./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec0_product36.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_11f47559-ec1b-452c-9f46-5494a1750a68/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11f47559-ec1b-452c-9f46-5494a1750a68/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_11f47559-ec1b-452c-9f46-5494a1750a68/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11f47559-ec1b-452c-9f46-5494a1750a68/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec0_product36.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11f47559-ec1b-452c-9f46-5494a1750a68/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_11f47559-ec1b-452c-9f46-5494a1750a68/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 331c48a04a8caddf27498f6f02cdac644ba512a5bbe373bec7a9be0d5f3b8263 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:27:20,589 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:27:20,592 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:27:20,654 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:27:20,654 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:27:20,659 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:27:20,661 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:27:20,665 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:27:20,668 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:27:20,675 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:27:20,676 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:27:20,678 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:27:20,679 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:27:20,682 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:27:20,684 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:27:20,690 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:27:20,692 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:27:20,694 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:27:20,696 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:27:20,706 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:27:20,708 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:27:20,710 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:27:20,714 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:27:20,715 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:27:20,719 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:27:20,719 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:27:20,720 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:27:20,722 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:27:20,723 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:27:20,725 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:27:20,725 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:27:20,726 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:27:20,728 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:27:20,730 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:27:20,731 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:27:20,732 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:27:20,733 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:27:20,733 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:27:20,733 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:27:20,734 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:27:20,735 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:27:20,737 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11f47559-ec1b-452c-9f46-5494a1750a68/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 02:27:20,782 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:27:20,782 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:27:20,783 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:27:20,783 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:27:20,790 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:27:20,790 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:27:20,791 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:27:20,791 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:27:20,791 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:27:20,791 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:27:20,792 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:27:20,793 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:27:20,793 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:27:20,793 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:27:20,793 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:27:20,794 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:27:20,794 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:27:20,794 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:27:20,795 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:27:20,795 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:27:20,795 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:27:20,795 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:27:20,796 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:27:20,796 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:27:20,796 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:27:20,796 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:27:20,796 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:27:20,797 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:27:20,797 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:27:20,797 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:27:20,797 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:27:20,798 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:27:20,798 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:27:20,798 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:27:20,798 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:27:20,799 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:27:20,799 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:27:20,799 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:27:20,799 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:27:20,800 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:27:20,800 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:27:20,800 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_11f47559-ec1b-452c-9f46-5494a1750a68/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11f47559-ec1b-452c-9f46-5494a1750a68/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 331c48a04a8caddf27498f6f02cdac644ba512a5bbe373bec7a9be0d5f3b8263 [2021-11-23 02:27:21,114 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:27:21,135 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:27:21,138 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:27:21,139 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:27:21,140 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:27:21,141 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11f47559-ec1b-452c-9f46-5494a1750a68/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/product-lines/email_spec0_product36.cil.c [2021-11-23 02:27:21,200 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11f47559-ec1b-452c-9f46-5494a1750a68/bin/utaipan-EQgc7hIp5V/data/7b8f0d0b6/d86ae4bd6d964490ace30a54f380b733/FLAG37e3cc8a2 [2021-11-23 02:27:21,758 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:27:21,759 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11f47559-ec1b-452c-9f46-5494a1750a68/sv-benchmarks/c/product-lines/email_spec0_product36.cil.c [2021-11-23 02:27:21,792 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11f47559-ec1b-452c-9f46-5494a1750a68/bin/utaipan-EQgc7hIp5V/data/7b8f0d0b6/d86ae4bd6d964490ace30a54f380b733/FLAG37e3cc8a2 [2021-11-23 02:27:22,020 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11f47559-ec1b-452c-9f46-5494a1750a68/bin/utaipan-EQgc7hIp5V/data/7b8f0d0b6/d86ae4bd6d964490ace30a54f380b733 [2021-11-23 02:27:22,022 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:27:22,024 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:27:22,028 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:27:22,029 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:27:22,032 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:27:22,033 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:27:22" (1/1) ... [2021-11-23 02:27:22,035 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19d5b155 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:22, skipping insertion in model container [2021-11-23 02:27:22,037 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:27:22" (1/1) ... [2021-11-23 02:27:22,046 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:27:22,135 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:27:22,451 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_11f47559-ec1b-452c-9f46-5494a1750a68/sv-benchmarks/c/product-lines/email_spec0_product36.cil.c[12529,12542] [2021-11-23 02:27:22,769 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:27:22,793 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:27:22,850 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_11f47559-ec1b-452c-9f46-5494a1750a68/sv-benchmarks/c/product-lines/email_spec0_product36.cil.c[12529,12542] [2021-11-23 02:27:22,947 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:27:22,982 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:27:22,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:22 WrapperNode [2021-11-23 02:27:22,983 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:27:22,985 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:27:22,985 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:27:22,985 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:27:22,994 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:22" (1/1) ... [2021-11-23 02:27:23,033 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:22" (1/1) ... [2021-11-23 02:27:23,112 INFO L137 Inliner]: procedures = 113, calls = 154, calls flagged for inlining = 41, calls inlined = 36, statements flattened = 695 [2021-11-23 02:27:23,119 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:27:23,123 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:27:23,123 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:27:23,124 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:27:23,132 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:22" (1/1) ... [2021-11-23 02:27:23,133 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:22" (1/1) ... [2021-11-23 02:27:23,137 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:22" (1/1) ... [2021-11-23 02:27:23,138 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:22" (1/1) ... [2021-11-23 02:27:23,154 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:22" (1/1) ... [2021-11-23 02:27:23,162 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:22" (1/1) ... [2021-11-23 02:27:23,166 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:22" (1/1) ... [2021-11-23 02:27:23,172 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:27:23,173 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:27:23,173 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:27:23,174 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:27:23,175 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:22" (1/1) ... [2021-11-23 02:27:23,199 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:27:23,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11f47559-ec1b-452c-9f46-5494a1750a68/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:27:23,224 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11f47559-ec1b-452c-9f46-5494a1750a68/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:27:23,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11f47559-ec1b-452c-9f46-5494a1750a68/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:27:23,289 INFO L130 BoogieDeclarations]: Found specification of procedure getClientAddressBookSize [2021-11-23 02:27:23,290 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientAddressBookSize [2021-11-23 02:27:23,290 INFO L130 BoogieDeclarations]: Found specification of procedure setClientAddressBookAddress [2021-11-23 02:27:23,290 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientAddressBookAddress [2021-11-23 02:27:23,290 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailTo [2021-11-23 02:27:23,290 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailTo [2021-11-23 02:27:23,291 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing__wrappee__AutoResponder [2021-11-23 02:27:23,291 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing__wrappee__AutoResponder [2021-11-23 02:27:23,291 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailFrom [2021-11-23 02:27:23,291 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailFrom [2021-11-23 02:27:23,291 INFO L130 BoogieDeclarations]: Found specification of procedure isReadable [2021-11-23 02:27:23,291 INFO L138 BoogieDeclarations]: Found implementation of procedure isReadable [2021-11-23 02:27:23,311 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-23 02:27:23,311 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailFrom [2021-11-23 02:27:23,311 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailFrom [2021-11-23 02:27:23,311 INFO L130 BoogieDeclarations]: Found specification of procedure queue [2021-11-23 02:27:23,311 INFO L138 BoogieDeclarations]: Found implementation of procedure queue [2021-11-23 02:27:23,311 INFO L130 BoogieDeclarations]: Found specification of procedure setClientId [2021-11-23 02:27:23,311 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientId [2021-11-23 02:27:23,312 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:27:23,312 INFO L130 BoogieDeclarations]: Found specification of procedure setClientAddressBookSize [2021-11-23 02:27:23,312 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientAddressBookSize [2021-11-23 02:27:23,312 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing [2021-11-23 02:27:23,312 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing [2021-11-23 02:27:23,312 INFO L130 BoogieDeclarations]: Found specification of procedure sendEmail [2021-11-23 02:27:23,313 INFO L138 BoogieDeclarations]: Found implementation of procedure sendEmail [2021-11-23 02:27:23,313 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailTo [2021-11-23 02:27:23,313 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailTo [2021-11-23 02:27:23,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:27:23,314 INFO L130 BoogieDeclarations]: Found specification of procedure getClientAddressBookAddress [2021-11-23 02:27:23,314 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientAddressBookAddress [2021-11-23 02:27:23,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:27:23,314 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:27:23,547 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:27:23,549 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:27:24,220 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:27:24,505 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:27:24,506 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 02:27:24,509 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:27:24 BoogieIcfgContainer [2021-11-23 02:27:24,509 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:27:24,511 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:27:24,511 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:27:24,514 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:27:24,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:27:22" (1/3) ... [2021-11-23 02:27:24,516 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43a7b699 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:27:24, skipping insertion in model container [2021-11-23 02:27:24,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:22" (2/3) ... [2021-11-23 02:27:24,516 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43a7b699 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:27:24, skipping insertion in model container [2021-11-23 02:27:24,517 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:27:24" (3/3) ... [2021-11-23 02:27:24,518 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec0_product36.cil.c [2021-11-23 02:27:24,524 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:27:24,524 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:27:24,575 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:27:24,583 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 02:27:24,586 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:27:24,619 INFO L276 IsEmpty]: Start isEmpty. Operand has 122 states, 75 states have (on average 1.4133333333333333) internal successors, (106), 78 states have internal predecessors, (106), 31 states have call successors, (31), 14 states have call predecessors, (31), 14 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2021-11-23 02:27:24,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-23 02:27:24,627 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:27:24,627 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:27:24,628 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting outgoing__wrappee__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__wrappee__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:27:24,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:27:24,632 INFO L85 PathProgramCache]: Analyzing trace with hash -928715630, now seen corresponding path program 1 times [2021-11-23 02:27:24,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:27:24,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180601198] [2021-11-23 02:27:24,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:24,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:27:24,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:25,027 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:27:25,027 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:27:25,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180601198] [2021-11-23 02:27:25,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180601198] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:27:25,029 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:27:25,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:27:25,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932951945] [2021-11-23 02:27:25,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:27:25,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 02:27:25,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:27:25,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 02:27:25,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 02:27:25,104 INFO L87 Difference]: Start difference. First operand has 122 states, 75 states have (on average 1.4133333333333333) internal successors, (106), 78 states have internal predecessors, (106), 31 states have call successors, (31), 14 states have call predecessors, (31), 14 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) Second operand has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-23 02:27:25,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:27:25,285 INFO L93 Difference]: Finished difference Result 201 states and 271 transitions. [2021-11-23 02:27:25,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 02:27:25,288 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 55 [2021-11-23 02:27:25,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:27:25,304 INFO L225 Difference]: With dead ends: 201 [2021-11-23 02:27:25,305 INFO L226 Difference]: Without dead ends: 119 [2021-11-23 02:27:25,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 02:27:25,316 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:27:25,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 137 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:27:25,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-11-23 02:27:25,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2021-11-23 02:27:25,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 73 states have (on average 1.36986301369863) internal successors, (100), 75 states have internal predecessors, (100), 31 states have call successors, (31), 14 states have call predecessors, (31), 14 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2021-11-23 02:27:25,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 161 transitions. [2021-11-23 02:27:25,388 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 161 transitions. Word has length 55 [2021-11-23 02:27:25,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:27:25,390 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 161 transitions. [2021-11-23 02:27:25,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-23 02:27:25,391 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 161 transitions. [2021-11-23 02:27:25,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-23 02:27:25,395 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:27:25,395 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:27:25,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:27:25,396 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting outgoing__wrappee__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__wrappee__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:27:25,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:27:25,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1945730734, now seen corresponding path program 1 times [2021-11-23 02:27:25,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:27:25,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981599751] [2021-11-23 02:27:25,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:25,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:27:25,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:25,520 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:27:25,521 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:27:25,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981599751] [2021-11-23 02:27:25,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981599751] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:27:25,523 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:27:25,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:27:25,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322985748] [2021-11-23 02:27:25,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:27:25,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:27:25,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:27:25,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:27:25,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:27:25,529 INFO L87 Difference]: Start difference. First operand 119 states and 161 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-23 02:27:25,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:27:25,668 INFO L93 Difference]: Finished difference Result 197 states and 256 transitions. [2021-11-23 02:27:25,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:27:25,669 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 56 [2021-11-23 02:27:25,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:27:25,674 INFO L225 Difference]: With dead ends: 197 [2021-11-23 02:27:25,675 INFO L226 Difference]: Without dead ends: 121 [2021-11-23 02:27:25,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:27:25,685 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 0 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:27:25,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 267 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:27:25,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-23 02:27:25,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2021-11-23 02:27:25,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 75 states have (on average 1.36) internal successors, (102), 77 states have internal predecessors, (102), 31 states have call successors, (31), 14 states have call predecessors, (31), 14 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2021-11-23 02:27:25,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 163 transitions. [2021-11-23 02:27:25,714 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 163 transitions. Word has length 56 [2021-11-23 02:27:25,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:27:25,715 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 163 transitions. [2021-11-23 02:27:25,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-23 02:27:25,716 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 163 transitions. [2021-11-23 02:27:25,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-23 02:27:25,726 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:27:25,726 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:27:25,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:27:25,727 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting outgoing__wrappee__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__wrappee__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:27:25,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:27:25,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1853590400, now seen corresponding path program 1 times [2021-11-23 02:27:25,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:27:25,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681489527] [2021-11-23 02:27:25,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:25,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:27:25,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:25,884 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:27:25,884 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:27:25,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681489527] [2021-11-23 02:27:25,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681489527] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:27:25,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045308729] [2021-11-23 02:27:25,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:25,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:27:25,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11f47559-ec1b-452c-9f46-5494a1750a68/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:27:25,903 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11f47559-ec1b-452c-9f46-5494a1750a68/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:27:25,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11f47559-ec1b-452c-9f46-5494a1750a68/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:27:26,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:26,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 858 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:27:26,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:27:26,411 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:27:26,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:27:26,592 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:27:26,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045308729] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:27:26,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [141509075] [2021-11-23 02:27:26,632 INFO L159 IcfgInterpreter]: Started Sifa with 51 locations of interest [2021-11-23 02:27:26,637 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:27:26,643 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:27:26,650 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:27:26,651 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:27:35,717 INFO L197 IcfgInterpreter]: Interpreting procedure setClientId with input of size 451 for LOIs [2021-11-23 02:27:36,019 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:27:59,564 WARN L227 SmtUtils]: Spent 8.84s on a formula simplification. DAG size of input: 564 DAG size of output: 394 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:28:06,685 WARN L227 SmtUtils]: Spent 6.46s on a formula simplification. DAG size of input: 566 DAG size of output: 318 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:28:12,230 WARN L227 SmtUtils]: Spent 5.37s on a formula simplification. DAG size of input: 558 DAG size of output: 345 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:28:12,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [141509075] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:28:12,547 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:28:12,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [4, 4, 4] total 19 [2021-11-23 02:28:12,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609741472] [2021-11-23 02:28:12,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:28:12,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 02:28:12,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:28:12,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 02:28:12,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-11-23 02:28:12,551 INFO L87 Difference]: Start difference. First operand 121 states and 163 transitions. Second operand has 14 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-23 02:28:15,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:28:15,857 INFO L93 Difference]: Finished difference Result 307 states and 461 transitions. [2021-11-23 02:28:15,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 02:28:15,859 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 60 [2021-11-23 02:28:15,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:28:15,861 INFO L225 Difference]: With dead ends: 307 [2021-11-23 02:28:15,861 INFO L226 Difference]: Without dead ends: 198 [2021-11-23 02:28:15,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 163 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 36.5s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-11-23 02:28:15,863 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 117 mSDsluCounter, 1546 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 1671 SdHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:28:15,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 1671 Invalid, 805 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-11-23 02:28:15,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-11-23 02:28:15,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 142. [2021-11-23 02:28:15,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 96 states have (on average 1.3958333333333333) internal successors, (134), 98 states have internal predecessors, (134), 31 states have call successors, (31), 14 states have call predecessors, (31), 14 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2021-11-23 02:28:15,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 195 transitions. [2021-11-23 02:28:15,913 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 195 transitions. Word has length 60 [2021-11-23 02:28:15,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:28:15,914 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 195 transitions. [2021-11-23 02:28:15,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-23 02:28:15,914 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 195 transitions. [2021-11-23 02:28:15,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-23 02:28:15,916 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:28:15,916 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:28:15,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11f47559-ec1b-452c-9f46-5494a1750a68/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:28:16,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11f47559-ec1b-452c-9f46-5494a1750a68/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:28:16,142 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting outgoing__wrappee__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__wrappee__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:28:16,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:28:16,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1156196368, now seen corresponding path program 1 times [2021-11-23 02:28:16,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:28:16,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629882183] [2021-11-23 02:28:16,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:28:16,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:28:16,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:28:16,231 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:28:16,232 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:28:16,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629882183] [2021-11-23 02:28:16,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629882183] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:28:16,236 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:28:16,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:28:16,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605982251] [2021-11-23 02:28:16,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:28:16,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:28:16,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:28:16,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:28:16,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:28:16,240 INFO L87 Difference]: Start difference. First operand 142 states and 195 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-23 02:28:16,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:28:16,396 INFO L93 Difference]: Finished difference Result 325 states and 463 transitions. [2021-11-23 02:28:16,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:28:16,397 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 61 [2021-11-23 02:28:16,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:28:16,399 INFO L225 Difference]: With dead ends: 325 [2021-11-23 02:28:16,399 INFO L226 Difference]: Without dead ends: 197 [2021-11-23 02:28:16,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:28:16,401 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 48 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:28:16,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 269 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:28:16,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-11-23 02:28:16,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 192. [2021-11-23 02:28:16,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 143 states have (on average 1.4755244755244756) internal successors, (211), 145 states have internal predecessors, (211), 34 states have call successors, (34), 14 states have call predecessors, (34), 14 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2021-11-23 02:28:16,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 278 transitions. [2021-11-23 02:28:16,469 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 278 transitions. Word has length 61 [2021-11-23 02:28:16,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:28:16,470 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 278 transitions. [2021-11-23 02:28:16,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-23 02:28:16,470 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 278 transitions. [2021-11-23 02:28:16,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-23 02:28:16,472 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:28:16,472 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:28:16,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 02:28:16,472 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting outgoing__wrappee__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__wrappee__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:28:16,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:28:16,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1197564539, now seen corresponding path program 1 times [2021-11-23 02:28:16,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:28:16,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264201818] [2021-11-23 02:28:16,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:28:16,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:28:16,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:28:16,524 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:28:16,524 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:28:16,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264201818] [2021-11-23 02:28:16,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264201818] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:28:16,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818804845] [2021-11-23 02:28:16,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:28:16,525 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:28:16,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11f47559-ec1b-452c-9f46-5494a1750a68/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:28:16,529 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11f47559-ec1b-452c-9f46-5494a1750a68/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:28:16,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11f47559-ec1b-452c-9f46-5494a1750a68/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:28:16,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:28:16,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 875 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:28:16,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:28:16,904 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:28:16,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:28:17,061 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:28:17,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818804845] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:28:17,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1980597221] [2021-11-23 02:28:17,065 INFO L159 IcfgInterpreter]: Started Sifa with 53 locations of interest [2021-11-23 02:28:17,065 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:28:17,066 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:28:17,066 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:28:17,066 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:28:28,896 INFO L197 IcfgInterpreter]: Interpreting procedure setClientId with input of size 452 for LOIs [2021-11-23 02:28:29,162 INFO L197 IcfgInterpreter]: Interpreting procedure sendEmail with input of size 460 for LOIs [2021-11-23 02:28:30,748 INFO L197 IcfgInterpreter]: Interpreting procedure outgoing with input of size 250 for LOIs [2021-11-23 02:28:31,468 INFO L197 IcfgInterpreter]: Interpreting procedure outgoing__wrappee__AutoResponder with input of size 253 for LOIs [2021-11-23 02:28:33,911 INFO L197 IcfgInterpreter]: Interpreting procedure getEmailTo with input of size 241 for LOIs [2021-11-23 02:28:33,953 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailFrom with input of size 476 for LOIs [2021-11-23 02:28:35,504 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailTo with input of size 238 for LOIs [2021-11-23 02:28:35,545 INFO L197 IcfgInterpreter]: Interpreting procedure getClientAddressBookSize with input of size 230 for LOIs [2021-11-23 02:28:35,587 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:28:51,209 WARN L227 SmtUtils]: Spent 5.54s on a formula simplification. DAG size of input: 476 DAG size of output: 277 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:29:08,342 WARN L227 SmtUtils]: Spent 6.20s on a formula simplification. DAG size of input: 557 DAG size of output: 395 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:29:14,755 WARN L227 SmtUtils]: Spent 6.14s on a formula simplification. DAG size of input: 555 DAG size of output: 393 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:29:20,050 WARN L227 SmtUtils]: Spent 5.11s on a formula simplification. DAG size of input: 553 DAG size of output: 350 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:29:41,325 WARN L227 SmtUtils]: Spent 12.08s on a formula simplification. DAG size of input: 476 DAG size of output: 364 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:30:14,716 WARN L227 SmtUtils]: Spent 5.15s on a formula simplification. DAG size of input: 560 DAG size of output: 372 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:30:19,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1980597221] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:30:19,922 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:30:19,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [4, 4, 4] total 47 [2021-11-23 02:30:19,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407372992] [2021-11-23 02:30:19,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:30:19,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-23 02:30:19,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:30:19,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-23 02:30:19,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=2029, Unknown=0, NotChecked=0, Total=2162 [2021-11-23 02:30:19,927 INFO L87 Difference]: Start difference. First operand 192 states and 278 transitions. Second operand has 42 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 25 states have internal predecessors, (34), 12 states have call successors, (13), 9 states have call predecessors, (13), 6 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2021-11-23 02:30:49,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:30:49,257 INFO L93 Difference]: Finished difference Result 485 states and 755 transitions. [2021-11-23 02:30:49,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-23 02:30:49,257 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 25 states have internal predecessors, (34), 12 states have call successors, (13), 9 states have call predecessors, (13), 6 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 62 [2021-11-23 02:30:49,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:30:49,261 INFO L225 Difference]: With dead ends: 485 [2021-11-23 02:30:49,261 INFO L226 Difference]: Without dead ends: 348 [2021-11-23 02:30:49,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 142 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 125.2s TimeCoverageRelationStatistics Valid=190, Invalid=2780, Unknown=0, NotChecked=0, Total=2970 [2021-11-23 02:30:49,265 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 191 mSDsluCounter, 2775 mSDsCounter, 0 mSdLazyCounter, 3127 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 2781 SdHoareTripleChecker+Invalid, 3156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 3127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:30:49,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 2781 Invalid, 3156 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [29 Valid, 3127 Invalid, 0 Unknown, 0 Unchecked, 8.2s Time] [2021-11-23 02:30:49,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-11-23 02:30:49,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 296. [2021-11-23 02:30:49,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 234 states have (on average 1.547008547008547) internal successors, (362), 237 states have internal predecessors, (362), 42 states have call successors, (42), 21 states have call predecessors, (42), 19 states have return successors, (42), 37 states have call predecessors, (42), 41 states have call successors, (42) [2021-11-23 02:30:49,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 446 transitions. [2021-11-23 02:30:49,428 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 446 transitions. Word has length 62 [2021-11-23 02:30:49,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:30:49,429 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 446 transitions. [2021-11-23 02:30:49,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 25 states have internal predecessors, (34), 12 states have call successors, (13), 9 states have call predecessors, (13), 6 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2021-11-23 02:30:49,429 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 446 transitions. [2021-11-23 02:30:49,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-23 02:30:49,432 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:30:49,433 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:30:49,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11f47559-ec1b-452c-9f46-5494a1750a68/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:30:49,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11f47559-ec1b-452c-9f46-5494a1750a68/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:30:49,634 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting outgoing__wrappee__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__wrappee__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:30:49,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:30:49,635 INFO L85 PathProgramCache]: Analyzing trace with hash 42617506, now seen corresponding path program 1 times [2021-11-23 02:30:49,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:30:49,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418501766] [2021-11-23 02:30:49,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:30:49,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:30:49,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:30:49,740 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 02:30:49,740 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:30:49,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418501766] [2021-11-23 02:30:49,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418501766] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:30:49,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937189533] [2021-11-23 02:30:49,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:30:49,741 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:30:49,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11f47559-ec1b-452c-9f46-5494a1750a68/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:30:49,742 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11f47559-ec1b-452c-9f46-5494a1750a68/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:30:49,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11f47559-ec1b-452c-9f46-5494a1750a68/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 02:30:49,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:30:49,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 881 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:30:49,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:30:50,078 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:30:50,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:30:50,209 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:30:50,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937189533] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:30:50,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1395765561] [2021-11-23 02:30:50,214 INFO L159 IcfgInterpreter]: Started Sifa with 53 locations of interest [2021-11-23 02:30:50,214 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:30:50,215 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:30:50,215 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:30:50,215 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:31:08,952 INFO L197 IcfgInterpreter]: Interpreting procedure setClientId with input of size 451 for LOIs [2021-11-23 02:31:09,333 INFO L197 IcfgInterpreter]: Interpreting procedure sendEmail with input of size 464 for LOIs [2021-11-23 02:31:27,797 INFO L197 IcfgInterpreter]: Interpreting procedure outgoing with input of size 462 for LOIs [2021-11-23 02:31:30,921 INFO L197 IcfgInterpreter]: Interpreting procedure outgoing__wrappee__AutoResponder with input of size 253 for LOIs [2021-11-23 02:31:33,307 INFO L197 IcfgInterpreter]: Interpreting procedure getEmailTo with input of size 241 for LOIs [2021-11-23 02:31:33,351 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailFrom with input of size 455 for LOIs [2021-11-23 02:31:33,920 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailTo with input of size 454 for LOIs [2021-11-23 02:31:34,179 INFO L197 IcfgInterpreter]: Interpreting procedure getClientAddressBookSize with input of size 442 for LOIs [2021-11-23 02:31:34,438 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:32:07,307 WARN L227 SmtUtils]: Spent 6.30s on a formula simplification. DAG size of input: 552 DAG size of output: 347 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:33:34,843 WARN L227 SmtUtils]: Spent 5.13s on a formula simplification. DAG size of input: 500 DAG size of output: 337 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:33:41,596 WARN L227 SmtUtils]: Spent 6.32s on a formula simplification. DAG size of input: 560 DAG size of output: 372 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:33:47,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1395765561] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:33:47,641 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:33:47,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [6, 5, 5] total 50 [2021-11-23 02:33:47,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281384707] [2021-11-23 02:33:47,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:33:47,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-23 02:33:47,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:33:47,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-23 02:33:47,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2315, Unknown=0, NotChecked=0, Total=2450 [2021-11-23 02:33:47,644 INFO L87 Difference]: Start difference. First operand 296 states and 446 transitions. Second operand has 42 states, 28 states have (on average 1.25) internal successors, (35), 25 states have internal predecessors, (35), 12 states have call successors, (13), 9 states have call predecessors, (13), 6 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2021-11-23 02:34:18,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:34:18,315 INFO L93 Difference]: Finished difference Result 644 states and 994 transitions. [2021-11-23 02:34:18,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-23 02:34:18,317 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 28 states have (on average 1.25) internal successors, (35), 25 states have internal predecessors, (35), 12 states have call successors, (13), 9 states have call predecessors, (13), 6 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 65 [2021-11-23 02:34:18,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:34:18,320 INFO L225 Difference]: With dead ends: 644 [2021-11-23 02:34:18,320 INFO L226 Difference]: Without dead ends: 388 [2021-11-23 02:34:18,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 150 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 155.2s TimeCoverageRelationStatistics Valid=196, Invalid=3226, Unknown=0, NotChecked=0, Total=3422 [2021-11-23 02:34:18,323 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 332 mSDsluCounter, 3389 mSDsCounter, 0 mSdLazyCounter, 3848 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 3422 SdHoareTripleChecker+Invalid, 3892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 3848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:34:18,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 3422 Invalid, 3892 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [44 Valid, 3848 Invalid, 0 Unknown, 0 Unchecked, 8.4s Time] [2021-11-23 02:34:18,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-11-23 02:34:18,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 316. [2021-11-23 02:34:18,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 254 states have (on average 1.5393700787401574) internal successors, (391), 257 states have internal predecessors, (391), 42 states have call successors, (42), 21 states have call predecessors, (42), 19 states have return successors, (42), 37 states have call predecessors, (42), 41 states have call successors, (42) [2021-11-23 02:34:18,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 475 transitions. [2021-11-23 02:34:18,445 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 475 transitions. Word has length 65 [2021-11-23 02:34:18,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:34:18,446 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 475 transitions. [2021-11-23 02:34:18,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 28 states have (on average 1.25) internal successors, (35), 25 states have internal predecessors, (35), 12 states have call successors, (13), 9 states have call predecessors, (13), 6 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2021-11-23 02:34:18,447 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 475 transitions. [2021-11-23 02:34:18,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-23 02:34:18,448 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:34:18,449 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:34:18,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11f47559-ec1b-452c-9f46-5494a1750a68/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 02:34:18,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11f47559-ec1b-452c-9f46-5494a1750a68/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-23 02:34:18,670 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting outgoing__wrappee__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__wrappee__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:34:18,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:34:18,671 INFO L85 PathProgramCache]: Analyzing trace with hash -511783412, now seen corresponding path program 1 times [2021-11-23 02:34:18,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:34:18,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791544870] [2021-11-23 02:34:18,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:34:18,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:34:18,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:34:18,755 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 02:34:18,755 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:34:18,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791544870] [2021-11-23 02:34:18,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791544870] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:34:18,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186471638] [2021-11-23 02:34:18,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:34:18,756 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:34:18,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11f47559-ec1b-452c-9f46-5494a1750a68/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:34:18,757 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11f47559-ec1b-452c-9f46-5494a1750a68/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:34:18,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11f47559-ec1b-452c-9f46-5494a1750a68/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 02:34:18,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:34:18,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 897 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:34:18,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:34:19,100 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:34:19,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:34:19,251 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:34:19,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186471638] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:34:19,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [380616607] [2021-11-23 02:34:19,256 INFO L159 IcfgInterpreter]: Started Sifa with 55 locations of interest [2021-11-23 02:34:19,256 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:34:19,257 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:34:19,257 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:34:19,257 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:34:33,702 INFO L197 IcfgInterpreter]: Interpreting procedure setClientId with input of size 452 for LOIs [2021-11-23 02:34:33,974 INFO L197 IcfgInterpreter]: Interpreting procedure sendEmail with input of size 460 for LOIs [2021-11-23 02:34:35,439 INFO L197 IcfgInterpreter]: Interpreting procedure outgoing with input of size 248 for LOIs [2021-11-23 02:34:36,115 INFO L197 IcfgInterpreter]: Interpreting procedure outgoing__wrappee__AutoResponder with input of size 253 for LOIs [2021-11-23 02:34:38,381 INFO L197 IcfgInterpreter]: Interpreting procedure getEmailTo with input of size 241 for LOIs [2021-11-23 02:34:38,426 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailFrom with input of size 476 for LOIs [2021-11-23 02:34:39,971 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailTo with input of size 238 for LOIs [2021-11-23 02:34:40,015 INFO L197 IcfgInterpreter]: Interpreting procedure getClientAddressBookSize with input of size 228 for LOIs [2021-11-23 02:34:40,058 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:34:51,890 WARN L227 SmtUtils]: Spent 5.84s on a formula simplification. DAG size of input: 452 DAG size of output: 257 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:34:58,186 WARN L227 SmtUtils]: Spent 6.06s on a formula simplification. DAG size of input: 476 DAG size of output: 277 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:35:10,223 WARN L227 SmtUtils]: Spent 7.76s on a formula simplification. DAG size of input: 554 DAG size of output: 388 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:35:18,316 WARN L227 SmtUtils]: Spent 7.58s on a formula simplification. DAG size of input: 556 DAG size of output: 390 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:35:34,725 WARN L227 SmtUtils]: Spent 6.44s on a formula simplification. DAG size of input: 551 DAG size of output: 350 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:35:45,605 WARN L227 SmtUtils]: Spent 5.30s on a formula simplification. DAG size of input: 559 DAG size of output: 332 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:35:53,755 WARN L227 SmtUtils]: Spent 7.61s on a formula simplification. DAG size of input: 555 DAG size of output: 389 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:36:15,846 WARN L227 SmtUtils]: Spent 14.92s on a formula simplification. DAG size of input: 476 DAG size of output: 364 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:36:50,571 WARN L227 SmtUtils]: Spent 5.47s on a formula simplification. DAG size of input: 500 DAG size of output: 337 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:36:57,611 WARN L227 SmtUtils]: Spent 6.43s on a formula simplification. DAG size of input: 560 DAG size of output: 372 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:37:04,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [380616607] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:37:04,156 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:37:04,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [6, 5, 5] total 52 [2021-11-23 02:37:04,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9187381] [2021-11-23 02:37:04,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:37:04,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-23 02:37:04,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:37:04,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-23 02:37:04,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=2504, Unknown=0, NotChecked=0, Total=2652 [2021-11-23 02:37:04,158 INFO L87 Difference]: Start difference. First operand 316 states and 475 transitions. Second operand has 44 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 27 states have internal predecessors, (37), 12 states have call successors, (13), 9 states have call predecessors, (13), 6 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2021-11-23 02:37:15,110 WARN L227 SmtUtils]: Spent 5.04s on a formula simplification. DAG size of input: 471 DAG size of output: 343 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:37:28,729 WARN L227 SmtUtils]: Spent 5.01s on a formula simplification. DAG size of input: 479 DAG size of output: 347 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:37:34,329 WARN L227 SmtUtils]: Spent 5.17s on a formula simplification. DAG size of input: 487 DAG size of output: 349 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:38:03,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:38:03,366 INFO L93 Difference]: Finished difference Result 765 states and 1201 transitions. [2021-11-23 02:38:03,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-23 02:38:03,367 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 27 states have internal predecessors, (37), 12 states have call successors, (13), 9 states have call predecessors, (13), 6 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 69 [2021-11-23 02:38:03,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:38:03,372 INFO L225 Difference]: With dead ends: 765 [2021-11-23 02:38:03,372 INFO L226 Difference]: Without dead ends: 551 [2021-11-23 02:38:03,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 160 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 190.6s TimeCoverageRelationStatistics Valid=270, Invalid=3890, Unknown=0, NotChecked=0, Total=4160 [2021-11-23 02:38:03,376 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 318 mSDsluCounter, 3787 mSDsCounter, 0 mSdLazyCounter, 4779 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 3848 SdHoareTripleChecker+Invalid, 4846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 4779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:38:03,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 3848 Invalid, 4846 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [67 Valid, 4779 Invalid, 0 Unknown, 0 Unchecked, 12.2s Time] [2021-11-23 02:38:03,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-11-23 02:38:03,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 330. [2021-11-23 02:38:03,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 268 states have (on average 1.5485074626865671) internal successors, (415), 271 states have internal predecessors, (415), 42 states have call successors, (42), 21 states have call predecessors, (42), 19 states have return successors, (42), 37 states have call predecessors, (42), 41 states have call successors, (42) [2021-11-23 02:38:03,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 499 transitions. [2021-11-23 02:38:03,571 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 499 transitions. Word has length 69 [2021-11-23 02:38:03,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:38:03,572 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 499 transitions. [2021-11-23 02:38:03,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 27 states have internal predecessors, (37), 12 states have call successors, (13), 9 states have call predecessors, (13), 6 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2021-11-23 02:38:03,572 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 499 transitions. [2021-11-23 02:38:03,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-23 02:38:03,574 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:38:03,574 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:38:03,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11f47559-ec1b-452c-9f46-5494a1750a68/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 02:38:03,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11f47559-ec1b-452c-9f46-5494a1750a68/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:38:03,782 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting outgoing__wrappee__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoing__wrappee__AutoResponderErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:38:03,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:38:03,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1748745099, now seen corresponding path program 1 times [2021-11-23 02:38:03,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:38:03,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004003072] [2021-11-23 02:38:03,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:38:03,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:38:03,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:38:03,884 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:38:03,885 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:38:03,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004003072] [2021-11-23 02:38:03,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004003072] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:38:03,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881577015] [2021-11-23 02:38:03,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:38:03,886 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:38:03,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11f47559-ec1b-452c-9f46-5494a1750a68/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:38:03,903 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11f47559-ec1b-452c-9f46-5494a1750a68/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:38:03,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11f47559-ec1b-452c-9f46-5494a1750a68/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 02:38:04,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:38:04,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:38:04,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:38:04,289 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:38:04,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:38:04,495 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:38:04,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881577015] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:38:04,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2012311924] [2021-11-23 02:38:04,504 INFO L159 IcfgInterpreter]: Started Sifa with 61 locations of interest [2021-11-23 02:38:04,504 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:38:04,507 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:38:04,507 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:38:04,507 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs