecessors, (1722), 1265 states have call successors, (1722) [2021-11-25 20:04:03,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5601 states to 5601 states and 8790 transitions. [2021-11-25 20:04:03,261 INFO L78 Accepts]: Start accepts. Automaton has 5601 states and 8790 transitions. Word has length 95 [2021-11-25 20:04:03,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:04:03,263 INFO L470 AbstractCegarLoop]: Abstraction has 5601 states and 8790 transitions. [2021-11-25 20:04:03,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 7 states have call successors, (19), 4 states have call predecessors, (19), 5 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) [2021-11-25 20:04:03,264 INFO L276 IsEmpty]: Start isEmpty. Operand 5601 states and 8790 transitions. [2021-11-25 20:04:03,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-25 20:04:03,271 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:04:03,271 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-11-25 20:04:03,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 20:04:03,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:04:03,499 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:04:03,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:04:03,499 INFO L85 PathProgramCache]: Analyzing trace with hash -50142079, now seen corresponding path program 1 times [2021-11-25 20:04:03,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:04:03,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319257362] [2021-11-25 20:04:03,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:04:03,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:04:03,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:04:03,717 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 20:04:03,717 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:04:03,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319257362] [2021-11-25 20:04:03,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319257362] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:04:03,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724299950] [2021-11-25 20:04:03,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:04:03,718 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:04:03,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:04:03,719 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:04:03,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 20:04:04,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:04:04,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 1838 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 20:04:04,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:04:04,413 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 20:04:04,413 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:04:04,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724299950] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:04:04,414 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:04:04,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2021-11-25 20:04:04,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612946305] [2021-11-25 20:04:04,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:04:04,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:04:04,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:04:04,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:04:04,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-25 20:04:04,417 INFO L87 Difference]: Start difference. First operand 5601 states and 8790 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-25 20:04:05,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:04:05,051 INFO L93 Difference]: Finished difference Result 10491 states and 16962 transitions. [2021-11-25 20:04:05,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:04:05,051 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 98 [2021-11-25 20:04:05,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:04:05,104 INFO L225 Difference]: With dead ends: 10491 [2021-11-25 20:04:05,104 INFO L226 Difference]: Without dead ends: 6141 [2021-11-25 20:04:05,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-11-25 20:04:05,148 INFO L933 BasicCegarLoop]: 639 mSDtfsCounter, 219 mSDsluCounter, 1056 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 1621 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:04:05,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 1621 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:04:05,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6141 states. [2021-11-25 20:04:05,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6141 to 6141. [2021-11-25 20:04:05,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6141 states, 4427 states have (on average 1.497854077253219) internal successors, (6631), 4659 states have internal predecessors, (6631), 1276 states have call successors, (1276), 360 states have call predecessors, (1276), 437 states have return successors, (1778), 1224 states have call predecessors, (1778), 1265 states have call successors, (1778) [2021-11-25 20:04:05,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6141 states to 6141 states and 9685 transitions. [2021-11-25 20:04:05,677 INFO L78 Accepts]: Start accepts. Automaton has 6141 states and 9685 transitions. Word has length 98 [2021-11-25 20:04:05,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:04:05,678 INFO L470 AbstractCegarLoop]: Abstraction has 6141 states and 9685 transitions. [2021-11-25 20:04:05,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-25 20:04:05,678 INFO L276 IsEmpty]: Start isEmpty. Operand 6141 states and 9685 transitions. [2021-11-25 20:04:05,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-25 20:04:05,684 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:04:05,684 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-11-25 20:04:05,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 20:04:05,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:04:05,899 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:04:05,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:04:05,899 INFO L85 PathProgramCache]: Analyzing trace with hash -559742525, now seen corresponding path program 1 times [2021-11-25 20:04:05,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:04:05,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714619833] [2021-11-25 20:04:05,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:04:05,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:04:05,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:04:06,128 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 20:04:06,129 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:04:06,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714619833] [2021-11-25 20:04:06,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714619833] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:04:06,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754999483] [2021-11-25 20:04:06,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:04:06,130 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:04:06,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:04:06,135 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:04:06,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 20:04:06,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:04:06,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 1839 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-25 20:04:06,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:04:06,998 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 20:04:06,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:04:07,600 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 20:04:07,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754999483] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-25 20:04:07,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-25 20:04:07,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10, 9] total 21 [2021-11-25 20:04:07,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942592397] [2021-11-25 20:04:07,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:04:07,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 20:04:07,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:04:07,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 20:04:07,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-11-25 20:04:07,603 INFO L87 Difference]: Start difference. First operand 6141 states and 9685 transitions. Second operand has 10 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 states have internal predecessors, (59), 5 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-25 20:04:12,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:04:12,234 INFO L93 Difference]: Finished difference Result 17742 states and 30849 transitions. [2021-11-25 20:04:12,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-25 20:04:12,235 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 states have internal predecessors, (59), 5 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) Word has length 98 [2021-11-25 20:04:12,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:04:12,342 INFO L225 Difference]: With dead ends: 17742 [2021-11-25 20:04:12,343 INFO L226 Difference]: Without dead ends: 13587 [2021-11-25 20:04:12,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=1136, Unknown=0, NotChecked=0, Total=1332 [2021-11-25 20:04:12,390 INFO L933 BasicCegarLoop]: 787 mSDtfsCounter, 4251 mSDsluCounter, 2703 mSDsCounter, 0 mSdLazyCounter, 2919 mSolverCounterSat, 2135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4350 SdHoareTripleChecker+Valid, 3317 SdHoareTripleChecker+Invalid, 5054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2135 IncrementalHoareTripleChecker+Valid, 2919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-11-25 20:04:12,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4350 Valid, 3317 Invalid, 5054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2135 Valid, 2919 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-11-25 20:04:12,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13587 states. [2021-11-25 20:04:13,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13587 to 12128. [2021-11-25 20:04:13,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12128 states, 8883 states have (on average 1.5074862096138693) internal successors, (13391), 9288 states have internal predecessors, (13391), 2354 states have call successors, (2354), 684 states have call predecessors, (2354), 890 states have return successors, (4235), 2315 states have call predecessors, (4235), 2337 states have call successors, (4235) [2021-11-25 20:04:13,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12128 states to 12128 states and 19980 transitions. [2021-11-25 20:04:13,627 INFO L78 Accepts]: Start accepts. Automaton has 12128 states and 19980 transitions. Word has length 98 [2021-11-25 20:04:13,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:04:13,628 INFO L470 AbstractCegarLoop]: Abstraction has 12128 states and 19980 transitions. [2021-11-25 20:04:13,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 states have internal predecessors, (59), 5 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-25 20:04:13,628 INFO L276 IsEmpty]: Start isEmpty. Operand 12128 states and 19980 transitions. [2021-11-25 20:04:13,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-25 20:04:13,633 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:04:13,634 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-11-25 20:04:13,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 20:04:13,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-25 20:04:13,859 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:04:13,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:04:13,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1284768084, now seen corresponding path program 1 times [2021-11-25 20:04:13,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:04:13,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514557215] [2021-11-25 20:04:13,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:04:13,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:04:13,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:04:14,055 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 20:04:14,055 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:04:14,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514557215] [2021-11-25 20:04:14,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514557215] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:04:14,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758853342] [2021-11-25 20:04:14,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:04:14,056 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:04:14,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:04:14,059 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:04:14,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 20:04:14,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:04:14,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 1855 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 20:04:14,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:04:14,621 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 20:04:14,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:04:15,029 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 20:04:15,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758853342] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-25 20:04:15,029 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-25 20:04:15,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 7] total 17 [2021-11-25 20:04:15,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66039734] [2021-11-25 20:04:15,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:04:15,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 20:04:15,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:04:15,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 20:04:15,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-11-25 20:04:15,032 INFO L87 Difference]: Start difference. First operand 12128 states and 19980 transitions. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 5 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) [2021-11-25 20:04:17,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:04:17,308 INFO L93 Difference]: Finished difference Result 23755 states and 39714 transitions. [2021-11-25 20:04:17,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 20:04:17,310 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 5 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) Word has length 101 [2021-11-25 20:04:17,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:04:17,419 INFO L225 Difference]: With dead ends: 23755 [2021-11-25 20:04:17,419 INFO L226 Difference]: Without dead ends: 13613 [2021-11-25 20:04:17,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 195 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-11-25 20:04:17,490 INFO L933 BasicCegarLoop]: 716 mSDtfsCounter, 1530 mSDsluCounter, 1123 mSDsCounter, 0 mSdLazyCounter, 1170 mSolverCounterSat, 470 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1626 SdHoareTripleChecker+Valid, 1771 SdHoareTripleChecker+Invalid, 1640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 470 IncrementalHoareTripleChecker+Valid, 1170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:04:17,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1626 Valid, 1771 Invalid, 1640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [470 Valid, 1170 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-25 20:04:17,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13613 states. [2021-11-25 20:04:18,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13613 to 12116. [2021-11-25 20:04:18,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12116 states, 8883 states have (on average 1.5074862096138693) internal successors, (13391), 9276 states have internal predecessors, (13391), 2342 states have call successors, (2342), 684 states have call predecessors, (2342), 890 states have return successors, (4199), 2315 states have call predecessors, (4199), 2325 states have call successors, (4199) [2021-11-25 20:04:18,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12116 states to 12116 states and 19932 transitions. [2021-11-25 20:04:18,675 INFO L78 Accepts]: Start accepts. Automaton has 12116 states and 19932 transitions. Word has length 101 [2021-11-25 20:04:18,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:04:18,676 INFO L470 AbstractCegarLoop]: Abstraction has 12116 states and 19932 transitions. [2021-11-25 20:04:18,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 5 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) [2021-11-25 20:04:18,677 INFO L276 IsEmpty]: Start isEmpty. Operand 12116 states and 19932 transitions. [2021-11-25 20:04:18,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-25 20:04:18,689 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:04:18,689 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:04:18,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 20:04:18,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-25 20:04:18,915 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:04:18,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:04:18,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1069538174, now seen corresponding path program 1 times [2021-11-25 20:04:18,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:04:18,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586579244] [2021-11-25 20:04:18,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:04:18,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:04:18,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:04:19,132 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-25 20:04:19,132 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:04:19,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586579244] [2021-11-25 20:04:19,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586579244] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:04:19,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360323980] [2021-11-25 20:04:19,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:04:19,133 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:04:19,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:04:19,134 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:04:19,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 20:04:19,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:04:19,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 1965 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 20:04:19,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:04:19,885 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 20:04:19,885 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:04:19,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360323980] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:04:19,886 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:04:19,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2021-11-25 20:04:19,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608326580] [2021-11-25 20:04:19,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:04:19,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 20:04:19,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:04:19,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 20:04:19,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-11-25 20:04:19,888 INFO L87 Difference]: Start difference. First operand 12116 states and 19932 transitions. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 5 states have internal predecessors, (74), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-25 20:04:20,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:04:20,776 INFO L93 Difference]: Finished difference Result 23527 states and 40077 transitions. [2021-11-25 20:04:20,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:04:20,776 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 5 states have internal predecessors, (74), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) Word has length 127 [2021-11-25 20:04:20,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:04:20,858 INFO L225 Difference]: With dead ends: 23527 [2021-11-25 20:04:20,858 INFO L226 Difference]: Without dead ends: 12680 [2021-11-25 20:04:20,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-11-25 20:04:20,921 INFO L933 BasicCegarLoop]: 603 mSDtfsCounter, 2 mSDsluCounter, 3173 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 3588 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:04:20,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 3588 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:04:20,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12680 states. [2021-11-25 20:04:21,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12680 to 12554. [2021-11-25 20:04:21,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12554 states, 9159 states have (on average 1.492193470902937) internal successors, (13667), 9630 states have internal predecessors, (13667), 2342 states have call successors, (2342), 684 states have call predecessors, (2342), 1052 states have return successors, (5135), 2399 states have call predecessors, (5135), 2325 states have call successors, (5135) [2021-11-25 20:04:21,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12554 states to 12554 states and 21144 transitions. [2021-11-25 20:04:21,763 INFO L78 Accepts]: Start accepts. Automaton has 12554 states and 21144 transitions. Word has length 127 [2021-11-25 20:04:21,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:04:21,764 INFO L470 AbstractCegarLoop]: Abstraction has 12554 states and 21144 transitions. [2021-11-25 20:04:21,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 5 states have internal predecessors, (74), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-25 20:04:21,764 INFO L276 IsEmpty]: Start isEmpty. Operand 12554 states and 21144 transitions. [2021-11-25 20:04:21,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-25 20:04:21,773 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:04:21,773 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:04:21,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-25 20:04:21,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:04:21,996 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:04:21,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:04:21,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1515366247, now seen corresponding path program 1 times [2021-11-25 20:04:21,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:04:21,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32747400] [2021-11-25 20:04:21,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:04:21,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:04:22,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:04:22,277 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-25 20:04:22,277 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:04:22,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32747400] [2021-11-25 20:04:22,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32747400] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:04:22,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46436825] [2021-11-25 20:04:22,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:04:22,278 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:04:22,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:04:22,279 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:04:22,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-25 20:04:22,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:04:22,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 1965 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 20:04:22,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:04:22,913 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 20:04:22,914 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:04:22,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46436825] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:04:22,914 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:04:22,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2021-11-25 20:04:22,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782971660] [2021-11-25 20:04:22,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:04:22,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 20:04:22,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:04:22,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 20:04:22,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-11-25 20:04:22,917 INFO L87 Difference]: Start difference. First operand 12554 states and 21144 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-25 20:04:23,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:04:23,614 INFO L93 Difference]: Finished difference Result 24175 states and 41743 transitions. [2021-11-25 20:04:23,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:04:23,614 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) Word has length 131 [2021-11-25 20:04:23,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:04:23,700 INFO L225 Difference]: With dead ends: 24175 [2021-11-25 20:04:23,701 INFO L226 Difference]: Without dead ends: 12902 [2021-11-25 20:04:23,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-11-25 20:04:23,772 INFO L933 BasicCegarLoop]: 609 mSDtfsCounter, 2 mSDsluCounter, 3198 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 3619 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:04:23,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 3619 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:04:23,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12902 states. [2021-11-25 20:04:24,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12902 to 12608. [2021-11-25 20:04:24,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12608 states, 9213 states have (on average 1.489308585694128) internal successors, (13721), 9630 states have internal predecessors, (13721), 2342 states have call successors, (2342), 684 states have call predecessors, (2342), 1052 states have return successors, (5135), 2453 states have call predecessors, (5135), 2325 states have call successors, (5135) [2021-11-25 20:04:24,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12608 states to 12608 states and 21198 transitions. [2021-11-25 20:04:24,844 INFO L78 Accepts]: Start accepts. Automaton has 12608 states and 21198 transitions. Word has length 131 [2021-11-25 20:04:24,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:04:24,845 INFO L470 AbstractCegarLoop]: Abstraction has 12608 states and 21198 transitions. [2021-11-25 20:04:24,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-25 20:04:24,845 INFO L276 IsEmpty]: Start isEmpty. Operand 12608 states and 21198 transitions. [2021-11-25 20:04:24,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-25 20:04:24,856 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:04:24,856 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:04:24,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-25 20:04:25,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-25 20:04:25,083 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:04:25,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:04:25,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1376197283, now seen corresponding path program 1 times [2021-11-25 20:04:25,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:04:25,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894297103] [2021-11-25 20:04:25,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:04:25,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:04:25,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:04:25,258 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-25 20:04:25,258 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:04:25,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894297103] [2021-11-25 20:04:25,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894297103] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:04:25,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002210241] [2021-11-25 20:04:25,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:04:25,259 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:04:25,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:04:25,261 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:04:25,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-25 20:04:25,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:04:25,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 1966 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:04:25,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:04:25,867 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-25 20:04:25,867 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:04:25,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002210241] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:04:25,868 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:04:25,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2021-11-25 20:04:25,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592220116] [2021-11-25 20:04:25,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:04:25,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:04:25,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:04:25,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:04:25,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-11-25 20:04:25,869 INFO L87 Difference]: Start difference. First operand 12608 states and 21198 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-25 20:04:26,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:04:26,641 INFO L93 Difference]: Finished difference Result 26245 states and 47262 transitions. [2021-11-25 20:04:26,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:04:26,641 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 144 [2021-11-25 20:04:26,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:04:26,730 INFO L225 Difference]: With dead ends: 26245 [2021-11-25 20:04:26,730 INFO L226 Difference]: Without dead ends: 14888 [2021-11-25 20:04:26,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-11-25 20:04:26,814 INFO L933 BasicCegarLoop]: 657 mSDtfsCounter, 71 mSDsluCounter, 624 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 1245 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:04:26,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 1245 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:04:26,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14888 states. [2021-11-25 20:04:27,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14888 to 14131. [2021-11-25 20:04:27,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14131 states, 10592 states have (on average 1.4937688821752266) internal successors, (15822), 11013 states have internal predecessors, (15822), 2482 states have call successors, (2482), 684 states have call predecessors, (2482), 1056 states have return successors, (5295), 2593 states have call predecessors, (5295), 2465 states have call successors, (5295) [2021-11-25 20:04:27,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14131 states to 14131 states and 23599 transitions. [2021-11-25 20:04:27,991 INFO L78 Accepts]: Start accepts. Automaton has 14131 states and 23599 transitions. Word has length 144 [2021-11-25 20:04:27,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:04:27,992 INFO L470 AbstractCegarLoop]: Abstraction has 14131 states and 23599 transitions. [2021-11-25 20:04:27,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-25 20:04:27,992 INFO L276 IsEmpty]: Start isEmpty. Operand 14131 states and 23599 transitions. [2021-11-25 20:04:28,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-25 20:04:28,003 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:04:28,003 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:04:28,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-25 20:04:28,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-25 20:04:28,447 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:04:28,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:04:28,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1880094378, now seen corresponding path program 1 times [2021-11-25 20:04:28,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:04:28,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675680926] [2021-11-25 20:04:28,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:04:28,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:04:28,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:04:28,639 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-25 20:04:28,640 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:04:28,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675680926] [2021-11-25 20:04:28,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675680926] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:04:28,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998293604] [2021-11-25 20:04:28,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:04:28,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:04:28,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:04:28,642 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:04:28,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-25 20:04:28,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:04:28,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 1962 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 20:04:28,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:04:29,232 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 20:04:29,232 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:04:29,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998293604] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:04:29,232 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:04:29,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2021-11-25 20:04:29,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978907773] [2021-11-25 20:04:29,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:04:29,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 20:04:29,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:04:29,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 20:04:29,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-11-25 20:04:29,235 INFO L87 Difference]: Start difference. First operand 14131 states and 23599 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-25 20:04:29,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:04:29,988 INFO L93 Difference]: Finished difference Result 27329 states and 46653 transitions. [2021-11-25 20:04:29,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:04:29,988 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) Word has length 131 [2021-11-25 20:04:29,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:04:30,070 INFO L225 Difference]: With dead ends: 27329 [2021-11-25 20:04:30,070 INFO L226 Difference]: Without dead ends: 14479 [2021-11-25 20:04:30,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-11-25 20:04:30,143 INFO L933 BasicCegarLoop]: 609 mSDtfsCounter, 2 mSDsluCounter, 3198 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 3619 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:04:30,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 3619 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:04:30,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14479 states. [2021-11-25 20:04:31,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14479 to 14185. [2021-11-25 20:04:31,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14185 states, 10646 states have (on average 1.4912643246289685) internal successors, (15876), 11013 states have internal predecessors, (15876), 2482 states have call successors, (2482), 684 states have call predecessors, (2482), 1056 states have return successors, (5295), 2647 states have call predecessors, (5295), 2465 states have call successors, (5295) [2021-11-25 20:04:31,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14185 states to 14185 states and 23653 transitions. [2021-11-25 20:04:31,537 INFO L78 Accepts]: Start accepts. Automaton has 14185 states and 23653 transitions. Word has length 131 [2021-11-25 20:04:31,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:04:31,538 INFO L470 AbstractCegarLoop]: Abstraction has 14185 states and 23653 transitions. [2021-11-25 20:04:31,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-25 20:04:31,538 INFO L276 IsEmpty]: Start isEmpty. Operand 14185 states and 23653 transitions. [2021-11-25 20:04:31,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-25 20:04:31,550 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:04:31,550 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:04:31,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-25 20:04:31,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:04:31,766 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:04:31,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:04:31,766 INFO L85 PathProgramCache]: Analyzing trace with hash 493118779, now seen corresponding path program 1 times [2021-11-25 20:04:31,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:04:31,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823037443] [2021-11-25 20:04:31,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:04:31,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:04:31,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:04:31,962 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-25 20:04:31,962 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:04:31,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823037443] [2021-11-25 20:04:31,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823037443] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:04:31,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740740209] [2021-11-25 20:04:31,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:04:31,963 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:04:31,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:04:31,964 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:04:31,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-25 20:04:32,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:04:32,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 1971 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 20:04:32,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:04:32,502 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 20:04:32,502 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:04:32,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740740209] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:04:32,502 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:04:32,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2021-11-25 20:04:32,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313163979] [2021-11-25 20:04:32,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:04:32,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:04:32,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:04:32,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:04:32,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-11-25 20:04:32,504 INFO L87 Difference]: Start difference. First operand 14185 states and 23653 transitions. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 3 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2021-11-25 20:04:33,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:04:33,510 INFO L93 Difference]: Finished difference Result 28292 states and 48404 transitions. [2021-11-25 20:04:33,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:04:33,511 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 3 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) Word has length 138 [2021-11-25 20:04:33,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:04:33,609 INFO L225 Difference]: With dead ends: 28292 [2021-11-25 20:04:33,610 INFO L226 Difference]: Without dead ends: 12287 [2021-11-25 20:04:33,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-11-25 20:04:33,720 INFO L933 BasicCegarLoop]: 637 mSDtfsCounter, 220 mSDsluCounter, 2426 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 2921 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:04:33,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 2921 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:04:33,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12287 states. [2021-11-25 20:04:34,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12287 to 12267. [2021-11-25 20:04:34,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12267 states, 8942 states have (on average 1.443748602102438) internal successors, (12910), 9303 states have internal predecessors, (12910), 2298 states have call successors, (2298), 678 states have call predecessors, (2298), 1026 states have return successors, (4970), 2445 states have call predecessors, (4970), 2281 states have call successors, (4970) [2021-11-25 20:04:34,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12267 states to 12267 states and 20178 transitions. [2021-11-25 20:04:34,785 INFO L78 Accepts]: Start accepts. Automaton has 12267 states and 20178 transitions. Word has length 138 [2021-11-25 20:04:34,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:04:34,785 INFO L470 AbstractCegarLoop]: Abstraction has 12267 states and 20178 transitions. [2021-11-25 20:04:34,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 3 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2021-11-25 20:04:34,786 INFO L276 IsEmpty]: Start isEmpty. Operand 12267 states and 20178 transitions. [2021-11-25 20:04:34,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-25 20:04:34,799 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:04:34,800 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:04:34,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-25 20:04:35,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-25 20:04:35,015 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:04:35,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:04:35,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1472538997, now seen corresponding path program 1 times [2021-11-25 20:04:35,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:04:35,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163796421] [2021-11-25 20:04:35,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:04:35,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:04:35,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:04:35,221 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-25 20:04:35,221 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:04:35,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163796421] [2021-11-25 20:04:35,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163796421] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:04:35,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915763114] [2021-11-25 20:04:35,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:04:35,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:04:35,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:04:35,224 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:04:35,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-25 20:04:35,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:04:35,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 1975 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 20:04:35,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:04:36,014 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 20:04:36,014 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:04:36,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915763114] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:04:36,015 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:04:36,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2021-11-25 20:04:36,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027185444] [2021-11-25 20:04:36,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:04:36,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:04:36,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:04:36,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:04:36,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-11-25 20:04:36,017 INFO L87 Difference]: Start difference. First operand 12267 states and 20178 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2021-11-25 20:04:37,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:04:37,407 INFO L93 Difference]: Finished difference Result 26876 states and 45258 transitions. [2021-11-25 20:04:37,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:04:37,408 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) Word has length 142 [2021-11-25 20:04:37,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:04:37,506 INFO L225 Difference]: With dead ends: 26876 [2021-11-25 20:04:37,506 INFO L226 Difference]: Without dead ends: 13571 [2021-11-25 20:04:37,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-11-25 20:04:37,607 INFO L933 BasicCegarLoop]: 610 mSDtfsCounter, 310 mSDsluCounter, 2362 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 2824 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:04:37,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 2824 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 20:04:37,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13571 states. [2021-11-25 20:04:38,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13571 to 13457. [2021-11-25 20:04:38,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13457 states, 10051 states have (on average 1.439458760322356) internal successors, (14468), 10411 states have internal predecessors, (14468), 2338 states have call successors, (2338), 720 states have call predecessors, (2338), 1067 states have return successors, (4630), 2485 states have call predecessors, (4630), 2321 states have call successors, (4630) [2021-11-25 20:04:38,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13457 states to 13457 states and 21436 transitions. [2021-11-25 20:04:38,602 INFO L78 Accepts]: Start accepts. Automaton has 13457 states and 21436 transitions. Word has length 142 [2021-11-25 20:04:38,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:04:38,603 INFO L470 AbstractCegarLoop]: Abstraction has 13457 states and 21436 transitions. [2021-11-25 20:04:38,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2021-11-25 20:04:38,603 INFO L276 IsEmpty]: Start isEmpty. Operand 13457 states and 21436 transitions. [2021-11-25 20:04:38,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-25 20:04:38,615 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:04:38,615 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:04:38,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-25 20:04:38,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-25 20:04:38,843 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:04:38,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:04:38,843 INFO L85 PathProgramCache]: Analyzing trace with hash -293368477, now seen corresponding path program 1 times [2021-11-25 20:04:38,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:04:38,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28389384] [2021-11-25 20:04:38,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:04:38,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:04:38,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:04:39,021 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-25 20:04:39,022 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:04:39,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28389384] [2021-11-25 20:04:39,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28389384] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:04:39,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776384234] [2021-11-25 20:04:39,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:04:39,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:04:39,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:04:39,027 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:04:39,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-25 20:04:39,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:04:39,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 1975 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-25 20:04:39,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:04:39,813 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-25 20:04:39,813 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:04:39,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776384234] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:04:39,813 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:04:39,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 11 [2021-11-25 20:04:39,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586734017] [2021-11-25 20:04:39,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:04:39,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:04:39,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:04:39,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:04:39,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-25 20:04:39,815 INFO L87 Difference]: Start difference. First operand 13457 states and 21436 transitions. Second operand has 6 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2021-11-25 20:04:41,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:04:41,983 INFO L93 Difference]: Finished difference Result 35635 states and 60590 transitions. [2021-11-25 20:04:41,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:04:41,984 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) Word has length 143 [2021-11-25 20:04:41,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:04:42,126 INFO L225 Difference]: With dead ends: 35635 [2021-11-25 20:04:42,127 INFO L226 Difference]: Without dead ends: 22110 [2021-11-25 20:04:42,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 144 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 20:04:42,201 INFO L933 BasicCegarLoop]: 776 mSDtfsCounter, 626 mSDsluCounter, 2820 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 645 SdHoareTripleChecker+Valid, 3452 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-25 20:04:42,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [645 Valid, 3452 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-25 20:04:42,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22110 states. [2021-11-25 20:04:43,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22110 to 20793. [2021-11-25 20:04:43,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20793 states, 15533 states have (on average 1.4355887465396253) internal successors, (22299), 16134 states have internal predecessors, (22299), 3580 states have call successors, (3580), 1133 states have call predecessors, (3580), 1679 states have return successors, (8294), 3784 states have call predecessors, (8294), 3558 states have call successors, (8294) [2021-11-25 20:04:43,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20793 states to 20793 states and 34173 transitions. [2021-11-25 20:04:43,678 INFO L78 Accepts]: Start accepts. Automaton has 20793 states and 34173 transitions. Word has length 143 [2021-11-25 20:04:43,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:04:43,678 INFO L470 AbstractCegarLoop]: Abstraction has 20793 states and 34173 transitions. [2021-11-25 20:04:43,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2021-11-25 20:04:43,679 INFO L276 IsEmpty]: Start isEmpty. Operand 20793 states and 34173 transitions. [2021-11-25 20:04:43,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-25 20:04:43,691 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:04:43,692 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:04:43,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-25 20:04:43,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-25 20:04:43,919 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:04:43,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:04:43,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1821893157, now seen corresponding path program 1 times [2021-11-25 20:04:43,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:04:43,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229888794] [2021-11-25 20:04:43,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:04:43,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:04:43,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:04:44,282 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-25 20:04:44,283 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:04:44,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229888794] [2021-11-25 20:04:44,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229888794] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:04:44,283 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:04:44,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 20:04:44,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765054897] [2021-11-25 20:04:44,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:04:44,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 20:04:44,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:04:44,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 20:04:44,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:04:44,286 INFO L87 Difference]: Start difference. First operand 20793 states and 34173 transitions. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 5 states have internal predecessors, (92), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-25 20:04:45,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:04:45,639 INFO L93 Difference]: Finished difference Result 39954 states and 67364 transitions. [2021-11-25 20:04:45,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:04:45,639 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 5 states have internal predecessors, (92), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) Word has length 149 [2021-11-25 20:04:45,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:04:45,799 INFO L225 Difference]: With dead ends: 39954 [2021-11-25 20:04:45,799 INFO L226 Difference]: Without dead ends: 21577 [2021-11-25 20:04:46,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 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 20:04:46,044 INFO L933 BasicCegarLoop]: 590 mSDtfsCounter, 2 mSDsluCounter, 3112 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 3514 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:04:46,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 3514 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:04:46,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21577 states. [2021-11-25 20:04:47,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21577 to 21330. [2021-11-25 20:04:47,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21330 states, 15878 states have (on average 1.4261241970021414) internal successors, (22644), 16560 states have internal predecessors, (22644), 3576 states have call successors, (3576), 1133 states have call predecessors, (3576), 1875 states have return successors, (8660), 3895 states have call predecessors, (8660), 3554 states have call successors, (8660) [2021-11-25 20:04:47,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21330 states to 21330 states and 34880 transitions. [2021-11-25 20:04:47,423 INFO L78 Accepts]: Start accepts. Automaton has 21330 states and 34880 transitions. Word has length 149 [2021-11-25 20:04:47,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:04:47,424 INFO L470 AbstractCegarLoop]: Abstraction has 21330 states and 34880 transitions. [2021-11-25 20:04:47,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 5 states have internal predecessors, (92), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-25 20:04:47,424 INFO L276 IsEmpty]: Start isEmpty. Operand 21330 states and 34880 transitions. [2021-11-25 20:04:47,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-11-25 20:04:47,438 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:04:47,438 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:04:47,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-25 20:04:47,439 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:04:47,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:04:47,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1715976731, now seen corresponding path program 1 times [2021-11-25 20:04:47,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:04:47,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264489267] [2021-11-25 20:04:47,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:04:47,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:04:47,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:04:47,832 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-25 20:04:47,833 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:04:47,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264489267] [2021-11-25 20:04:47,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264489267] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:04:47,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104933080] [2021-11-25 20:04:47,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:04:47,834 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:04:47,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:04:47,835 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:04:47,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-25 20:04:48,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:04:48,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 1998 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-25 20:04:48,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:04:48,434 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-25 20:04:48,434 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:04:48,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104933080] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:04:48,434 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:04:48,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 15 [2021-11-25 20:04:48,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176067250] [2021-11-25 20:04:48,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:04:48,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 20:04:48,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:04:48,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 20:04:48,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-11-25 20:04:48,436 INFO L87 Difference]: Start difference. First operand 21330 states and 34880 transitions. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 6 states have internal predecessors, (105), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-25 20:04:50,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:04:50,598 INFO L93 Difference]: Finished difference Result 44335 states and 77463 transitions. [2021-11-25 20:04:50,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 20:04:50,599 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 6 states have internal predecessors, (105), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) Word has length 159 [2021-11-25 20:04:50,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:04:50,776 INFO L225 Difference]: With dead ends: 44335 [2021-11-25 20:04:50,776 INFO L226 Difference]: Without dead ends: 25449 [2021-11-25 20:04:50,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-11-25 20:04:50,915 INFO L933 BasicCegarLoop]: 723 mSDtfsCounter, 511 mSDsluCounter, 3435 mSDsCounter, 0 mSdLazyCounter, 1183 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 3950 SdHoareTripleChecker+Invalid, 1204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 20:04:50,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [516 Valid, 3950 Invalid, 1204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1183 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-25 20:04:50,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25449 states. [2021-11-25 20:04:52,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25449 to 25212. [2021-11-25 20:04:52,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25212 states, 18862 states have (on average 1.3852189587530486) internal successors, (26128), 19670 states have internal predecessors, (26128), 4004 states have call successors, (4004), 1328 states have call predecessors, (4004), 2345 states have return successors, (11947), 4472 states have call predecessors, (11947), 3982 states have call successors, (11947) [2021-11-25 20:04:52,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25212 states to 25212 states and 42079 transitions. [2021-11-25 20:04:52,671 INFO L78 Accepts]: Start accepts. Automaton has 25212 states and 42079 transitions. Word has length 159 [2021-11-25 20:04:52,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:04:52,672 INFO L470 AbstractCegarLoop]: Abstraction has 25212 states and 42079 transitions. [2021-11-25 20:04:52,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 6 states have internal predecessors, (105), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-25 20:04:52,672 INFO L276 IsEmpty]: Start isEmpty. Operand 25212 states and 42079 transitions. [2021-11-25 20:04:52,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-25 20:04:52,682 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:04:52,682 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:04:52,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-25 20:04:52,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-11-25 20:04:52,883 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:04:52,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:04:52,884 INFO L85 PathProgramCache]: Analyzing trace with hash -415345974, now seen corresponding path program 1 times [2021-11-25 20:04:52,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:04:52,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196451811] [2021-11-25 20:04:52,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:04:52,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:04:52,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:04:53,080 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-25 20:04:53,080 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:04:53,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196451811] [2021-11-25 20:04:53,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196451811] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:04:53,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906618522] [2021-11-25 20:04:53,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:04:53,081 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:04:53,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:04:53,083 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:04:53,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-25 20:04:53,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:04:53,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 1990 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 20:04:53,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:04:54,422 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-25 20:04:54,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:04:55,671 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-25 20:04:55,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906618522] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-25 20:04:55,671 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-25 20:04:55,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12, 6] total 21 [2021-11-25 20:04:55,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544872725] [2021-11-25 20:04:55,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:04:55,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:04:55,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:04:55,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:04:55,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-11-25 20:04:55,674 INFO L87 Difference]: Start difference. First operand 25212 states and 42079 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 5 states have internal predecessors, (91), 4 states have call successors, (25), 4 states have call predecessors, (25), 2 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-25 20:05:01,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:05:01,934 INFO L93 Difference]: Finished difference Result 60170 states and 105525 transitions. [2021-11-25 20:05:01,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 20:05:01,935 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 5 states have internal predecessors, (91), 4 states have call successors, (25), 4 states have call predecessors, (25), 2 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) Word has length 152 [2021-11-25 20:05:01,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:05:02,137 INFO L225 Difference]: With dead ends: 60170 [2021-11-25 20:05:02,137 INFO L226 Difference]: Without dead ends: 33838 [2021-11-25 20:05:02,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-11-25 20:05:02,258 INFO L933 BasicCegarLoop]: 900 mSDtfsCounter, 1413 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 1676 mSolverCounterSat, 486 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1508 SdHoareTripleChecker+Valid, 1606 SdHoareTripleChecker+Invalid, 2162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 486 IncrementalHoareTripleChecker+Valid, 1676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:05:02,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1508 Valid, 1606 Invalid, 2162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [486 Valid, 1676 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-11-25 20:05:02,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33838 states. [2021-11-25 20:05:04,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33838 to 28401. [2021-11-25 20:05:04,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28401 states, 20667 states have (on average 1.3930420477089078) internal successors, (28790), 21840 states have internal predecessors, (28790), 5311 states have call successors, (5311), 1347 states have call predecessors, (5311), 2422 states have return successors, (13589), 5683 states have call predecessors, (13589), 5289 states have call successors, (13589) [2021-11-25 20:05:04,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28401 states to 28401 states and 47690 transitions. [2021-11-25 20:05:04,898 INFO L78 Accepts]: Start accepts. Automaton has 28401 states and 47690 transitions. Word has length 152 [2021-11-25 20:05:04,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:05:04,898 INFO L470 AbstractCegarLoop]: Abstraction has 28401 states and 47690 transitions. [2021-11-25 20:05:04,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 5 states have internal predecessors, (91), 4 states have call successors, (25), 4 states have call predecessors, (25), 2 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-25 20:05:04,899 INFO L276 IsEmpty]: Start isEmpty. Operand 28401 states and 47690 transitions. [2021-11-25 20:05:04,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-25 20:05:04,908 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:05:04,908 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:05:04,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-25 20:05:05,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-25 20:05:05,109 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:05:05,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:05:05,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1698875997, now seen corresponding path program 1 times [2021-11-25 20:05:05,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:05:05,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316592394] [2021-11-25 20:05:05,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:05:05,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:05:05,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:05:05,314 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-25 20:05:05,314 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:05:05,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316592394] [2021-11-25 20:05:05,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316592394] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:05:05,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146215497] [2021-11-25 20:05:05,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:05:05,315 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:05:05,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:05:05,316 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:05:05,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a69ab2c8-5f67-4786-9605-6f629af40d3c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-25 20:05:05,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:05:05,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 1995 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-25 20:05:05,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:05:07,053 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 20:05:07,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:05:52,615 WARN L227 SmtUtils]: Spent 43.10s on a formula simplification. DAG size of input: 1445 DAG size of output: 55 (called from [L 234] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2021-11-25 20:06:39,576 WARN L227 SmtUtils]: Spent 46.26s on a formula simplification. DAG size of input: 1445 DAG size of output: 55 (called from [L 234] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2021-11-25 20:06:40,241 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-25 20:06:40,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146215497] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:06:40,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1225293642] [2021-11-25 20:06:40,277 INFO L159 IcfgInterpreter]: Started Sifa with 132 locations of interest [2021-11-25 20:06:40,277 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:06:40,284 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:06:40,291 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:06:40,291 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:06:46,050 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 580 for LOIs [2021-11-25 20:06:57,240 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 62 for LOIs [2021-11-25 20:06:57,258 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 605 for LOIs