./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/kundu1.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/kundu1.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V --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 c114a15ea6b1c9b012290758a6a9559b9c02a944706c9768958a3bd9c86822a7 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:10:33,797 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:10:33,800 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:10:33,839 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:10:33,840 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:10:33,841 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:10:33,844 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:10:33,847 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:10:33,849 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:10:33,851 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:10:33,853 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:10:33,854 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:10:33,855 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:10:33,857 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:10:33,859 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:10:33,861 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:10:33,863 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:10:33,865 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:10:33,868 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:10:33,871 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:10:33,874 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:10:33,876 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:10:33,878 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:10:33,880 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:10:33,885 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:10:33,885 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:10:33,886 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:10:33,888 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:10:33,889 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:10:33,891 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:10:33,891 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:10:33,893 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:10:33,894 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:10:33,896 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:10:33,898 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:10:33,898 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:10:33,901 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:10:33,902 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:10:33,902 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:10:33,904 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:10:33,905 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:10:33,906 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 02:10:33,959 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:10:33,962 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:10:33,963 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:10:33,963 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:10:33,964 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:10:33,971 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:10:33,971 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:10:33,972 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:10:33,972 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:10:33,972 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:10:33,974 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:10:33,974 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:10:33,974 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:10:33,975 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:10:33,975 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:10:33,975 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:10:33,975 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:10:33,976 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:10:33,977 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:10:33,977 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:10:33,977 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:10:33,978 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:10:33,978 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:10:33,978 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:10:33,978 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:10:33,979 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:10:33,980 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:10:33,981 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:10:33,981 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:10:33,981 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:10:33,982 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:10:33,982 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:10:33,982 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:10:33,983 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:10:33,983 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:10:33,983 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:10:33,984 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:10:33,984 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:10:33,984 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:10:33,984 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:10:33,985 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:10:33,985 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c114a15ea6b1c9b012290758a6a9559b9c02a944706c9768958a3bd9c86822a7 [2021-11-23 02:10:34,330 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:10:34,373 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:10:34,376 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:10:34,377 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:10:34,379 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:10:34,380 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/systemc/kundu1.cil.c [2021-11-23 02:10:34,480 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/data/c953eed08/214e2712652d4d21aadf9ede4ba641bf/FLAGff467c3c8 [2021-11-23 02:10:35,088 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:10:35,090 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/sv-benchmarks/c/systemc/kundu1.cil.c [2021-11-23 02:10:35,111 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/data/c953eed08/214e2712652d4d21aadf9ede4ba641bf/FLAGff467c3c8 [2021-11-23 02:10:35,388 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/data/c953eed08/214e2712652d4d21aadf9ede4ba641bf [2021-11-23 02:10:35,391 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:10:35,393 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:10:35,395 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:10:35,395 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:10:35,399 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:10:35,400 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:10:35" (1/1) ... [2021-11-23 02:10:35,402 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@640307dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:35, skipping insertion in model container [2021-11-23 02:10:35,402 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:10:35" (1/1) ... [2021-11-23 02:10:35,411 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:10:35,456 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:10:35,667 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/sv-benchmarks/c/systemc/kundu1.cil.c[636,649] [2021-11-23 02:10:35,732 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:10:35,743 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:10:35,757 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/sv-benchmarks/c/systemc/kundu1.cil.c[636,649] [2021-11-23 02:10:35,787 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:10:35,807 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:10:35,807 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:35 WrapperNode [2021-11-23 02:10:35,808 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:10:35,809 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:10:35,809 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:10:35,809 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:10:35,819 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:35" (1/1) ... [2021-11-23 02:10:35,830 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:35" (1/1) ... [2021-11-23 02:10:35,863 INFO L137 Inliner]: procedures = 32, calls = 36, calls flagged for inlining = 15, calls inlined = 15, statements flattened = 257 [2021-11-23 02:10:35,863 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:10:35,864 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:10:35,864 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:10:35,865 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:10:35,874 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:35" (1/1) ... [2021-11-23 02:10:35,875 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:35" (1/1) ... [2021-11-23 02:10:35,878 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:35" (1/1) ... [2021-11-23 02:10:35,878 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:35" (1/1) ... [2021-11-23 02:10:35,886 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:35" (1/1) ... [2021-11-23 02:10:35,893 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:35" (1/1) ... [2021-11-23 02:10:35,896 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:35" (1/1) ... [2021-11-23 02:10:35,900 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:10:35,901 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:10:35,901 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:10:35,901 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:10:35,903 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:35" (1/1) ... [2021-11-23 02:10:35,926 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:10:35,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:10:35,966 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:10:36,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:10:36,033 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:10:36,033 INFO L130 BoogieDeclarations]: Found specification of procedure error [2021-11-23 02:10:36,033 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2021-11-23 02:10:36,033 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-11-23 02:10:36,034 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-11-23 02:10:36,034 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-11-23 02:10:36,034 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-11-23 02:10:36,034 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-11-23 02:10:36,035 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-11-23 02:10:36,035 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-11-23 02:10:36,035 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-11-23 02:10:36,036 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:10:36,036 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-11-23 02:10:36,036 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-11-23 02:10:36,036 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:10:36,036 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:10:36,157 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:10:36,159 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:10:36,585 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:10:36,692 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:10:36,692 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-23 02:10:36,696 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:10:36 BoogieIcfgContainer [2021-11-23 02:10:36,696 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:10:36,699 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:10:36,699 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:10:36,703 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:10:36,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:10:35" (1/3) ... [2021-11-23 02:10:36,705 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@494c69b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:10:36, skipping insertion in model container [2021-11-23 02:10:36,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:35" (2/3) ... [2021-11-23 02:10:36,706 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@494c69b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:10:36, skipping insertion in model container [2021-11-23 02:10:36,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:10:36" (3/3) ... [2021-11-23 02:10:36,733 INFO L111 eAbstractionObserver]: Analyzing ICFG kundu1.cil.c [2021-11-23 02:10:36,740 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:10:36,741 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:10:36,803 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:10:36,812 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 02:10:36,813 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:10:36,837 INFO L276 IsEmpty]: Start isEmpty. Operand has 75 states, 52 states have (on average 1.5) internal successors, (78), 56 states have internal predecessors, (78), 15 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-23 02:10:36,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-23 02:10:36,846 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:10:36,847 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:10:36,848 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:10:36,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:10:36,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1624735659, now seen corresponding path program 1 times [2021-11-23 02:10:36,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:10:36,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262288275] [2021-11-23 02:10:36,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:10:36,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:10:36,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:10:37,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:10:37,105 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:10:37,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262288275] [2021-11-23 02:10:37,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262288275] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:10:37,107 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:10:37,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:10:37,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289688915] [2021-11-23 02:10:37,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:10:37,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:10:37,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:10:37,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:10:37,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:10:37,154 INFO L87 Difference]: Start difference. First operand has 75 states, 52 states have (on average 1.5) internal successors, (78), 56 states have internal predecessors, (78), 15 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-23 02:10:37,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:10:37,523 INFO L93 Difference]: Finished difference Result 209 states and 305 transitions. [2021-11-23 02:10:37,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:10:37,541 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2021-11-23 02:10:37,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:10:37,555 INFO L225 Difference]: With dead ends: 209 [2021-11-23 02:10:37,555 INFO L226 Difference]: Without dead ends: 135 [2021-11-23 02:10:37,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:10:37,565 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 177 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:10:37,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 264 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 02:10:37,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-11-23 02:10:37,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 127. [2021-11-23 02:10:37,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 93 states have (on average 1.4301075268817205) internal successors, (133), 96 states have internal predecessors, (133), 23 states have call successors, (23), 11 states have call predecessors, (23), 10 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-23 02:10:37,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 176 transitions. [2021-11-23 02:10:37,669 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 176 transitions. Word has length 34 [2021-11-23 02:10:37,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:10:37,670 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 176 transitions. [2021-11-23 02:10:37,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-23 02:10:37,671 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 176 transitions. [2021-11-23 02:10:37,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-23 02:10:37,674 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:10:37,674 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:10:37,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:10:37,675 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:10:37,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:10:37,678 INFO L85 PathProgramCache]: Analyzing trace with hash 34340682, now seen corresponding path program 1 times [2021-11-23 02:10:37,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:10:37,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943255695] [2021-11-23 02:10:37,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:10:37,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:10:37,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:10:37,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:10:37,816 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:10:37,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943255695] [2021-11-23 02:10:37,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943255695] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:10:37,818 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:10:37,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:10:37,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601225002] [2021-11-23 02:10:37,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:10:37,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:10:37,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:10:37,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:10:37,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:10:37,826 INFO L87 Difference]: Start difference. First operand 127 states and 176 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-23 02:10:38,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:10:38,182 INFO L93 Difference]: Finished difference Result 366 states and 507 transitions. [2021-11-23 02:10:38,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:10:38,183 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2021-11-23 02:10:38,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:10:38,189 INFO L225 Difference]: With dead ends: 366 [2021-11-23 02:10:38,198 INFO L226 Difference]: Without dead ends: 244 [2021-11-23 02:10:38,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:10:38,202 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 169 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:10:38,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 236 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 02:10:38,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-11-23 02:10:38,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 225. [2021-11-23 02:10:38,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 165 states have (on average 1.3636363636363635) internal successors, (225), 168 states have internal predecessors, (225), 39 states have call successors, (39), 21 states have call predecessors, (39), 20 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2021-11-23 02:10:38,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 300 transitions. [2021-11-23 02:10:38,291 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 300 transitions. Word has length 34 [2021-11-23 02:10:38,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:10:38,291 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 300 transitions. [2021-11-23 02:10:38,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-23 02:10:38,292 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 300 transitions. [2021-11-23 02:10:38,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-23 02:10:38,294 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:10:38,294 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:10:38,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:10:38,295 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:10:38,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:10:38,296 INFO L85 PathProgramCache]: Analyzing trace with hash -28804500, now seen corresponding path program 1 times [2021-11-23 02:10:38,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:10:38,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963905912] [2021-11-23 02:10:38,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:10:38,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:10:38,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:10:38,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:10:38,463 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:10:38,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963905912] [2021-11-23 02:10:38,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963905912] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:10:38,464 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:10:38,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:10:38,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351883113] [2021-11-23 02:10:38,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:10:38,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:10:38,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:10:38,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:10:38,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:10:38,467 INFO L87 Difference]: Start difference. First operand 225 states and 300 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-23 02:10:38,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:10:38,665 INFO L93 Difference]: Finished difference Result 607 states and 835 transitions. [2021-11-23 02:10:38,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:10:38,667 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 35 [2021-11-23 02:10:38,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:10:38,679 INFO L225 Difference]: With dead ends: 607 [2021-11-23 02:10:38,679 INFO L226 Difference]: Without dead ends: 435 [2021-11-23 02:10:38,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:10:38,694 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 128 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:10:38,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 335 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:10:38,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-11-23 02:10:38,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 328. [2021-11-23 02:10:38,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 242 states have (on average 1.3636363636363635) internal successors, (330), 245 states have internal predecessors, (330), 55 states have call successors, (55), 31 states have call predecessors, (55), 30 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2021-11-23 02:10:38,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 437 transitions. [2021-11-23 02:10:38,812 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 437 transitions. Word has length 35 [2021-11-23 02:10:38,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:10:38,812 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 437 transitions. [2021-11-23 02:10:38,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-23 02:10:38,813 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 437 transitions. [2021-11-23 02:10:38,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-23 02:10:38,814 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:10:38,815 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:10:38,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 02:10:38,827 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:10:38,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:10:38,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1374328358, now seen corresponding path program 1 times [2021-11-23 02:10:38,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:10:38,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761994715] [2021-11-23 02:10:38,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:10:38,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:10:38,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:10:38,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:10:38,953 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:10:38,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761994715] [2021-11-23 02:10:38,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761994715] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:10:38,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:10:38,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:10:38,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671852145] [2021-11-23 02:10:38,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:10:38,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:10:38,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:10:38,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:10:38,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:10:38,970 INFO L87 Difference]: Start difference. First operand 328 states and 437 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-23 02:10:39,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:10:39,163 INFO L93 Difference]: Finished difference Result 509 states and 680 transitions. [2021-11-23 02:10:39,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:10:39,164 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 43 [2021-11-23 02:10:39,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:10:39,173 INFO L225 Difference]: With dead ends: 509 [2021-11-23 02:10:39,173 INFO L226 Difference]: Without dead ends: 392 [2021-11-23 02:10:39,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:10:39,186 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 150 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:10:39,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 184 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:10:39,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-11-23 02:10:39,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 383. [2021-11-23 02:10:39,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 284 states have (on average 1.3626760563380282) internal successors, (387), 287 states have internal predecessors, (387), 63 states have call successors, (63), 36 states have call predecessors, (63), 35 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2021-11-23 02:10:39,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 510 transitions. [2021-11-23 02:10:39,261 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 510 transitions. Word has length 43 [2021-11-23 02:10:39,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:10:39,263 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 510 transitions. [2021-11-23 02:10:39,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-23 02:10:39,263 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 510 transitions. [2021-11-23 02:10:39,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-23 02:10:39,275 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:10:39,275 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:10:39,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 02:10:39,276 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:10:39,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:10:39,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1322400223, now seen corresponding path program 1 times [2021-11-23 02:10:39,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:10:39,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857317069] [2021-11-23 02:10:39,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:10:39,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:10:39,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:10:39,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:10:39,414 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:10:39,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857317069] [2021-11-23 02:10:39,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857317069] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:10:39,414 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:10:39,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 02:10:39,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884321970] [2021-11-23 02:10:39,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:10:39,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:10:39,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:10:39,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:10:39,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:10:39,423 INFO L87 Difference]: Start difference. First operand 383 states and 510 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-23 02:10:39,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:10:39,862 INFO L93 Difference]: Finished difference Result 1013 states and 1383 transitions. [2021-11-23 02:10:39,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 02:10:39,862 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 46 [2021-11-23 02:10:39,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:10:39,873 INFO L225 Difference]: With dead ends: 1013 [2021-11-23 02:10:39,873 INFO L226 Difference]: Without dead ends: 735 [2021-11-23 02:10:39,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-11-23 02:10:39,884 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 264 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:10:39,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 616 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 02:10:39,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2021-11-23 02:10:39,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 539. [2021-11-23 02:10:39,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 401 states have (on average 1.3591022443890275) internal successors, (545), 404 states have internal predecessors, (545), 87 states have call successors, (87), 51 states have call predecessors, (87), 50 states have return successors, (84), 84 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-23 02:10:39,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 716 transitions. [2021-11-23 02:10:39,969 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 716 transitions. Word has length 46 [2021-11-23 02:10:39,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:10:39,970 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 716 transitions. [2021-11-23 02:10:39,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-23 02:10:39,972 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 716 transitions. [2021-11-23 02:10:39,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-23 02:10:39,976 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:10:39,976 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:10:39,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 02:10:39,977 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:10:39,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:10:39,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1133597288, now seen corresponding path program 1 times [2021-11-23 02:10:39,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:10:39,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233203180] [2021-11-23 02:10:39,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:10:39,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:10:40,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:10:40,092 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:10:40,093 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:10:40,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233203180] [2021-11-23 02:10:40,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233203180] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:10:40,093 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:10:40,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 02:10:40,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052969914] [2021-11-23 02:10:40,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:10:40,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:10:40,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:10:40,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:10:40,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:10:40,096 INFO L87 Difference]: Start difference. First operand 539 states and 716 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-23 02:10:40,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:10:40,413 INFO L93 Difference]: Finished difference Result 1556 states and 2057 transitions. [2021-11-23 02:10:40,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 02:10:40,414 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 48 [2021-11-23 02:10:40,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:10:40,424 INFO L225 Difference]: With dead ends: 1556 [2021-11-23 02:10:40,424 INFO L226 Difference]: Without dead ends: 1023 [2021-11-23 02:10:40,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-23 02:10:40,429 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 179 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:10:40,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 216 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:10:40,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2021-11-23 02:10:40,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 992. [2021-11-23 02:10:40,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 724 states have (on average 1.3342541436464088) internal successors, (966), 727 states have internal predecessors, (966), 167 states have call successors, (167), 101 states have call predecessors, (167), 100 states have return successors, (164), 164 states have call predecessors, (164), 164 states have call successors, (164) [2021-11-23 02:10:40,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1297 transitions. [2021-11-23 02:10:40,592 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1297 transitions. Word has length 48 [2021-11-23 02:10:40,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:10:40,593 INFO L470 AbstractCegarLoop]: Abstraction has 992 states and 1297 transitions. [2021-11-23 02:10:40,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-23 02:10:40,593 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1297 transitions. [2021-11-23 02:10:40,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-23 02:10:40,596 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:10:40,596 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:10:40,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 02:10:40,597 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:10:40,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:10:40,597 INFO L85 PathProgramCache]: Analyzing trace with hash 175129522, now seen corresponding path program 1 times [2021-11-23 02:10:40,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:10:40,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90008974] [2021-11-23 02:10:40,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:10:40,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:10:40,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:10:40,716 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:10:40,716 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:10:40,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90008974] [2021-11-23 02:10:40,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90008974] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:10:40,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630146147] [2021-11-23 02:10:40,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:10:40,717 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:10:40,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:10:40,719 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:10:40,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:10:40,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:10:40,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:10:40,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:10:40,905 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:10:40,905 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:10:40,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630146147] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:10:40,906 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:10:40,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-23 02:10:40,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519306313] [2021-11-23 02:10:40,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:10:40,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:10:40,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:10:40,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:10:40,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:10:40,908 INFO L87 Difference]: Start difference. First operand 992 states and 1297 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-23 02:10:41,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:10:41,081 INFO L93 Difference]: Finished difference Result 2491 states and 3230 transitions. [2021-11-23 02:10:41,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:10:41,082 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 49 [2021-11-23 02:10:41,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:10:41,094 INFO L225 Difference]: With dead ends: 2491 [2021-11-23 02:10:41,095 INFO L226 Difference]: Without dead ends: 1505 [2021-11-23 02:10:41,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:10:41,100 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 40 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:10:41,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 194 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:10:41,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1505 states. [2021-11-23 02:10:41,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1505 to 1235. [2021-11-23 02:10:41,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1235 states, 923 states have (on average 1.333694474539545) internal successors, (1231), 927 states have internal predecessors, (1231), 189 states have call successors, (189), 123 states have call predecessors, (189), 122 states have return successors, (186), 185 states have call predecessors, (186), 186 states have call successors, (186) [2021-11-23 02:10:41,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1235 states to 1235 states and 1606 transitions. [2021-11-23 02:10:41,240 INFO L78 Accepts]: Start accepts. Automaton has 1235 states and 1606 transitions. Word has length 49 [2021-11-23 02:10:41,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:10:41,240 INFO L470 AbstractCegarLoop]: Abstraction has 1235 states and 1606 transitions. [2021-11-23 02:10:41,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-23 02:10:41,241 INFO L276 IsEmpty]: Start isEmpty. Operand 1235 states and 1606 transitions. [2021-11-23 02:10:41,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-23 02:10:41,242 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:10:41,242 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:10:41,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:10:41,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-23 02:10:41,459 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:10:41,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:10:41,459 INFO L85 PathProgramCache]: Analyzing trace with hash -379002054, now seen corresponding path program 1 times [2021-11-23 02:10:41,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:10:41,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84249530] [2021-11-23 02:10:41,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:10:41,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:10:41,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:10:41,538 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:10:41,538 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:10:41,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84249530] [2021-11-23 02:10:41,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84249530] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:10:41,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684013237] [2021-11-23 02:10:41,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:10:41,542 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:10:41,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:10:41,543 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:10:41,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:10:41,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:10:41,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:10:41,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:10:41,719 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:10:41,719 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:10:41,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684013237] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:10:41,720 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:10:41,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-23 02:10:41,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889559686] [2021-11-23 02:10:41,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:10:41,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:10:41,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:10:41,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:10:41,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:10:41,722 INFO L87 Difference]: Start difference. First operand 1235 states and 1606 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-23 02:10:41,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:10:41,890 INFO L93 Difference]: Finished difference Result 2860 states and 3725 transitions. [2021-11-23 02:10:41,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:10:41,891 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 50 [2021-11-23 02:10:41,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:10:41,928 INFO L225 Difference]: With dead ends: 2860 [2021-11-23 02:10:41,928 INFO L226 Difference]: Without dead ends: 1631 [2021-11-23 02:10:41,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:10:41,932 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 40 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:10:41,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 195 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:10:41,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1631 states. [2021-11-23 02:10:42,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1631 to 1437. [2021-11-23 02:10:42,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1437 states, 1085 states have (on average 1.335483870967742) internal successors, (1449), 1089 states have internal predecessors, (1449), 209 states have call successors, (209), 143 states have call predecessors, (209), 142 states have return successors, (206), 205 states have call predecessors, (206), 206 states have call successors, (206) [2021-11-23 02:10:42,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1437 states to 1437 states and 1864 transitions. [2021-11-23 02:10:42,073 INFO L78 Accepts]: Start accepts. Automaton has 1437 states and 1864 transitions. Word has length 50 [2021-11-23 02:10:42,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:10:42,074 INFO L470 AbstractCegarLoop]: Abstraction has 1437 states and 1864 transitions. [2021-11-23 02:10:42,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-23 02:10:42,074 INFO L276 IsEmpty]: Start isEmpty. Operand 1437 states and 1864 transitions. [2021-11-23 02:10:42,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-23 02:10:42,077 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:10:42,077 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:10:42,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:10:42,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:10:42,291 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:10:42,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:10:42,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1557181953, now seen corresponding path program 1 times [2021-11-23 02:10:42,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:10:42,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094338956] [2021-11-23 02:10:42,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:10:42,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:10:42,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:10:42,466 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-23 02:10:42,466 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:10:42,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094338956] [2021-11-23 02:10:42,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094338956] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:10:42,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221151432] [2021-11-23 02:10:42,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:10:42,467 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:10:42,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:10:42,468 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:10:42,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 02:10:42,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:10:42,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:10:42,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:10:42,766 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 02:10:42,766 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:10:42,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221151432] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:10:42,766 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:10:42,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [12] total 13 [2021-11-23 02:10:42,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40860692] [2021-11-23 02:10:42,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:10:42,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:10:42,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:10:42,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:10:42,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-11-23 02:10:42,768 INFO L87 Difference]: Start difference. First operand 1437 states and 1864 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-23 02:10:42,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:10:42,993 INFO L93 Difference]: Finished difference Result 3838 states and 4994 transitions. [2021-11-23 02:10:42,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:10:42,994 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 88 [2021-11-23 02:10:42,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:10:43,014 INFO L225 Difference]: With dead ends: 3838 [2021-11-23 02:10:43,014 INFO L226 Difference]: Without dead ends: 2828 [2021-11-23 02:10:43,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-11-23 02:10:43,019 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 49 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:10:43,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 177 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:10:43,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2828 states. [2021-11-23 02:10:43,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2828 to 2815. [2021-11-23 02:10:43,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2815 states, 2143 states have (on average 1.333177788147457) internal successors, (2857), 2147 states have internal predecessors, (2857), 389 states have call successors, (389), 283 states have call predecessors, (389), 282 states have return successors, (386), 385 states have call predecessors, (386), 386 states have call successors, (386) [2021-11-23 02:10:43,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2815 states to 2815 states and 3632 transitions. [2021-11-23 02:10:43,288 INFO L78 Accepts]: Start accepts. Automaton has 2815 states and 3632 transitions. Word has length 88 [2021-11-23 02:10:43,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:10:43,289 INFO L470 AbstractCegarLoop]: Abstraction has 2815 states and 3632 transitions. [2021-11-23 02:10:43,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-23 02:10:43,289 INFO L276 IsEmpty]: Start isEmpty. Operand 2815 states and 3632 transitions. [2021-11-23 02:10:43,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-23 02:10:43,292 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:10:43,293 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:10:43,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 02:10:43,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:10:43,507 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:10:43,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:10:43,507 INFO L85 PathProgramCache]: Analyzing trace with hash -207634656, now seen corresponding path program 1 times [2021-11-23 02:10:43,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:10:43,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069922372] [2021-11-23 02:10:43,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:10:43,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:10:43,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:10:43,692 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 13 proven. 18 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-23 02:10:43,692 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:10:43,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069922372] [2021-11-23 02:10:43,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069922372] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:10:43,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642142889] [2021-11-23 02:10:43,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:10:43,693 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:10:43,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:10:43,694 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:10:43,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 02:10:43,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:10:43,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:10:43,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:10:43,956 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 02:10:43,956 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:10:43,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642142889] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:10:43,956 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:10:43,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [12] total 13 [2021-11-23 02:10:43,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474377835] [2021-11-23 02:10:43,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:10:43,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:10:43,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:10:43,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:10:43,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-11-23 02:10:43,959 INFO L87 Difference]: Start difference. First operand 2815 states and 3632 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-23 02:10:44,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:10:44,214 INFO L93 Difference]: Finished difference Result 4830 states and 6297 transitions. [2021-11-23 02:10:44,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:10:44,215 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 88 [2021-11-23 02:10:44,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:10:44,234 INFO L225 Difference]: With dead ends: 4830 [2021-11-23 02:10:44,234 INFO L226 Difference]: Without dead ends: 2843 [2021-11-23 02:10:44,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-11-23 02:10:44,241 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 68 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:10:44,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 220 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:10:44,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2843 states. [2021-11-23 02:10:44,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2843 to 2815. [2021-11-23 02:10:44,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2815 states, 2143 states have (on average 1.3201119925338312) internal successors, (2829), 2147 states have internal predecessors, (2829), 389 states have call successors, (389), 283 states have call predecessors, (389), 282 states have return successors, (386), 385 states have call predecessors, (386), 386 states have call successors, (386) [2021-11-23 02:10:44,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2815 states to 2815 states and 3604 transitions. [2021-11-23 02:10:44,494 INFO L78 Accepts]: Start accepts. Automaton has 2815 states and 3604 transitions. Word has length 88 [2021-11-23 02:10:44,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:10:44,496 INFO L470 AbstractCegarLoop]: Abstraction has 2815 states and 3604 transitions. [2021-11-23 02:10:44,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-23 02:10:44,496 INFO L276 IsEmpty]: Start isEmpty. Operand 2815 states and 3604 transitions. [2021-11-23 02:10:44,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-23 02:10:44,501 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:10:44,501 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:10:44,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 02:10:44,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-23 02:10:44,718 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:10:44,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:10:44,719 INFO L85 PathProgramCache]: Analyzing trace with hash 49377354, now seen corresponding path program 1 times [2021-11-23 02:10:44,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:10:44,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281406704] [2021-11-23 02:10:44,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:10:44,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:10:44,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:10:44,786 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-23 02:10:44,786 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:10:44,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281406704] [2021-11-23 02:10:44,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281406704] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:10:44,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126048639] [2021-11-23 02:10:44,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:10:44,787 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:10:44,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:10:44,788 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:10:44,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 02:10:44,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:10:44,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:10:44,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:10:45,058 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-23 02:10:45,059 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:10:45,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126048639] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:10:45,059 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:10:45,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2021-11-23 02:10:45,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717763208] [2021-11-23 02:10:45,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:10:45,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:10:45,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:10:45,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:10:45,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:10:45,064 INFO L87 Difference]: Start difference. First operand 2815 states and 3604 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-23 02:10:45,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:10:45,259 INFO L93 Difference]: Finished difference Result 4816 states and 6236 transitions. [2021-11-23 02:10:45,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:10:45,260 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 88 [2021-11-23 02:10:45,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:10:45,310 INFO L225 Difference]: With dead ends: 4816 [2021-11-23 02:10:45,310 INFO L226 Difference]: Without dead ends: 2815 [2021-11-23 02:10:45,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:10:45,315 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 54 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:10:45,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 82 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:10:45,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2815 states. [2021-11-23 02:10:45,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2815 to 2815. [2021-11-23 02:10:45,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2815 states, 2143 states have (on average 1.3070461969202054) internal successors, (2801), 2147 states have internal predecessors, (2801), 389 states have call successors, (389), 283 states have call predecessors, (389), 282 states have return successors, (386), 385 states have call predecessors, (386), 386 states have call successors, (386) [2021-11-23 02:10:45,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2815 states to 2815 states and 3576 transitions. [2021-11-23 02:10:45,544 INFO L78 Accepts]: Start accepts. Automaton has 2815 states and 3576 transitions. Word has length 88 [2021-11-23 02:10:45,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:10:45,545 INFO L470 AbstractCegarLoop]: Abstraction has 2815 states and 3576 transitions. [2021-11-23 02:10:45,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-23 02:10:45,545 INFO L276 IsEmpty]: Start isEmpty. Operand 2815 states and 3576 transitions. [2021-11-23 02:10:45,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-23 02:10:45,548 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:10:45,548 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:10:45,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 02:10:45,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-23 02:10:45,775 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:10:45,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:10:45,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1858608875, now seen corresponding path program 1 times [2021-11-23 02:10:45,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:10:45,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026966693] [2021-11-23 02:10:45,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:10:45,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:10:45,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:10:45,951 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 13 proven. 18 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-23 02:10:45,952 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:10:45,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026966693] [2021-11-23 02:10:45,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026966693] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:10:45,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964805427] [2021-11-23 02:10:45,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:10:45,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:10:45,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:10:45,954 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:10:45,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 02:10:46,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:10:46,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 02:10:46,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:10:46,308 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 02:10:46,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:10:46,503 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-23 02:10:46,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964805427] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:10:46,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1756627024] [2021-11-23 02:10:46,537 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2021-11-23 02:10:46,537 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:10:46,543 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:10:46,549 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:10:46,550 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:10:52,248 INFO L197 IcfgInterpreter]: Interpreting procedure error with input of size 45 for LOIs [2021-11-23 02:10:52,255 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 103 for LOIs [2021-11-23 02:10:52,289 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 111 for LOIs [2021-11-23 02:10:52,326 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 111 for LOIs [2021-11-23 02:10:52,363 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 38 for LOIs [2021-11-23 02:10:52,372 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 119 for LOIs [2021-11-23 02:10:52,587 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:10:57,388 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '56170#(and (<= 0 ~data_0~0) (= ~i~0 0) (= ~e~0 0) (= ~P_1_ev~0 0) (= ~P_1_st~0 1) (= ~C_1_pr~0 0) (= ~max_loop~0 2) (= ~P_1_i~0 1) (= ~C_1_pc~0 0) (<= 0 ~P_1_pc~0) (= |#NULL.offset| 0) (not (= ~num~0 0)) (<= 0 ~num~0) (= ~C_1_ev~0 0) (<= 0 |#StackHeapBarrier|) (= ~data_1~0 0) (not (= ~num~0 1)) (= ~timer~0 0) (= ~C_1_i~0 1) (= |#NULL.base| 0))' at error location [2021-11-23 02:10:57,389 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:10:57,389 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:10:57,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 4, 5] total 15 [2021-11-23 02:10:57,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611415300] [2021-11-23 02:10:57,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:10:57,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-23 02:10:57,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:10:57,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-23 02:10:57,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=1897, Unknown=0, NotChecked=0, Total=2162 [2021-11-23 02:10:57,392 INFO L87 Difference]: Start difference. First operand 2815 states and 3576 transitions. Second operand has 15 states, 13 states have (on average 8.692307692307692) internal successors, (113), 13 states have internal predecessors, (113), 5 states have call successors, (37), 5 states have call predecessors, (37), 6 states have return successors, (37), 7 states have call predecessors, (37), 5 states have call successors, (37) [2021-11-23 02:11:03,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:11:03,700 INFO L93 Difference]: Finished difference Result 10443 states and 14678 transitions. [2021-11-23 02:11:03,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2021-11-23 02:11:03,701 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 8.692307692307692) internal successors, (113), 13 states have internal predecessors, (113), 5 states have call successors, (37), 5 states have call predecessors, (37), 6 states have return successors, (37), 7 states have call predecessors, (37), 5 states have call successors, (37) Word has length 89 [2021-11-23 02:11:03,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:11:03,758 INFO L225 Difference]: With dead ends: 10443 [2021-11-23 02:11:03,759 INFO L226 Difference]: Without dead ends: 7634 [2021-11-23 02:11:03,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 239 SyntacticMatches, 4 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15364 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=3517, Invalid=32393, Unknown=0, NotChecked=0, Total=35910 [2021-11-23 02:11:03,780 INFO L933 BasicCegarLoop]: 308 mSDtfsCounter, 1361 mSDsluCounter, 2371 mSDsCounter, 0 mSdLazyCounter, 3564 mSolverCounterSat, 887 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1367 SdHoareTripleChecker+Valid, 2257 SdHoareTripleChecker+Invalid, 4451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 887 IncrementalHoareTripleChecker+Valid, 3564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:11:03,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1367 Valid, 2257 Invalid, 4451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [887 Valid, 3564 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-11-23 02:11:03,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7634 states. [2021-11-23 02:11:04,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7634 to 2647. [2021-11-23 02:11:04,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2647 states, 2095 states have (on average 1.3164677804295943) internal successors, (2758), 2097 states have internal predecessors, (2758), 307 states have call successors, (307), 245 states have call predecessors, (307), 244 states have return successors, (304), 304 states have call predecessors, (304), 304 states have call successors, (304) [2021-11-23 02:11:04,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2647 states to 2647 states and 3369 transitions. [2021-11-23 02:11:04,158 INFO L78 Accepts]: Start accepts. Automaton has 2647 states and 3369 transitions. Word has length 89 [2021-11-23 02:11:04,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:11:04,158 INFO L470 AbstractCegarLoop]: Abstraction has 2647 states and 3369 transitions. [2021-11-23 02:11:04,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 8.692307692307692) internal successors, (113), 13 states have internal predecessors, (113), 5 states have call successors, (37), 5 states have call predecessors, (37), 6 states have return successors, (37), 7 states have call predecessors, (37), 5 states have call successors, (37) [2021-11-23 02:11:04,159 INFO L276 IsEmpty]: Start isEmpty. Operand 2647 states and 3369 transitions. [2021-11-23 02:11:04,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-23 02:11:04,161 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:11:04,162 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:11:04,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 02:11:04,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-23 02:11:04,386 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:11:04,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:11:04,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1277764109, now seen corresponding path program 1 times [2021-11-23 02:11:04,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:11:04,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344627994] [2021-11-23 02:11:04,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:11:04,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:11:04,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:11:04,443 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-23 02:11:04,444 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:11:04,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344627994] [2021-11-23 02:11:04,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344627994] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:11:04,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576711813] [2021-11-23 02:11:04,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:11:04,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:11:04,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:11:04,446 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:11:04,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 02:11:04,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:11:04,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:11:04,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:11:04,664 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-23 02:11:04,664 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:11:04,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576711813] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:11:04,664 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:11:04,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2021-11-23 02:11:04,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379437094] [2021-11-23 02:11:04,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:11:04,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:11:04,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:11:04,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:11:04,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:11:04,667 INFO L87 Difference]: Start difference. First operand 2647 states and 3369 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-23 02:11:04,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:11:04,902 INFO L93 Difference]: Finished difference Result 4649 states and 5940 transitions. [2021-11-23 02:11:04,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:11:04,902 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 89 [2021-11-23 02:11:04,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:11:04,919 INFO L225 Difference]: With dead ends: 4649 [2021-11-23 02:11:04,919 INFO L226 Difference]: Without dead ends: 2652 [2021-11-23 02:11:04,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:11:04,925 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 48 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:11:04,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 175 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:11:04,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2652 states. [2021-11-23 02:11:05,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2652 to 2647. [2021-11-23 02:11:05,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2647 states, 2095 states have (on average 1.3121718377088305) internal successors, (2749), 2097 states have internal predecessors, (2749), 307 states have call successors, (307), 245 states have call predecessors, (307), 244 states have return successors, (304), 304 states have call predecessors, (304), 304 states have call successors, (304) [2021-11-23 02:11:05,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2647 states to 2647 states and 3360 transitions. [2021-11-23 02:11:05,154 INFO L78 Accepts]: Start accepts. Automaton has 2647 states and 3360 transitions. Word has length 89 [2021-11-23 02:11:05,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:11:05,154 INFO L470 AbstractCegarLoop]: Abstraction has 2647 states and 3360 transitions. [2021-11-23 02:11:05,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-23 02:11:05,155 INFO L276 IsEmpty]: Start isEmpty. Operand 2647 states and 3360 transitions. [2021-11-23 02:11:05,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-23 02:11:05,158 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:11:05,158 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:11:05,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 02:11:05,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:11:05,376 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:11:05,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:11:05,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1388552914, now seen corresponding path program 1 times [2021-11-23 02:11:05,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:11:05,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816779931] [2021-11-23 02:11:05,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:11:05,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:11:05,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:11:05,429 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-23 02:11:05,430 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:11:05,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816779931] [2021-11-23 02:11:05,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816779931] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:11:05,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538716567] [2021-11-23 02:11:05,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:11:05,431 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:11:05,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:11:05,432 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:11:05,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 02:11:05,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:11:05,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:11:05,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:11:05,669 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 02:11:05,669 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:11:05,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538716567] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:11:05,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:11:05,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-23 02:11:05,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361127016] [2021-11-23 02:11:05,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:11:05,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:11:05,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:11:05,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:11:05,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:11:05,672 INFO L87 Difference]: Start difference. First operand 2647 states and 3360 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-23 02:11:05,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:11:05,989 INFO L93 Difference]: Finished difference Result 5812 states and 7448 transitions. [2021-11-23 02:11:05,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:11:05,990 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 89 [2021-11-23 02:11:05,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:11:06,032 INFO L225 Difference]: With dead ends: 5812 [2021-11-23 02:11:06,032 INFO L226 Difference]: Without dead ends: 3815 [2021-11-23 02:11:06,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:11:06,038 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 59 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:11:06,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 214 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:11:06,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3815 states. [2021-11-23 02:11:06,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3815 to 3663. [2021-11-23 02:11:06,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3663 states, 2860 states have (on average 1.2923076923076924) internal successors, (3696), 2862 states have internal predecessors, (3696), 450 states have call successors, (450), 353 states have call predecessors, (450), 352 states have return successors, (468), 447 states have call predecessors, (468), 447 states have call successors, (468) [2021-11-23 02:11:06,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3663 states to 3663 states and 4614 transitions. [2021-11-23 02:11:06,370 INFO L78 Accepts]: Start accepts. Automaton has 3663 states and 4614 transitions. Word has length 89 [2021-11-23 02:11:06,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:11:06,371 INFO L470 AbstractCegarLoop]: Abstraction has 3663 states and 4614 transitions. [2021-11-23 02:11:06,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-23 02:11:06,372 INFO L276 IsEmpty]: Start isEmpty. Operand 3663 states and 4614 transitions. [2021-11-23 02:11:06,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-23 02:11:06,374 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:11:06,374 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:11:06,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 02:11:06,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-23 02:11:06,599 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:11:06,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:11:06,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1217251954, now seen corresponding path program 1 times [2021-11-23 02:11:06,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:11:06,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840470618] [2021-11-23 02:11:06,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:11:06,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:11:06,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:11:06,651 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-23 02:11:06,651 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:11:06,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840470618] [2021-11-23 02:11:06,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840470618] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:11:06,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779911381] [2021-11-23 02:11:06,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:11:06,652 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:11:06,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:11:06,653 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:11:06,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 02:11:06,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:11:06,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 02:11:06,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:11:06,926 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-23 02:11:06,927 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:11:06,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779911381] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:11:06,927 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:11:06,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 6 [2021-11-23 02:11:06,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764919555] [2021-11-23 02:11:06,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:11:06,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:11:06,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:11:06,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:11:06,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:11:06,930 INFO L87 Difference]: Start difference. First operand 3663 states and 4614 transitions. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 5 states have internal predecessors, (56), 3 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-23 02:11:07,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:11:07,512 INFO L93 Difference]: Finished difference Result 9518 states and 11913 transitions. [2021-11-23 02:11:07,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:11:07,512 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 5 states have internal predecessors, (56), 3 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 90 [2021-11-23 02:11:07,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:11:07,531 INFO L225 Difference]: With dead ends: 9518 [2021-11-23 02:11:07,532 INFO L226 Difference]: Without dead ends: 5877 [2021-11-23 02:11:07,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-23 02:11:07,544 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 204 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:11:07,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 237 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:11:07,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5877 states. [2021-11-23 02:11:08,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5877 to 5873. [2021-11-23 02:11:08,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5873 states, 4471 states have (on average 1.24916126146276) internal successors, (5585), 4473 states have internal predecessors, (5585), 797 states have call successors, (797), 605 states have call predecessors, (797), 604 states have return successors, (836), 794 states have call predecessors, (836), 794 states have call successors, (836) [2021-11-23 02:11:08,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5873 states to 5873 states and 7218 transitions. [2021-11-23 02:11:08,101 INFO L78 Accepts]: Start accepts. Automaton has 5873 states and 7218 transitions. Word has length 90 [2021-11-23 02:11:08,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:11:08,101 INFO L470 AbstractCegarLoop]: Abstraction has 5873 states and 7218 transitions. [2021-11-23 02:11:08,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 5 states have internal predecessors, (56), 3 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-23 02:11:08,102 INFO L276 IsEmpty]: Start isEmpty. Operand 5873 states and 7218 transitions. [2021-11-23 02:11:08,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-23 02:11:08,105 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:11:08,105 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:11:08,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 02:11:08,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-23 02:11:08,319 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:11:08,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:11:08,319 INFO L85 PathProgramCache]: Analyzing trace with hash 772094738, now seen corresponding path program 1 times [2021-11-23 02:11:08,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:11:08,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295215457] [2021-11-23 02:11:08,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:11:08,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:11:08,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:11:08,371 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-23 02:11:08,371 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:11:08,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295215457] [2021-11-23 02:11:08,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295215457] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:11:08,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925063683] [2021-11-23 02:11:08,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:11:08,373 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:11:08,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:11:08,374 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:11:08,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 02:11:08,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:11:08,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 02:11:08,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:11:08,701 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 02:11:08,701 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:11:08,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925063683] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:11:08,702 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:11:08,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 11 [2021-11-23 02:11:08,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556909705] [2021-11-23 02:11:08,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:11:08,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:11:08,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:11:08,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:11:08,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-23 02:11:08,705 INFO L87 Difference]: Start difference. First operand 5873 states and 7218 transitions. Second operand has 7 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-23 02:11:09,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:11:09,425 INFO L93 Difference]: Finished difference Result 12188 states and 15391 transitions. [2021-11-23 02:11:09,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 02:11:09,425 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 92 [2021-11-23 02:11:09,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:11:09,447 INFO L225 Difference]: With dead ends: 12188 [2021-11-23 02:11:09,447 INFO L226 Difference]: Without dead ends: 6337 [2021-11-23 02:11:09,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-11-23 02:11:09,461 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 155 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:11:09,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 478 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:11:09,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6337 states. [2021-11-23 02:11:09,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6337 to 4671. [2021-11-23 02:11:09,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4671 states, 3668 states have (on average 1.262813522355507) internal successors, (4632), 3670 states have internal predecessors, (4632), 550 states have call successors, (550), 453 states have call predecessors, (550), 452 states have return successors, (568), 547 states have call predecessors, (568), 547 states have call successors, (568) [2021-11-23 02:11:09,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4671 states to 4671 states and 5750 transitions. [2021-11-23 02:11:09,960 INFO L78 Accepts]: Start accepts. Automaton has 4671 states and 5750 transitions. Word has length 92 [2021-11-23 02:11:09,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:11:09,961 INFO L470 AbstractCegarLoop]: Abstraction has 4671 states and 5750 transitions. [2021-11-23 02:11:09,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-23 02:11:09,962 INFO L276 IsEmpty]: Start isEmpty. Operand 4671 states and 5750 transitions. [2021-11-23 02:11:09,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-23 02:11:09,964 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:11:09,964 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:11:10,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 02:11:10,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-23 02:11:10,182 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:11:10,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:11:10,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1104760001, now seen corresponding path program 1 times [2021-11-23 02:11:10,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:11:10,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984249528] [2021-11-23 02:11:10,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:11:10,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:11:10,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:11:10,227 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-23 02:11:10,228 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:11:10,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984249528] [2021-11-23 02:11:10,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984249528] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:11:10,228 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:11:10,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:11:10,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696080907] [2021-11-23 02:11:10,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:11:10,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:11:10,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:11:10,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:11:10,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:11:10,231 INFO L87 Difference]: Start difference. First operand 4671 states and 5750 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-23 02:11:10,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:11:10,570 INFO L93 Difference]: Finished difference Result 8554 states and 10535 transitions. [2021-11-23 02:11:10,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:11:10,571 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 93 [2021-11-23 02:11:10,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:11:10,583 INFO L225 Difference]: With dead ends: 8554 [2021-11-23 02:11:10,584 INFO L226 Difference]: Without dead ends: 3905 [2021-11-23 02:11:10,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:11:10,594 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 35 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:11:10,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 154 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:11:10,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3905 states. [2021-11-23 02:11:11,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3905 to 3898. [2021-11-23 02:11:11,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3898 states, 3062 states have (on average 1.2609405617243632) internal successors, (3861), 3064 states have internal predecessors, (3861), 459 states have call successors, (459), 377 states have call predecessors, (459), 376 states have return successors, (477), 456 states have call predecessors, (477), 456 states have call successors, (477) [2021-11-23 02:11:11,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3898 states to 3898 states and 4797 transitions. [2021-11-23 02:11:11,021 INFO L78 Accepts]: Start accepts. Automaton has 3898 states and 4797 transitions. Word has length 93 [2021-11-23 02:11:11,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:11:11,022 INFO L470 AbstractCegarLoop]: Abstraction has 3898 states and 4797 transitions. [2021-11-23 02:11:11,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-23 02:11:11,022 INFO L276 IsEmpty]: Start isEmpty. Operand 3898 states and 4797 transitions. [2021-11-23 02:11:11,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-23 02:11:11,024 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:11:11,024 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:11:11,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-23 02:11:11,025 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:11:11,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:11:11,025 INFO L85 PathProgramCache]: Analyzing trace with hash -872335531, now seen corresponding path program 1 times [2021-11-23 02:11:11,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:11:11,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789171284] [2021-11-23 02:11:11,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:11:11,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:11:11,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:11:11,063 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-23 02:11:11,064 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:11:11,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789171284] [2021-11-23 02:11:11,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789171284] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:11:11,064 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:11:11,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:11:11,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103747966] [2021-11-23 02:11:11,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:11:11,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:11:11,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:11:11,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:11:11,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:11:11,066 INFO L87 Difference]: Start difference. First operand 3898 states and 4797 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-23 02:11:11,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:11:11,432 INFO L93 Difference]: Finished difference Result 6951 states and 8581 transitions. [2021-11-23 02:11:11,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:11:11,433 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 98 [2021-11-23 02:11:11,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:11:11,442 INFO L225 Difference]: With dead ends: 6951 [2021-11-23 02:11:11,443 INFO L226 Difference]: Without dead ends: 3104 [2021-11-23 02:11:11,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:11:11,452 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 158 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:11:11,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 231 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:11:11,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3104 states. [2021-11-23 02:11:11,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3104 to 3014. [2021-11-23 02:11:11,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3014 states, 2391 states have (on average 1.23379339188624) internal successors, (2950), 2393 states have internal predecessors, (2950), 340 states have call successors, (340), 283 states have call predecessors, (340), 282 states have return successors, (337), 337 states have call predecessors, (337), 337 states have call successors, (337) [2021-11-23 02:11:11,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3014 states to 3014 states and 3627 transitions. [2021-11-23 02:11:11,862 INFO L78 Accepts]: Start accepts. Automaton has 3014 states and 3627 transitions. Word has length 98 [2021-11-23 02:11:11,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:11:11,863 INFO L470 AbstractCegarLoop]: Abstraction has 3014 states and 3627 transitions. [2021-11-23 02:11:11,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-23 02:11:11,863 INFO L276 IsEmpty]: Start isEmpty. Operand 3014 states and 3627 transitions. [2021-11-23 02:11:11,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-23 02:11:11,866 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:11:11,866 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:11:11,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-23 02:11:11,867 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:11:11,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:11:11,867 INFO L85 PathProgramCache]: Analyzing trace with hash -2003794542, now seen corresponding path program 1 times [2021-11-23 02:11:11,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:11:11,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815434252] [2021-11-23 02:11:11,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:11:11,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:11:11,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:11:11,928 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-23 02:11:11,929 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:11:11,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815434252] [2021-11-23 02:11:11,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815434252] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:11:11,929 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:11:11,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:11:11,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609350277] [2021-11-23 02:11:11,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:11:11,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:11:11,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:11:11,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:11:11,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:11:11,933 INFO L87 Difference]: Start difference. First operand 3014 states and 3627 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-23 02:11:12,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:11:12,559 INFO L93 Difference]: Finished difference Result 7073 states and 8780 transitions. [2021-11-23 02:11:12,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 02:11:12,560 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 99 [2021-11-23 02:11:12,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:11:12,576 INFO L225 Difference]: With dead ends: 7073 [2021-11-23 02:11:12,576 INFO L226 Difference]: Without dead ends: 4648 [2021-11-23 02:11:12,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-23 02:11:12,584 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 234 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:11:12,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 464 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:11:12,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4648 states. [2021-11-23 02:11:12,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4648 to 3270. [2021-11-23 02:11:12,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3270 states, 2590 states have (on average 1.2250965250965251) internal successors, (3173), 2592 states have internal predecessors, (3173), 371 states have call successors, (371), 309 states have call predecessors, (371), 308 states have return successors, (368), 368 states have call predecessors, (368), 368 states have call successors, (368) [2021-11-23 02:11:12,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3270 states to 3270 states and 3912 transitions. [2021-11-23 02:11:12,962 INFO L78 Accepts]: Start accepts. Automaton has 3270 states and 3912 transitions. Word has length 99 [2021-11-23 02:11:12,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:11:12,963 INFO L470 AbstractCegarLoop]: Abstraction has 3270 states and 3912 transitions. [2021-11-23 02:11:12,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-23 02:11:12,963 INFO L276 IsEmpty]: Start isEmpty. Operand 3270 states and 3912 transitions. [2021-11-23 02:11:12,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-23 02:11:12,965 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:11:12,966 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:11:12,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-23 02:11:12,966 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:11:12,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:11:12,967 INFO L85 PathProgramCache]: Analyzing trace with hash 128718012, now seen corresponding path program 1 times [2021-11-23 02:11:12,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:11:12,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037245708] [2021-11-23 02:11:12,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:11:12,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:11:12,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:11:13,030 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-23 02:11:13,031 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:11:13,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037245708] [2021-11-23 02:11:13,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037245708] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:11:13,031 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:11:13,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:11:13,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161181807] [2021-11-23 02:11:13,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:11:13,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:11:13,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:11:13,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:11:13,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:11:13,033 INFO L87 Difference]: Start difference. First operand 3270 states and 3912 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-23 02:11:13,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:11:13,312 INFO L93 Difference]: Finished difference Result 4942 states and 5953 transitions. [2021-11-23 02:11:13,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:11:13,312 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 102 [2021-11-23 02:11:13,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:11:13,320 INFO L225 Difference]: With dead ends: 4942 [2021-11-23 02:11:13,321 INFO L226 Difference]: Without dead ends: 1723 [2021-11-23 02:11:13,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:11:13,328 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 76 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:11:13,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 207 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:11:13,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1723 states. [2021-11-23 02:11:13,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1723 to 1544. [2021-11-23 02:11:13,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1544 states, 1168 states have (on average 1.202054794520548) internal successors, (1404), 1174 states have internal predecessors, (1404), 213 states have call successors, (213), 158 states have call predecessors, (213), 162 states have return successors, (231), 211 states have call predecessors, (231), 211 states have call successors, (231) [2021-11-23 02:11:13,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 1848 transitions. [2021-11-23 02:11:13,499 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 1848 transitions. Word has length 102 [2021-11-23 02:11:13,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:11:13,499 INFO L470 AbstractCegarLoop]: Abstraction has 1544 states and 1848 transitions. [2021-11-23 02:11:13,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-23 02:11:13,500 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 1848 transitions. [2021-11-23 02:11:13,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-23 02:11:13,504 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:11:13,504 INFO L514 BasicCegarLoop]: trace histogram [10, 6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:11:13,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-23 02:11:13,505 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:11:13,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:11:13,506 INFO L85 PathProgramCache]: Analyzing trace with hash 562120164, now seen corresponding path program 1 times [2021-11-23 02:11:13,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:11:13,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376241390] [2021-11-23 02:11:13,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:11:13,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:11:13,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:11:13,612 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 77 proven. 24 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-11-23 02:11:13,612 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:11:13,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376241390] [2021-11-23 02:11:13,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376241390] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:11:13,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844209131] [2021-11-23 02:11:13,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:11:13,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:11:13,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:11:13,614 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:11:13,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 02:11:13,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:11:13,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-23 02:11:13,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:11:14,031 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 180 proven. 13 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-23 02:11:14,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:11:14,410 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 91 proven. 11 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-11-23 02:11:14,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844209131] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:11:14,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [367501311] [2021-11-23 02:11:14,420 INFO L159 IcfgInterpreter]: Started Sifa with 59 locations of interest [2021-11-23 02:11:14,420 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:11:14,421 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:11:14,421 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:11:14,422 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:11:19,460 INFO L197 IcfgInterpreter]: Interpreting procedure error with input of size 45 for LOIs [2021-11-23 02:11:19,465 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 105 for LOIs [2021-11-23 02:11:19,535 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 111 for LOIs [2021-11-23 02:11:19,561 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 111 for LOIs [2021-11-23 02:11:19,585 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 38 for LOIs [2021-11-23 02:11:19,590 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 119 for LOIs [2021-11-23 02:11:19,763 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:11:26,441 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '204237#(and (<= 0 ~data_0~0) (= ~e~0 0) (<= 0 ~i~0) (= ~P_1_ev~0 0) (= ~P_1_st~0 1) (= ~C_1_pr~0 0) (= ~max_loop~0 2) (= ~P_1_i~0 1) (<= 0 ~data_1~0) (<= 0 ~P_1_pc~0) (= |#NULL.offset| 0) (<= 0 ~C_1_pc~0) (<= 0 ~timer~0) (not (= ~num~0 0)) (<= 0 ~num~0) (= ~C_1_ev~0 0) (<= 0 |#StackHeapBarrier|) (not (= ~num~0 1)) (< ~i~0 ~max_loop~0) (= ~C_1_i~0 1) (= |#NULL.base| 0))' at error location [2021-11-23 02:11:26,442 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:11:26,442 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:11:26,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 11 [2021-11-23 02:11:26,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824686089] [2021-11-23 02:11:26,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:11:26,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-23 02:11:26,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:11:26,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-23 02:11:26,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=2343, Unknown=0, NotChecked=0, Total=2652 [2021-11-23 02:11:26,445 INFO L87 Difference]: Start difference. First operand 1544 states and 1848 transitions. Second operand has 11 states, 11 states have (on average 14.454545454545455) internal successors, (159), 11 states have internal predecessors, (159), 7 states have call successors, (45), 7 states have call predecessors, (45), 7 states have return successors, (44), 7 states have call predecessors, (44), 7 states have call successors, (44) [2021-11-23 02:11:27,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:11:27,215 INFO L93 Difference]: Finished difference Result 4651 states and 5711 transitions. [2021-11-23 02:11:27,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-23 02:11:27,216 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 14.454545454545455) internal successors, (159), 11 states have internal predecessors, (159), 7 states have call successors, (45), 7 states have call predecessors, (45), 7 states have return successors, (44), 7 states have call predecessors, (44), 7 states have call successors, (44) Word has length 158 [2021-11-23 02:11:27,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:11:27,227 INFO L225 Difference]: With dead ends: 4651 [2021-11-23 02:11:27,228 INFO L226 Difference]: Without dead ends: 3049 [2021-11-23 02:11:27,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 439 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1685 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=453, Invalid=4103, Unknown=0, NotChecked=0, Total=4556 [2021-11-23 02:11:27,235 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 462 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:11:27,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [466 Valid, 622 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 02:11:27,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3049 states. [2021-11-23 02:11:27,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3049 to 1730. [2021-11-23 02:11:27,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1730 states, 1267 states have (on average 1.1767955801104972) internal successors, (1491), 1296 states have internal predecessors, (1491), 259 states have call successors, (259), 176 states have call predecessors, (259), 203 states have return successors, (389), 257 states have call predecessors, (389), 257 states have call successors, (389) [2021-11-23 02:11:27,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1730 states to 1730 states and 2139 transitions. [2021-11-23 02:11:27,452 INFO L78 Accepts]: Start accepts. Automaton has 1730 states and 2139 transitions. Word has length 158 [2021-11-23 02:11:27,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:11:27,453 INFO L470 AbstractCegarLoop]: Abstraction has 1730 states and 2139 transitions. [2021-11-23 02:11:27,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.454545454545455) internal successors, (159), 11 states have internal predecessors, (159), 7 states have call successors, (45), 7 states have call predecessors, (45), 7 states have return successors, (44), 7 states have call predecessors, (44), 7 states have call successors, (44) [2021-11-23 02:11:27,454 INFO L276 IsEmpty]: Start isEmpty. Operand 1730 states and 2139 transitions. [2021-11-23 02:11:27,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-23 02:11:27,459 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:11:27,460 INFO L514 BasicCegarLoop]: trace histogram [10, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:11:27,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 02:11:27,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-23 02:11:27,675 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:11:27,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:11:27,675 INFO L85 PathProgramCache]: Analyzing trace with hash 733252937, now seen corresponding path program 1 times [2021-11-23 02:11:27,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:11:27,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661227460] [2021-11-23 02:11:27,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:11:27,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:11:27,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:11:27,746 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 84 proven. 34 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-23 02:11:27,746 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:11:27,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661227460] [2021-11-23 02:11:27,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661227460] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:11:27,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479318605] [2021-11-23 02:11:27,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:11:27,747 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:11:27,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:11:27,748 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:11:27,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 02:11:27,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:11:27,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 02:11:27,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:11:28,106 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 202 proven. 3 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-23 02:11:28,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:11:28,353 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-11-23 02:11:28,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479318605] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 02:11:28,354 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:11:28,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 7 [2021-11-23 02:11:28,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914375029] [2021-11-23 02:11:28,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:11:28,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:11:28,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:11:28,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:11:28,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:11:28,355 INFO L87 Difference]: Start difference. First operand 1730 states and 2139 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 3 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-23 02:11:28,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:11:28,579 INFO L93 Difference]: Finished difference Result 3360 states and 4190 transitions. [2021-11-23 02:11:28,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:11:28,581 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 3 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 169 [2021-11-23 02:11:28,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:11:28,586 INFO L225 Difference]: With dead ends: 3360 [2021-11-23 02:11:28,586 INFO L226 Difference]: Without dead ends: 1795 [2021-11-23 02:11:28,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:11:28,592 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 75 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:11:28,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 150 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:11:28,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1795 states. [2021-11-23 02:11:28,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1795 to 1693. [2021-11-23 02:11:28,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1693 states, 1257 states have (on average 1.1551312649164678) internal successors, (1452), 1273 states have internal predecessors, (1452), 238 states have call successors, (238), 183 states have call predecessors, (238), 197 states have return successors, (266), 236 states have call predecessors, (266), 236 states have call successors, (266) [2021-11-23 02:11:28,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1693 states to 1693 states and 1956 transitions. [2021-11-23 02:11:28,781 INFO L78 Accepts]: Start accepts. Automaton has 1693 states and 1956 transitions. Word has length 169 [2021-11-23 02:11:28,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:11:28,781 INFO L470 AbstractCegarLoop]: Abstraction has 1693 states and 1956 transitions. [2021-11-23 02:11:28,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 3 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-23 02:11:28,782 INFO L276 IsEmpty]: Start isEmpty. Operand 1693 states and 1956 transitions. [2021-11-23 02:11:28,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-23 02:11:28,786 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:11:28,786 INFO L514 BasicCegarLoop]: trace histogram [10, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:11:28,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-23 02:11:29,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-23 02:11:29,015 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:11:29,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:11:29,015 INFO L85 PathProgramCache]: Analyzing trace with hash 379124548, now seen corresponding path program 1 times [2021-11-23 02:11:29,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:11:29,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112017996] [2021-11-23 02:11:29,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:11:29,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:11:29,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 02:11:29,034 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-23 02:11:29,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 02:11:29,160 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-23 02:11:29,160 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-23 02:11:29,162 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location errorErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-23 02:11:29,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-23 02:11:29,167 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:11:29,172 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 02:11:29,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 02:11:29 BoogieIcfgContainer [2021-11-23 02:11:29,396 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 02:11:29,397 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 02:11:29,397 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 02:11:29,398 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 02:11:29,398 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:10:36" (3/4) ... [2021-11-23 02:11:29,400 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-23 02:11:29,543 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/witness.graphml [2021-11-23 02:11:29,543 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 02:11:29,544 INFO L158 Benchmark]: Toolchain (without parser) took 54150.89ms. Allocated memory was 107.0MB in the beginning and 979.4MB in the end (delta: 872.4MB). Free memory was 74.3MB in the beginning and 733.8MB in the end (delta: -659.6MB). Peak memory consumption was 212.3MB. Max. memory is 16.1GB. [2021-11-23 02:11:29,544 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 107.0MB. Free memory is still 61.4MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 02:11:29,544 INFO L158 Benchmark]: CACSL2BoogieTranslator took 413.20ms. Allocated memory is still 107.0MB. Free memory was 74.1MB in the beginning and 79.7MB in the end (delta: -5.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 02:11:29,545 INFO L158 Benchmark]: Boogie Procedure Inliner took 54.38ms. Allocated memory is still 107.0MB. Free memory was 79.7MB in the beginning and 77.6MB in the end (delta: 2.1MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 02:11:29,545 INFO L158 Benchmark]: Boogie Preprocessor took 36.05ms. Allocated memory is still 107.0MB. Free memory was 77.6MB in the beginning and 75.9MB in the end (delta: 1.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-23 02:11:29,545 INFO L158 Benchmark]: RCFGBuilder took 795.44ms. Allocated memory is still 107.0MB. Free memory was 75.9MB in the beginning and 55.3MB in the end (delta: 20.6MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2021-11-23 02:11:29,546 INFO L158 Benchmark]: TraceAbstraction took 52697.68ms. Allocated memory was 107.0MB in the beginning and 979.4MB in the end (delta: 872.4MB). Free memory was 54.6MB in the beginning and 754.8MB in the end (delta: -700.1MB). Peak memory consumption was 175.1MB. Max. memory is 16.1GB. [2021-11-23 02:11:29,546 INFO L158 Benchmark]: Witness Printer took 145.79ms. Allocated memory is still 979.4MB. Free memory was 754.8MB in the beginning and 733.8MB in the end (delta: 20.9MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2021-11-23 02:11:29,548 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 107.0MB. Free memory is still 61.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 413.20ms. Allocated memory is still 107.0MB. Free memory was 74.1MB in the beginning and 79.7MB in the end (delta: -5.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 54.38ms. Allocated memory is still 107.0MB. Free memory was 79.7MB in the beginning and 77.6MB in the end (delta: 2.1MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 36.05ms. Allocated memory is still 107.0MB. Free memory was 77.6MB in the beginning and 75.9MB in the end (delta: 1.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 795.44ms. Allocated memory is still 107.0MB. Free memory was 75.9MB in the beginning and 55.3MB in the end (delta: 20.6MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * TraceAbstraction took 52697.68ms. Allocated memory was 107.0MB in the beginning and 979.4MB in the end (delta: 872.4MB). Free memory was 54.6MB in the beginning and 754.8MB in the end (delta: -700.1MB). Peak memory consumption was 175.1MB. Max. memory is 16.1GB. * Witness Printer took 145.79ms. Allocated memory is still 979.4MB. Free memory was 754.8MB in the beginning and 733.8MB in the end (delta: 20.9MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 19]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L25] int max_loop ; [L26] int num ; [L27] int i ; [L28] int e ; [L29] int timer ; [L30] char data_0 ; [L31] char data_1 ; [L74] int P_1_pc; [L75] int P_1_st ; [L76] int P_1_i ; [L77] int P_1_ev ; [L132] int C_1_pc ; [L133] int C_1_st ; [L134] int C_1_i ; [L135] int C_1_ev ; [L136] int C_1_pr ; [L500] int count ; [L501] int __retres2 ; [L505] num = 0 [L506] i = 0 [L507] max_loop = 2 [L509] timer = 0 [L510] P_1_pc = 0 [L511] C_1_pc = 0 [L513] count = 0 [L514] CALL init_model() [L493] P_1_i = 1 [L494] C_1_i = 1 [L514] RET init_model() [L515] CALL start_simulation() [L431] int kernel_st ; [L432] int tmp ; [L433] int tmp___0 ; [L437] kernel_st = 0 VAL [C_1_ev=0, C_1_i=1, C_1_pc=0, C_1_pr=0, C_1_st=0, data_0=0, data_1=0, e=0, i=0, kernel_st=0, max_loop=2, num=0, P_1_ev=0, P_1_i=1, P_1_pc=0, P_1_st=0, timer=0] [L438] FCALL update_channels() VAL [C_1_ev=0, C_1_i=1, C_1_pc=0, C_1_pr=0, C_1_st=0, data_0=0, data_1=0, e=0, i=0, kernel_st=0, max_loop=2, num=0, P_1_ev=0, P_1_i=1, P_1_pc=0, P_1_st=0, timer=0] [L439] CALL init_threads() [L236] COND TRUE (int )P_1_i == 1 [L237] P_1_st = 0 [L241] COND TRUE (int )C_1_i == 1 [L242] C_1_st = 0 [L439] RET init_threads() [L440] FCALL fire_delta_events() VAL [C_1_ev=0, C_1_i=1, C_1_pc=0, C_1_pr=0, C_1_st=0, data_0=0, data_1=0, e=0, i=0, kernel_st=0, max_loop=2, num=0, P_1_ev=0, P_1_i=1, P_1_pc=0, P_1_st=0, timer=0] [L441] CALL activate_threads() VAL [\old(C_1_st)=0, \old(P_1_st)=0, C_1_ev=0, C_1_i=1, C_1_pc=0, C_1_pr=0, C_1_st=0, data_0=0, data_1=0, e=0, i=0, max_loop=2, num=0, P_1_ev=0, P_1_i=1, P_1_pc=0, P_1_st=0, timer=0] [L375] int tmp ; [L376] int tmp___0 ; [L377] int tmp___1 ; [L381] CALL, EXPR is_P_1_triggered() [L114] int __retres1 ; VAL [\old(C_1_st)=0, \old(P_1_st)=0, C_1_ev=0, C_1_i=1, C_1_pc=0, C_1_pr=0, C_1_st=0, data_0=0, data_1=0, e=0, i=0, max_loop=2, num=0, P_1_ev=0, P_1_i=1, P_1_pc=0, P_1_st=0, timer=0] [L117] COND FALSE !((int )P_1_pc == 1) VAL [\old(C_1_st)=0, \old(P_1_st)=0, C_1_ev=0, C_1_i=1, C_1_pc=0, C_1_pr=0, C_1_st=0, data_0=0, data_1=0, e=0, i=0, max_loop=2, num=0, P_1_ev=0, P_1_i=1, P_1_pc=0, P_1_st=0, timer=0] [L127] __retres1 = 0 VAL [\old(C_1_st)=0, \old(P_1_st)=0, __retres1=0, C_1_ev=0, C_1_i=1, C_1_pc=0, C_1_pr=0, C_1_st=0, data_0=0, data_1=0, e=0, i=0, max_loop=2, num=0, P_1_ev=0, P_1_i=1, P_1_pc=0, P_1_st=0, timer=0] [L129] return (__retres1); [L381] RET, EXPR is_P_1_triggered() [L381] tmp = is_P_1_triggered() [L383] COND FALSE !(\read(tmp)) [L389] CALL, EXPR is_C_1_triggered() [L196] int __retres1 ; VAL [\old(C_1_st)=0, \old(P_1_st)=0, C_1_ev=0, C_1_i=1, C_1_pc=0, C_1_pr=0, C_1_st=0, data_0=0, data_1=0, e=0, i=0, max_loop=2, num=0, P_1_ev=0, P_1_i=1, P_1_pc=0, P_1_st=0, timer=0] [L199] COND FALSE !((int )C_1_pc == 1) VAL [\old(C_1_st)=0, \old(P_1_st)=0, C_1_ev=0, C_1_i=1, C_1_pc=0, C_1_pr=0, C_1_st=0, data_0=0, data_1=0, e=0, i=0, max_loop=2, num=0, P_1_ev=0, P_1_i=1, P_1_pc=0, P_1_st=0, timer=0] [L209] COND FALSE !((int )C_1_pc == 2) VAL [\old(C_1_st)=0, \old(P_1_st)=0, C_1_ev=0, C_1_i=1, C_1_pc=0, C_1_pr=0, C_1_st=0, data_0=0, data_1=0, e=0, i=0, max_loop=2, num=0, P_1_ev=0, P_1_i=1, P_1_pc=0, P_1_st=0, timer=0] [L219] __retres1 = 0 VAL [\old(C_1_st)=0, \old(P_1_st)=0, __retres1=0, C_1_ev=0, C_1_i=1, C_1_pc=0, C_1_pr=0, C_1_st=0, data_0=0, data_1=0, e=0, i=0, max_loop=2, num=0, P_1_ev=0, P_1_i=1, P_1_pc=0, P_1_st=0, timer=0] [L221] return (__retres1); [L389] RET, EXPR is_C_1_triggered() [L389] tmp___1 = is_C_1_triggered() [L391] COND FALSE !(\read(tmp___1)) [L441] RET activate_threads() VAL [C_1_ev=0, C_1_i=1, C_1_pc=0, C_1_pr=0, C_1_st=0, data_0=0, data_1=0, e=0, i=0, kernel_st=0, max_loop=2, num=0, P_1_ev=0, P_1_i=1, P_1_pc=0, P_1_st=0, timer=0] [L442] FCALL reset_delta_events() VAL [C_1_ev=0, C_1_i=1, C_1_pc=0, C_1_pr=0, C_1_st=0, data_0=0, data_1=0, e=0, i=0, kernel_st=0, max_loop=2, num=0, P_1_ev=0, P_1_i=1, P_1_pc=0, P_1_st=0, timer=0] [L445] COND TRUE 1 [L448] kernel_st = 1 [L449] CALL eval() [L272] int tmp ; [L273] int tmp___0 ; [L274] int tmp___1 ; [L275] int tmp___2 ; VAL [C_1_ev=0, C_1_i=1, C_1_pc=0, C_1_pr=0, C_1_st=0, data_0=0, data_1=0, e=0, i=0, max_loop=2, num=0, P_1_ev=0, P_1_i=1, P_1_pc=0, P_1_st=0, timer=0] [L279] COND TRUE 1 VAL [C_1_ev=0, C_1_i=1, C_1_pc=0, C_1_pr=0, C_1_st=0, data_0=0, data_1=0, e=0, i=0, max_loop=2, num=0, P_1_ev=0, P_1_i=1, P_1_pc=0, P_1_st=0, timer=0] [L282] CALL, EXPR exists_runnable_thread() VAL [C_1_ev=0, C_1_i=1, C_1_pc=0, C_1_pr=0, C_1_st=0, data_0=0, data_1=0, e=0, i=0, max_loop=2, num=0, P_1_ev=0, P_1_i=1, P_1_pc=0, P_1_st=0, timer=0] [L251] int __retres1 ; [L254] COND TRUE (int )P_1_st == 0 [L255] __retres1 = 1 [L268] return (__retres1); [L282] RET, EXPR exists_runnable_thread() VAL [C_1_ev=0, C_1_i=1, C_1_pc=0, C_1_pr=0, C_1_st=0, data_0=0, data_1=0, e=0, exists_runnable_thread()=1, i=0, max_loop=2, num=0, P_1_ev=0, P_1_i=1, P_1_pc=0, P_1_st=0, timer=0] [L282] tmp___2 = exists_runnable_thread() [L284] COND TRUE \read(tmp___2) VAL [C_1_ev=0, C_1_i=1, C_1_pc=0, C_1_pr=0, C_1_st=0, data_0=0, data_1=0, e=0, i=0, max_loop=2, num=0, P_1_ev=0, P_1_i=1, P_1_pc=0, P_1_st=0, timer=0, tmp___2=1] [L289] COND TRUE (int )P_1_st == 0 [L291] tmp = __VERIFIER_nondet_int() [L293] COND FALSE !(\read(tmp)) VAL [C_1_ev=0, C_1_i=1, C_1_pc=0, C_1_pr=0, C_1_st=0, data_0=0, data_1=0, e=0, i=0, max_loop=2, num=0, P_1_ev=0, P_1_i=1, P_1_pc=0, P_1_st=0, timer=0, tmp=0, tmp___2=1] [L304] COND TRUE (int )C_1_st == 0 [L306] tmp___1 = __VERIFIER_nondet_int() [L308] COND TRUE \read(tmp___1) [L310] C_1_st = 1 [L311] CALL C_1() [L138] char c ; VAL [C_1_ev=0, C_1_i=1, C_1_pc=0, C_1_pr=0, C_1_st=1, data_0=0, data_1=0, e=0, i=0, max_loop=2, num=0, P_1_ev=0, P_1_i=1, P_1_pc=0, P_1_st=0, timer=0] [L141] COND TRUE (int )C_1_pc == 0 VAL [C_1_ev=0, C_1_i=1, C_1_pc=0, C_1_pr=0, C_1_st=1, data_0=0, data_1=0, e=0, i=0, max_loop=2, num=0, P_1_ev=0, P_1_i=1, P_1_pc=0, P_1_st=0, timer=0] [L156] COND TRUE i < max_loop VAL [C_1_ev=0, C_1_i=1, C_1_pc=0, C_1_pr=0, C_1_st=1, data_0=0, data_1=0, e=0, i=0, max_loop=2, num=0, P_1_ev=0, P_1_i=1, P_1_pc=0, P_1_st=0, timer=0] [L158] COND TRUE num == 0 [L159] timer = 1 [L160] i += 1 [L161] C_1_pc = 1 [L162] C_1_st = 2 VAL [C_1_ev=0, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=0, data_1=0, e=0, i=1, max_loop=2, num=0, P_1_ev=0, P_1_i=1, P_1_pc=0, P_1_st=0, timer=1] [L311] RET C_1() [L279] COND TRUE 1 VAL [C_1_ev=0, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=0, data_1=0, e=0, i=1, max_loop=2, num=0, P_1_ev=0, P_1_i=1, P_1_pc=0, P_1_st=0, timer=1, tmp=0, tmp___1=1, tmp___2=1] [L282] CALL, EXPR exists_runnable_thread() VAL [C_1_ev=0, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=0, data_1=0, e=0, i=1, max_loop=2, num=0, P_1_ev=0, P_1_i=1, P_1_pc=0, P_1_st=0, timer=1] [L251] int __retres1 ; [L254] COND TRUE (int )P_1_st == 0 [L255] __retres1 = 1 [L268] return (__retres1); [L282] RET, EXPR exists_runnable_thread() VAL [C_1_ev=0, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=0, data_1=0, e=0, exists_runnable_thread()=1, i=1, max_loop=2, num=0, P_1_ev=0, P_1_i=1, P_1_pc=0, P_1_st=0, timer=1, tmp=0, tmp___1=1, tmp___2=1] [L282] tmp___2 = exists_runnable_thread() [L284] COND TRUE \read(tmp___2) VAL [C_1_ev=0, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=0, data_1=0, e=0, i=1, max_loop=2, num=0, P_1_ev=0, P_1_i=1, P_1_pc=0, P_1_st=0, timer=1, tmp=0, tmp___1=1, tmp___2=1] [L289] COND TRUE (int )P_1_st == 0 [L291] tmp = __VERIFIER_nondet_int() [L293] COND TRUE \read(tmp) [L295] P_1_st = 1 [L296] CALL P_1() [L82] COND TRUE (int )P_1_pc == 0 VAL [C_1_ev=0, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=0, data_1=0, e=0, i=1, max_loop=2, num=0, P_1_ev=0, P_1_i=1, P_1_pc=0, P_1_st=1, timer=1] [L93] COND TRUE i < max_loop [L96] CALL write_data(num, 'A') [L59] COND TRUE i___0 == 0 [L60] data_0 = c VAL [\old(c)=65, \old(i___0)=0, c=65, C_1_ev=0, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=0, e=0, i=1, i___0=0, max_loop=2, num=0, P_1_ev=0, P_1_i=1, P_1_pc=0, P_1_st=1, timer=1] [L96] RET write_data(num, 'A') [L97] num += 1 [L98] P_1_pc = 1 [L99] P_1_st = 2 VAL [C_1_ev=0, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=0, e=0, i=1, max_loop=2, num=1, P_1_ev=0, P_1_i=1, P_1_pc=1, P_1_st=2, timer=1] [L296] RET P_1() [L304] COND FALSE !((int )C_1_st == 0) VAL [C_1_ev=0, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=0, e=0, i=1, max_loop=2, num=1, P_1_ev=0, P_1_i=1, P_1_pc=1, P_1_st=2, timer=1, tmp=-1, tmp___1=1, tmp___2=1] [L279] COND TRUE 1 VAL [C_1_ev=0, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=0, e=0, i=1, max_loop=2, num=1, P_1_ev=0, P_1_i=1, P_1_pc=1, P_1_st=2, timer=1, tmp=-1, tmp___1=1, tmp___2=1] [L282] CALL, EXPR exists_runnable_thread() VAL [C_1_ev=0, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=0, e=0, i=1, max_loop=2, num=1, P_1_ev=0, P_1_i=1, P_1_pc=1, P_1_st=2, timer=1] [L251] int __retres1 ; [L254] COND FALSE !((int )P_1_st == 0) [L258] COND FALSE !((int )C_1_st == 0) [L266] __retres1 = 0 [L268] return (__retres1); [L282] RET, EXPR exists_runnable_thread() VAL [C_1_ev=0, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=0, e=0, exists_runnable_thread()=0, i=1, max_loop=2, num=1, P_1_ev=0, P_1_i=1, P_1_pc=1, P_1_st=2, timer=1, tmp=-1, tmp___1=1, tmp___2=1] [L282] tmp___2 = exists_runnable_thread() [L284] COND FALSE !(\read(tmp___2)) VAL [C_1_ev=0, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=0, e=0, i=1, max_loop=2, num=1, P_1_ev=0, P_1_i=1, P_1_pc=1, P_1_st=2, timer=1, tmp=-1, tmp___1=1, tmp___2=0] [L449] RET eval() [L452] kernel_st = 2 VAL [C_1_ev=0, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=0, e=0, i=1, kernel_st=2, max_loop=2, num=1, P_1_ev=0, P_1_i=1, P_1_pc=1, P_1_st=2, timer=1] [L453] FCALL update_channels() VAL [C_1_ev=0, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=0, e=0, i=1, kernel_st=2, max_loop=2, num=1, P_1_ev=0, P_1_i=1, P_1_pc=1, P_1_st=2, timer=1] [L456] kernel_st = 3 VAL [C_1_ev=0, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=0, e=0, i=1, kernel_st=3, max_loop=2, num=1, P_1_ev=0, P_1_i=1, P_1_pc=1, P_1_st=2, timer=1] [L457] FCALL fire_delta_events() VAL [C_1_ev=0, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=0, e=0, i=1, kernel_st=3, max_loop=2, num=1, P_1_ev=0, P_1_i=1, P_1_pc=1, P_1_st=2, timer=1] [L458] CALL activate_threads() VAL [\old(C_1_st)=2, \old(P_1_st)=2, C_1_ev=0, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=0, e=0, i=1, max_loop=2, num=1, P_1_ev=0, P_1_i=1, P_1_pc=1, P_1_st=2, timer=1] [L375] int tmp ; [L376] int tmp___0 ; [L377] int tmp___1 ; [L381] CALL, EXPR is_P_1_triggered() [L114] int __retres1 ; VAL [\old(C_1_st)=2, \old(P_1_st)=2, C_1_ev=0, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=0, e=0, i=1, max_loop=2, num=1, P_1_ev=0, P_1_i=1, P_1_pc=1, P_1_st=2, timer=1] [L117] COND TRUE (int )P_1_pc == 1 VAL [\old(C_1_st)=2, \old(P_1_st)=2, C_1_ev=0, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=0, e=0, i=1, max_loop=2, num=1, P_1_ev=0, P_1_i=1, P_1_pc=1, P_1_st=2, timer=1] [L118] COND FALSE !((int )P_1_ev == 1) VAL [\old(C_1_st)=2, \old(P_1_st)=2, C_1_ev=0, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=0, e=0, i=1, max_loop=2, num=1, P_1_ev=0, P_1_i=1, P_1_pc=1, P_1_st=2, timer=1] [L127] __retres1 = 0 VAL [\old(C_1_st)=2, \old(P_1_st)=2, __retres1=0, C_1_ev=0, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=0, e=0, i=1, max_loop=2, num=1, P_1_ev=0, P_1_i=1, P_1_pc=1, P_1_st=2, timer=1] [L129] return (__retres1); [L381] RET, EXPR is_P_1_triggered() [L381] tmp = is_P_1_triggered() [L383] COND FALSE !(\read(tmp)) [L389] CALL, EXPR is_C_1_triggered() [L196] int __retres1 ; VAL [\old(C_1_st)=2, \old(P_1_st)=2, C_1_ev=0, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=0, e=0, i=1, max_loop=2, num=1, P_1_ev=0, P_1_i=1, P_1_pc=1, P_1_st=2, timer=1] [L199] COND TRUE (int )C_1_pc == 1 VAL [\old(C_1_st)=2, \old(P_1_st)=2, C_1_ev=0, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=0, e=0, i=1, max_loop=2, num=1, P_1_ev=0, P_1_i=1, P_1_pc=1, P_1_st=2, timer=1] [L200] COND FALSE !((int )e == 1) VAL [\old(C_1_st)=2, \old(P_1_st)=2, C_1_ev=0, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=0, e=0, i=1, max_loop=2, num=1, P_1_ev=0, P_1_i=1, P_1_pc=1, P_1_st=2, timer=1] [L209] COND FALSE !((int )C_1_pc == 2) VAL [\old(C_1_st)=2, \old(P_1_st)=2, C_1_ev=0, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=0, e=0, i=1, max_loop=2, num=1, P_1_ev=0, P_1_i=1, P_1_pc=1, P_1_st=2, timer=1] [L219] __retres1 = 0 VAL [\old(C_1_st)=2, \old(P_1_st)=2, __retres1=0, C_1_ev=0, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=0, e=0, i=1, max_loop=2, num=1, P_1_ev=0, P_1_i=1, P_1_pc=1, P_1_st=2, timer=1] [L221] return (__retres1); [L389] RET, EXPR is_C_1_triggered() [L389] tmp___1 = is_C_1_triggered() [L391] COND FALSE !(\read(tmp___1)) [L458] RET activate_threads() VAL [C_1_ev=0, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=0, e=0, i=1, kernel_st=3, max_loop=2, num=1, P_1_ev=0, P_1_i=1, P_1_pc=1, P_1_st=2, timer=1] [L459] FCALL reset_delta_events() VAL [C_1_ev=0, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=0, e=0, i=1, kernel_st=3, max_loop=2, num=1, P_1_ev=0, P_1_i=1, P_1_pc=1, P_1_st=2, timer=1] [L462] CALL, EXPR exists_runnable_thread() VAL [C_1_ev=0, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=0, e=0, i=1, max_loop=2, num=1, P_1_ev=0, P_1_i=1, P_1_pc=1, P_1_st=2, timer=1] [L251] int __retres1 ; [L254] COND FALSE !((int )P_1_st == 0) [L258] COND FALSE !((int )C_1_st == 0) [L266] __retres1 = 0 [L268] return (__retres1); [L462] RET, EXPR exists_runnable_thread() VAL [C_1_ev=0, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=0, e=0, exists_runnable_thread()=0, i=1, kernel_st=3, max_loop=2, num=1, P_1_ev=0, P_1_i=1, P_1_pc=1, P_1_st=2, timer=1] [L462] tmp = exists_runnable_thread() [L464] COND TRUE tmp == 0 [L466] kernel_st = 4 [L467] CALL fire_time_events() [L346] C_1_ev = 1 [L348] P_1_ev = 1 [L467] RET fire_time_events() [L468] CALL activate_threads() VAL [\old(C_1_st)=2, \old(P_1_st)=2, C_1_ev=1, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=0, e=0, i=1, max_loop=2, num=1, P_1_ev=1, P_1_i=1, P_1_pc=1, P_1_st=2, timer=1] [L375] int tmp ; [L376] int tmp___0 ; [L377] int tmp___1 ; [L381] CALL, EXPR is_P_1_triggered() [L114] int __retres1 ; VAL [\old(C_1_st)=2, \old(P_1_st)=2, C_1_ev=1, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=0, e=0, i=1, max_loop=2, num=1, P_1_ev=1, P_1_i=1, P_1_pc=1, P_1_st=2, timer=1] [L117] COND TRUE (int )P_1_pc == 1 VAL [\old(C_1_st)=2, \old(P_1_st)=2, C_1_ev=1, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=0, e=0, i=1, max_loop=2, num=1, P_1_ev=1, P_1_i=1, P_1_pc=1, P_1_st=2, timer=1] [L118] COND TRUE (int )P_1_ev == 1 [L119] __retres1 = 1 VAL [\old(C_1_st)=2, \old(P_1_st)=2, __retres1=1, C_1_ev=1, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=0, e=0, i=1, max_loop=2, num=1, P_1_ev=1, P_1_i=1, P_1_pc=1, P_1_st=2, timer=1] [L129] return (__retres1); [L381] RET, EXPR is_P_1_triggered() [L381] tmp = is_P_1_triggered() [L383] COND TRUE \read(tmp) [L384] P_1_st = 0 [L389] CALL, EXPR is_C_1_triggered() [L196] int __retres1 ; VAL [\old(C_1_st)=2, \old(P_1_st)=2, C_1_ev=1, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=0, e=0, i=1, max_loop=2, num=1, P_1_ev=1, P_1_i=1, P_1_pc=1, P_1_st=0, timer=1] [L199] COND TRUE (int )C_1_pc == 1 VAL [\old(C_1_st)=2, \old(P_1_st)=2, C_1_ev=1, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=0, e=0, i=1, max_loop=2, num=1, P_1_ev=1, P_1_i=1, P_1_pc=1, P_1_st=0, timer=1] [L200] COND FALSE !((int )e == 1) VAL [\old(C_1_st)=2, \old(P_1_st)=2, C_1_ev=1, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=0, e=0, i=1, max_loop=2, num=1, P_1_ev=1, P_1_i=1, P_1_pc=1, P_1_st=0, timer=1] [L209] COND FALSE !((int )C_1_pc == 2) VAL [\old(C_1_st)=2, \old(P_1_st)=2, C_1_ev=1, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=0, e=0, i=1, max_loop=2, num=1, P_1_ev=1, P_1_i=1, P_1_pc=1, P_1_st=0, timer=1] [L219] __retres1 = 0 VAL [\old(C_1_st)=2, \old(P_1_st)=2, __retres1=0, C_1_ev=1, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=0, e=0, i=1, max_loop=2, num=1, P_1_ev=1, P_1_i=1, P_1_pc=1, P_1_st=0, timer=1] [L221] return (__retres1); [L389] RET, EXPR is_C_1_triggered() [L389] tmp___1 = is_C_1_triggered() [L391] COND FALSE !(\read(tmp___1)) [L468] RET activate_threads() VAL [C_1_ev=1, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=0, e=0, i=1, kernel_st=4, max_loop=2, num=1, P_1_ev=1, P_1_i=1, P_1_pc=1, P_1_st=0, timer=1, tmp=0] [L469] CALL reset_time_events() [L360] COND TRUE (int )P_1_ev == 1 [L361] P_1_ev = 2 [L365] COND TRUE (int )C_1_ev == 1 [L366] C_1_ev = 2 [L469] RET reset_time_events() [L475] CALL, EXPR stop_simulation() [L412] int tmp ; [L413] int __retres2 ; VAL [C_1_ev=2, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=0, e=0, i=1, max_loop=2, num=1, P_1_ev=2, P_1_i=1, P_1_pc=1, P_1_st=0, timer=1] [L417] CALL, EXPR exists_runnable_thread() VAL [C_1_ev=2, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=0, e=0, i=1, max_loop=2, num=1, P_1_ev=2, P_1_i=1, P_1_pc=1, P_1_st=0, timer=1] [L251] int __retres1 ; [L254] COND TRUE (int )P_1_st == 0 [L255] __retres1 = 1 [L268] return (__retres1); [L417] RET, EXPR exists_runnable_thread() VAL [C_1_ev=2, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=0, e=0, exists_runnable_thread()=1, i=1, max_loop=2, num=1, P_1_ev=2, P_1_i=1, P_1_pc=1, P_1_st=0, timer=1] [L417] tmp = exists_runnable_thread() [L419] COND TRUE \read(tmp) [L420] __retres2 = 0 [L427] return (__retres2); [L475] RET, EXPR stop_simulation() [L475] tmp___0 = stop_simulation() [L477] COND FALSE !(\read(tmp___0)) VAL [C_1_ev=2, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=0, e=0, i=1, kernel_st=4, max_loop=2, num=1, P_1_ev=2, P_1_i=1, P_1_pc=1, P_1_st=0, timer=1, tmp=0, tmp___0=0] [L445] COND TRUE 1 [L448] kernel_st = 1 [L449] CALL eval() [L272] int tmp ; [L273] int tmp___0 ; [L274] int tmp___1 ; [L275] int tmp___2 ; VAL [C_1_ev=2, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=0, e=0, i=1, max_loop=2, num=1, P_1_ev=2, P_1_i=1, P_1_pc=1, P_1_st=0, timer=1] [L279] COND TRUE 1 VAL [C_1_ev=2, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=0, e=0, i=1, max_loop=2, num=1, P_1_ev=2, P_1_i=1, P_1_pc=1, P_1_st=0, timer=1] [L282] CALL, EXPR exists_runnable_thread() VAL [C_1_ev=2, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=0, e=0, i=1, max_loop=2, num=1, P_1_ev=2, P_1_i=1, P_1_pc=1, P_1_st=0, timer=1] [L251] int __retres1 ; [L254] COND TRUE (int )P_1_st == 0 [L255] __retres1 = 1 [L268] return (__retres1); [L282] RET, EXPR exists_runnable_thread() VAL [C_1_ev=2, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=0, e=0, exists_runnable_thread()=1, i=1, max_loop=2, num=1, P_1_ev=2, P_1_i=1, P_1_pc=1, P_1_st=0, timer=1] [L282] tmp___2 = exists_runnable_thread() [L284] COND TRUE \read(tmp___2) VAL [C_1_ev=2, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=0, e=0, i=1, max_loop=2, num=1, P_1_ev=2, P_1_i=1, P_1_pc=1, P_1_st=0, timer=1, tmp___2=1] [L289] COND TRUE (int )P_1_st == 0 [L291] tmp = __VERIFIER_nondet_int() [L293] COND TRUE \read(tmp) [L295] P_1_st = 1 [L296] CALL P_1() [L82] COND FALSE !((int )P_1_pc == 0) [L85] COND TRUE (int )P_1_pc == 1 VAL [C_1_ev=2, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=0, e=0, i=1, max_loop=2, num=1, P_1_ev=2, P_1_i=1, P_1_pc=1, P_1_st=1, timer=1] [L93] COND TRUE i < max_loop [L96] CALL write_data(num, 'A') [L59] COND FALSE !(i___0 == 0) VAL [\old(c)=65, \old(i___0)=1, c=65, C_1_ev=2, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=0, e=0, i=1, i___0=1, max_loop=2, num=1, P_1_ev=2, P_1_i=1, P_1_pc=1, P_1_st=1, timer=1] [L62] COND TRUE i___0 == 1 [L63] data_1 = c VAL [\old(c)=65, \old(i___0)=1, c=65, C_1_ev=2, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=65, e=0, i=1, i___0=1, max_loop=2, num=1, P_1_ev=2, P_1_i=1, P_1_pc=1, P_1_st=1, timer=1] [L96] RET write_data(num, 'A') [L97] num += 1 [L98] P_1_pc = 1 [L99] P_1_st = 2 VAL [C_1_ev=2, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=65, e=0, i=1, max_loop=2, num=2, P_1_ev=2, P_1_i=1, P_1_pc=1, P_1_st=2, timer=1] [L296] RET P_1() [L304] COND FALSE !((int )C_1_st == 0) VAL [C_1_ev=2, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=65, e=0, i=1, max_loop=2, num=2, P_1_ev=2, P_1_i=1, P_1_pc=1, P_1_st=2, timer=1, tmp=-2, tmp___2=1] [L279] COND TRUE 1 VAL [C_1_ev=2, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=65, e=0, i=1, max_loop=2, num=2, P_1_ev=2, P_1_i=1, P_1_pc=1, P_1_st=2, timer=1, tmp=-2, tmp___2=1] [L282] CALL, EXPR exists_runnable_thread() VAL [C_1_ev=2, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=65, e=0, i=1, max_loop=2, num=2, P_1_ev=2, P_1_i=1, P_1_pc=1, P_1_st=2, timer=1] [L251] int __retres1 ; [L254] COND FALSE !((int )P_1_st == 0) [L258] COND FALSE !((int )C_1_st == 0) [L266] __retres1 = 0 [L268] return (__retres1); [L282] RET, EXPR exists_runnable_thread() VAL [C_1_ev=2, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=65, e=0, exists_runnable_thread()=0, i=1, max_loop=2, num=2, P_1_ev=2, P_1_i=1, P_1_pc=1, P_1_st=2, timer=1, tmp=-2, tmp___2=1] [L282] tmp___2 = exists_runnable_thread() [L284] COND FALSE !(\read(tmp___2)) VAL [C_1_ev=2, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=65, e=0, i=1, max_loop=2, num=2, P_1_ev=2, P_1_i=1, P_1_pc=1, P_1_st=2, timer=1, tmp=-2, tmp___2=0] [L449] RET eval() [L452] kernel_st = 2 VAL [C_1_ev=2, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=65, e=0, i=1, kernel_st=2, max_loop=2, num=2, P_1_ev=2, P_1_i=1, P_1_pc=1, P_1_st=2, timer=1, tmp=0, tmp___0=0] [L453] FCALL update_channels() VAL [C_1_ev=2, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=65, e=0, i=1, kernel_st=2, max_loop=2, num=2, P_1_ev=2, P_1_i=1, P_1_pc=1, P_1_st=2, timer=1, tmp=0, tmp___0=0] [L456] kernel_st = 3 VAL [C_1_ev=2, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=65, e=0, i=1, kernel_st=3, max_loop=2, num=2, P_1_ev=2, P_1_i=1, P_1_pc=1, P_1_st=2, timer=1, tmp=0, tmp___0=0] [L457] FCALL fire_delta_events() VAL [C_1_ev=2, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=65, e=0, i=1, kernel_st=3, max_loop=2, num=2, P_1_ev=2, P_1_i=1, P_1_pc=1, P_1_st=2, timer=1, tmp=0, tmp___0=0] [L458] CALL activate_threads() VAL [\old(C_1_st)=2, \old(P_1_st)=2, C_1_ev=2, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=65, e=0, i=1, max_loop=2, num=2, P_1_ev=2, P_1_i=1, P_1_pc=1, P_1_st=2, timer=1] [L375] int tmp ; [L376] int tmp___0 ; [L377] int tmp___1 ; [L381] CALL, EXPR is_P_1_triggered() [L114] int __retres1 ; VAL [\old(C_1_st)=2, \old(P_1_st)=2, C_1_ev=2, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=65, e=0, i=1, max_loop=2, num=2, P_1_ev=2, P_1_i=1, P_1_pc=1, P_1_st=2, timer=1] [L117] COND TRUE (int )P_1_pc == 1 VAL [\old(C_1_st)=2, \old(P_1_st)=2, C_1_ev=2, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=65, e=0, i=1, max_loop=2, num=2, P_1_ev=2, P_1_i=1, P_1_pc=1, P_1_st=2, timer=1] [L118] COND FALSE !((int )P_1_ev == 1) VAL [\old(C_1_st)=2, \old(P_1_st)=2, C_1_ev=2, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=65, e=0, i=1, max_loop=2, num=2, P_1_ev=2, P_1_i=1, P_1_pc=1, P_1_st=2, timer=1] [L127] __retres1 = 0 VAL [\old(C_1_st)=2, \old(P_1_st)=2, __retres1=0, C_1_ev=2, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=65, e=0, i=1, max_loop=2, num=2, P_1_ev=2, P_1_i=1, P_1_pc=1, P_1_st=2, timer=1] [L129] return (__retres1); [L381] RET, EXPR is_P_1_triggered() [L381] tmp = is_P_1_triggered() [L383] COND FALSE !(\read(tmp)) [L389] CALL, EXPR is_C_1_triggered() [L196] int __retres1 ; VAL [\old(C_1_st)=2, \old(P_1_st)=2, C_1_ev=2, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=65, e=0, i=1, max_loop=2, num=2, P_1_ev=2, P_1_i=1, P_1_pc=1, P_1_st=2, timer=1] [L199] COND TRUE (int )C_1_pc == 1 VAL [\old(C_1_st)=2, \old(P_1_st)=2, C_1_ev=2, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=65, e=0, i=1, max_loop=2, num=2, P_1_ev=2, P_1_i=1, P_1_pc=1, P_1_st=2, timer=1] [L200] COND FALSE !((int )e == 1) VAL [\old(C_1_st)=2, \old(P_1_st)=2, C_1_ev=2, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=65, e=0, i=1, max_loop=2, num=2, P_1_ev=2, P_1_i=1, P_1_pc=1, P_1_st=2, timer=1] [L209] COND FALSE !((int )C_1_pc == 2) VAL [\old(C_1_st)=2, \old(P_1_st)=2, C_1_ev=2, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=65, e=0, i=1, max_loop=2, num=2, P_1_ev=2, P_1_i=1, P_1_pc=1, P_1_st=2, timer=1] [L219] __retres1 = 0 VAL [\old(C_1_st)=2, \old(P_1_st)=2, __retres1=0, C_1_ev=2, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=65, e=0, i=1, max_loop=2, num=2, P_1_ev=2, P_1_i=1, P_1_pc=1, P_1_st=2, timer=1] [L221] return (__retres1); [L389] RET, EXPR is_C_1_triggered() [L389] tmp___1 = is_C_1_triggered() [L391] COND FALSE !(\read(tmp___1)) [L458] RET activate_threads() VAL [C_1_ev=2, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=65, e=0, i=1, kernel_st=3, max_loop=2, num=2, P_1_ev=2, P_1_i=1, P_1_pc=1, P_1_st=2, timer=1, tmp=0, tmp___0=0] [L459] FCALL reset_delta_events() VAL [C_1_ev=2, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=65, e=0, i=1, kernel_st=3, max_loop=2, num=2, P_1_ev=2, P_1_i=1, P_1_pc=1, P_1_st=2, timer=1, tmp=0, tmp___0=0] [L462] CALL, EXPR exists_runnable_thread() VAL [C_1_ev=2, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=65, e=0, i=1, max_loop=2, num=2, P_1_ev=2, P_1_i=1, P_1_pc=1, P_1_st=2, timer=1] [L251] int __retres1 ; [L254] COND FALSE !((int )P_1_st == 0) [L258] COND FALSE !((int )C_1_st == 0) [L266] __retres1 = 0 [L268] return (__retres1); [L462] RET, EXPR exists_runnable_thread() VAL [C_1_ev=2, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=65, e=0, exists_runnable_thread()=0, i=1, kernel_st=3, max_loop=2, num=2, P_1_ev=2, P_1_i=1, P_1_pc=1, P_1_st=2, timer=1, tmp=0, tmp___0=0] [L462] tmp = exists_runnable_thread() [L464] COND TRUE tmp == 0 [L466] kernel_st = 4 [L467] CALL fire_time_events() [L346] C_1_ev = 1 [L348] P_1_ev = 1 [L467] RET fire_time_events() [L468] CALL activate_threads() VAL [\old(C_1_st)=2, \old(P_1_st)=2, C_1_ev=1, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=65, e=0, i=1, max_loop=2, num=2, P_1_ev=1, P_1_i=1, P_1_pc=1, P_1_st=2, timer=1] [L375] int tmp ; [L376] int tmp___0 ; [L377] int tmp___1 ; [L381] CALL, EXPR is_P_1_triggered() [L114] int __retres1 ; VAL [\old(C_1_st)=2, \old(P_1_st)=2, C_1_ev=1, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=65, e=0, i=1, max_loop=2, num=2, P_1_ev=1, P_1_i=1, P_1_pc=1, P_1_st=2, timer=1] [L117] COND TRUE (int )P_1_pc == 1 VAL [\old(C_1_st)=2, \old(P_1_st)=2, C_1_ev=1, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=65, e=0, i=1, max_loop=2, num=2, P_1_ev=1, P_1_i=1, P_1_pc=1, P_1_st=2, timer=1] [L118] COND TRUE (int )P_1_ev == 1 [L119] __retres1 = 1 VAL [\old(C_1_st)=2, \old(P_1_st)=2, __retres1=1, C_1_ev=1, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=65, e=0, i=1, max_loop=2, num=2, P_1_ev=1, P_1_i=1, P_1_pc=1, P_1_st=2, timer=1] [L129] return (__retres1); [L381] RET, EXPR is_P_1_triggered() [L381] tmp = is_P_1_triggered() [L383] COND TRUE \read(tmp) [L384] P_1_st = 0 [L389] CALL, EXPR is_C_1_triggered() [L196] int __retres1 ; VAL [\old(C_1_st)=2, \old(P_1_st)=2, C_1_ev=1, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=65, e=0, i=1, max_loop=2, num=2, P_1_ev=1, P_1_i=1, P_1_pc=1, P_1_st=0, timer=1] [L199] COND TRUE (int )C_1_pc == 1 VAL [\old(C_1_st)=2, \old(P_1_st)=2, C_1_ev=1, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=65, e=0, i=1, max_loop=2, num=2, P_1_ev=1, P_1_i=1, P_1_pc=1, P_1_st=0, timer=1] [L200] COND FALSE !((int )e == 1) VAL [\old(C_1_st)=2, \old(P_1_st)=2, C_1_ev=1, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=65, e=0, i=1, max_loop=2, num=2, P_1_ev=1, P_1_i=1, P_1_pc=1, P_1_st=0, timer=1] [L209] COND FALSE !((int )C_1_pc == 2) VAL [\old(C_1_st)=2, \old(P_1_st)=2, C_1_ev=1, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=65, e=0, i=1, max_loop=2, num=2, P_1_ev=1, P_1_i=1, P_1_pc=1, P_1_st=0, timer=1] [L219] __retres1 = 0 VAL [\old(C_1_st)=2, \old(P_1_st)=2, __retres1=0, C_1_ev=1, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=65, e=0, i=1, max_loop=2, num=2, P_1_ev=1, P_1_i=1, P_1_pc=1, P_1_st=0, timer=1] [L221] return (__retres1); [L389] RET, EXPR is_C_1_triggered() [L389] tmp___1 = is_C_1_triggered() [L391] COND FALSE !(\read(tmp___1)) [L468] RET activate_threads() VAL [C_1_ev=1, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=65, e=0, i=1, kernel_st=4, max_loop=2, num=2, P_1_ev=1, P_1_i=1, P_1_pc=1, P_1_st=0, timer=1, tmp=0, tmp___0=0] [L469] CALL reset_time_events() [L360] COND TRUE (int )P_1_ev == 1 [L361] P_1_ev = 2 [L365] COND TRUE (int )C_1_ev == 1 [L366] C_1_ev = 2 [L469] RET reset_time_events() [L475] CALL, EXPR stop_simulation() [L412] int tmp ; [L413] int __retres2 ; VAL [C_1_ev=2, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=65, e=0, i=1, max_loop=2, num=2, P_1_ev=2, P_1_i=1, P_1_pc=1, P_1_st=0, timer=1] [L417] CALL, EXPR exists_runnable_thread() VAL [C_1_ev=2, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=65, e=0, i=1, max_loop=2, num=2, P_1_ev=2, P_1_i=1, P_1_pc=1, P_1_st=0, timer=1] [L251] int __retres1 ; [L254] COND TRUE (int )P_1_st == 0 [L255] __retres1 = 1 [L268] return (__retres1); [L417] RET, EXPR exists_runnable_thread() VAL [C_1_ev=2, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=65, e=0, exists_runnable_thread()=1, i=1, max_loop=2, num=2, P_1_ev=2, P_1_i=1, P_1_pc=1, P_1_st=0, timer=1] [L417] tmp = exists_runnable_thread() [L419] COND TRUE \read(tmp) [L420] __retres2 = 0 [L427] return (__retres2); [L475] RET, EXPR stop_simulation() [L475] tmp___0 = stop_simulation() [L477] COND FALSE !(\read(tmp___0)) VAL [C_1_ev=2, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=65, e=0, i=1, kernel_st=4, max_loop=2, num=2, P_1_ev=2, P_1_i=1, P_1_pc=1, P_1_st=0, timer=1, tmp=0, tmp___0=0] [L445] COND TRUE 1 [L448] kernel_st = 1 [L449] CALL eval() [L272] int tmp ; [L273] int tmp___0 ; [L274] int tmp___1 ; [L275] int tmp___2 ; VAL [C_1_ev=2, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=65, e=0, i=1, max_loop=2, num=2, P_1_ev=2, P_1_i=1, P_1_pc=1, P_1_st=0, timer=1] [L279] COND TRUE 1 VAL [C_1_ev=2, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=65, e=0, i=1, max_loop=2, num=2, P_1_ev=2, P_1_i=1, P_1_pc=1, P_1_st=0, timer=1] [L282] CALL, EXPR exists_runnable_thread() VAL [C_1_ev=2, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=65, e=0, i=1, max_loop=2, num=2, P_1_ev=2, P_1_i=1, P_1_pc=1, P_1_st=0, timer=1] [L251] int __retres1 ; [L254] COND TRUE (int )P_1_st == 0 [L255] __retres1 = 1 [L268] return (__retres1); [L282] RET, EXPR exists_runnable_thread() VAL [C_1_ev=2, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=65, e=0, exists_runnable_thread()=1, i=1, max_loop=2, num=2, P_1_ev=2, P_1_i=1, P_1_pc=1, P_1_st=0, timer=1] [L282] tmp___2 = exists_runnable_thread() [L284] COND TRUE \read(tmp___2) VAL [C_1_ev=2, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=65, e=0, i=1, max_loop=2, num=2, P_1_ev=2, P_1_i=1, P_1_pc=1, P_1_st=0, timer=1, tmp___2=1] [L289] COND TRUE (int )P_1_st == 0 [L291] tmp = __VERIFIER_nondet_int() [L293] COND TRUE \read(tmp) [L295] P_1_st = 1 [L296] CALL P_1() [L82] COND FALSE !((int )P_1_pc == 0) [L85] COND TRUE (int )P_1_pc == 1 VAL [C_1_ev=2, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=65, e=0, i=1, max_loop=2, num=2, P_1_ev=2, P_1_i=1, P_1_pc=1, P_1_st=1, timer=1] [L93] COND TRUE i < max_loop [L96] CALL write_data(num, 'A') [L59] COND FALSE !(i___0 == 0) VAL [\old(c)=65, \old(i___0)=2, c=65, C_1_ev=2, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=65, e=0, i=1, i___0=2, max_loop=2, num=2, P_1_ev=2, P_1_i=1, P_1_pc=1, P_1_st=1, timer=1] [L62] COND FALSE !(i___0 == 1) VAL [\old(c)=65, \old(i___0)=2, c=65, C_1_ev=2, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=65, e=0, i=1, i___0=2, max_loop=2, num=2, P_1_ev=2, P_1_i=1, P_1_pc=1, P_1_st=1, timer=1] [L66] CALL error() VAL [C_1_ev=2, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=65, e=0, i=1, max_loop=2, num=2, P_1_ev=2, P_1_i=1, P_1_pc=1, P_1_st=1, timer=1] [L19] reach_error() VAL [C_1_ev=2, C_1_i=1, C_1_pc=1, C_1_pr=0, C_1_st=2, data_0=65, data_1=65, e=0, i=1, max_loop=2, num=2, P_1_ev=2, P_1_i=1, P_1_pc=1, P_1_st=1, timer=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 75 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 52.4s, OverallIterations: 23, TraceHistogramMax: 10, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.1s, AutomataDifference: 14.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4243 SdHoareTripleChecker+Valid, 5.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4185 mSDsluCounter, 7908 SdHoareTripleChecker+Invalid, 4.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 6038 mSDsCounter, 1347 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6125 IncrementalHoareTripleChecker+Invalid, 7472 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1347 mSolverCounterUnsat, 2860 mSDtfsCounter, 6125 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2154 GetRequests, 1785 SyntacticMatches, 7 SemanticMatches, 362 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17121 ImplicationChecksByTransitivity, 15.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=5873occurred in iteration=15, InterpolantAutomatonStates: 268, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 5.4s AutomataMinimizationTime, 22 MinimizatonAttempts, 10764 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 4.8s InterpolantComputationTime, 3092 NumberOfCodeBlocks, 3092 NumberOfCodeBlocksAsserted, 35 NumberOfCheckSat, 3289 ConstructedInterpolants, 0 QuantifiedInterpolants, 6227 SizeOfPredicates, 12 NumberOfNonLiveVariables, 3803 ConjunctsInSsa, 74 ConjunctsInUnsatCore, 37 InterpolantComputations, 20 PerfectInterpolantSequences, 2429/2663 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-11-23 02:11:29,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e3f297e-a703-4858-9aa0-882ef24fa187/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE