./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product29.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_4a00f06b-cda1-4395-886c-8a43f331928f/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a00f06b-cda1-4395-886c-8a43f331928f/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_4a00f06b-cda1-4395-886c-8a43f331928f/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a00f06b-cda1-4395-886c-8a43f331928f/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product29.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a00f06b-cda1-4395-886c-8a43f331928f/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_4a00f06b-cda1-4395-886c-8a43f331928f/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 a9d4bfafe2ee2b10c7451875462462bdbc63aaee25e1868c3faa4756fb5ebfc5 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:14:01,121 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:14:01,123 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:14:01,166 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:14:01,167 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:14:01,168 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:14:01,170 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:14:01,172 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:14:01,174 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:14:01,175 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:14:01,177 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:14:01,178 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:14:01,179 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:14:01,180 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:14:01,182 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:14:01,183 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:14:01,184 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:14:01,185 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:14:01,187 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:14:01,190 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:14:01,192 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:14:01,195 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:14:01,196 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:14:01,197 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:14:01,200 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:14:01,201 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:14:01,201 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:14:01,202 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:14:01,203 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:14:01,204 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:14:01,205 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:14:01,205 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:14:01,206 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:14:01,212 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:14:01,215 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:14:01,215 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:14:01,216 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:14:01,216 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:14:01,216 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:14:01,218 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:14:01,218 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:14:01,219 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a00f06b-cda1-4395-886c-8a43f331928f/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 01:14:01,268 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:14:01,269 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:14:01,269 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:14:01,270 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:14:01,271 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:14:01,277 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:14:01,277 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:14:01,278 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:14:01,278 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:14:01,278 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:14:01,279 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:14:01,280 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:14:01,280 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:14:01,280 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:14:01,280 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:14:01,281 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:14:01,281 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:14:01,281 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:14:01,283 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:14:01,283 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:14:01,283 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:14:01,283 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:14:01,284 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:14:01,284 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:14:01,284 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:14:01,284 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:14:01,287 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:14:01,287 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:14:01,287 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:14:01,287 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:14:01,288 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:14:01,288 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:14:01,288 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:14:01,289 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:14:01,289 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:14:01,289 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:14:01,289 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:14:01,290 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:14:01,290 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:14:01,290 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:14:01,290 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:14:01,291 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_4a00f06b-cda1-4395-886c-8a43f331928f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a00f06b-cda1-4395-886c-8a43f331928f/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a9d4bfafe2ee2b10c7451875462462bdbc63aaee25e1868c3faa4756fb5ebfc5 [2021-11-21 01:14:01,619 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:14:01,649 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:14:01,651 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:14:01,653 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:14:01,653 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:14:01,654 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a00f06b-cda1-4395-886c-8a43f331928f/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/product-lines/elevator_spec2_product29.cil.c [2021-11-21 01:14:01,739 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a00f06b-cda1-4395-886c-8a43f331928f/bin/utaipan-TEXQjIfE4P/data/1c0534f89/88fd9cfb95b44a83bd79a64cf1f9d7ce/FLAGbf4c99a7e [2021-11-21 01:14:02,414 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:14:02,414 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a00f06b-cda1-4395-886c-8a43f331928f/sv-benchmarks/c/product-lines/elevator_spec2_product29.cil.c [2021-11-21 01:14:02,462 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a00f06b-cda1-4395-886c-8a43f331928f/bin/utaipan-TEXQjIfE4P/data/1c0534f89/88fd9cfb95b44a83bd79a64cf1f9d7ce/FLAGbf4c99a7e [2021-11-21 01:14:02,731 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a00f06b-cda1-4395-886c-8a43f331928f/bin/utaipan-TEXQjIfE4P/data/1c0534f89/88fd9cfb95b44a83bd79a64cf1f9d7ce [2021-11-21 01:14:02,733 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:14:02,736 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:14:02,738 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:14:02,738 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:14:02,741 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:14:02,741 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:14:02" (1/1) ... [2021-11-21 01:14:02,742 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c0541ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:02, skipping insertion in model container [2021-11-21 01:14:02,742 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:14:02" (1/1) ... [2021-11-21 01:14:02,749 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:14:02,814 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:14:03,066 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_4a00f06b-cda1-4395-886c-8a43f331928f/sv-benchmarks/c/product-lines/elevator_spec2_product29.cil.c[17414,17427] [2021-11-21 01:14:03,370 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:14:03,380 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:14:03,422 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_4a00f06b-cda1-4395-886c-8a43f331928f/sv-benchmarks/c/product-lines/elevator_spec2_product29.cil.c[17414,17427] [2021-11-21 01:14:03,553 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:14:03,597 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:14:03,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:03 WrapperNode [2021-11-21 01:14:03,598 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:14:03,599 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:14:03,599 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:14:03,599 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:14:03,606 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:03" (1/1) ... [2021-11-21 01:14:03,664 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:03" (1/1) ... [2021-11-21 01:14:03,712 INFO L137 Inliner]: procedures = 93, calls = 341, calls flagged for inlining = 27, calls inlined = 24, statements flattened = 905 [2021-11-21 01:14:03,712 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:14:03,713 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:14:03,713 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:14:03,713 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:14:03,721 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:03" (1/1) ... [2021-11-21 01:14:03,721 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:03" (1/1) ... [2021-11-21 01:14:03,728 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:03" (1/1) ... [2021-11-21 01:14:03,728 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:03" (1/1) ... [2021-11-21 01:14:03,749 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:03" (1/1) ... [2021-11-21 01:14:03,763 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:03" (1/1) ... [2021-11-21 01:14:03,767 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:03" (1/1) ... [2021-11-21 01:14:03,776 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:14:03,777 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:14:03,777 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:14:03,777 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:14:03,778 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:03" (1/1) ... [2021-11-21 01:14:03,794 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:14:03,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a00f06b-cda1-4395-886c-8a43f331928f/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:14:03,832 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a00f06b-cda1-4395-886c-8a43f331928f/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:14:03,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a00f06b-cda1-4395-886c-8a43f331928f/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:14:03,901 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:14:03,901 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-21 01:14:03,901 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-21 01:14:03,902 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-21 01:14:03,902 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-21 01:14:03,902 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-21 01:14:03,902 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-21 01:14:03,902 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-21 01:14:03,902 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-21 01:14:03,903 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-21 01:14:03,903 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-21 01:14:03,903 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2021-11-21 01:14:03,903 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2021-11-21 01:14:03,903 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-21 01:14:03,903 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-21 01:14:03,904 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-21 01:14:03,904 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-21 01:14:03,904 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-21 01:14:03,904 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-21 01:14:03,904 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-21 01:14:03,904 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-21 01:14:03,904 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-21 01:14:03,905 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-21 01:14:03,905 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-21 01:14:03,905 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-21 01:14:03,905 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-21 01:14:03,905 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-21 01:14:03,905 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-21 01:14:03,906 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-21 01:14:03,906 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-21 01:14:03,906 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-21 01:14:03,907 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-21 01:14:03,907 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-21 01:14:03,907 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-21 01:14:03,907 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-21 01:14:03,907 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-21 01:14:03,908 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-21 01:14:03,908 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-21 01:14:03,908 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-21 01:14:03,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:14:03,908 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-21 01:14:03,908 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-21 01:14:03,909 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-21 01:14:03,909 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-21 01:14:03,909 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-21 01:14:03,910 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-21 01:14:03,910 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-21 01:14:03,911 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-21 01:14:03,911 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:14:03,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:14:03,912 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-21 01:14:03,913 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-21 01:14:04,125 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:14:04,127 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:14:05,124 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:14:05,815 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:14:05,816 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-21 01:14:05,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:14:05 BoogieIcfgContainer [2021-11-21 01:14:05,821 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:14:05,823 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:14:05,823 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:14:05,826 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:14:05,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:14:02" (1/3) ... [2021-11-21 01:14:05,827 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4962e482 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:14:05, skipping insertion in model container [2021-11-21 01:14:05,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:14:03" (2/3) ... [2021-11-21 01:14:05,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4962e482 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:14:05, skipping insertion in model container [2021-11-21 01:14:05,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:14:05" (3/3) ... [2021-11-21 01:14:05,831 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product29.cil.c [2021-11-21 01:14:05,839 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:14:05,839 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:14:05,907 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:14:05,916 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 01:14:05,916 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:14:05,966 INFO L276 IsEmpty]: Start isEmpty. Operand has 374 states, 253 states have (on average 1.5968379446640317) internal successors, (404), 274 states have internal predecessors, (404), 95 states have call successors, (95), 24 states have call predecessors, (95), 24 states have return successors, (95), 89 states have call predecessors, (95), 95 states have call successors, (95) [2021-11-21 01:14:05,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-21 01:14:05,997 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:14:05,999 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:14:05,999 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:14:06,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:14:06,005 INFO L85 PathProgramCache]: Analyzing trace with hash -847922989, now seen corresponding path program 1 times [2021-11-21 01:14:06,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:14:06,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686708543] [2021-11-21 01:14:06,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:14:06,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:14:06,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:14:06,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:14:06,464 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:14:06,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686708543] [2021-11-21 01:14:06,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686708543] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:14:06,466 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:14:06,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:14:06,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566838824] [2021-11-21 01:14:06,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:14:06,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:14:06,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:14:06,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:14:06,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:14:06,513 INFO L87 Difference]: Start difference. First operand has 374 states, 253 states have (on average 1.5968379446640317) internal successors, (404), 274 states have internal predecessors, (404), 95 states have call successors, (95), 24 states have call predecessors, (95), 24 states have return successors, (95), 89 states have call predecessors, (95), 95 states have call successors, (95) Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-21 01:14:07,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:14:07,078 INFO L93 Difference]: Finished difference Result 844 states and 1368 transitions. [2021-11-21 01:14:07,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:14:07,080 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 65 [2021-11-21 01:14:07,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:14:07,112 INFO L225 Difference]: With dead ends: 844 [2021-11-21 01:14:07,112 INFO L226 Difference]: Without dead ends: 483 [2021-11-21 01:14:07,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:14:07,128 INFO L933 BasicCegarLoop]: 646 mSDtfsCounter, 282 mSDsluCounter, 1778 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 2315 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:14:07,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 2315 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 01:14:07,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-11-21 01:14:07,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 373. [2021-11-21 01:14:07,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 254 states have (on average 1.578740157480315) internal successors, (401), 273 states have internal predecessors, (401), 95 states have call successors, (95), 24 states have call predecessors, (95), 23 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2021-11-21 01:14:07,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 586 transitions. [2021-11-21 01:14:07,257 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 586 transitions. Word has length 65 [2021-11-21 01:14:07,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:14:07,258 INFO L470 AbstractCegarLoop]: Abstraction has 373 states and 586 transitions. [2021-11-21 01:14:07,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-21 01:14:07,259 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 586 transitions. [2021-11-21 01:14:07,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-21 01:14:07,271 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:14:07,272 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] [2021-11-21 01:14:07,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:14:07,273 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:14:07,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:14:07,274 INFO L85 PathProgramCache]: Analyzing trace with hash 249604261, now seen corresponding path program 1 times [2021-11-21 01:14:07,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:14:07,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815582066] [2021-11-21 01:14:07,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:14:07,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:14:07,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:14:07,491 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 01:14:07,492 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:14:07,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815582066] [2021-11-21 01:14:07,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815582066] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:14:07,493 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:14:07,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-21 01:14:07,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608687329] [2021-11-21 01:14:07,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:14:07,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-21 01:14:07,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:14:07,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-21 01:14:07,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-21 01:14:07,496 INFO L87 Difference]: Start difference. First operand 373 states and 586 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 6 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) [2021-11-21 01:14:10,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:14:10,475 INFO L93 Difference]: Finished difference Result 1280 states and 2045 transitions. [2021-11-21 01:14:10,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-21 01:14:10,476 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 6 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) Word has length 68 [2021-11-21 01:14:10,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:14:10,484 INFO L225 Difference]: With dead ends: 1280 [2021-11-21 01:14:10,484 INFO L226 Difference]: Without dead ends: 923 [2021-11-21 01:14:10,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2021-11-21 01:14:10,488 INFO L933 BasicCegarLoop]: 775 mSDtfsCounter, 1729 mSDsluCounter, 2441 mSDsCounter, 0 mSdLazyCounter, 3373 mSolverCounterSat, 588 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1794 SdHoareTripleChecker+Valid, 3083 SdHoareTripleChecker+Invalid, 3961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 588 IncrementalHoareTripleChecker+Valid, 3373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:14:10,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1794 Valid, 3083 Invalid, 3961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [588 Valid, 3373 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-21 01:14:10,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2021-11-21 01:14:10,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 867. [2021-11-21 01:14:10,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 611 states have (on average 1.5973813420621932) internal successors, (976), 642 states have internal predecessors, (976), 203 states have call successors, (203), 48 states have call predecessors, (203), 52 states have return successors, (210), 201 states have call predecessors, (210), 198 states have call successors, (210) [2021-11-21 01:14:10,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 1389 transitions. [2021-11-21 01:14:10,566 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 1389 transitions. Word has length 68 [2021-11-21 01:14:10,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:14:10,566 INFO L470 AbstractCegarLoop]: Abstraction has 867 states and 1389 transitions. [2021-11-21 01:14:10,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 6 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) [2021-11-21 01:14:10,567 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 1389 transitions. [2021-11-21 01:14:10,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-21 01:14:10,570 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:14:10,571 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] [2021-11-21 01:14:10,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 01:14:10,571 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:14:10,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:14:10,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1662862818, now seen corresponding path program 1 times [2021-11-21 01:14:10,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:14:10,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427280068] [2021-11-21 01:14:10,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:14:10,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:14:10,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:14:10,879 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 01:14:10,879 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:14:10,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427280068] [2021-11-21 01:14:10,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427280068] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:14:10,881 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:14:10,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-21 01:14:10,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066014871] [2021-11-21 01:14:10,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:14:10,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:14:10,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:14:10,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:14:10,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:14:10,886 INFO L87 Difference]: Start difference. First operand 867 states and 1389 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 6 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-11-21 01:14:14,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:14:14,829 INFO L93 Difference]: Finished difference Result 3774 states and 6176 transitions. [2021-11-21 01:14:14,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-21 01:14:14,830 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 6 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 73 [2021-11-21 01:14:14,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:14:14,867 INFO L225 Difference]: With dead ends: 3774 [2021-11-21 01:14:14,867 INFO L226 Difference]: Without dead ends: 2924 [2021-11-21 01:14:14,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-21 01:14:14,882 INFO L933 BasicCegarLoop]: 983 mSDtfsCounter, 2588 mSDsluCounter, 1179 mSDsCounter, 0 mSdLazyCounter, 2413 mSolverCounterSat, 1192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2695 SdHoareTripleChecker+Valid, 2112 SdHoareTripleChecker+Invalid, 3605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1192 IncrementalHoareTripleChecker+Valid, 2413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:14:14,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2695 Valid, 2112 Invalid, 3605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1192 Valid, 2413 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-11-21 01:14:14,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2924 states. [2021-11-21 01:14:15,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2924 to 2652. [2021-11-21 01:14:15,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2652 states, 1862 states have (on average 1.5918367346938775) internal successors, (2964), 1975 states have internal predecessors, (2964), 645 states have call successors, (645), 128 states have call predecessors, (645), 144 states have return successors, (696), 619 states have call predecessors, (696), 640 states have call successors, (696) [2021-11-21 01:14:15,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2652 states to 2652 states and 4305 transitions. [2021-11-21 01:14:15,205 INFO L78 Accepts]: Start accepts. Automaton has 2652 states and 4305 transitions. Word has length 73 [2021-11-21 01:14:15,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:14:15,206 INFO L470 AbstractCegarLoop]: Abstraction has 2652 states and 4305 transitions. [2021-11-21 01:14:15,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 6 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-11-21 01:14:15,207 INFO L276 IsEmpty]: Start isEmpty. Operand 2652 states and 4305 transitions. [2021-11-21 01:14:15,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-21 01:14:15,209 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:14:15,209 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] [2021-11-21 01:14:15,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 01:14:15,210 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:14:15,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:14:15,210 INFO L85 PathProgramCache]: Analyzing trace with hash -2120546044, now seen corresponding path program 1 times [2021-11-21 01:14:15,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:14:15,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818083876] [2021-11-21 01:14:15,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:14:15,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:14:15,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:14:15,420 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 01:14:15,420 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:14:15,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818083876] [2021-11-21 01:14:15,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818083876] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:14:15,421 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:14:15,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-21 01:14:15,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705423697] [2021-11-21 01:14:15,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:14:15,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:14:15,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:14:15,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:14:15,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:14:15,425 INFO L87 Difference]: Start difference. First operand 2652 states and 4305 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-21 01:14:15,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:14:15,814 INFO L93 Difference]: Finished difference Result 4528 states and 7355 transitions. [2021-11-21 01:14:15,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:14:15,815 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) Word has length 72 [2021-11-21 01:14:15,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:14:15,843 INFO L225 Difference]: With dead ends: 4528 [2021-11-21 01:14:15,847 INFO L226 Difference]: Without dead ends: 2919 [2021-11-21 01:14:15,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:14:15,866 INFO L933 BasicCegarLoop]: 593 mSDtfsCounter, 42 mSDsluCounter, 3072 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 3484 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:14:15,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 3484 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:14:15,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2919 states. [2021-11-21 01:14:16,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2919 to 2725. [2021-11-21 01:14:16,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2725 states, 1913 states have (on average 1.5760585467851542) internal successors, (3015), 2028 states have internal predecessors, (3015), 645 states have call successors, (645), 128 states have call predecessors, (645), 166 states have return successors, (743), 639 states have call predecessors, (743), 640 states have call successors, (743) [2021-11-21 01:14:16,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2725 states to 2725 states and 4403 transitions. [2021-11-21 01:14:16,205 INFO L78 Accepts]: Start accepts. Automaton has 2725 states and 4403 transitions. Word has length 72 [2021-11-21 01:14:16,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:14:16,207 INFO L470 AbstractCegarLoop]: Abstraction has 2725 states and 4403 transitions. [2021-11-21 01:14:16,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-21 01:14:16,208 INFO L276 IsEmpty]: Start isEmpty. Operand 2725 states and 4403 transitions. [2021-11-21 01:14:16,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-21 01:14:16,211 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:14:16,211 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] [2021-11-21 01:14:16,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 01:14:16,211 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:14:16,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:14:16,212 INFO L85 PathProgramCache]: Analyzing trace with hash 460163070, now seen corresponding path program 1 times [2021-11-21 01:14:16,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:14:16,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457055575] [2021-11-21 01:14:16,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:14:16,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:14:16,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:14:16,370 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 01:14:16,370 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:14:16,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457055575] [2021-11-21 01:14:16,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457055575] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:14:16,371 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:14:16,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-21 01:14:16,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381157975] [2021-11-21 01:14:16,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:14:16,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:14:16,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:14:16,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:14:16,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:14:16,373 INFO L87 Difference]: Start difference. First operand 2725 states and 4403 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-21 01:14:16,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:14:16,803 INFO L93 Difference]: Finished difference Result 4626 states and 7478 transitions. [2021-11-21 01:14:16,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:14:16,804 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) Word has length 73 [2021-11-21 01:14:16,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:14:16,829 INFO L225 Difference]: With dead ends: 4626 [2021-11-21 01:14:16,830 INFO L226 Difference]: Without dead ends: 2970 [2021-11-21 01:14:16,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:14:16,842 INFO L933 BasicCegarLoop]: 597 mSDtfsCounter, 41 mSDsluCounter, 3087 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 3503 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:14:16,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 3503 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:14:16,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2970 states. [2021-11-21 01:14:17,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2970 to 2736. [2021-11-21 01:14:17,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2736 states, 1924 states have (on average 1.5727650727650728) internal successors, (3026), 2028 states have internal predecessors, (3026), 645 states have call successors, (645), 128 states have call predecessors, (645), 166 states have return successors, (743), 650 states have call predecessors, (743), 640 states have call successors, (743) [2021-11-21 01:14:17,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2736 states to 2736 states and 4414 transitions. [2021-11-21 01:14:17,080 INFO L78 Accepts]: Start accepts. Automaton has 2736 states and 4414 transitions. Word has length 73 [2021-11-21 01:14:17,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:14:17,081 INFO L470 AbstractCegarLoop]: Abstraction has 2736 states and 4414 transitions. [2021-11-21 01:14:17,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-21 01:14:17,082 INFO L276 IsEmpty]: Start isEmpty. Operand 2736 states and 4414 transitions. [2021-11-21 01:14:17,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-21 01:14:17,085 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:14:17,085 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] [2021-11-21 01:14:17,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 01:14:17,086 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:14:17,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:14:17,087 INFO L85 PathProgramCache]: Analyzing trace with hash -407194107, now seen corresponding path program 1 times [2021-11-21 01:14:17,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:14:17,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495750554] [2021-11-21 01:14:17,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:14:17,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:14:17,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:14:17,282 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 01:14:17,282 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:14:17,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495750554] [2021-11-21 01:14:17,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495750554] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:14:17,283 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:14:17,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-21 01:14:17,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963896255] [2021-11-21 01:14:17,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:14:17,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:14:17,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:14:17,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:14:17,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:14:17,285 INFO L87 Difference]: Start difference. First operand 2736 states and 4414 transitions. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 8 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2021-11-21 01:14:19,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:14:19,995 INFO L93 Difference]: Finished difference Result 6186 states and 10031 transitions. [2021-11-21 01:14:19,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 01:14:19,996 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 8 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) Word has length 79 [2021-11-21 01:14:19,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:14:20,031 INFO L225 Difference]: With dead ends: 6186 [2021-11-21 01:14:20,031 INFO L226 Difference]: Without dead ends: 4163 [2021-11-21 01:14:20,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-21 01:14:20,047 INFO L933 BasicCegarLoop]: 854 mSDtfsCounter, 1926 mSDsluCounter, 990 mSDsCounter, 0 mSdLazyCounter, 2372 mSolverCounterSat, 844 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2090 SdHoareTripleChecker+Valid, 1779 SdHoareTripleChecker+Invalid, 3216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 844 IncrementalHoareTripleChecker+Valid, 2372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:14:20,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2090 Valid, 1779 Invalid, 3216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [844 Valid, 2372 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-21 01:14:20,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4163 states. [2021-11-21 01:14:20,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4163 to 3987. [2021-11-21 01:14:20,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3987 states, 2754 states have (on average 1.532316630355846) internal successors, (4220), 2918 states have internal predecessors, (4220), 970 states have call successors, (970), 210 states have call predecessors, (970), 262 states have return successors, (1138), 964 states have call predecessors, (1138), 965 states have call successors, (1138) [2021-11-21 01:14:20,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3987 states to 3987 states and 6328 transitions. [2021-11-21 01:14:20,416 INFO L78 Accepts]: Start accepts. Automaton has 3987 states and 6328 transitions. Word has length 79 [2021-11-21 01:14:20,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:14:20,417 INFO L470 AbstractCegarLoop]: Abstraction has 3987 states and 6328 transitions. [2021-11-21 01:14:20,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 8 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2021-11-21 01:14:20,417 INFO L276 IsEmpty]: Start isEmpty. Operand 3987 states and 6328 transitions. [2021-11-21 01:14:20,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-21 01:14:20,426 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:14:20,426 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] [2021-11-21 01:14:20,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-21 01:14:20,426 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:14:20,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:14:20,427 INFO L85 PathProgramCache]: Analyzing trace with hash -403940076, now seen corresponding path program 1 times [2021-11-21 01:14:20,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:14:20,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684790451] [2021-11-21 01:14:20,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:14:20,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:14:20,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:14:20,576 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 01:14:20,576 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:14:20,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684790451] [2021-11-21 01:14:20,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684790451] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:14:20,577 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:14:20,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-21 01:14:20,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959260081] [2021-11-21 01:14:20,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:14:20,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:14:20,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:14:20,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:14:20,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:14:20,580 INFO L87 Difference]: Start difference. First operand 3987 states and 6328 transitions. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-21 01:14:22,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:14:22,725 INFO L93 Difference]: Finished difference Result 7540 states and 12021 transitions. [2021-11-21 01:14:22,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-21 01:14:22,727 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 82 [2021-11-21 01:14:22,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:14:22,761 INFO L225 Difference]: With dead ends: 7540 [2021-11-21 01:14:22,761 INFO L226 Difference]: Without dead ends: 4493 [2021-11-21 01:14:22,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-21 01:14:22,778 INFO L933 BasicCegarLoop]: 610 mSDtfsCounter, 974 mSDsluCounter, 1355 mSDsCounter, 0 mSdLazyCounter, 2192 mSolverCounterSat, 409 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1050 SdHoareTripleChecker+Valid, 1886 SdHoareTripleChecker+Invalid, 2601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 409 IncrementalHoareTripleChecker+Valid, 2192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:14:22,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1050 Valid, 1886 Invalid, 2601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [409 Valid, 2192 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-21 01:14:22,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4493 states. [2021-11-21 01:14:23,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4493 to 4068. [2021-11-21 01:14:23,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4068 states, 2808 states have (on average 1.5263532763532763) internal successors, (4286), 2984 states have internal predecessors, (4286), 973 states have call successors, (973), 225 states have call predecessors, (973), 286 states have return successors, (1172), 964 states have call predecessors, (1172), 968 states have call successors, (1172) [2021-11-21 01:14:23,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4068 states to 4068 states and 6431 transitions. [2021-11-21 01:14:23,104 INFO L78 Accepts]: Start accepts. Automaton has 4068 states and 6431 transitions. Word has length 82 [2021-11-21 01:14:23,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:14:23,104 INFO L470 AbstractCegarLoop]: Abstraction has 4068 states and 6431 transitions. [2021-11-21 01:14:23,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-21 01:14:23,105 INFO L276 IsEmpty]: Start isEmpty. Operand 4068 states and 6431 transitions. [2021-11-21 01:14:23,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-21 01:14:23,108 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:14:23,108 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] [2021-11-21 01:14:23,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-21 01:14:23,108 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:14:23,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:14:23,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1278460408, now seen corresponding path program 1 times [2021-11-21 01:14:23,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:14:23,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187656609] [2021-11-21 01:14:23,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:14:23,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:14:23,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:14:23,238 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-21 01:14:23,238 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:14:23,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187656609] [2021-11-21 01:14:23,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187656609] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:14:23,239 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:14:23,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:14:23,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175053660] [2021-11-21 01:14:23,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:14:23,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:14:23,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:14:23,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:14:23,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:14:23,241 INFO L87 Difference]: Start difference. First operand 4068 states and 6431 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-21 01:14:24,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:14:24,657 INFO L93 Difference]: Finished difference Result 11601 states and 18615 transitions. [2021-11-21 01:14:24,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:14:24,658 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 86 [2021-11-21 01:14:24,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:14:24,717 INFO L225 Difference]: With dead ends: 11601 [2021-11-21 01:14:24,718 INFO L226 Difference]: Without dead ends: 7550 [2021-11-21 01:14:24,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:14:24,741 INFO L933 BasicCegarLoop]: 558 mSDtfsCounter, 1154 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 381 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1225 SdHoareTripleChecker+Valid, 949 SdHoareTripleChecker+Invalid, 1080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 381 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:14:24,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1225 Valid, 949 Invalid, 1080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [381 Valid, 699 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-21 01:14:24,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7550 states. [2021-11-21 01:14:25,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7550 to 7004. [2021-11-21 01:14:25,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7004 states, 4874 states have (on average 1.5354944604021337) internal successors, (7484), 5186 states have internal predecessors, (7484), 1645 states have call successors, (1645), 363 states have call predecessors, (1645), 484 states have return successors, (2059), 1585 states have call predecessors, (2059), 1640 states have call successors, (2059) [2021-11-21 01:14:25,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7004 states to 7004 states and 11188 transitions. [2021-11-21 01:14:25,414 INFO L78 Accepts]: Start accepts. Automaton has 7004 states and 11188 transitions. Word has length 86 [2021-11-21 01:14:25,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:14:25,415 INFO L470 AbstractCegarLoop]: Abstraction has 7004 states and 11188 transitions. [2021-11-21 01:14:25,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-21 01:14:25,416 INFO L276 IsEmpty]: Start isEmpty. Operand 7004 states and 11188 transitions. [2021-11-21 01:14:25,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-21 01:14:25,420 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:14:25,420 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] [2021-11-21 01:14:25,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-21 01:14:25,420 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:14:25,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:14:25,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1175558529, now seen corresponding path program 1 times [2021-11-21 01:14:25,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:14:25,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254744608] [2021-11-21 01:14:25,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:14:25,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:14:25,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:14:25,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-21 01:14:25,525 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:14:25,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254744608] [2021-11-21 01:14:25,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254744608] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:14:25,525 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:14:25,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:14:25,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57889892] [2021-11-21 01:14:25,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:14:25,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:14:25,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:14:25,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:14:25,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:14:25,528 INFO L87 Difference]: Start difference. First operand 7004 states and 11188 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-21 01:14:27,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:14:27,289 INFO L93 Difference]: Finished difference Result 19992 states and 32462 transitions. [2021-11-21 01:14:27,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:14:27,290 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 86 [2021-11-21 01:14:27,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:14:27,391 INFO L225 Difference]: With dead ends: 19992 [2021-11-21 01:14:27,391 INFO L226 Difference]: Without dead ends: 13006 [2021-11-21 01:14:27,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:14:27,442 INFO L933 BasicCegarLoop]: 580 mSDtfsCounter, 1132 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 379 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1202 SdHoareTripleChecker+Valid, 968 SdHoareTripleChecker+Invalid, 1076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 379 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:14:27,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1202 Valid, 968 Invalid, 1076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [379 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-21 01:14:27,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13006 states. [2021-11-21 01:14:28,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13006 to 12361. [2021-11-21 01:14:28,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12361 states, 8642 states have (on average 1.539342744735015) internal successors, (13303), 9254 states have internal predecessors, (13303), 2823 states have call successors, (2823), 639 states have call predecessors, (2823), 895 states have return successors, (3794), 2667 states have call predecessors, (3794), 2818 states have call successors, (3794) [2021-11-21 01:14:28,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12361 states to 12361 states and 19920 transitions. [2021-11-21 01:14:28,549 INFO L78 Accepts]: Start accepts. Automaton has 12361 states and 19920 transitions. Word has length 86 [2021-11-21 01:14:28,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:14:28,550 INFO L470 AbstractCegarLoop]: Abstraction has 12361 states and 19920 transitions. [2021-11-21 01:14:28,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-21 01:14:28,550 INFO L276 IsEmpty]: Start isEmpty. Operand 12361 states and 19920 transitions. [2021-11-21 01:14:28,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-21 01:14:28,554 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:14:28,554 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] [2021-11-21 01:14:28,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-21 01:14:28,555 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:14:28,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:14:28,556 INFO L85 PathProgramCache]: Analyzing trace with hash 2082443398, now seen corresponding path program 1 times [2021-11-21 01:14:28,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:14:28,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698583970] [2021-11-21 01:14:28,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:14:28,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:14:28,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:14:28,711 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-21 01:14:28,712 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:14:28,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698583970] [2021-11-21 01:14:28,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698583970] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:14:28,712 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:14:28,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:14:28,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130382120] [2021-11-21 01:14:28,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:14:28,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:14:28,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:14:28,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:14:28,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:14:28,714 INFO L87 Difference]: Start difference. First operand 12361 states and 19920 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-21 01:14:31,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:14:31,197 INFO L93 Difference]: Finished difference Result 36173 states and 59825 transitions. [2021-11-21 01:14:31,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:14:31,198 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 87 [2021-11-21 01:14:31,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:14:31,354 INFO L225 Difference]: With dead ends: 36173 [2021-11-21 01:14:31,354 INFO L226 Difference]: Without dead ends: 23832 [2021-11-21 01:14:31,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:14:31,415 INFO L933 BasicCegarLoop]: 592 mSDtfsCounter, 1119 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 378 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1188 SdHoareTripleChecker+Valid, 977 SdHoareTripleChecker+Invalid, 1073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 378 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:14:31,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1188 Valid, 977 Invalid, 1073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [378 Valid, 695 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-21 01:14:31,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23832 states. [2021-11-21 01:14:32,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23832 to 22941. [2021-11-21 01:14:33,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22941 states, 16065 states have (on average 1.538375350140056) internal successors, (24714), 17297 states have internal predecessors, (24714), 5136 states have call successors, (5136), 1191 states have call predecessors, (5136), 1739 states have return successors, (7631), 4788 states have call predecessors, (7631), 5131 states have call successors, (7631) [2021-11-21 01:14:33,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22941 states to 22941 states and 37481 transitions. [2021-11-21 01:14:33,151 INFO L78 Accepts]: Start accepts. Automaton has 22941 states and 37481 transitions. Word has length 87 [2021-11-21 01:14:33,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:14:33,151 INFO L470 AbstractCegarLoop]: Abstraction has 22941 states and 37481 transitions. [2021-11-21 01:14:33,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-21 01:14:33,152 INFO L276 IsEmpty]: Start isEmpty. Operand 22941 states and 37481 transitions. [2021-11-21 01:14:33,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-21 01:14:33,155 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:14:33,156 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] [2021-11-21 01:14:33,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-21 01:14:33,156 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:14:33,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:14:33,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1020511871, now seen corresponding path program 1 times [2021-11-21 01:14:33,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:14:33,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688991540] [2021-11-21 01:14:33,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:14:33,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:14:33,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:14:33,272 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-21 01:14:33,272 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:14:33,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688991540] [2021-11-21 01:14:33,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688991540] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:14:33,273 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:14:33,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:14:33,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90559535] [2021-11-21 01:14:33,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:14:33,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:14:33,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:14:33,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:14:33,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:14:33,275 INFO L87 Difference]: Start difference. First operand 22941 states and 37481 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-21 01:14:37,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:14:37,402 INFO L93 Difference]: Finished difference Result 68167 states and 116281 transitions. [2021-11-21 01:14:37,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:14:37,403 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 89 [2021-11-21 01:14:37,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:14:37,708 INFO L225 Difference]: With dead ends: 68167 [2021-11-21 01:14:37,708 INFO L226 Difference]: Without dead ends: 45250 [2021-11-21 01:14:37,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:14:37,817 INFO L933 BasicCegarLoop]: 604 mSDtfsCounter, 1106 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 692 mSolverCounterSat, 377 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1174 SdHoareTripleChecker+Valid, 989 SdHoareTripleChecker+Invalid, 1069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 377 IncrementalHoareTripleChecker+Valid, 692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:14:37,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1174 Valid, 989 Invalid, 1069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [377 Valid, 692 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-21 01:14:37,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45250 states. [2021-11-21 01:14:41,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45250 to 43813. [2021-11-21 01:14:41,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43813 states, 30668 states have (on average 1.5341398200078258) internal successors, (47049), 33192 states have internal predecessors, (47049), 9665 states have call successors, (9665), 2295 states have call predecessors, (9665), 3479 states have return successors, (16600), 8933 states have call predecessors, (16600), 9660 states have call successors, (16600) [2021-11-21 01:14:41,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43813 states to 43813 states and 73314 transitions. [2021-11-21 01:14:41,559 INFO L78 Accepts]: Start accepts. Automaton has 43813 states and 73314 transitions. Word has length 89 [2021-11-21 01:14:41,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:14:41,559 INFO L470 AbstractCegarLoop]: Abstraction has 43813 states and 73314 transitions. [2021-11-21 01:14:41,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-21 01:14:41,560 INFO L276 IsEmpty]: Start isEmpty. Operand 43813 states and 73314 transitions. [2021-11-21 01:14:41,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-21 01:14:41,564 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:14:41,564 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] [2021-11-21 01:14:41,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-21 01:14:41,565 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:14:41,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:14:41,565 INFO L85 PathProgramCache]: Analyzing trace with hash -230769816, now seen corresponding path program 1 times [2021-11-21 01:14:41,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:14:41,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989609024] [2021-11-21 01:14:41,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:14:41,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:14:41,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:14:41,683 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-21 01:14:41,683 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:14:41,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989609024] [2021-11-21 01:14:41,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989609024] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:14:41,684 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:14:41,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:14:41,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961051841] [2021-11-21 01:14:41,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:14:41,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:14:41,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:14:41,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:14:41,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:14:41,686 INFO L87 Difference]: Start difference. First operand 43813 states and 73314 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-21 01:14:48,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:14:48,197 INFO L93 Difference]: Finished difference Result 131595 states and 236728 transitions. [2021-11-21 01:14:48,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:14:48,198 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 89 [2021-11-21 01:14:48,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:14:49,058 INFO L225 Difference]: With dead ends: 131595 [2021-11-21 01:14:49,058 INFO L226 Difference]: Without dead ends: 87804 [2021-11-21 01:14:49,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:14:49,269 INFO L933 BasicCegarLoop]: 615 mSDtfsCounter, 1097 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 374 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1164 SdHoareTripleChecker+Valid, 1004 SdHoareTripleChecker+Invalid, 1063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 374 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:14:49,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1164 Valid, 1004 Invalid, 1063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [374 Valid, 689 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-21 01:14:49,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87804 states. [2021-11-21 01:14:55,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87804 to 84841. [2021-11-21 01:14:56,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84841 states, 59468 states have (on average 1.5318490616802314) internal successors, (91096), 64475 states have internal predecessors, (91096), 18523 states have call successors, (18523), 4495 states have call predecessors, (18523), 6849 states have return successors, (37286), 17022 states have call predecessors, (37286), 18518 states have call successors, (37286) [2021-11-21 01:14:57,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84841 states to 84841 states and 146905 transitions. [2021-11-21 01:14:57,072 INFO L78 Accepts]: Start accepts. Automaton has 84841 states and 146905 transitions. Word has length 89 [2021-11-21 01:14:57,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:14:57,073 INFO L470 AbstractCegarLoop]: Abstraction has 84841 states and 146905 transitions. [2021-11-21 01:14:57,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-21 01:14:57,074 INFO L276 IsEmpty]: Start isEmpty. Operand 84841 states and 146905 transitions. [2021-11-21 01:14:57,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-21 01:14:57,083 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:14:57,084 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 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] [2021-11-21 01:14:57,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-21 01:14:57,084 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:14:57,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:14:57,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1913624543, now seen corresponding path program 1 times [2021-11-21 01:14:57,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:14:57,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409643145] [2021-11-21 01:14:57,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:14:57,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:14:57,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:14:57,215 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-21 01:14:57,216 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:14:57,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409643145] [2021-11-21 01:14:57,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409643145] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:14:57,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342050108] [2021-11-21 01:14:57,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:14:57,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:14:57,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a00f06b-cda1-4395-886c-8a43f331928f/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:14:57,220 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a00f06b-cda1-4395-886c-8a43f331928f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:14:57,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a00f06b-cda1-4395-886c-8a43f331928f/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:14:57,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:14:57,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 1783 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:14:57,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:14:58,011 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-21 01:14:58,012 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:14:58,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342050108] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:14:58,012 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:14:58,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-11-21 01:14:58,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110753478] [2021-11-21 01:14:58,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:14:58,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:14:58,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:14:58,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:14:58,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-21 01:14:58,015 INFO L87 Difference]: Start difference. First operand 84841 states and 146905 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-21 01:15:04,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:15:04,590 INFO L93 Difference]: Finished difference Result 177270 states and 317720 transitions. [2021-11-21 01:15:04,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:15:04,590 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 127 [2021-11-21 01:15:04,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:15:05,115 INFO L225 Difference]: With dead ends: 177270 [2021-11-21 01:15:05,116 INFO L226 Difference]: Without dead ends: 92446 [2021-11-21 01:15:05,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-21 01:15:05,457 INFO L933 BasicCegarLoop]: 481 mSDtfsCounter, 213 mSDsluCounter, 1008 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1419 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:15:05,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 1419 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:15:05,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92446 states.