./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product22.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product22.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 10f09c8c5639b403d441157c6cb90f176690981c36f4af5417d0103735cbe364 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:36:33,108 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:36:33,111 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:36:33,152 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:36:33,153 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:36:33,155 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:36:33,157 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:36:33,160 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:36:33,163 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:36:33,165 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:36:33,166 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:36:33,168 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:36:33,169 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:36:33,171 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:36:33,173 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:36:33,175 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:36:33,177 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:36:33,179 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:36:33,182 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:36:33,185 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:36:33,188 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:36:33,190 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:36:33,192 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:36:33,194 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:36:33,199 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:36:33,200 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:36:33,200 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:36:33,202 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:36:33,203 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:36:33,204 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:36:33,205 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:36:33,207 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:36:33,208 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:36:33,209 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:36:33,211 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:36:33,212 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:36:33,213 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:36:33,214 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:36:33,214 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:36:33,216 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:36:33,217 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:36:33,218 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 00:36:33,268 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:36:33,268 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:36:33,269 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:36:33,269 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:36:33,270 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:36:33,278 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:36:33,279 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:36:33,279 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:36:33,279 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:36:33,279 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:36:33,280 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:36:33,280 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:36:33,280 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:36:33,280 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:36:33,281 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:36:33,281 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:36:33,281 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:36:33,281 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:36:33,282 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:36:33,283 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 00:36:33,283 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:36:33,283 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 00:36:33,283 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:36:33,284 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:36:33,284 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:36:33,284 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:36:33,284 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 00:36:33,285 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:36:33,285 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:36:33,285 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:36:33,286 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:36:33,286 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:36:33,286 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:36:33,286 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:36:33,287 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:36:33,287 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:36:33,287 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:36:33,287 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:36:33,288 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:36:33,288 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:36:33,288 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:36:33,288 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_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 10f09c8c5639b403d441157c6cb90f176690981c36f4af5417d0103735cbe364 [2021-11-21 00:36:33,612 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:36:33,635 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:36:33,639 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:36:33,640 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:36:33,641 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:36:33,643 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/product-lines/elevator_spec3_product22.cil.c [2021-11-21 00:36:33,735 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/data/c16a777f5/4d0a616bed9e4cbfa55510ac16e03d6f/FLAG0cd8aa585 [2021-11-21 00:36:34,459 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:36:34,460 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/sv-benchmarks/c/product-lines/elevator_spec3_product22.cil.c [2021-11-21 00:36:34,493 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/data/c16a777f5/4d0a616bed9e4cbfa55510ac16e03d6f/FLAG0cd8aa585 [2021-11-21 00:36:34,639 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/data/c16a777f5/4d0a616bed9e4cbfa55510ac16e03d6f [2021-11-21 00:36:34,642 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:36:34,644 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:36:34,646 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:36:34,646 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:36:34,650 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:36:34,652 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:36:34" (1/1) ... [2021-11-21 00:36:34,653 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65cf95c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:36:34, skipping insertion in model container [2021-11-21 00:36:34,653 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:36:34" (1/1) ... [2021-11-21 00:36:34,662 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:36:34,743 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:36:35,008 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_2d389856-1f1b-4f8a-bc06-9e751cd29a15/sv-benchmarks/c/product-lines/elevator_spec3_product22.cil.c[3205,3218] [2021-11-21 00:36:35,380 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:36:35,393 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:36:35,431 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_2d389856-1f1b-4f8a-bc06-9e751cd29a15/sv-benchmarks/c/product-lines/elevator_spec3_product22.cil.c[3205,3218] [2021-11-21 00:36:35,510 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:36:35,539 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:36:35,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:36:35 WrapperNode [2021-11-21 00:36:35,540 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:36:35,541 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:36:35,541 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:36:35,541 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:36:35,549 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:36:35" (1/1) ... [2021-11-21 00:36:35,582 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:36:35" (1/1) ... [2021-11-21 00:36:35,654 INFO L137 Inliner]: procedures = 92, calls = 351, calls flagged for inlining = 26, calls inlined = 22, statements flattened = 905 [2021-11-21 00:36:35,655 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:36:35,655 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:36:35,656 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:36:35,656 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:36:35,667 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:36:35" (1/1) ... [2021-11-21 00:36:35,671 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:36:35" (1/1) ... [2021-11-21 00:36:35,680 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:36:35" (1/1) ... [2021-11-21 00:36:35,687 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:36:35" (1/1) ... [2021-11-21 00:36:35,742 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:36:35" (1/1) ... [2021-11-21 00:36:35,794 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:36:35" (1/1) ... [2021-11-21 00:36:35,802 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:36:35" (1/1) ... [2021-11-21 00:36:35,832 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:36:35,833 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:36:35,833 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:36:35,834 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:36:35,848 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:36:35" (1/1) ... [2021-11-21 00:36:35,859 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:36:35,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:36:35,899 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:36:35,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:36:35,965 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:36:35,966 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2021-11-21 00:36:35,966 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2021-11-21 00:36:35,967 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-21 00:36:35,967 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-21 00:36:35,967 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-21 00:36:35,967 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-21 00:36:35,968 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-21 00:36:35,968 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-21 00:36:35,968 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-21 00:36:35,968 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-21 00:36:35,969 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-21 00:36:35,969 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-21 00:36:35,969 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-21 00:36:35,969 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-21 00:36:35,970 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-21 00:36:35,971 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-21 00:36:35,971 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-21 00:36:35,971 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-21 00:36:35,971 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-21 00:36:35,972 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-21 00:36:35,972 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-21 00:36:35,972 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-21 00:36:35,972 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-21 00:36:35,973 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-21 00:36:35,973 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-21 00:36:35,973 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-21 00:36:35,974 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2021-11-21 00:36:35,974 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2021-11-21 00:36:35,974 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-21 00:36:35,974 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-21 00:36:35,976 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2021-11-21 00:36:35,977 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2021-11-21 00:36:35,977 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-21 00:36:35,977 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-21 00:36:35,977 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-21 00:36:35,978 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-21 00:36:35,978 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-21 00:36:35,978 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-21 00:36:35,978 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-21 00:36:35,978 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-21 00:36:35,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:36:35,979 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-21 00:36:35,980 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-21 00:36:35,980 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-21 00:36:35,981 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-21 00:36:35,981 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-21 00:36:35,982 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-21 00:36:35,983 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-21 00:36:35,983 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-21 00:36:35,985 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__twothirdsfull [2021-11-21 00:36:35,985 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__twothirdsfull [2021-11-21 00:36:35,985 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2021-11-21 00:36:35,986 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2021-11-21 00:36:35,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:36:35,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:36:35,987 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-21 00:36:35,987 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-21 00:36:36,253 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:36:36,272 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:36:37,703 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:36:38,491 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:36:38,492 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-21 00:36:38,498 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:36:38 BoogieIcfgContainer [2021-11-21 00:36:38,498 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:36:38,504 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:36:38,504 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:36:38,508 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:36:38,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:36:34" (1/3) ... [2021-11-21 00:36:38,511 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4137b99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:36:38, skipping insertion in model container [2021-11-21 00:36:38,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:36:35" (2/3) ... [2021-11-21 00:36:38,512 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4137b99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:36:38, skipping insertion in model container [2021-11-21 00:36:38,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:36:38" (3/3) ... [2021-11-21 00:36:38,514 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product22.cil.c [2021-11-21 00:36:38,521 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:36:38,522 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 00:36:38,590 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:36:38,599 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 00:36:38,600 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 00:36:38,638 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) [2021-11-21 00:36:38,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-21 00:36:38,651 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:36:38,652 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] [2021-11-21 00:36:38,653 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:36:38,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:36:38,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1214067236, now seen corresponding path program 1 times [2021-11-21 00:36:38,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:36:38,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640667226] [2021-11-21 00:36:38,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:36:38,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:36:38,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:36:39,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:36:39,309 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:36:39,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640667226] [2021-11-21 00:36:39,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640667226] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:36:39,310 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:36:39,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 00:36:39,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021704590] [2021-11-21 00:36:39,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:36:39,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:36:39,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:36:39,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:36:39,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:36:39,368 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) [2021-11-21 00:36:40,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:36:40,734 INFO L93 Difference]: Finished difference Result 1171 states and 1873 transitions. [2021-11-21 00:36:40,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 00:36:40,742 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 [2021-11-21 00:36:40,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:36:40,772 INFO L225 Difference]: With dead ends: 1171 [2021-11-21 00:36:40,772 INFO L226 Difference]: Without dead ends: 762 [2021-11-21 00:36:40,785 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 [2021-11-21 00:36:40,790 INFO L933 BasicCegarLoop]: 701 mSDtfsCounter, 544 mSDsluCounter, 2581 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 1.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:36:40,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [548 Valid, 3128 Invalid, 740 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [54 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-21 00:36:40,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-11-21 00:36:40,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 754. [2021-11-21 00:36:41,003 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) [2021-11-21 00:36:41,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1161 transitions. [2021-11-21 00:36:41,028 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1161 transitions. Word has length 49 [2021-11-21 00:36:41,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:36:41,029 INFO L470 AbstractCegarLoop]: Abstraction has 754 states and 1161 transitions. [2021-11-21 00:36:41,030 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) [2021-11-21 00:36:41,032 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1161 transitions. [2021-11-21 00:36:41,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-21 00:36:41,043 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:36:41,044 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] [2021-11-21 00:36:41,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 00:36:41,046 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:36:41,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:36:41,051 INFO L85 PathProgramCache]: Analyzing trace with hash 76487303, now seen corresponding path program 1 times [2021-11-21 00:36:41,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:36:41,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952584893] [2021-11-21 00:36:41,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:36:41,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:36:41,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:36:41,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:36:41,306 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:36:41,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952584893] [2021-11-21 00:36:41,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952584893] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:36:41,307 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:36:41,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:36:41,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659609310] [2021-11-21 00:36:41,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:36:41,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:36:41,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:36:41,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:36:41,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:36:41,313 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) [2021-11-21 00:36:41,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:36:41,643 INFO L93 Difference]: Finished difference Result 2232 states and 3471 transitions. [2021-11-21 00:36:41,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:36:41,645 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 [2021-11-21 00:36:41,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:36:41,665 INFO L225 Difference]: With dead ends: 2232 [2021-11-21 00:36:41,665 INFO L226 Difference]: Without dead ends: 1491 [2021-11-21 00:36:41,675 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 [2021-11-21 00:36:41,677 INFO L933 BasicCegarLoop]: 732 mSDtfsCounter, 602 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 1313 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:36:41,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [602 Valid, 1313 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:36:41,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1491 states. [2021-11-21 00:36:41,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1491 to 1419. [2021-11-21 00:36:41,807 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) [2021-11-21 00:36:41,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1419 states to 1419 states and 2209 transitions. [2021-11-21 00:36:41,839 INFO L78 Accepts]: Start accepts. Automaton has 1419 states and 2209 transitions. Word has length 50 [2021-11-21 00:36:41,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:36:41,841 INFO L470 AbstractCegarLoop]: Abstraction has 1419 states and 2209 transitions. [2021-11-21 00:36:41,841 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) [2021-11-21 00:36:41,842 INFO L276 IsEmpty]: Start isEmpty. Operand 1419 states and 2209 transitions. [2021-11-21 00:36:41,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-21 00:36:41,854 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:36:41,855 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, 1] [2021-11-21 00:36:41,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 00:36:41,856 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:36:41,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:36:41,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1414746024, now seen corresponding path program 1 times [2021-11-21 00:36:41,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:36:41,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397401848] [2021-11-21 00:36:41,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:36:41,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:36:41,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:36:42,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:36:42,139 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:36:42,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397401848] [2021-11-21 00:36:42,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397401848] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:36:42,142 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:36:42,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 00:36:42,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528388551] [2021-11-21 00:36:42,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:36:42,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:36:42,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:36:42,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:36:42,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:36:42,145 INFO L87 Difference]: Start difference. First operand 1419 states and 2209 transitions. Second operand has 6 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 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) [2021-11-21 00:36:43,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:36:43,182 INFO L93 Difference]: Finished difference Result 3701 states and 5970 transitions. [2021-11-21 00:36:43,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 00:36:43,183 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 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 87 [2021-11-21 00:36:43,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:36:43,206 INFO L225 Difference]: With dead ends: 3701 [2021-11-21 00:36:43,207 INFO L226 Difference]: Without dead ends: 2294 [2021-11-21 00:36:43,219 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 [2021-11-21 00:36:43,220 INFO L933 BasicCegarLoop]: 760 mSDtfsCounter, 675 mSDsluCounter, 2776 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 697 SdHoareTripleChecker+Valid, 3394 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-21 00:36:43,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [697 Valid, 3394 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-21 00:36:43,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2294 states. [2021-11-21 00:36:43,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2294 to 2080. [2021-11-21 00:36:43,368 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) [2021-11-21 00:36:43,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2080 states to 2080 states and 3263 transitions. [2021-11-21 00:36:43,395 INFO L78 Accepts]: Start accepts. Automaton has 2080 states and 3263 transitions. Word has length 87 [2021-11-21 00:36:43,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:36:43,396 INFO L470 AbstractCegarLoop]: Abstraction has 2080 states and 3263 transitions. [2021-11-21 00:36:43,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 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) [2021-11-21 00:36:43,396 INFO L276 IsEmpty]: Start isEmpty. Operand 2080 states and 3263 transitions. [2021-11-21 00:36:43,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-21 00:36:43,399 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:36:43,400 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] [2021-11-21 00:36:43,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 00:36:43,400 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:36:43,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:36:43,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1595566620, now seen corresponding path program 1 times [2021-11-21 00:36:43,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:36:43,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325569029] [2021-11-21 00:36:43,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:36:43,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:36:43,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:36:43,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:36:43,511 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:36:43,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325569029] [2021-11-21 00:36:43,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325569029] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:36:43,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645091446] [2021-11-21 00:36:43,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:36:43,512 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:36:43,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:36:43,513 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:36:43,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 00:36:43,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:36:43,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 1806 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 00:36:43,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:36:44,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:36:44,232 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:36:44,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645091446] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:36:44,233 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:36:44,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-21 00:36:44,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609258531] [2021-11-21 00:36:44,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:36:44,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:36:44,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:36:44,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:36:44,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:36:44,239 INFO L87 Difference]: Start difference. First operand 2080 states and 3263 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2021-11-21 00:36:44,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:36:44,590 INFO L93 Difference]: Finished difference Result 5950 states and 9595 transitions. [2021-11-21 00:36:44,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:36:44,591 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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 84 [2021-11-21 00:36:44,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:36:44,632 INFO L225 Difference]: With dead ends: 5950 [2021-11-21 00:36:44,633 INFO L226 Difference]: Without dead ends: 3882 [2021-11-21 00:36:44,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:36:44,653 INFO L933 BasicCegarLoop]: 684 mSDtfsCounter, 567 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 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 [2021-11-21 00:36:44,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [567 Valid, 1192 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:36:44,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3882 states. [2021-11-21 00:36:44,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3882 to 3764. [2021-11-21 00:36:44,891 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) [2021-11-21 00:36:44,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3764 states to 3764 states and 5963 transitions. [2021-11-21 00:36:44,922 INFO L78 Accepts]: Start accepts. Automaton has 3764 states and 5963 transitions. Word has length 84 [2021-11-21 00:36:44,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:36:44,923 INFO L470 AbstractCegarLoop]: Abstraction has 3764 states and 5963 transitions. [2021-11-21 00:36:44,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2021-11-21 00:36:44,924 INFO L276 IsEmpty]: Start isEmpty. Operand 3764 states and 5963 transitions. [2021-11-21 00:36:44,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-21 00:36:44,930 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:36:44,930 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] [2021-11-21 00:36:44,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 00:36:45,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:36:45,153 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:36:45,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:36:45,154 INFO L85 PathProgramCache]: Analyzing trace with hash 561269759, now seen corresponding path program 1 times [2021-11-21 00:36:45,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:36:45,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903854779] [2021-11-21 00:36:45,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:36:45,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:36:45,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:36:45,266 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:36:45,266 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:36:45,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903854779] [2021-11-21 00:36:45,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903854779] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:36:45,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515348094] [2021-11-21 00:36:45,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:36:45,267 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:36:45,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:36:45,280 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:36:45,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 00:36:45,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:36:45,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 1807 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 00:36:45,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:36:45,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:36:45,903 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:36:45,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515348094] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:36:45,903 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:36:45,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-21 00:36:45,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878664798] [2021-11-21 00:36:45,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:36:45,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:36:45,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:36:45,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:36:45,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:36:45,906 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) [2021-11-21 00:36:46,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:36:46,274 INFO L93 Difference]: Finished difference Result 8443 states and 13531 transitions. [2021-11-21 00:36:46,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:36:46,275 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 [2021-11-21 00:36:46,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:36:46,326 INFO L225 Difference]: With dead ends: 8443 [2021-11-21 00:36:46,327 INFO L226 Difference]: Without dead ends: 4691 [2021-11-21 00:36:46,357 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 [2021-11-21 00:36:46,369 INFO L933 BasicCegarLoop]: 725 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, 1230 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:36:46,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [564 Valid, 1230 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:36:46,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4691 states. [2021-11-21 00:36:46,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4691 to 4627. [2021-11-21 00:36:46,686 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) [2021-11-21 00:36:46,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4627 states to 4627 states and 7356 transitions. [2021-11-21 00:36:46,721 INFO L78 Accepts]: Start accepts. Automaton has 4627 states and 7356 transitions. Word has length 86 [2021-11-21 00:36:46,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:36:46,723 INFO L470 AbstractCegarLoop]: Abstraction has 4627 states and 7356 transitions. [2021-11-21 00:36:46,723 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) [2021-11-21 00:36:46,723 INFO L276 IsEmpty]: Start isEmpty. Operand 4627 states and 7356 transitions. [2021-11-21 00:36:46,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-21 00:36:46,732 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:36:46,732 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] [2021-11-21 00:36:46,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 00:36:46,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:36:46,959 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:36:46,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:36:46,960 INFO L85 PathProgramCache]: Analyzing trace with hash 943239580, now seen corresponding path program 1 times [2021-11-21 00:36:46,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:36:46,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637135186] [2021-11-21 00:36:46,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:36:46,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:36:47,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:36:47,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:36:47,203 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:36:47,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637135186] [2021-11-21 00:36:47,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637135186] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:36:47,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194486986] [2021-11-21 00:36:47,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:36:47,204 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:36:47,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:36:47,205 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:36:47,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 00:36:47,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:36:47,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 1833 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 00:36:47,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:36:47,870 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:36:47,870 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:36:47,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194486986] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:36:47,871 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:36:47,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2021-11-21 00:36:47,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740549422] [2021-11-21 00:36:47,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:36:47,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:36:47,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:36:47,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:36:47,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-11-21 00:36:47,873 INFO L87 Difference]: Start difference. First operand 4627 states and 7356 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) [2021-11-21 00:36:48,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:36:48,403 INFO L93 Difference]: Finished difference Result 9113 states and 14772 transitions. [2021-11-21 00:36:48,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:36:48,404 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 [2021-11-21 00:36:48,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:36:48,461 INFO L225 Difference]: With dead ends: 9113 [2021-11-21 00:36:48,461 INFO L226 Difference]: Without dead ends: 5707 [2021-11-21 00:36:48,531 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 [2021-11-21 00:36:48,531 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 [2021-11-21 00:36:48,532 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] [2021-11-21 00:36:48,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5707 states. [2021-11-21 00:36:48,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5707 to 5163. [2021-11-21 00:36:48,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5163 states, 3539 states have (on average 1.5241593670528397) internal successors, (5394), 3825 states have internal predecessors, (5394), 1323 states have call successors, (1323), 291 states have call predecessors, (1323), 300 states have return successors, (1557), 1197 states have call predecessors, (1557), 1315 states have call successors, (1557) [2021-11-21 00:36:48,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5163 states to 5163 states and 8274 transitions. [2021-11-21 00:36:48,881 INFO L78 Accepts]: Start accepts. Automaton has 5163 states and 8274 transitions. Word has length 93 [2021-11-21 00:36:48,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:36:48,881 INFO L470 AbstractCegarLoop]: Abstraction has 5163 states and 8274 transitions. [2021-11-21 00:36:48,882 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) [2021-11-21 00:36:48,882 INFO L276 IsEmpty]: Start isEmpty. Operand 5163 states and 8274 transitions. [2021-11-21 00:36:48,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-21 00:36:48,888 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:36:48,888 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] [2021-11-21 00:36:48,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 00:36:49,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-21 00:36:49,116 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:36:49,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:36:49,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1473716577, now seen corresponding path program 1 times [2021-11-21 00:36:49,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:36:49,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002735898] [2021-11-21 00:36:49,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:36:49,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:36:49,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:36:49,395 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 00:36:49,395 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:36:49,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002735898] [2021-11-21 00:36:49,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002735898] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:36:49,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482166206] [2021-11-21 00:36:49,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:36:49,396 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:36:49,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:36:49,397 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:36:49,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 00:36:49,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:36:49,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 1839 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 00:36:49,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:36:50,187 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:36:50,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:36:50,965 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 00:36:50,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482166206] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-21 00:36:50,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:36:50,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 22 [2021-11-21 00:36:50,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114445715] [2021-11-21 00:36:50,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:36:50,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-21 00:36:50,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:36:50,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-21 00:36:50,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-11-21 00:36:50,970 INFO L87 Difference]: Start difference. First operand 5163 states and 8274 transitions. Second operand has 9 states, 9 states have (on average 6.0) internal successors, (54), 9 states have internal predecessors, (54), 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) [2021-11-21 00:36:54,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:36:54,386 INFO L93 Difference]: Finished difference Result 9851 states and 15893 transitions. [2021-11-21 00:36:54,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-21 00:36:54,387 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 9 states have internal predecessors, (54), 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 94 [2021-11-21 00:36:54,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:36:54,462 INFO L225 Difference]: With dead ends: 9851 [2021-11-21 00:36:54,462 INFO L226 Difference]: Without dead ends: 5933 [2021-11-21 00:36:54,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 176 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2021-11-21 00:36:54,499 INFO L933 BasicCegarLoop]: 748 mSDtfsCounter, 1178 mSDsluCounter, 2161 mSDsCounter, 0 mSdLazyCounter, 2442 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1264 SdHoareTripleChecker+Valid, 2724 SdHoareTripleChecker+Invalid, 2649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 2442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-21 00:36:54,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1264 Valid, 2724 Invalid, 2649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 2442 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-11-21 00:36:54,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5933 states. [2021-11-21 00:36:54,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5933 to 4906. [2021-11-21 00:36:54,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4906 states, 3424 states have (on average 1.5073014018691588) internal successors, (5161), 3637 states have internal predecessors, (5161), 1140 states have call successors, (1140), 297 states have call predecessors, (1140), 341 states have return successors, (1466), 1074 states have call predecessors, (1466), 1132 states have call successors, (1466) [2021-11-21 00:36:55,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4906 states to 4906 states and 7767 transitions. [2021-11-21 00:36:55,073 INFO L78 Accepts]: Start accepts. Automaton has 4906 states and 7767 transitions. Word has length 94 [2021-11-21 00:36:55,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:36:55,073 INFO L470 AbstractCegarLoop]: Abstraction has 4906 states and 7767 transitions. [2021-11-21 00:36:55,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 9 states have internal predecessors, (54), 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) [2021-11-21 00:36:55,075 INFO L276 IsEmpty]: Start isEmpty. Operand 4906 states and 7767 transitions. [2021-11-21 00:36:55,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-21 00:36:55,083 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:36:55,083 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] [2021-11-21 00:36:55,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 00:36:55,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:36:55,302 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:36:55,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:36:55,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1218060022, now seen corresponding path program 1 times [2021-11-21 00:36:55,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:36:55,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63486238] [2021-11-21 00:36:55,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:36:55,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:36:55,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:36:55,528 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 00:36:55,529 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:36:55,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63486238] [2021-11-21 00:36:55,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63486238] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:36:55,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722093711] [2021-11-21 00:36:55,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:36:55,534 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:36:55,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:36:55,536 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:36:55,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 00:36:55,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:36:55,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 1838 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 00:36:55,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:36:56,295 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:36:56,296 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:36:56,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722093711] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:36:56,297 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:36:56,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 12 [2021-11-21 00:36:56,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72680921] [2021-11-21 00:36:56,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:36:56,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:36:56,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:36:56,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:36:56,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-21 00:36:56,299 INFO L87 Difference]: Start difference. First operand 4906 states and 7767 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-21 00:36:56,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:36:56,968 INFO L93 Difference]: Finished difference Result 10656 states and 16913 transitions. [2021-11-21 00:36:56,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:36:56,969 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 96 [2021-11-21 00:36:56,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:36:57,012 INFO L225 Difference]: With dead ends: 10656 [2021-11-21 00:36:57,012 INFO L226 Difference]: Without dead ends: 5762 [2021-11-21 00:36:57,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-11-21 00:36:57,041 INFO L933 BasicCegarLoop]: 694 mSDtfsCounter, 423 mSDsluCounter, 1128 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 1760 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:36:57,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [425 Valid, 1760 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:36:57,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5762 states. [2021-11-21 00:36:57,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5762 to 5601. [2021-11-21 00:36:57,459 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) [2021-11-21 00:36:57,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5601 states to 5601 states and 8790 transitions. [2021-11-21 00:36:57,625 INFO L78 Accepts]: Start accepts. Automaton has 5601 states and 8790 transitions. Word has length 96 [2021-11-21 00:36:57,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:36:57,628 INFO L470 AbstractCegarLoop]: Abstraction has 5601 states and 8790 transitions. [2021-11-21 00:36:57,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-21 00:36:57,628 INFO L276 IsEmpty]: Start isEmpty. Operand 5601 states and 8790 transitions. [2021-11-21 00:36:57,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-21 00:36:57,636 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:36:57,636 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] [2021-11-21 00:36:57,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-21 00:36:57,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:36:57,859 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:36:57,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:36:57,860 INFO L85 PathProgramCache]: Analyzing trace with hash -512368063, now seen corresponding path program 1 times [2021-11-21 00:36:57,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:36:57,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361420418] [2021-11-21 00:36:57,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:36:57,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:36:57,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:36:58,101 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 00:36:58,101 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:36:58,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361420418] [2021-11-21 00:36:58,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361420418] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:36:58,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499015051] [2021-11-21 00:36:58,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:36:58,103 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:36:58,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:36:58,104 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:36:58,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 00:36:58,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:36:58,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 1838 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 00:36:58,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:36:58,825 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-21 00:36:58,825 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:36:58,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499015051] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:36:58,825 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:36:58,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2021-11-21 00:36:58,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570018592] [2021-11-21 00:36:58,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:36:58,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:36:58,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:36:58,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:36:58,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-21 00:36:58,828 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) [2021-11-21 00:36:59,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:36:59,560 INFO L93 Difference]: Finished difference Result 10491 states and 16962 transitions. [2021-11-21 00:36:59,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:36:59,561 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 [2021-11-21 00:36:59,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:36:59,602 INFO L225 Difference]: With dead ends: 10491 [2021-11-21 00:36:59,602 INFO L226 Difference]: Without dead ends: 6141 [2021-11-21 00:36:59,695 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 [2021-11-21 00:36:59,696 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 [2021-11-21 00:36:59,696 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] [2021-11-21 00:36:59,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6141 states. [2021-11-21 00:37:00,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6141 to 6141. [2021-11-21 00:37:00,139 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) [2021-11-21 00:37:00,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6141 states to 6141 states and 9685 transitions. [2021-11-21 00:37:00,214 INFO L78 Accepts]: Start accepts. Automaton has 6141 states and 9685 transitions. Word has length 98 [2021-11-21 00:37:00,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:37:00,214 INFO L470 AbstractCegarLoop]: Abstraction has 6141 states and 9685 transitions. [2021-11-21 00:37:00,215 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) [2021-11-21 00:37:00,215 INFO L276 IsEmpty]: Start isEmpty. Operand 6141 states and 9685 transitions. [2021-11-21 00:37:00,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-21 00:37:00,221 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:37:00,222 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] [2021-11-21 00:37:00,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-21 00:37:00,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:37:00,448 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:37:00,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:37:00,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1239931009, now seen corresponding path program 1 times [2021-11-21 00:37:00,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:37:00,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602355572] [2021-11-21 00:37:00,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:37:00,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:37:00,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:37:00,691 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 00:37:00,691 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:37:00,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602355572] [2021-11-21 00:37:00,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602355572] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:37:00,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825900709] [2021-11-21 00:37:00,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:37:00,692 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:37:00,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:37:00,694 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:37:00,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 00:37:01,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:37:01,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 1838 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-21 00:37:01,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:37:01,663 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:37:01,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:37:02,299 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 00:37:02,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825900709] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-21 00:37:02,300 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:37:02,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10, 9] total 21 [2021-11-21 00:37:02,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345397313] [2021-11-21 00:37:02,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:37:02,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-21 00:37:02,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:37:02,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-21 00:37:02,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-11-21 00:37:02,302 INFO L87 Difference]: Start difference. First operand 6141 states and 9685 transitions. Second operand has 10 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 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) [2021-11-21 00:37:06,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:37:06,715 INFO L93 Difference]: Finished difference Result 17742 states and 30849 transitions. [2021-11-21 00:37:06,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-21 00:37:06,716 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 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 97 [2021-11-21 00:37:06,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:37:06,820 INFO L225 Difference]: With dead ends: 17742 [2021-11-21 00:37:06,820 INFO L226 Difference]: Without dead ends: 13587 [2021-11-21 00:37:06,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=1136, Unknown=0, NotChecked=0, Total=1332 [2021-11-21 00:37:06,870 INFO L933 BasicCegarLoop]: 713 mSDtfsCounter, 3249 mSDsluCounter, 2891 mSDsCounter, 0 mSdLazyCounter, 3159 mSolverCounterSat, 1588 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3346 SdHoareTripleChecker+Valid, 3436 SdHoareTripleChecker+Invalid, 4747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1588 IncrementalHoareTripleChecker+Valid, 3159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:37:06,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3346 Valid, 3436 Invalid, 4747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1588 Valid, 3159 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-11-21 00:37:06,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13587 states. [2021-11-21 00:37:07,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13587 to 12128. [2021-11-21 00:37:07,875 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) [2021-11-21 00:37:08,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12128 states to 12128 states and 19980 transitions. [2021-11-21 00:37:08,009 INFO L78 Accepts]: Start accepts. Automaton has 12128 states and 19980 transitions. Word has length 97 [2021-11-21 00:37:08,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:37:08,010 INFO L470 AbstractCegarLoop]: Abstraction has 12128 states and 19980 transitions. [2021-11-21 00:37:08,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 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) [2021-11-21 00:37:08,011 INFO L276 IsEmpty]: Start isEmpty. Operand 12128 states and 19980 transitions. [2021-11-21 00:37:08,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-21 00:37:08,016 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:37:08,017 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] [2021-11-21 00:37:08,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-21 00:37:08,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:37:08,232 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:37:08,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:37:08,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1755232925, now seen corresponding path program 1 times [2021-11-21 00:37:08,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:37:08,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181501521] [2021-11-21 00:37:08,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:37:08,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:37:08,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:37:08,435 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 00:37:08,436 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:37:08,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181501521] [2021-11-21 00:37:08,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181501521] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:37:08,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261230236] [2021-11-21 00:37:08,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:37:08,437 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:37:08,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:37:08,438 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:37:08,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-21 00:37:08,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:37:08,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 1855 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 00:37:08,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:37:09,142 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:37:09,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:37:09,638 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 00:37:09,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261230236] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-21 00:37:09,638 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:37:09,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 7] total 17 [2021-11-21 00:37:09,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388071281] [2021-11-21 00:37:09,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:37:09,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 00:37:09,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:37:09,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 00:37:09,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-11-21 00:37:09,641 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) [2021-11-21 00:37:12,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:37:12,189 INFO L93 Difference]: Finished difference Result 23755 states and 39714 transitions. [2021-11-21 00:37:12,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 00:37:12,192 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 [2021-11-21 00:37:12,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:37:12,310 INFO L225 Difference]: With dead ends: 23755 [2021-11-21 00:37:12,310 INFO L226 Difference]: Without dead ends: 13613 [2021-11-21 00:37:12,390 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 [2021-11-21 00:37:12,391 INFO L933 BasicCegarLoop]: 723 mSDtfsCounter, 949 mSDsluCounter, 1658 mSDsCounter, 0 mSdLazyCounter, 1862 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1047 SdHoareTripleChecker+Valid, 2266 SdHoareTripleChecker+Invalid, 2003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 1862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-21 00:37:12,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1047 Valid, 2266 Invalid, 2003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 1862 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-21 00:37:12,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13613 states. [2021-11-21 00:37:13,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13613 to 12116. [2021-11-21 00:37:13,429 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) [2021-11-21 00:37:13,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12116 states to 12116 states and 19932 transitions. [2021-11-21 00:37:13,537 INFO L78 Accepts]: Start accepts. Automaton has 12116 states and 19932 transitions. Word has length 101 [2021-11-21 00:37:13,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:37:13,538 INFO L470 AbstractCegarLoop]: Abstraction has 12116 states and 19932 transitions. [2021-11-21 00:37:13,538 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) [2021-11-21 00:37:13,539 INFO L276 IsEmpty]: Start isEmpty. Operand 12116 states and 19932 transitions. [2021-11-21 00:37:13,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-21 00:37:13,551 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:37:13,551 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:37:13,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-21 00:37:13,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-21 00:37:13,780 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:37:13,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:37:13,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1410860881, now seen corresponding path program 1 times [2021-11-21 00:37:13,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:37:13,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829616285] [2021-11-21 00:37:13,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:37:13,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:37:13,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:37:13,999 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-21 00:37:13,999 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:37:14,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829616285] [2021-11-21 00:37:14,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829616285] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:37:14,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712631645] [2021-11-21 00:37:14,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:37:14,001 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:37:14,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:37:14,002 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:37:14,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-21 00:37:14,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:37:14,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 1964 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 00:37:14,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:37:14,834 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 00:37:14,835 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:37:14,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712631645] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:37:14,835 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:37:14,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2021-11-21 00:37:14,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961552106] [2021-11-21 00:37:14,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:37:14,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 00:37:14,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:37:14,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 00:37:14,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-11-21 00:37:14,837 INFO L87 Difference]: Start difference. First operand 12116 states and 19932 transitions. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 5 states have internal predecessors, (78), 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) [2021-11-21 00:37:16,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:37:16,062 INFO L93 Difference]: Finished difference Result 23527 states and 40077 transitions. [2021-11-21 00:37:16,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:37:16,063 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 5 states have internal predecessors, (78), 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 130 [2021-11-21 00:37:16,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:37:16,208 INFO L225 Difference]: With dead ends: 23527 [2021-11-21 00:37:16,208 INFO L226 Difference]: Without dead ends: 12680 [2021-11-21 00:37:16,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-11-21 00:37:16,316 INFO L933 BasicCegarLoop]: 605 mSDtfsCounter, 2 mSDsluCounter, 3182 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 3599 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 [2021-11-21 00:37:16,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 3599 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:37:16,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12680 states. [2021-11-21 00:37:17,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12680 to 12554. [2021-11-21 00:37:17,408 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) [2021-11-21 00:37:17,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12554 states to 12554 states and 21144 transitions. [2021-11-21 00:37:17,528 INFO L78 Accepts]: Start accepts. Automaton has 12554 states and 21144 transitions. Word has length 130 [2021-11-21 00:37:17,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:37:17,528 INFO L470 AbstractCegarLoop]: Abstraction has 12554 states and 21144 transitions. [2021-11-21 00:37:17,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 5 states have internal predecessors, (78), 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) [2021-11-21 00:37:17,529 INFO L276 IsEmpty]: Start isEmpty. Operand 12554 states and 21144 transitions. [2021-11-21 00:37:17,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-21 00:37:17,539 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:37:17,540 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] [2021-11-21 00:37:17,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-21 00:37:17,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-21 00:37:17,768 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:37:17,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:37:17,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1983231857, now seen corresponding path program 1 times [2021-11-21 00:37:17,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:37:17,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68227459] [2021-11-21 00:37:17,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:37:17,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:37:17,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:37:17,979 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-21 00:37:17,979 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:37:17,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68227459] [2021-11-21 00:37:17,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68227459] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:37:17,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445077836] [2021-11-21 00:37:17,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:37:17,980 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:37:17,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:37:17,981 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:37:18,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-21 00:37:18,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:37:18,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 1965 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 00:37:18,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:37:18,837 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 00:37:18,837 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:37:18,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445077836] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:37:18,838 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:37:18,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2021-11-21 00:37:18,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138320529] [2021-11-21 00:37:18,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:37:18,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 00:37:18,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:37:18,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 00:37:18,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-11-21 00:37:18,840 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) [2021-11-21 00:37:19,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:37:19,719 INFO L93 Difference]: Finished difference Result 24175 states and 41743 transitions. [2021-11-21 00:37:19,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:37:19,719 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 [2021-11-21 00:37:19,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:37:19,840 INFO L225 Difference]: With dead ends: 24175 [2021-11-21 00:37:19,840 INFO L226 Difference]: Without dead ends: 12902 [2021-11-21 00:37:19,930 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 [2021-11-21 00:37:19,931 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, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:37:19,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 3619 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 00:37:19,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12902 states. [2021-11-21 00:37:20,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12902 to 12608. [2021-11-21 00:37:20,821 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) [2021-11-21 00:37:20,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12608 states to 12608 states and 21198 transitions. [2021-11-21 00:37:20,942 INFO L78 Accepts]: Start accepts. Automaton has 12608 states and 21198 transitions. Word has length 131 [2021-11-21 00:37:20,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:37:20,943 INFO L470 AbstractCegarLoop]: Abstraction has 12608 states and 21198 transitions. [2021-11-21 00:37:20,944 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) [2021-11-21 00:37:20,944 INFO L276 IsEmpty]: Start isEmpty. Operand 12608 states and 21198 transitions. [2021-11-21 00:37:20,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-21 00:37:20,955 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:37:20,955 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] [2021-11-21 00:37:21,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-21 00:37:21,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:37:21,180 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:37:21,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:37:21,180 INFO L85 PathProgramCache]: Analyzing trace with hash 949407477, now seen corresponding path program 1 times [2021-11-21 00:37:21,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:37:21,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144689886] [2021-11-21 00:37:21,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:37:21,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:37:21,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:37:21,389 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-21 00:37:21,389 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:37:21,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144689886] [2021-11-21 00:37:21,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144689886] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:37:21,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866097339] [2021-11-21 00:37:21,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:37:21,390 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:37:21,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:37:21,393 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:37:21,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-21 00:37:21,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:37:22,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 1966 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:37:22,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:37:22,294 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-21 00:37:22,295 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:37:22,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866097339] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:37:22,295 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:37:22,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2021-11-21 00:37:22,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313974674] [2021-11-21 00:37:22,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:37:22,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:37:22,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:37:22,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:37:22,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-11-21 00:37:22,298 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) [2021-11-21 00:37:23,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:37:23,189 INFO L93 Difference]: Finished difference Result 26245 states and 47262 transitions. [2021-11-21 00:37:23,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:37:23,189 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 [2021-11-21 00:37:23,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:37:23,291 INFO L225 Difference]: With dead ends: 26245 [2021-11-21 00:37:23,291 INFO L226 Difference]: Without dead ends: 14888 [2021-11-21 00:37:23,376 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 [2021-11-21 00:37:23,377 INFO L933 BasicCegarLoop]: 654 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, 1242 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 [2021-11-21 00:37:23,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 1242 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:37:23,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14888 states. [2021-11-21 00:37:24,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14888 to 14131. [2021-11-21 00:37:24,361 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) [2021-11-21 00:37:24,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14131 states to 14131 states and 23599 transitions. [2021-11-21 00:37:24,465 INFO L78 Accepts]: Start accepts. Automaton has 14131 states and 23599 transitions. Word has length 144 [2021-11-21 00:37:24,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:37:24,466 INFO L470 AbstractCegarLoop]: Abstraction has 14131 states and 23599 transitions. [2021-11-21 00:37:24,466 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) [2021-11-21 00:37:24,466 INFO L276 IsEmpty]: Start isEmpty. Operand 14131 states and 23599 transitions. [2021-11-21 00:37:24,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-21 00:37:24,475 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:37:24,475 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-11-21 00:37:24,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-21 00:37:24,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:37:24,692 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:37:24,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:37:24,692 INFO L85 PathProgramCache]: Analyzing trace with hash -431026965, now seen corresponding path program 1 times [2021-11-21 00:37:24,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:37:24,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999010953] [2021-11-21 00:37:24,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:37:24,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:37:24,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:37:24,852 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-21 00:37:24,852 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:37:24,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999010953] [2021-11-21 00:37:24,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999010953] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:37:24,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734724147] [2021-11-21 00:37:24,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:37:24,853 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:37:24,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:37:24,860 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:37:24,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-21 00:37:25,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:37:25,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 1961 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 00:37:25,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:37:25,506 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 00:37:25,506 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:37:25,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734724147] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:37:25,506 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:37:25,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2021-11-21 00:37:25,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344432566] [2021-11-21 00:37:25,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:37:25,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 00:37:25,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:37:25,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 00:37:25,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-11-21 00:37:25,508 INFO L87 Difference]: Start difference. First operand 14131 states and 23599 transitions. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 5 states have internal predecessors, (84), 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) [2021-11-21 00:37:26,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:37:26,251 INFO L93 Difference]: Finished difference Result 27329 states and 46653 transitions. [2021-11-21 00:37:26,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:37:26,252 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 5 states have internal predecessors, (84), 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 134 [2021-11-21 00:37:26,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:37:26,358 INFO L225 Difference]: With dead ends: 27329 [2021-11-21 00:37:26,358 INFO L226 Difference]: Without dead ends: 14479 [2021-11-21 00:37:26,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-11-21 00:37:26,442 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, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:37:26,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 3619 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:37:26,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14479 states. [2021-11-21 00:37:27,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14479 to 14185. [2021-11-21 00:37:27,504 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) [2021-11-21 00:37:27,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14185 states to 14185 states and 23653 transitions. [2021-11-21 00:37:27,604 INFO L78 Accepts]: Start accepts. Automaton has 14185 states and 23653 transitions. Word has length 134 [2021-11-21 00:37:27,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:37:27,604 INFO L470 AbstractCegarLoop]: Abstraction has 14185 states and 23653 transitions. [2021-11-21 00:37:27,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 5 states have internal predecessors, (84), 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) [2021-11-21 00:37:27,605 INFO L276 IsEmpty]: Start isEmpty. Operand 14185 states and 23653 transitions. [2021-11-21 00:37:27,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-21 00:37:27,619 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:37:27,619 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:37:27,776 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-11-21 00:37:27,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-21 00:37:27,960 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:37:27,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:37:27,961 INFO L85 PathProgramCache]: Analyzing trace with hash 610099067, now seen corresponding path program 1 times [2021-11-21 00:37:27,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:37:27,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821268841] [2021-11-21 00:37:27,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:37:27,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:37:28,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:37:28,124 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-21 00:37:28,125 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:37:28,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821268841] [2021-11-21 00:37:28,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821268841] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:37:28,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231759763] [2021-11-21 00:37:28,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:37:28,125 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:37:28,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:37:28,126 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:37:28,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-21 00:37:28,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:37:28,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 1976 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 00:37:28,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:37:28,757 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 00:37:28,757 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:37:28,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231759763] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:37:28,758 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:37:28,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2021-11-21 00:37:28,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108930780] [2021-11-21 00:37:28,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:37:28,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:37:28,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:37:28,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:37:28,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-11-21 00:37:28,761 INFO L87 Difference]: Start difference. First operand 14185 states and 23653 transitions. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-21 00:37:29,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:37:29,800 INFO L93 Difference]: Finished difference Result 28292 states and 48404 transitions. [2021-11-21 00:37:29,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:37:29,800 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 152 [2021-11-21 00:37:29,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:37:29,894 INFO L225 Difference]: With dead ends: 28292 [2021-11-21 00:37:29,894 INFO L226 Difference]: Without dead ends: 12287 [2021-11-21 00:37:29,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-11-21 00:37:29,997 INFO L933 BasicCegarLoop]: 637 mSDtfsCounter, 220 mSDsluCounter, 2426 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2021-11-21 00:37:29,998 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] [2021-11-21 00:37:30,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12287 states. [2021-11-21 00:37:30,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12287 to 12267. [2021-11-21 00:37:30,915 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) [2021-11-21 00:37:30,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12267 states to 12267 states and 20178 transitions. [2021-11-21 00:37:30,994 INFO L78 Accepts]: Start accepts. Automaton has 12267 states and 20178 transitions. Word has length 152 [2021-11-21 00:37:30,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:37:30,994 INFO L470 AbstractCegarLoop]: Abstraction has 12267 states and 20178 transitions. [2021-11-21 00:37:30,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-21 00:37:30,994 INFO L276 IsEmpty]: Start isEmpty. Operand 12267 states and 20178 transitions. [2021-11-21 00:37:31,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-21 00:37:31,016 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:37:31,016 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] [2021-11-21 00:37:31,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-21 00:37:31,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-21 00:37:31,232 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:37:31,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:37:31,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1591190577, now seen corresponding path program 1 times [2021-11-21 00:37:31,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:37:31,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864577685] [2021-11-21 00:37:31,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:37:31,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:37:31,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:37:31,484 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-21 00:37:31,484 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:37:31,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864577685] [2021-11-21 00:37:31,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864577685] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:37:31,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294062839] [2021-11-21 00:37:31,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:37:31,485 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:37:31,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:37:31,492 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:37:31,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-21 00:37:31,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:37:31,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 1975 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 00:37:31,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:37:32,199 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 00:37:32,200 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:37:32,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294062839] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:37:32,200 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:37:32,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2021-11-21 00:37:32,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47245407] [2021-11-21 00:37:32,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:37:32,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:37:32,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:37:32,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:37:32,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-11-21 00:37:32,202 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) [2021-11-21 00:37:33,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:37:33,459 INFO L93 Difference]: Finished difference Result 26876 states and 45258 transitions. [2021-11-21 00:37:33,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:37:33,459 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 [2021-11-21 00:37:33,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:37:33,581 INFO L225 Difference]: With dead ends: 26876 [2021-11-21 00:37:33,581 INFO L226 Difference]: Without dead ends: 13571 [2021-11-21 00:37:33,700 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 [2021-11-21 00:37:33,702 INFO L933 BasicCegarLoop]: 631 mSDtfsCounter, 279 mSDsluCounter, 2414 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 2897 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:37:33,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 2897 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 00:37:33,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13571 states. [2021-11-21 00:37:34,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13571 to 13457. [2021-11-21 00:37:34,680 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) [2021-11-21 00:37:34,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13457 states to 13457 states and 21436 transitions. [2021-11-21 00:37:34,902 INFO L78 Accepts]: Start accepts. Automaton has 13457 states and 21436 transitions. Word has length 142 [2021-11-21 00:37:34,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:37:34,903 INFO L470 AbstractCegarLoop]: Abstraction has 13457 states and 21436 transitions. [2021-11-21 00:37:34,904 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) [2021-11-21 00:37:34,904 INFO L276 IsEmpty]: Start isEmpty. Operand 13457 states and 21436 transitions. [2021-11-21 00:37:34,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-21 00:37:34,918 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:37:34,919 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-11-21 00:37:34,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-21 00:37:35,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:37:35,132 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:37:35,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:37:35,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1625937931, now seen corresponding path program 1 times [2021-11-21 00:37:35,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:37:35,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369887131] [2021-11-21 00:37:35,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:37:35,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:37:35,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:37:35,362 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-21 00:37:35,362 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:37:35,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369887131] [2021-11-21 00:37:35,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369887131] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:37:35,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913078106] [2021-11-21 00:37:35,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:37:35,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:37:35,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:37:35,372 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:37:35,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-21 00:37:35,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:37:35,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 1974 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-21 00:37:35,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:37:36,439 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-21 00:37:36,439 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:37:36,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913078106] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:37:36,440 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:37:36,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 11 [2021-11-21 00:37:36,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036577700] [2021-11-21 00:37:36,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:37:36,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:37:36,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:37:36,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:37:36,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-21 00:37:36,442 INFO L87 Difference]: Start difference. First operand 13457 states and 21436 transitions. Second operand has 6 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 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) [2021-11-21 00:37:38,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:37:38,713 INFO L93 Difference]: Finished difference Result 35635 states and 60590 transitions. [2021-11-21 00:37:38,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:37:38,714 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 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 146 [2021-11-21 00:37:38,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:37:38,927 INFO L225 Difference]: With dead ends: 35635 [2021-11-21 00:37:38,927 INFO L226 Difference]: Without dead ends: 22110 [2021-11-21 00:37:39,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-11-21 00:37:39,060 INFO L933 BasicCegarLoop]: 776 mSDtfsCounter, 626 mSDsluCounter, 2645 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 645 SdHoareTripleChecker+Valid, 3277 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-21 00:37:39,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [645 Valid, 3277 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-21 00:37:39,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22110 states. [2021-11-21 00:37:40,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22110 to 20793. [2021-11-21 00:37:40,630 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) [2021-11-21 00:37:40,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20793 states to 20793 states and 34173 transitions. [2021-11-21 00:37:40,775 INFO L78 Accepts]: Start accepts. Automaton has 20793 states and 34173 transitions. Word has length 146 [2021-11-21 00:37:40,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:37:40,776 INFO L470 AbstractCegarLoop]: Abstraction has 20793 states and 34173 transitions. [2021-11-21 00:37:40,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 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) [2021-11-21 00:37:40,776 INFO L276 IsEmpty]: Start isEmpty. Operand 20793 states and 34173 transitions. [2021-11-21 00:37:40,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-21 00:37:40,793 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:37:40,793 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] [2021-11-21 00:37:40,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-21 00:37:41,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-21 00:37:41,008 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:37:41,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:37:41,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1829647549, now seen corresponding path program 1 times [2021-11-21 00:37:41,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:37:41,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165443073] [2021-11-21 00:37:41,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:37:41,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:37:41,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:37:41,284 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-21 00:37:41,285 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:37:41,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165443073] [2021-11-21 00:37:41,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165443073] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:37:41,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56910582] [2021-11-21 00:37:41,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:37:41,286 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:37:41,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:37:41,290 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:37:41,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-21 00:37:41,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:37:41,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 1990 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 00:37:41,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:37:43,460 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-21 00:37:43,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:37:45,065 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-21 00:37:45,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56910582] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-21 00:37:45,066 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:37:45,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 16 [2021-11-21 00:37:45,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232231542] [2021-11-21 00:37:45,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:37:45,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:37:45,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:37:45,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:37:45,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-11-21 00:37:45,070 INFO L87 Difference]: Start difference. First operand 20793 states and 34173 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) [2021-11-21 00:37:51,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:37:51,132 INFO L93 Difference]: Finished difference Result 50736 states and 87361 transitions. [2021-11-21 00:37:51,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 00:37:51,133 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 [2021-11-21 00:37:51,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:37:51,311 INFO L225 Difference]: With dead ends: 50736 [2021-11-21 00:37:51,311 INFO L226 Difference]: Without dead ends: 28959 [2021-11-21 00:37:51,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-11-21 00:37:51,425 INFO L933 BasicCegarLoop]: 888 mSDtfsCounter, 1372 mSDsluCounter, 867 mSDsCounter, 0 mSdLazyCounter, 2216 mSolverCounterSat, 453 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1467 SdHoareTripleChecker+Valid, 1693 SdHoareTripleChecker+Invalid, 2669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 453 IncrementalHoareTripleChecker+Valid, 2216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:37:51,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1467 Valid, 1693 Invalid, 2669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [453 Valid, 2216 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-11-21 00:37:51,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28959 states. [2021-11-21 00:37:53,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28959 to 23982. [2021-11-21 00:37:53,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23982 states, 17338 states have (on average 1.4396700888222402) internal successors, (24961), 18304 states have internal predecessors, (24961), 4887 states have call successors, (4887), 1152 states have call predecessors, (4887), 1756 states have return successors, (9936), 4995 states have call predecessors, (9936), 4865 states have call successors, (9936) [2021-11-21 00:37:53,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23982 states to 23982 states and 39784 transitions. [2021-11-21 00:37:53,626 INFO L78 Accepts]: Start accepts. Automaton has 23982 states and 39784 transitions. Word has length 152 [2021-11-21 00:37:53,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:37:53,626 INFO L470 AbstractCegarLoop]: Abstraction has 23982 states and 39784 transitions. [2021-11-21 00:37:53,627 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) [2021-11-21 00:37:53,627 INFO L276 IsEmpty]: Start isEmpty. Operand 23982 states and 39784 transitions. [2021-11-21 00:37:53,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-21 00:37:53,636 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:37:53,636 INFO L514 BasicCegarLoop]: trace histogram [4, 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] [2021-11-21 00:37:53,661 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-11-21 00:37:53,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:37:53,837 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:37:53,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:37:53,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1618176045, now seen corresponding path program 1 times [2021-11-21 00:37:53,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:37:53,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740742283] [2021-11-21 00:37:53,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:37:53,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:37:53,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:37:54,040 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-21 00:37:54,041 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:37:54,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740742283] [2021-11-21 00:37:54,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740742283] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:37:54,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268795074] [2021-11-21 00:37:54,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:37:54,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:37:54,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:37:54,043 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:37:54,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d389856-1f1b-4f8a-bc06-9e751cd29a15/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-21 00:37:54,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:37:54,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 1996 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-21 00:37:54,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:37:55,309 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-21 00:37:55,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:37:56,492 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-21 00:37:56,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268795074] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:37:56,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [497915873] [2021-11-21 00:37:56,540 INFO L159 IcfgInterpreter]: Started Sifa with 132 locations of interest [2021-11-21 00:37:56,540 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:37:56,550 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:37:56,560 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:37:56,560 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:40:10,882 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 580 for LOIs [2021-11-21 00:43:56,515 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 73 for LOIs [2021-11-21 00:43:57,033 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 605 for LOIs [2021-11-21 00:45:01,857 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 579 for LOIs [2021-11-21 00:45:09,319 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 443 for LOIs [2021-11-21 00:45:14,056 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 454 for LOIs [2021-11-21 00:45:20,032 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 579 for LOIs [2021-11-21 00:47:28,749 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 600 for LOIs [2021-11-21 00:47:38,667 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 511 for LOIs [2021-11-21 00:47:44,401 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:48:12,648 WARN L227 SmtUtils]: Spent 6.80s on a formula simplification. DAG size of input: 651 DAG size of output: 598 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 00:48:40,864 WARN L227 SmtUtils]: Spent 5.50s on a formula simplification. DAG size of input: 620 DAG size of output: 593 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 00:48:52,482 WARN L227 SmtUtils]: Spent 5.83s on a formula simplification. DAG size of input: 633 DAG size of output: 600 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 00:49:02,588 WARN L227 SmtUtils]: Spent 5.89s on a formula simplification. DAG size of input: 634 DAG size of output: 602 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)