./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec9_product31.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e46aaf0-704b-493c-bb1a-367d2d73ceb7/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e46aaf0-704b-493c-bb1a-367d2d73ceb7/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e46aaf0-704b-493c-bb1a-367d2d73ceb7/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e46aaf0-704b-493c-bb1a-367d2d73ceb7/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product31.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e46aaf0-704b-493c-bb1a-367d2d73ceb7/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e46aaf0-704b-493c-bb1a-367d2d73ceb7/bin/utaipan-Q6hlc19bkW --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 21dc9f7e2ddd4ffb05ac36477bf46e7266bc68ad137742c8de338dbab6571869 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 14:49:47,675 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:49:47,679 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:49:47,728 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:49:47,729 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:49:47,730 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:49:47,732 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:49:47,734 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:49:47,736 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:49:47,737 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:49:47,743 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:49:47,747 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:49:47,748 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:49:47,755 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:49:47,759 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:49:47,761 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:49:47,764 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:49:47,767 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:49:47,768 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:49:47,777 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:49:47,778 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:49:47,781 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:49:47,784 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:49:47,785 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:49:47,796 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:49:47,796 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:49:47,797 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:49:47,798 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:49:47,799 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:49:47,800 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:49:47,800 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:49:47,801 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:49:47,802 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:49:47,803 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:49:47,804 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:49:47,805 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:49:47,806 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:49:47,806 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:49:47,811 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:49:47,812 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:49:47,813 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:49:47,814 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e46aaf0-704b-493c-bb1a-367d2d73ceb7/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 14:49:47,852 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:49:47,853 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:49:47,854 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:49:47,854 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:49:47,855 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:49:47,855 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:49:47,856 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:49:47,856 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:49:47,856 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:49:47,857 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 14:49:47,858 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:49:47,858 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:49:47,859 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 14:49:47,859 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 14:49:47,859 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:49:47,860 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 14:49:47,860 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 14:49:47,860 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 14:49:47,862 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:49:47,862 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 14:49:47,862 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:49:47,863 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 14:49:47,863 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:49:47,863 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 14:49:47,863 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:49:47,864 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 14:49:47,864 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 14:49:47,865 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 14:49:47,865 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:49:47,865 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 14:49:47,866 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:49:47,866 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:49:47,866 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:49:47,867 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:49:47,867 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 14:49:47,867 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:49:47,867 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 14:49:47,867 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 14:49:47,868 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 14:49:47,868 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 14:49:47,868 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:49:47,868 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_8e46aaf0-704b-493c-bb1a-367d2d73ceb7/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e46aaf0-704b-493c-bb1a-367d2d73ceb7/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 21dc9f7e2ddd4ffb05ac36477bf46e7266bc68ad137742c8de338dbab6571869 [2022-11-23 14:49:48,187 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:49:48,232 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:49:48,236 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:49:48,237 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:49:48,238 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:49:48,240 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e46aaf0-704b-493c-bb1a-367d2d73ceb7/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/product-lines/elevator_spec9_product31.cil.c [2022-11-23 14:49:52,000 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:49:52,463 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:49:52,464 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e46aaf0-704b-493c-bb1a-367d2d73ceb7/sv-benchmarks/c/product-lines/elevator_spec9_product31.cil.c [2022-11-23 14:49:52,492 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e46aaf0-704b-493c-bb1a-367d2d73ceb7/bin/utaipan-Q6hlc19bkW/data/8c157412f/64c8f27c261e4741b4036984cd46c21a/FLAG16e1a540e [2022-11-23 14:49:52,510 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e46aaf0-704b-493c-bb1a-367d2d73ceb7/bin/utaipan-Q6hlc19bkW/data/8c157412f/64c8f27c261e4741b4036984cd46c21a [2022-11-23 14:49:52,513 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:49:52,515 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:49:52,516 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:49:52,517 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:49:52,521 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:49:52,522 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:49:52" (1/1) ... [2022-11-23 14:49:52,523 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@324ecbcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:49:52, skipping insertion in model container [2022-11-23 14:49:52,524 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:49:52" (1/1) ... [2022-11-23 14:49:52,533 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:49:52,602 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:49:52,900 WARN L237 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_8e46aaf0-704b-493c-bb1a-367d2d73ceb7/sv-benchmarks/c/product-lines/elevator_spec9_product31.cil.c[5910,5923] [2022-11-23 14:49:53,307 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:49:53,321 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:49:53,351 WARN L237 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_8e46aaf0-704b-493c-bb1a-367d2d73ceb7/sv-benchmarks/c/product-lines/elevator_spec9_product31.cil.c[5910,5923] [2022-11-23 14:49:53,548 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:49:53,617 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:49:53,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:49:53 WrapperNode [2022-11-23 14:49:53,618 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:49:53,620 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:49:53,620 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:49:53,621 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:49:53,630 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:49:53" (1/1) ... [2022-11-23 14:49:53,691 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:49:53" (1/1) ... [2022-11-23 14:49:53,774 INFO L138 Inliner]: procedures = 97, calls = 346, calls flagged for inlining = 28, calls inlined = 25, statements flattened = 925 [2022-11-23 14:49:53,775 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:49:53,776 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:49:53,776 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:49:53,776 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:49:53,803 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:49:53" (1/1) ... [2022-11-23 14:49:53,803 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:49:53" (1/1) ... [2022-11-23 14:49:53,809 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:49:53" (1/1) ... [2022-11-23 14:49:53,818 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:49:53" (1/1) ... [2022-11-23 14:49:53,856 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:49:53" (1/1) ... [2022-11-23 14:49:53,873 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:49:53" (1/1) ... [2022-11-23 14:49:53,878 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:49:53" (1/1) ... [2022-11-23 14:49:53,884 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:49:53" (1/1) ... [2022-11-23 14:49:53,892 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:49:53,893 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:49:53,893 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:49:53,894 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:49:53,895 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:49:53" (1/1) ... [2022-11-23 14:49:53,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:49:53,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e46aaf0-704b-493c-bb1a-367d2d73ceb7/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:49:53,937 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e46aaf0-704b-493c-bb1a-367d2d73ceb7/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:49:54,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e46aaf0-704b-493c-bb1a-367d2d73ceb7/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:49:54,041 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-23 14:49:54,041 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-23 14:49:54,041 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-23 14:49:54,042 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-23 14:49:54,042 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-23 14:49:54,042 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-23 14:49:54,042 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2022-11-23 14:49:54,042 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2022-11-23 14:49:54,042 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-23 14:49:54,043 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-23 14:49:54,043 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-23 14:49:54,043 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-23 14:49:54,043 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-23 14:49:54,043 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-23 14:49:54,043 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-23 14:49:54,044 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-23 14:49:54,044 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-23 14:49:54,044 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-23 14:49:54,044 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-23 14:49:54,044 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-23 14:49:54,044 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-23 14:49:54,045 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-23 14:49:54,045 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 14:49:54,046 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-11-23 14:49:54,046 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-11-23 14:49:54,047 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-23 14:49:54,047 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-23 14:49:54,047 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-11-23 14:49:54,048 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-11-23 14:49:54,048 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-23 14:49:54,050 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-23 14:49:54,050 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-23 14:49:54,050 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-23 14:49:54,050 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-23 14:49:54,051 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-23 14:49:54,051 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-23 14:49:54,051 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-23 14:49:54,051 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-23 14:49:54,051 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-23 14:49:54,052 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-23 14:49:54,052 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-23 14:49:54,052 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-23 14:49:54,052 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-23 14:49:54,052 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-23 14:49:54,053 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-23 14:49:54,053 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-23 14:49:54,054 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-23 14:49:54,054 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2022-11-23 14:49:54,054 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2022-11-23 14:49:54,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 14:49:54,055 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-23 14:49:54,056 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-23 14:49:54,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:49:54,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:49:54,057 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-23 14:49:54,057 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-23 14:49:54,325 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:49:54,341 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:49:56,032 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:49:57,087 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:49:57,088 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-23 14:49:57,094 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:49:57 BoogieIcfgContainer [2022-11-23 14:49:57,094 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:49:57,098 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:49:57,098 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:49:57,102 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:49:57,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:49:52" (1/3) ... [2022-11-23 14:49:57,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b158956 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:49:57, skipping insertion in model container [2022-11-23 14:49:57,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:49:53" (2/3) ... [2022-11-23 14:49:57,107 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b158956 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:49:57, skipping insertion in model container [2022-11-23 14:49:57,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:49:57" (3/3) ... [2022-11-23 14:49:57,108 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product31.cil.c [2022-11-23 14:49:57,133 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:49:57,134 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 14:49:57,232 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:49:57,242 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@786d1ca8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:49:57,243 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 14:49:57,254 INFO L276 IsEmpty]: Start isEmpty. Operand has 388 states, 261 states have (on average 1.5747126436781609) internal successors, (411), 282 states have internal predecessors, (411), 99 states have call successors, (99), 26 states have call predecessors, (99), 26 states have return successors, (99), 93 states have call predecessors, (99), 99 states have call successors, (99) [2022-11-23 14:49:57,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-23 14:49:57,297 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:49:57,298 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:49:57,299 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:49:57,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:49:57,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1560275502, now seen corresponding path program 1 times [2022-11-23 14:49:57,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:49:57,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681710152] [2022-11-23 14:49:57,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:49:57,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:49:57,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:49:58,002 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 14:49:58,003 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:49:58,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681710152] [2022-11-23 14:49:58,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681710152] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:49:58,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:49:58,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:49:58,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337409780] [2022-11-23 14:49:58,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:49:58,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-23 14:49:58,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:49:58,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-23 14:49:58,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 14:49:58,063 INFO L87 Difference]: Start difference. First operand has 388 states, 261 states have (on average 1.5747126436781609) internal successors, (411), 282 states have internal predecessors, (411), 99 states have call successors, (99), 26 states have call predecessors, (99), 26 states have return successors, (99), 93 states have call predecessors, (99), 99 states have call successors, (99) Second operand has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2022-11-23 14:49:58,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:49:58,332 INFO L93 Difference]: Finished difference Result 406 states and 636 transitions. [2022-11-23 14:49:58,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-23 14:49:58,335 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) Word has length 77 [2022-11-23 14:49:58,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:49:58,364 INFO L225 Difference]: With dead ends: 406 [2022-11-23 14:49:58,364 INFO L226 Difference]: Without dead ends: 384 [2022-11-23 14:49:58,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 14:49:58,372 INFO L413 NwaCegarLoop]: 562 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:49:58,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 562 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:49:58,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-11-23 14:49:58,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 384. [2022-11-23 14:49:58,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 259 states have (on average 1.5637065637065637) internal successors, (405), 278 states have internal predecessors, (405), 99 states have call successors, (99), 26 states have call predecessors, (99), 25 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2022-11-23 14:49:58,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 598 transitions. [2022-11-23 14:49:58,474 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 598 transitions. Word has length 77 [2022-11-23 14:49:58,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:49:58,476 INFO L495 AbstractCegarLoop]: Abstraction has 384 states and 598 transitions. [2022-11-23 14:49:58,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2022-11-23 14:49:58,476 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 598 transitions. [2022-11-23 14:49:58,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-23 14:49:58,487 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:49:58,488 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:49:58,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 14:49:58,489 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:49:58,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:49:58,490 INFO L85 PathProgramCache]: Analyzing trace with hash -538972801, now seen corresponding path program 1 times [2022-11-23 14:49:58,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:49:58,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414836146] [2022-11-23 14:49:58,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:49:58,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:49:58,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:49:59,139 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 14:49:59,139 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:49:59,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414836146] [2022-11-23 14:49:59,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414836146] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:49:59,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:49:59,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-23 14:49:59,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238805483] [2022-11-23 14:49:59,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:49:59,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 14:49:59,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:49:59,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 14:49:59,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:49:59,146 INFO L87 Difference]: Start difference. First operand 384 states and 598 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 5 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-23 14:50:02,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:50:02,510 INFO L93 Difference]: Finished difference Result 1161 states and 1835 transitions. [2022-11-23 14:50:02,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 14:50:02,512 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 5 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 78 [2022-11-23 14:50:02,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:50:02,527 INFO L225 Difference]: With dead ends: 1161 [2022-11-23 14:50:02,527 INFO L226 Difference]: Without dead ends: 793 [2022-11-23 14:50:02,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-23 14:50:02,546 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 1173 mSDsluCounter, 1048 mSDsCounter, 0 mSdLazyCounter, 2602 mSolverCounterSat, 436 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1248 SdHoareTripleChecker+Valid, 1370 SdHoareTripleChecker+Invalid, 3038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 436 IncrementalHoareTripleChecker+Valid, 2602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:50:02,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1248 Valid, 1370 Invalid, 3038 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [436 Valid, 2602 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-11-23 14:50:02,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2022-11-23 14:50:02,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 755. [2022-11-23 14:50:02,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 518 states have (on average 1.5752895752895753) internal successors, (816), 551 states have internal predecessors, (816), 188 states have call successors, (188), 48 states have call predecessors, (188), 48 states have return successors, (189), 180 states have call predecessors, (189), 183 states have call successors, (189) [2022-11-23 14:50:02,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 1193 transitions. [2022-11-23 14:50:02,666 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 1193 transitions. Word has length 78 [2022-11-23 14:50:02,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:50:02,666 INFO L495 AbstractCegarLoop]: Abstraction has 755 states and 1193 transitions. [2022-11-23 14:50:02,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 5 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-23 14:50:02,667 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 1193 transitions. [2022-11-23 14:50:02,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-23 14:50:02,672 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:50:02,672 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:50:02,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 14:50:02,673 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:50:02,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:50:02,674 INFO L85 PathProgramCache]: Analyzing trace with hash -173815726, now seen corresponding path program 1 times [2022-11-23 14:50:02,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:50:02,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186263932] [2022-11-23 14:50:02,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:50:02,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:50:02,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:50:03,099 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 14:50:03,100 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:50:03,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186263932] [2022-11-23 14:50:03,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186263932] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:50:03,104 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:50:03,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 14:50:03,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795085936] [2022-11-23 14:50:03,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:50:03,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 14:50:03,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:50:03,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 14:50:03,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:50:03,108 INFO L87 Difference]: Start difference. First operand 755 states and 1193 transitions. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-23 14:50:03,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:50:03,992 INFO L93 Difference]: Finished difference Result 826 states and 1305 transitions. [2022-11-23 14:50:03,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:50:03,993 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 82 [2022-11-23 14:50:03,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:50:04,003 INFO L225 Difference]: With dead ends: 826 [2022-11-23 14:50:04,004 INFO L226 Difference]: Without dead ends: 811 [2022-11-23 14:50:04,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:50:04,016 INFO L413 NwaCegarLoop]: 558 mSDtfsCounter, 663 mSDsluCounter, 1282 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 664 SdHoareTripleChecker+Valid, 1840 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 14:50:04,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [664 Valid, 1840 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 14:50:04,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2022-11-23 14:50:04,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 759. [2022-11-23 14:50:04,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 522 states have (on average 1.5708812260536398) internal successors, (820), 555 states have internal predecessors, (820), 188 states have call successors, (188), 48 states have call predecessors, (188), 48 states have return successors, (189), 180 states have call predecessors, (189), 183 states have call successors, (189) [2022-11-23 14:50:04,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 1197 transitions. [2022-11-23 14:50:04,102 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 1197 transitions. Word has length 82 [2022-11-23 14:50:04,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:50:04,103 INFO L495 AbstractCegarLoop]: Abstraction has 759 states and 1197 transitions. [2022-11-23 14:50:04,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-23 14:50:04,104 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 1197 transitions. [2022-11-23 14:50:04,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-23 14:50:04,108 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:50:04,108 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:50:04,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 14:50:04,109 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:50:04,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:50:04,109 INFO L85 PathProgramCache]: Analyzing trace with hash 887501073, now seen corresponding path program 1 times [2022-11-23 14:50:04,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:50:04,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469193539] [2022-11-23 14:50:04,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:50:04,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:50:04,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:50:04,361 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 14:50:04,362 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:50:04,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469193539] [2022-11-23 14:50:04,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469193539] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:50:04,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:50:04,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:50:04,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917658533] [2022-11-23 14:50:04,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:50:04,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:50:04,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:50:04,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:50:04,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:50:04,365 INFO L87 Difference]: Start difference. First operand 759 states and 1197 transitions. Second operand has 5 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 1 states have call successors, (16) [2022-11-23 14:50:04,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:50:04,675 INFO L93 Difference]: Finished difference Result 778 states and 1221 transitions. [2022-11-23 14:50:04,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:50:04,682 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 1 states have call successors, (16) Word has length 87 [2022-11-23 14:50:04,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:50:04,691 INFO L225 Difference]: With dead ends: 778 [2022-11-23 14:50:04,691 INFO L226 Difference]: Without dead ends: 763 [2022-11-23 14:50:04,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:50:04,701 INFO L413 NwaCegarLoop]: 561 mSDtfsCounter, 30 mSDsluCounter, 1645 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 2206 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:50:04,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 2206 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:50:04,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2022-11-23 14:50:04,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 759. [2022-11-23 14:50:04,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 522 states have (on average 1.5670498084291187) internal successors, (818), 555 states have internal predecessors, (818), 188 states have call successors, (188), 48 states have call predecessors, (188), 48 states have return successors, (189), 180 states have call predecessors, (189), 183 states have call successors, (189) [2022-11-23 14:50:04,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 1195 transitions. [2022-11-23 14:50:04,792 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 1195 transitions. Word has length 87 [2022-11-23 14:50:04,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:50:04,793 INFO L495 AbstractCegarLoop]: Abstraction has 759 states and 1195 transitions. [2022-11-23 14:50:04,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 1 states have call successors, (16) [2022-11-23 14:50:04,794 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 1195 transitions. [2022-11-23 14:50:04,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-23 14:50:04,798 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:50:04,798 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:50:04,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 14:50:04,799 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:50:04,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:50:04,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1698869369, now seen corresponding path program 1 times [2022-11-23 14:50:04,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:50:04,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272425598] [2022-11-23 14:50:04,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:50:04,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:50:04,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:50:05,034 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 14:50:05,035 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:50:05,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272425598] [2022-11-23 14:50:05,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272425598] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:50:05,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:50:05,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:50:05,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556163536] [2022-11-23 14:50:05,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:50:05,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:50:05,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:50:05,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:50:05,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:50:05,039 INFO L87 Difference]: Start difference. First operand 759 states and 1195 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-23 14:50:05,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:50:05,342 INFO L93 Difference]: Finished difference Result 2211 states and 3515 transitions. [2022-11-23 14:50:05,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:50:05,343 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 94 [2022-11-23 14:50:05,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:50:05,356 INFO L225 Difference]: With dead ends: 2211 [2022-11-23 14:50:05,357 INFO L226 Difference]: Without dead ends: 1468 [2022-11-23 14:50:05,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:50:05,363 INFO L413 NwaCegarLoop]: 680 mSDtfsCounter, 553 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 1218 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:50:05,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [553 Valid, 1218 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:50:05,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1468 states. [2022-11-23 14:50:05,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1468 to 1440. [2022-11-23 14:50:05,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1440 states, 1010 states have (on average 1.5792079207920793) internal successors, (1595), 1072 states have internal predecessors, (1595), 340 states have call successors, (340), 87 states have call predecessors, (340), 89 states have return successors, (354), 318 states have call predecessors, (354), 335 states have call successors, (354) [2022-11-23 14:50:05,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1440 states to 1440 states and 2289 transitions. [2022-11-23 14:50:05,502 INFO L78 Accepts]: Start accepts. Automaton has 1440 states and 2289 transitions. Word has length 94 [2022-11-23 14:50:05,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:50:05,503 INFO L495 AbstractCegarLoop]: Abstraction has 1440 states and 2289 transitions. [2022-11-23 14:50:05,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-23 14:50:05,504 INFO L276 IsEmpty]: Start isEmpty. Operand 1440 states and 2289 transitions. [2022-11-23 14:50:05,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-23 14:50:05,513 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:50:05,513 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:50:05,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 14:50:05,514 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:50:05,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:50:05,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1125484940, now seen corresponding path program 1 times [2022-11-23 14:50:05,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:50:05,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461720572] [2022-11-23 14:50:05,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:50:05,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:50:05,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:50:05,659 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 14:50:05,660 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:50:05,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461720572] [2022-11-23 14:50:05,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461720572] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:50:05,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:50:05,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:50:05,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326585024] [2022-11-23 14:50:05,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:50:05,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:50:05,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:50:05,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:50:05,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:50:05,663 INFO L87 Difference]: Start difference. First operand 1440 states and 2289 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-23 14:50:06,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:50:06,016 INFO L93 Difference]: Finished difference Result 4253 states and 6820 transitions. [2022-11-23 14:50:06,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:50:06,017 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 95 [2022-11-23 14:50:06,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:50:06,044 INFO L225 Difference]: With dead ends: 4253 [2022-11-23 14:50:06,044 INFO L226 Difference]: Without dead ends: 2832 [2022-11-23 14:50:06,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:50:06,055 INFO L413 NwaCegarLoop]: 683 mSDtfsCounter, 552 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 552 SdHoareTripleChecker+Valid, 1224 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:50:06,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [552 Valid, 1224 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:50:06,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2832 states. [2022-11-23 14:50:06,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2832 to 2803. [2022-11-23 14:50:06,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2803 states, 1987 states have (on average 1.584297936587821) internal successors, (3148), 2107 states have internal predecessors, (3148), 644 states have call successors, (644), 165 states have call predecessors, (644), 171 states have return successors, (700), 594 states have call predecessors, (700), 639 states have call successors, (700) [2022-11-23 14:50:06,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2803 states to 2803 states and 4492 transitions. [2022-11-23 14:50:06,408 INFO L78 Accepts]: Start accepts. Automaton has 2803 states and 4492 transitions. Word has length 95 [2022-11-23 14:50:06,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:50:06,409 INFO L495 AbstractCegarLoop]: Abstraction has 2803 states and 4492 transitions. [2022-11-23 14:50:06,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-23 14:50:06,410 INFO L276 IsEmpty]: Start isEmpty. Operand 2803 states and 4492 transitions. [2022-11-23 14:50:06,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-23 14:50:06,413 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:50:06,414 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:50:06,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 14:50:06,414 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:50:06,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:50:06,415 INFO L85 PathProgramCache]: Analyzing trace with hash -530432919, now seen corresponding path program 1 times [2022-11-23 14:50:06,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:50:06,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541497503] [2022-11-23 14:50:06,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:50:06,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:50:06,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:50:06,554 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 14:50:06,555 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:50:06,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541497503] [2022-11-23 14:50:06,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541497503] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:50:06,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:50:06,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:50:06,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637391756] [2022-11-23 14:50:06,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:50:06,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:50:06,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:50:06,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:50:06,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:50:06,562 INFO L87 Difference]: Start difference. First operand 2803 states and 4492 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-23 14:50:07,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:50:07,126 INFO L93 Difference]: Finished difference Result 8338 states and 13508 transitions. [2022-11-23 14:50:07,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:50:07,126 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 96 [2022-11-23 14:50:07,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:50:07,176 INFO L225 Difference]: With dead ends: 8338 [2022-11-23 14:50:07,177 INFO L226 Difference]: Without dead ends: 5560 [2022-11-23 14:50:07,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:50:07,199 INFO L413 NwaCegarLoop]: 686 mSDtfsCounter, 551 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 551 SdHoareTripleChecker+Valid, 1230 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:50:07,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [551 Valid, 1230 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:50:07,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5560 states. [2022-11-23 14:50:07,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5560 to 5530. [2022-11-23 14:50:07,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5530 states, 3942 states have (on average 1.5854895991882294) internal successors, (6250), 4178 states have internal predecessors, (6250), 1252 states have call successors, (1252), 321 states have call predecessors, (1252), 335 states have return successors, (1452), 1146 states have call predecessors, (1452), 1247 states have call successors, (1452) [2022-11-23 14:50:07,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5530 states to 5530 states and 8954 transitions. [2022-11-23 14:50:07,710 INFO L78 Accepts]: Start accepts. Automaton has 5530 states and 8954 transitions. Word has length 96 [2022-11-23 14:50:07,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:50:07,711 INFO L495 AbstractCegarLoop]: Abstraction has 5530 states and 8954 transitions. [2022-11-23 14:50:07,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-23 14:50:07,711 INFO L276 IsEmpty]: Start isEmpty. Operand 5530 states and 8954 transitions. [2022-11-23 14:50:07,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-23 14:50:07,715 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:50:07,715 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:50:07,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 14:50:07,716 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:50:07,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:50:07,717 INFO L85 PathProgramCache]: Analyzing trace with hash 736314454, now seen corresponding path program 1 times [2022-11-23 14:50:07,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:50:07,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150939896] [2022-11-23 14:50:07,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:50:07,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:50:07,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:50:07,887 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 14:50:07,887 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:50:07,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150939896] [2022-11-23 14:50:07,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150939896] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:50:07,888 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:50:07,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:50:07,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106755914] [2022-11-23 14:50:07,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:50:07,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:50:07,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:50:07,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:50:07,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:50:07,891 INFO L87 Difference]: Start difference. First operand 5530 states and 8954 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-23 14:50:08,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:50:08,935 INFO L93 Difference]: Finished difference Result 16509 states and 27181 transitions. [2022-11-23 14:50:08,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:50:08,936 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 97 [2022-11-23 14:50:08,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:50:09,051 INFO L225 Difference]: With dead ends: 16509 [2022-11-23 14:50:09,051 INFO L226 Difference]: Without dead ends: 11016 [2022-11-23 14:50:09,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:50:09,091 INFO L413 NwaCegarLoop]: 689 mSDtfsCounter, 550 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 1236 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:50:09,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [550 Valid, 1236 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:50:09,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11016 states. [2022-11-23 14:50:09,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11016 to 10985. [2022-11-23 14:50:10,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10985 states, 7853 states have (on average 1.5846173436903095) internal successors, (12444), 8321 states have internal predecessors, (12444), 2468 states have call successors, (2468), 633 states have call predecessors, (2468), 663 states have return successors, (3184), 2250 states have call predecessors, (3184), 2463 states have call successors, (3184) [2022-11-23 14:50:10,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10985 states to 10985 states and 18096 transitions. [2022-11-23 14:50:10,105 INFO L78 Accepts]: Start accepts. Automaton has 10985 states and 18096 transitions. Word has length 97 [2022-11-23 14:50:10,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:50:10,107 INFO L495 AbstractCegarLoop]: Abstraction has 10985 states and 18096 transitions. [2022-11-23 14:50:10,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-23 14:50:10,109 INFO L276 IsEmpty]: Start isEmpty. Operand 10985 states and 18096 transitions. [2022-11-23 14:50:10,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-23 14:50:10,112 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:50:10,113 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:50:10,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 14:50:10,113 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:50:10,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:50:10,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1350781259, now seen corresponding path program 1 times [2022-11-23 14:50:10,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:50:10,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215905065] [2022-11-23 14:50:10,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:50:10,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:50:10,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:50:10,260 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 14:50:10,260 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:50:10,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215905065] [2022-11-23 14:50:10,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215905065] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:50:10,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:50:10,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:50:10,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734903351] [2022-11-23 14:50:10,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:50:10,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:50:10,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:50:10,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:50:10,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:50:10,264 INFO L87 Difference]: Start difference. First operand 10985 states and 18096 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-23 14:50:11,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:50:11,074 INFO L93 Difference]: Finished difference Result 11699 states and 19315 transitions. [2022-11-23 14:50:11,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:50:11,075 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 98 [2022-11-23 14:50:11,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:50:11,189 INFO L225 Difference]: With dead ends: 11699 [2022-11-23 14:50:11,189 INFO L226 Difference]: Without dead ends: 11688 [2022-11-23 14:50:11,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:50:11,200 INFO L413 NwaCegarLoop]: 682 mSDtfsCounter, 536 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 1234 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:50:11,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [536 Valid, 1234 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:50:11,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11688 states. [2022-11-23 14:50:12,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11688 to 11658. [2022-11-23 14:50:12,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11658 states, 8334 states have (on average 1.583993280537557) internal successors, (13201), 8831 states have internal predecessors, (13201), 2620 states have call successors, (2620), 672 states have call predecessors, (2620), 703 states have return successors, (3438), 2387 states have call predecessors, (3438), 2615 states have call successors, (3438) [2022-11-23 14:50:12,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11658 states to 11658 states and 19259 transitions. [2022-11-23 14:50:12,601 INFO L78 Accepts]: Start accepts. Automaton has 11658 states and 19259 transitions. Word has length 98 [2022-11-23 14:50:12,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:50:12,602 INFO L495 AbstractCegarLoop]: Abstraction has 11658 states and 19259 transitions. [2022-11-23 14:50:12,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-23 14:50:12,602 INFO L276 IsEmpty]: Start isEmpty. Operand 11658 states and 19259 transitions. [2022-11-23 14:50:12,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-11-23 14:50:12,610 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:50:12,611 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:50:12,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 14:50:12,611 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:50:12,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:50:12,612 INFO L85 PathProgramCache]: Analyzing trace with hash 882062043, now seen corresponding path program 1 times [2022-11-23 14:50:12,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:50:12,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913481452] [2022-11-23 14:50:12,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:50:12,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:50:12,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:50:12,912 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-23 14:50:12,913 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:50:12,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913481452] [2022-11-23 14:50:12,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913481452] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:50:12,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:50:12,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:50:12,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228854812] [2022-11-23 14:50:12,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:50:12,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:50:12,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:50:12,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:50:12,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:50:12,916 INFO L87 Difference]: Start difference. First operand 11658 states and 19259 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, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-23 14:50:13,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:50:13,912 INFO L93 Difference]: Finished difference Result 24693 states and 41692 transitions. [2022-11-23 14:50:13,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:50:13,914 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, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 147 [2022-11-23 14:50:13,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:50:14,000 INFO L225 Difference]: With dead ends: 24693 [2022-11-23 14:50:14,000 INFO L226 Difference]: Without dead ends: 13052 [2022-11-23 14:50:14,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:50:14,075 INFO L413 NwaCegarLoop]: 600 mSDtfsCounter, 77 mSDsluCounter, 1111 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 1711 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:50:14,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 1711 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:50:14,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13052 states. [2022-11-23 14:50:15,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13052 to 12014. [2022-11-23 14:50:15,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12014 states, 8642 states have (on average 1.577991205739412) internal successors, (13637), 9139 states have internal predecessors, (13637), 2652 states have call successors, (2652), 672 states have call predecessors, (2652), 719 states have return successors, (3551), 2419 states have call predecessors, (3551), 2647 states have call successors, (3551) [2022-11-23 14:50:15,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12014 states to 12014 states and 19840 transitions. [2022-11-23 14:50:15,293 INFO L78 Accepts]: Start accepts. Automaton has 12014 states and 19840 transitions. Word has length 147 [2022-11-23 14:50:15,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:50:15,293 INFO L495 AbstractCegarLoop]: Abstraction has 12014 states and 19840 transitions. [2022-11-23 14:50:15,294 INFO L496 AbstractCegarLoop]: INTERPOLANT 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, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-23 14:50:15,294 INFO L276 IsEmpty]: Start isEmpty. Operand 12014 states and 19840 transitions. [2022-11-23 14:50:15,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-11-23 14:50:15,302 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:50:15,302 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:50:15,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-23 14:50:15,303 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:50:15,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:50:15,303 INFO L85 PathProgramCache]: Analyzing trace with hash -61041865, now seen corresponding path program 1 times [2022-11-23 14:50:15,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:50:15,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277564364] [2022-11-23 14:50:15,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:50:15,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:50:15,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:50:15,958 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-23 14:50:15,958 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:50:15,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277564364] [2022-11-23 14:50:15,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277564364] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:50:15,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344887496] [2022-11-23 14:50:15,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:50:15,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:50:15,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e46aaf0-704b-493c-bb1a-367d2d73ceb7/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:50:15,967 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e46aaf0-704b-493c-bb1a-367d2d73ceb7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:50:16,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e46aaf0-704b-493c-bb1a-367d2d73ceb7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 14:50:16,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:50:16,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:50:16,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:50:16,664 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-23 14:50:16,664 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:50:16,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344887496] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:50:16,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:50:16,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2022-11-23 14:50:16,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428361618] [2022-11-23 14:50:16,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:50:16,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:50:16,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:50:16,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:50:16,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-11-23 14:50:16,668 INFO L87 Difference]: Start difference. First operand 12014 states and 19840 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-23 14:50:18,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:50:18,338 INFO L93 Difference]: Finished difference Result 25337 states and 42892 transitions. [2022-11-23 14:50:18,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:50:18,339 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 154 [2022-11-23 14:50:18,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:50:18,445 INFO L225 Difference]: With dead ends: 25337 [2022-11-23 14:50:18,446 INFO L226 Difference]: Without dead ends: 13340 [2022-11-23 14:50:18,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-11-23 14:50:18,516 INFO L413 NwaCegarLoop]: 492 mSDtfsCounter, 213 mSDsluCounter, 960 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1452 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:50:18,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1452 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 14:50:18,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13340 states. [2022-11-23 14:50:19,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13340 to 13340. [2022-11-23 14:50:19,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13340 states, 9934 states have (on average 1.6226092208576606) internal successors, (16119), 10431 states have internal predecessors, (16119), 2652 states have call successors, (2652), 706 states have call predecessors, (2652), 753 states have return successors, (3551), 2419 states have call predecessors, (3551), 2647 states have call successors, (3551) [2022-11-23 14:50:19,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13340 states to 13340 states and 22322 transitions. [2022-11-23 14:50:19,619 INFO L78 Accepts]: Start accepts. Automaton has 13340 states and 22322 transitions. Word has length 154 [2022-11-23 14:50:19,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:50:19,620 INFO L495 AbstractCegarLoop]: Abstraction has 13340 states and 22322 transitions. [2022-11-23 14:50:19,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-23 14:50:19,621 INFO L276 IsEmpty]: Start isEmpty. Operand 13340 states and 22322 transitions. [2022-11-23 14:50:19,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-11-23 14:50:19,633 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:50:19,633 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:50:19,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e46aaf0-704b-493c-bb1a-367d2d73ceb7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 14:50:19,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e46aaf0-704b-493c-bb1a-367d2d73ceb7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:50:19,843 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:50:19,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:50:19,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1560640415, now seen corresponding path program 1 times [2022-11-23 14:50:19,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:50:19,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408004129] [2022-11-23 14:50:19,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:50:19,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:50:20,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:50:20,246 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-23 14:50:20,246 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:50:20,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408004129] [2022-11-23 14:50:20,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408004129] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:50:20,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546727873] [2022-11-23 14:50:20,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:50:20,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:50:20,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e46aaf0-704b-493c-bb1a-367d2d73ceb7/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:50:20,251 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e46aaf0-704b-493c-bb1a-367d2d73ceb7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:50:20,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e46aaf0-704b-493c-bb1a-367d2d73ceb7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 14:50:20,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:50:20,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 1892 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:50:20,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:50:20,761 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-23 14:50:20,762 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:50:20,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546727873] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:50:20,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:50:20,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-23 14:50:20,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733501416] [2022-11-23 14:50:20,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:50:20,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:50:20,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:50:20,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:50:20,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:50:20,765 INFO L87 Difference]: Start difference. First operand 13340 states and 22322 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-23 14:50:21,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:50:21,764 INFO L93 Difference]: Finished difference Result 27989 states and 47822 transitions. [2022-11-23 14:50:21,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:50:21,764 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 159 [2022-11-23 14:50:21,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:50:21,882 INFO L225 Difference]: With dead ends: 27989 [2022-11-23 14:50:21,882 INFO L226 Difference]: Without dead ends: 14666 [2022-11-23 14:50:21,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:50:21,952 INFO L413 NwaCegarLoop]: 492 mSDtfsCounter, 211 mSDsluCounter, 960 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1452 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:50:21,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1452 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 14:50:21,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14666 states. [2022-11-23 14:50:22,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14666 to 14666. [2022-11-23 14:50:22,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14666 states, 11226 states have (on average 1.6569570639586675) internal successors, (18601), 11723 states have internal predecessors, (18601), 2652 states have call successors, (2652), 740 states have call predecessors, (2652), 787 states have return successors, (3551), 2419 states have call predecessors, (3551), 2647 states have call successors, (3551) [2022-11-23 14:50:23,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14666 states to 14666 states and 24804 transitions. [2022-11-23 14:50:23,009 INFO L78 Accepts]: Start accepts. Automaton has 14666 states and 24804 transitions. Word has length 159 [2022-11-23 14:50:23,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:50:23,010 INFO L495 AbstractCegarLoop]: Abstraction has 14666 states and 24804 transitions. [2022-11-23 14:50:23,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-23 14:50:23,010 INFO L276 IsEmpty]: Start isEmpty. Operand 14666 states and 24804 transitions. [2022-11-23 14:50:23,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-11-23 14:50:23,018 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:50:23,019 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:50:23,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e46aaf0-704b-493c-bb1a-367d2d73ceb7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 14:50:23,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e46aaf0-704b-493c-bb1a-367d2d73ceb7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-23 14:50:23,229 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:50:23,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:50:23,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1628656001, now seen corresponding path program 1 times [2022-11-23 14:50:23,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:50:23,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196734180] [2022-11-23 14:50:23,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:50:23,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:50:23,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:50:23,510 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-23 14:50:23,511 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:50:23,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196734180] [2022-11-23 14:50:23,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196734180] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:50:23,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479058450] [2022-11-23 14:50:23,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:50:23,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:50:23,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e46aaf0-704b-493c-bb1a-367d2d73ceb7/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:50:23,514 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e46aaf0-704b-493c-bb1a-367d2d73ceb7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:50:23,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e46aaf0-704b-493c-bb1a-367d2d73ceb7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 14:50:23,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:50:23,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 1896 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:50:23,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:50:24,020 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-23 14:50:24,021 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:50:24,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479058450] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:50:24,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:50:24,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-23 14:50:24,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294104954] [2022-11-23 14:50:24,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:50:24,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:50:24,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:50:24,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:50:24,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:50:24,024 INFO L87 Difference]: Start difference. First operand 14666 states and 24804 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-23 14:50:25,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:50:25,165 INFO L93 Difference]: Finished difference Result 30641 states and 52752 transitions. [2022-11-23 14:50:25,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:50:25,166 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 163 [2022-11-23 14:50:25,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:50:25,272 INFO L225 Difference]: With dead ends: 30641 [2022-11-23 14:50:25,273 INFO L226 Difference]: Without dead ends: 15992 [2022-11-23 14:50:25,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:50:25,338 INFO L413 NwaCegarLoop]: 492 mSDtfsCounter, 209 mSDsluCounter, 960 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1452 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:50:25,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1452 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 14:50:25,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15992 states. [2022-11-23 14:50:26,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15992 to 15992. [2022-11-23 14:50:26,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15992 states, 12518 states have (on average 1.6842147307876658) internal successors, (21083), 13015 states have internal predecessors, (21083), 2652 states have call successors, (2652), 774 states have call predecessors, (2652), 821 states have return successors, (3551), 2419 states have call predecessors, (3551), 2647 states have call successors, (3551) [2022-11-23 14:50:26,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15992 states to 15992 states and 27286 transitions. [2022-11-23 14:50:26,503 INFO L78 Accepts]: Start accepts. Automaton has 15992 states and 27286 transitions. Word has length 163 [2022-11-23 14:50:26,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:50:26,504 INFO L495 AbstractCegarLoop]: Abstraction has 15992 states and 27286 transitions. [2022-11-23 14:50:26,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-23 14:50:26,504 INFO L276 IsEmpty]: Start isEmpty. Operand 15992 states and 27286 transitions. [2022-11-23 14:50:26,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-11-23 14:50:26,515 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:50:26,516 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:50:26,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e46aaf0-704b-493c-bb1a-367d2d73ceb7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 14:50:26,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e46aaf0-704b-493c-bb1a-367d2d73ceb7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-23 14:50:26,725 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:50:26,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:50:26,725 INFO L85 PathProgramCache]: Analyzing trace with hash 908791093, now seen corresponding path program 1 times [2022-11-23 14:50:26,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:50:26,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393882068] [2022-11-23 14:50:26,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:50:26,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:50:26,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:50:26,995 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-23 14:50:26,995 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:50:26,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393882068] [2022-11-23 14:50:26,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393882068] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:50:26,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331996844] [2022-11-23 14:50:26,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:50:26,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:50:26,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e46aaf0-704b-493c-bb1a-367d2d73ceb7/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:50:26,998 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e46aaf0-704b-493c-bb1a-367d2d73ceb7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:50:27,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e46aaf0-704b-493c-bb1a-367d2d73ceb7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 14:50:27,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:50:27,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 1899 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:50:27,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:50:27,510 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-23 14:50:27,510 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:50:27,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331996844] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:50:27,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:50:27,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-23 14:50:27,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587602124] [2022-11-23 14:50:27,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:50:27,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:50:27,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:50:27,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:50:27,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:50:27,514 INFO L87 Difference]: Start difference. First operand 15992 states and 27286 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-23 14:50:28,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:50:28,794 INFO L93 Difference]: Finished difference Result 33293 states and 57682 transitions. [2022-11-23 14:50:28,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:50:28,795 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 166 [2022-11-23 14:50:28,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:50:28,896 INFO L225 Difference]: With dead ends: 33293 [2022-11-23 14:50:28,897 INFO L226 Difference]: Without dead ends: 17318 [2022-11-23 14:50:28,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:50:28,949 INFO L413 NwaCegarLoop]: 492 mSDtfsCounter, 207 mSDsluCounter, 960 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1452 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:50:28,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1452 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 14:50:28,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17318 states. [2022-11-23 14:50:29,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17318 to 17318. [2022-11-23 14:50:29,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17318 states, 13810 states have (on average 1.7063721940622738) internal successors, (23565), 14307 states have internal predecessors, (23565), 2652 states have call successors, (2652), 808 states have call predecessors, (2652), 855 states have return successors, (3551), 2419 states have call predecessors, (3551), 2647 states have call successors, (3551) [2022-11-23 14:50:30,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17318 states to 17318 states and 29768 transitions. [2022-11-23 14:50:30,048 INFO L78 Accepts]: Start accepts. Automaton has 17318 states and 29768 transitions. Word has length 166 [2022-11-23 14:50:30,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:50:30,049 INFO L495 AbstractCegarLoop]: Abstraction has 17318 states and 29768 transitions. [2022-11-23 14:50:30,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-23 14:50:30,049 INFO L276 IsEmpty]: Start isEmpty. Operand 17318 states and 29768 transitions. [2022-11-23 14:50:30,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-11-23 14:50:30,057 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:50:30,058 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:50:30,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e46aaf0-704b-493c-bb1a-367d2d73ceb7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 14:50:30,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e46aaf0-704b-493c-bb1a-367d2d73ceb7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-23 14:50:30,267 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:50:30,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:50:30,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1331330039, now seen corresponding path program 1 times [2022-11-23 14:50:30,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:50:30,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94941380] [2022-11-23 14:50:30,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:50:30,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:50:30,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:50:35,814 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-23 14:50:35,815 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:50:35,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94941380] [2022-11-23 14:50:35,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94941380] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:50:35,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669368995] [2022-11-23 14:50:35,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:50:35,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:50:35,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e46aaf0-704b-493c-bb1a-367d2d73ceb7/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:50:35,819 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e46aaf0-704b-493c-bb1a-367d2d73ceb7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:50:35,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e46aaf0-704b-493c-bb1a-367d2d73ceb7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 14:50:36,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:50:36,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 1901 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:50:36,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:50:36,460 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-23 14:50:36,460 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:50:36,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669368995] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:50:36,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:50:36,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [37] total 39 [2022-11-23 14:50:36,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227802260] [2022-11-23 14:50:36,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:50:36,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:50:36,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:50:36,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:50:36,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1397, Unknown=0, NotChecked=0, Total=1482 [2022-11-23 14:50:36,462 INFO L87 Difference]: Start difference. First operand 17318 states and 29768 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-23 14:50:37,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:50:37,343 INFO L93 Difference]: Finished difference Result 35945 states and 62612 transitions. [2022-11-23 14:50:37,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:50:37,344 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 168 [2022-11-23 14:50:37,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:50:37,448 INFO L225 Difference]: With dead ends: 35945 [2022-11-23 14:50:37,449 INFO L226 Difference]: Without dead ends: 18644 [2022-11-23 14:50:37,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=89, Invalid=1471, Unknown=0, NotChecked=0, Total=1560 [2022-11-23 14:50:37,596 INFO L413 NwaCegarLoop]: 492 mSDtfsCounter, 205 mSDsluCounter, 960 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 1452 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:50:37,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 1452 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 14:50:37,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18644 states. [2022-11-23 14:50:38,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18644 to 18644. [2022-11-23 14:50:38,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18644 states, 15102 states have (on average 1.7247384452390413) internal successors, (26047), 15599 states have internal predecessors, (26047), 2652 states have call successors, (2652), 842 states have call predecessors, (2652), 889 states have return successors, (3551), 2419 states have call predecessors, (3551), 2647 states have call successors, (3551) [2022-11-23 14:50:38,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18644 states to 18644 states and 32250 transitions. [2022-11-23 14:50:38,495 INFO L78 Accepts]: Start accepts. Automaton has 18644 states and 32250 transitions. Word has length 168 [2022-11-23 14:50:38,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:50:38,496 INFO L495 AbstractCegarLoop]: Abstraction has 18644 states and 32250 transitions. [2022-11-23 14:50:38,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-23 14:50:38,497 INFO L276 IsEmpty]: Start isEmpty. Operand 18644 states and 32250 transitions. [2022-11-23 14:50:38,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-11-23 14:50:38,504 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:50:38,505 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:50:38,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e46aaf0-704b-493c-bb1a-367d2d73ceb7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 14:50:38,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e46aaf0-704b-493c-bb1a-367d2d73ceb7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:50:38,715 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:50:38,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:50:38,715 INFO L85 PathProgramCache]: Analyzing trace with hash -2021768024, now seen corresponding path program 1 times [2022-11-23 14:50:38,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:50:38,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827365869] [2022-11-23 14:50:38,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:50:38,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:50:38,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:50:43,699 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-23 14:50:43,700 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:50:43,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827365869] [2022-11-23 14:50:43,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827365869] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:50:43,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777151025] [2022-11-23 14:50:43,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:50:43,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:50:43,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e46aaf0-704b-493c-bb1a-367d2d73ceb7/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:50:43,702 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e46aaf0-704b-493c-bb1a-367d2d73ceb7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:50:43,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e46aaf0-704b-493c-bb1a-367d2d73ceb7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 14:50:44,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:50:44,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 1898 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 14:50:44,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:50:44,368 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-23 14:50:44,368 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:50:44,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777151025] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:50:44,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:50:44,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [37] total 39 [2022-11-23 14:50:44,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284444311] [2022-11-23 14:50:44,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:50:44,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:50:44,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:50:44,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:50:44,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1397, Unknown=0, NotChecked=0, Total=1482 [2022-11-23 14:50:44,372 INFO L87 Difference]: Start difference. First operand 18644 states and 32250 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 3 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2022-11-23 14:50:45,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:50:45,133 INFO L93 Difference]: Finished difference Result 38660 states and 66835 transitions. [2022-11-23 14:50:45,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:50:45,134 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 3 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) Word has length 168 [2022-11-23 14:50:45,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:50:45,215 INFO L225 Difference]: With dead ends: 38660 [2022-11-23 14:50:45,215 INFO L226 Difference]: Without dead ends: 20078 [2022-11-23 14:50:45,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=89, Invalid=1471, Unknown=0, NotChecked=0, Total=1560 [2022-11-23 14:50:45,254 INFO L413 NwaCegarLoop]: 633 mSDtfsCounter, 325 mSDsluCounter, 941 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 1574 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:50:45,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 1574 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:50:45,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20078 states. [2022-11-23 14:50:46,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20078 to 19890. [2022-11-23 14:50:46,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19890 states, 15884 states have (on average 1.7021531100478469) internal successors, (27037), 16400 states have internal predecessors, (27037), 2943 states have call successors, (2943), 1029 states have call predecessors, (2943), 1062 states have return successors, (4331), 2676 states have call predecessors, (4331), 2938 states have call successors, (4331) [2022-11-23 14:50:46,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19890 states to 19890 states and 34311 transitions. [2022-11-23 14:50:46,251 INFO L78 Accepts]: Start accepts. Automaton has 19890 states and 34311 transitions. Word has length 168 [2022-11-23 14:50:46,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:50:46,251 INFO L495 AbstractCegarLoop]: Abstraction has 19890 states and 34311 transitions. [2022-11-23 14:50:46,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 3 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2022-11-23 14:50:46,252 INFO L276 IsEmpty]: Start isEmpty. Operand 19890 states and 34311 transitions. [2022-11-23 14:50:46,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-11-23 14:50:46,260 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:50:46,260 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:50:46,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e46aaf0-704b-493c-bb1a-367d2d73ceb7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 14:50:46,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e46aaf0-704b-493c-bb1a-367d2d73ceb7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-23 14:50:46,469 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:50:46,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:50:46,469 INFO L85 PathProgramCache]: Analyzing trace with hash 717778979, now seen corresponding path program 1 times [2022-11-23 14:50:46,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:50:46,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636337012] [2022-11-23 14:50:46,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:50:46,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:50:46,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:50:50,575 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-23 14:50:50,575 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:50:50,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636337012] [2022-11-23 14:50:50,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636337012] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:50:50,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893159807] [2022-11-23 14:50:50,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:50:50,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:50:50,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e46aaf0-704b-493c-bb1a-367d2d73ceb7/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:50:50,579 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e46aaf0-704b-493c-bb1a-367d2d73ceb7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:50:50,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e46aaf0-704b-493c-bb1a-367d2d73ceb7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 14:50:50,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:50:50,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 1903 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 14:50:50,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:50:51,536 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-23 14:50:51,536 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:50:51,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893159807] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:50:51,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:50:51,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [37] total 44 [2022-11-23 14:50:51,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184644669] [2022-11-23 14:50:51,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:50:51,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-23 14:50:51,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:50:51,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-23 14:50:51,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1763, Unknown=0, NotChecked=0, Total=1892 [2022-11-23 14:50:51,539 INFO L87 Difference]: Start difference. First operand 19890 states and 34311 transitions. Second operand has 9 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 6 states have call successors, (27), 5 states have call predecessors, (27), 5 states have return successors, (26), 7 states have call predecessors, (26), 5 states have call successors, (26) [2022-11-23 14:50:56,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:50:56,593 INFO L93 Difference]: Finished difference Result 41907 states and 72917 transitions. [2022-11-23 14:50:56,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-23 14:50:56,594 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 6 states have call successors, (27), 5 states have call predecessors, (27), 5 states have return successors, (26), 7 states have call predecessors, (26), 5 states have call successors, (26) Word has length 171 [2022-11-23 14:50:56,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:50:56,664 INFO L225 Difference]: With dead ends: 41907 [2022-11-23 14:50:56,664 INFO L226 Difference]: Without dead ends: 22039 [2022-11-23 14:50:56,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=244, Invalid=2408, Unknown=0, NotChecked=0, Total=2652 [2022-11-23 14:50:56,717 INFO L413 NwaCegarLoop]: 440 mSDtfsCounter, 1241 mSDsluCounter, 1428 mSDsCounter, 0 mSdLazyCounter, 5415 mSolverCounterSat, 510 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1382 SdHoareTripleChecker+Valid, 1868 SdHoareTripleChecker+Invalid, 5925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 510 IncrementalHoareTripleChecker+Valid, 5415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:50:56,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1382 Valid, 1868 Invalid, 5925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [510 Valid, 5415 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-11-23 14:50:56,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22039 states. [2022-11-23 14:50:57,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22039 to 21457. [2022-11-23 14:50:57,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21457 states, 16982 states have (on average 1.6668236956777764) internal successors, (28306), 17541 states have internal predecessors, (28306), 3195 states have call successors, (3195), 1237 states have call predecessors, (3195), 1279 states have return successors, (4924), 2918 states have call predecessors, (4924), 3190 states have call successors, (4924) [2022-11-23 14:50:57,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21457 states to 21457 states and 36425 transitions. [2022-11-23 14:50:57,995 INFO L78 Accepts]: Start accepts. Automaton has 21457 states and 36425 transitions. Word has length 171 [2022-11-23 14:50:57,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:50:57,996 INFO L495 AbstractCegarLoop]: Abstraction has 21457 states and 36425 transitions. [2022-11-23 14:50:57,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 6 states have call successors, (27), 5 states have call predecessors, (27), 5 states have return successors, (26), 7 states have call predecessors, (26), 5 states have call successors, (26) [2022-11-23 14:50:57,996 INFO L276 IsEmpty]: Start isEmpty. Operand 21457 states and 36425 transitions. [2022-11-23 14:50:58,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-11-23 14:50:58,007 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:50:58,007 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:50:58,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e46aaf0-704b-493c-bb1a-367d2d73ceb7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 14:50:58,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e46aaf0-704b-493c-bb1a-367d2d73ceb7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-23 14:50:58,216 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:50:58,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:50:58,216 INFO L85 PathProgramCache]: Analyzing trace with hash -810272456, now seen corresponding path program 1 times [2022-11-23 14:50:58,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:50:58,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264362590] [2022-11-23 14:50:58,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:50:58,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:50:58,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:51:02,456 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-23 14:51:02,456 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:51:02,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264362590] [2022-11-23 14:51:02,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264362590] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:51:02,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531049052] [2022-11-23 14:51:02,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:51:02,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:51:02,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e46aaf0-704b-493c-bb1a-367d2d73ceb7/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:51:02,458 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e46aaf0-704b-493c-bb1a-367d2d73ceb7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:51:02,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e46aaf0-704b-493c-bb1a-367d2d73ceb7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 14:51:02,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:51:02,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 1904 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-23 14:51:02,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:51:02,936 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-11-23 14:51:02,936 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:51:02,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531049052] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:51:02,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:51:02,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [37] total 39 [2022-11-23 14:51:02,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894425942] [2022-11-23 14:51:02,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:51:02,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:51:02,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:51:02,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:51:02,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1397, Unknown=0, NotChecked=0, Total=1482 [2022-11-23 14:51:02,939 INFO L87 Difference]: Start difference. First operand 21457 states and 36425 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 2 states have call predecessors, (26), 1 states have call successors, (26) [2022-11-23 14:51:03,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:51:03,720 INFO L93 Difference]: Finished difference Result 22189 states and 38920 transitions. [2022-11-23 14:51:03,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:51:03,721 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 2 states have call predecessors, (26), 1 states have call successors, (26) Word has length 171 [2022-11-23 14:51:03,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:51:03,830 INFO L225 Difference]: With dead ends: 22189 [2022-11-23 14:51:03,830 INFO L226 Difference]: Without dead ends: 22103 [2022-11-23 14:51:03,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=89, Invalid=1471, Unknown=0, NotChecked=0, Total=1560 [2022-11-23 14:51:03,848 INFO L413 NwaCegarLoop]: 594 mSDtfsCounter, 44 mSDsluCounter, 1137 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1731 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:51:03,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 1731 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:51:03,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22103 states. [2022-11-23 14:51:04,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22103 to 21557. [2022-11-23 14:51:04,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21557 states, 17082 states have (on average 1.6629200327830465) internal successors, (28406), 17641 states have internal predecessors, (28406), 3195 states have call successors, (3195), 1237 states have call predecessors, (3195), 1279 states have return successors, (4924), 2918 states have call predecessors, (4924), 3190 states have call successors, (4924) [2022-11-23 14:51:04,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21557 states to 21557 states and 36525 transitions. [2022-11-23 14:51:04,757 INFO L78 Accepts]: Start accepts. Automaton has 21557 states and 36525 transitions. Word has length 171 [2022-11-23 14:51:04,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:51:04,758 INFO L495 AbstractCegarLoop]: Abstraction has 21557 states and 36525 transitions. [2022-11-23 14:51:04,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 2 states have call predecessors, (26), 1 states have call successors, (26) [2022-11-23 14:51:04,758 INFO L276 IsEmpty]: Start isEmpty. Operand 21557 states and 36525 transitions. [2022-11-23 14:51:04,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-23 14:51:04,766 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:51:04,766 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:51:04,777 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e46aaf0-704b-493c-bb1a-367d2d73ceb7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-23 14:51:04,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e46aaf0-704b-493c-bb1a-367d2d73ceb7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-23 14:51:04,977 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:51:04,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:51:04,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1561524590, now seen corresponding path program 1 times [2022-11-23 14:51:04,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:51:04,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48006701] [2022-11-23 14:51:04,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:51:04,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:51:05,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:51:08,405 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-11-23 14:51:08,406 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:51:08,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48006701] [2022-11-23 14:51:08,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48006701] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:51:08,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194271999] [2022-11-23 14:51:08,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:51:08,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:51:08,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e46aaf0-704b-493c-bb1a-367d2d73ceb7/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:51:08,415 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e46aaf0-704b-493c-bb1a-367d2d73ceb7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:51:08,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e46aaf0-704b-493c-bb1a-367d2d73ceb7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 14:51:08,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:51:08,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 1968 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-23 14:51:08,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:51:10,164 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-11-23 14:51:10,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:51:13,538 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-11-23 14:51:21,022 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions. [2022-11-23 14:51:21,395 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-11-23 14:51:28,993 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions. [2022-11-23 14:51:29,379 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-11-23 14:51:38,533 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions. [2022-11-23 14:51:38,799 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 49188 disjunctions. This might take some time... [2022-11-23 14:55:37,947 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 49188 disjunctions. [2022-11-23 14:55:38,557 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-11-23 14:56:00,150 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions.