./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec0_product10.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea73c08f-1777-454b-ad02-0144115fc5bf/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea73c08f-1777-454b-ad02-0144115fc5bf/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea73c08f-1777-454b-ad02-0144115fc5bf/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea73c08f-1777-454b-ad02-0144115fc5bf/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec0_product10.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea73c08f-1777-454b-ad02-0144115fc5bf/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea73c08f-1777-454b-ad02-0144115fc5bf/bin/utaipan-6cKwYrpEi9 --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 ac360da941eb2bc713d1cdb41b6939d6a50ea394a41fda87a7330709a6b33058 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 18:53:13,485 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 18:53:13,487 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 18:53:13,512 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 18:53:13,513 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 18:53:13,514 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 18:53:13,516 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 18:53:13,518 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 18:53:13,520 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 18:53:13,522 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 18:53:13,523 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 18:53:13,525 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 18:53:13,526 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 18:53:13,527 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 18:53:13,529 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 18:53:13,530 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 18:53:13,532 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 18:53:13,533 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 18:53:13,535 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 18:53:13,538 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 18:53:13,540 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 18:53:13,541 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 18:53:13,543 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 18:53:13,544 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 18:53:13,549 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 18:53:13,550 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 18:53:13,550 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 18:53:13,552 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 18:53:13,553 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 18:53:13,554 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 18:53:13,555 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 18:53:13,556 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 18:53:13,557 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 18:53:13,559 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 18:53:13,560 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 18:53:13,561 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 18:53:13,562 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 18:53:13,563 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 18:53:13,563 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 18:53:13,564 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 18:53:13,566 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 18:53:13,567 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea73c08f-1777-454b-ad02-0144115fc5bf/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-20 18:53:13,595 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 18:53:13,596 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 18:53:13,596 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 18:53:13,597 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 18:53:13,597 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 18:53:13,598 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 18:53:13,598 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 18:53:13,598 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 18:53:13,599 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 18:53:13,599 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 18:53:13,599 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 18:53:13,600 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 18:53:13,600 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 18:53:13,600 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 18:53:13,601 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 18:53:13,601 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 18:53:13,601 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 18:53:13,602 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 18:53:13,603 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 18:53:13,603 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 18:53:13,603 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 18:53:13,604 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 18:53:13,604 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 18:53:13,604 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 18:53:13,605 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 18:53:13,605 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 18:53:13,605 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 18:53:13,606 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 18:53:13,606 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 18:53:13,606 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 18:53:13,607 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 18:53:13,607 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 18:53:13,607 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 18:53:13,608 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 18:53:13,608 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 18:53:13,608 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 18:53:13,609 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 18:53:13,609 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 18:53:13,609 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 18:53:13,610 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 18:53:13,610 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 18:53:13,610 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea73c08f-1777-454b-ad02-0144115fc5bf/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea73c08f-1777-454b-ad02-0144115fc5bf/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac360da941eb2bc713d1cdb41b6939d6a50ea394a41fda87a7330709a6b33058 [2022-11-20 18:53:13,891 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 18:53:13,926 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 18:53:13,930 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 18:53:13,932 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 18:53:13,932 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 18:53:13,934 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea73c08f-1777-454b-ad02-0144115fc5bf/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/product-lines/email_spec0_product10.cil.c [2022-11-20 18:53:17,326 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 18:53:17,715 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 18:53:17,716 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea73c08f-1777-454b-ad02-0144115fc5bf/sv-benchmarks/c/product-lines/email_spec0_product10.cil.c [2022-11-20 18:53:17,738 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea73c08f-1777-454b-ad02-0144115fc5bf/bin/utaipan-6cKwYrpEi9/data/6261714ed/884a7207012a4ef1bdbca57db4b5381e/FLAGe8feec85a [2022-11-20 18:53:17,757 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea73c08f-1777-454b-ad02-0144115fc5bf/bin/utaipan-6cKwYrpEi9/data/6261714ed/884a7207012a4ef1bdbca57db4b5381e [2022-11-20 18:53:17,760 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 18:53:17,762 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 18:53:17,764 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 18:53:17,764 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 18:53:17,769 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 18:53:17,770 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:53:17" (1/1) ... [2022-11-20 18:53:17,771 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7485e629 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:53:17, skipping insertion in model container [2022-11-20 18:53:17,771 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:53:17" (1/1) ... [2022-11-20 18:53:17,781 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 18:53:17,858 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 18:53:18,097 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea73c08f-1777-454b-ad02-0144115fc5bf/sv-benchmarks/c/product-lines/email_spec0_product10.cil.c[2842,2855] [2022-11-20 18:53:18,490 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 18:53:18,513 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 18:53:18,546 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea73c08f-1777-454b-ad02-0144115fc5bf/sv-benchmarks/c/product-lines/email_spec0_product10.cil.c[2842,2855] [2022-11-20 18:53:18,677 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 18:53:18,707 INFO L208 MainTranslator]: Completed translation [2022-11-20 18:53:18,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:53:18 WrapperNode [2022-11-20 18:53:18,708 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 18:53:18,710 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 18:53:18,710 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 18:53:18,710 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 18:53:18,717 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:53:18" (1/1) ... [2022-11-20 18:53:18,745 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:53:18" (1/1) ... [2022-11-20 18:53:18,812 INFO L138 Inliner]: procedures = 110, calls = 135, calls flagged for inlining = 40, calls inlined = 33, statements flattened = 617 [2022-11-20 18:53:18,817 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 18:53:18,819 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 18:53:18,819 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 18:53:18,819 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 18:53:18,831 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:53:18" (1/1) ... [2022-11-20 18:53:18,832 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:53:18" (1/1) ... [2022-11-20 18:53:18,837 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:53:18" (1/1) ... [2022-11-20 18:53:18,838 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:53:18" (1/1) ... [2022-11-20 18:53:18,851 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:53:18" (1/1) ... [2022-11-20 18:53:18,858 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:53:18" (1/1) ... [2022-11-20 18:53:18,862 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:53:18" (1/1) ... [2022-11-20 18:53:18,866 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:53:18" (1/1) ... [2022-11-20 18:53:18,872 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 18:53:18,873 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 18:53:18,873 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 18:53:18,873 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 18:53:18,874 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:53:18" (1/1) ... [2022-11-20 18:53:18,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 18:53:18,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea73c08f-1777-454b-ad02-0144115fc5bf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 18:53:18,914 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea73c08f-1777-454b-ad02-0144115fc5bf/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 18:53:18,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea73c08f-1777-454b-ad02-0144115fc5bf/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 18:53:18,969 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailTo [2022-11-20 18:53:18,969 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailTo [2022-11-20 18:53:18,970 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailFrom [2022-11-20 18:53:18,970 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailFrom [2022-11-20 18:53:18,970 INFO L130 BoogieDeclarations]: Found specification of procedure isReadable [2022-11-20 18:53:18,970 INFO L138 BoogieDeclarations]: Found implementation of procedure isReadable [2022-11-20 18:53:18,971 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2022-11-20 18:53:18,971 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailFrom [2022-11-20 18:53:18,971 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailFrom [2022-11-20 18:53:18,971 INFO L130 BoogieDeclarations]: Found specification of procedure queue [2022-11-20 18:53:18,972 INFO L138 BoogieDeclarations]: Found implementation of procedure queue [2022-11-20 18:53:18,972 INFO L130 BoogieDeclarations]: Found specification of procedure setClientId [2022-11-20 18:53:18,972 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientId [2022-11-20 18:53:18,972 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 18:53:18,973 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing [2022-11-20 18:53:18,973 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing [2022-11-20 18:53:18,973 INFO L130 BoogieDeclarations]: Found specification of procedure sendEmail [2022-11-20 18:53:18,973 INFO L138 BoogieDeclarations]: Found implementation of procedure sendEmail [2022-11-20 18:53:18,974 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailTo [2022-11-20 18:53:18,974 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailTo [2022-11-20 18:53:18,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 18:53:18,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 18:53:18,975 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 18:53:19,231 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 18:53:19,234 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 18:53:20,099 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 18:53:20,326 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 18:53:20,327 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-20 18:53:20,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:53:20 BoogieIcfgContainer [2022-11-20 18:53:20,330 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 18:53:20,332 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 18:53:20,332 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 18:53:20,336 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 18:53:20,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:53:17" (1/3) ... [2022-11-20 18:53:20,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46f18f5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:53:20, skipping insertion in model container [2022-11-20 18:53:20,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:53:18" (2/3) ... [2022-11-20 18:53:20,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46f18f5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:53:20, skipping insertion in model container [2022-11-20 18:53:20,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:53:20" (3/3) ... [2022-11-20 18:53:20,340 INFO L112 eAbstractionObserver]: Analyzing ICFG email_spec0_product10.cil.c [2022-11-20 18:53:20,363 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 18:53:20,364 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 18:53:20,425 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 18:53:20,433 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5ea68f42, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 18:53:20,433 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 18:53:20,438 INFO L276 IsEmpty]: Start isEmpty. Operand has 92 states, 62 states have (on average 1.4838709677419355) internal successors, (92), 64 states have internal predecessors, (92), 19 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-11-20 18:53:20,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-20 18:53:20,449 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 18:53:20,450 INFO L195 NwaCegarLoop]: 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] [2022-11-20 18:53:20,450 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 18:53:20,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 18:53:20,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1919995639, now seen corresponding path program 1 times [2022-11-20 18:53:20,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 18:53:20,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305000723] [2022-11-20 18:53:20,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:53:20,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 18:53:20,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:53:20,798 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 18:53:20,799 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 18:53:20,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305000723] [2022-11-20 18:53:20,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305000723] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 18:53:20,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 18:53:20,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 18:53:20,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242768288] [2022-11-20 18:53:20,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 18:53:20,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 18:53:20,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 18:53:20,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 18:53:20,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 18:53:20,866 INFO L87 Difference]: Start difference. First operand has 92 states, 62 states have (on average 1.4838709677419355) internal successors, (92), 64 states have internal predecessors, (92), 19 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Second operand has 2 states, 2 states have (on average 12.0) internal successors, (24), 2 states have internal predecessors, (24), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-20 18:53:21,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 18:53:21,016 INFO L93 Difference]: Finished difference Result 150 states and 202 transitions. [2022-11-20 18:53:21,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 18:53:21,020 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 12.0) internal successors, (24), 2 states have internal predecessors, (24), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 48 [2022-11-20 18:53:21,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 18:53:21,033 INFO L225 Difference]: With dead ends: 150 [2022-11-20 18:53:21,033 INFO L226 Difference]: Without dead ends: 89 [2022-11-20 18:53:21,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 18:53:21,044 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 18:53:21,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 105 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 18:53:21,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-11-20 18:53:21,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-11-20 18:53:21,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 60 states have (on average 1.4333333333333333) internal successors, (86), 61 states have internal predecessors, (86), 19 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-20 18:53:21,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 123 transitions. [2022-11-20 18:53:21,118 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 123 transitions. Word has length 48 [2022-11-20 18:53:21,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 18:53:21,120 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 123 transitions. [2022-11-20 18:53:21,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 12.0) internal successors, (24), 2 states have internal predecessors, (24), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-20 18:53:21,121 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 123 transitions. [2022-11-20 18:53:21,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-20 18:53:21,126 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 18:53:21,126 INFO L195 NwaCegarLoop]: 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] [2022-11-20 18:53:21,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 18:53:21,127 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 18:53:21,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 18:53:21,129 INFO L85 PathProgramCache]: Analyzing trace with hash 191482210, now seen corresponding path program 1 times [2022-11-20 18:53:21,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 18:53:21,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693434598] [2022-11-20 18:53:21,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:53:21,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 18:53:21,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:53:21,442 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 18:53:21,443 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 18:53:21,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693434598] [2022-11-20 18:53:21,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693434598] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 18:53:21,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 18:53:21,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 18:53:21,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519023269] [2022-11-20 18:53:21,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 18:53:21,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 18:53:21,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 18:53:21,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 18:53:21,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 18:53:21,448 INFO L87 Difference]: Start difference. First operand 89 states and 123 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-20 18:53:21,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 18:53:21,575 INFO L93 Difference]: Finished difference Result 146 states and 190 transitions. [2022-11-20 18:53:21,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 18:53:21,576 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 49 [2022-11-20 18:53:21,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 18:53:21,579 INFO L225 Difference]: With dead ends: 146 [2022-11-20 18:53:21,581 INFO L226 Difference]: Without dead ends: 91 [2022-11-20 18:53:21,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 18:53:21,585 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 0 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 18:53:21,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 203 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 18:53:21,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-11-20 18:53:21,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-11-20 18:53:21,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 62 states have (on average 1.4193548387096775) internal successors, (88), 63 states have internal predecessors, (88), 19 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-20 18:53:21,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 125 transitions. [2022-11-20 18:53:21,622 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 125 transitions. Word has length 49 [2022-11-20 18:53:21,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 18:53:21,623 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 125 transitions. [2022-11-20 18:53:21,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-20 18:53:21,623 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 125 transitions. [2022-11-20 18:53:21,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-20 18:53:21,627 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 18:53:21,627 INFO L195 NwaCegarLoop]: 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] [2022-11-20 18:53:21,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 18:53:21,629 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 18:53:21,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 18:53:21,630 INFO L85 PathProgramCache]: Analyzing trace with hash -477483680, now seen corresponding path program 1 times [2022-11-20 18:53:21,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 18:53:21,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944370203] [2022-11-20 18:53:21,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:53:21,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 18:53:21,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:53:21,919 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 18:53:21,920 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 18:53:21,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944370203] [2022-11-20 18:53:21,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944370203] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 18:53:21,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104919620] [2022-11-20 18:53:21,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:53:21,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 18:53:21,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea73c08f-1777-454b-ad02-0144115fc5bf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 18:53:21,928 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea73c08f-1777-454b-ad02-0144115fc5bf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 18:53:21,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea73c08f-1777-454b-ad02-0144115fc5bf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 18:53:22,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:53:22,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 18:53:22,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:53:22,386 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 18:53:22,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 18:53:22,506 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 18:53:22,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104919620] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 18:53:22,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [111266549] [2022-11-20 18:53:22,539 INFO L159 IcfgInterpreter]: Started Sifa with 44 locations of interest [2022-11-20 18:53:22,540 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 18:53:22,545 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 18:53:22,551 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 18:53:22,552 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 18:53:32,115 INFO L197 IcfgInterpreter]: Interpreting procedure setClientId with input of size 451 for LOIs [2022-11-20 18:53:32,561 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 18:54:04,185 WARN L233 SmtUtils]: Spent 10.45s on a formula simplification. DAG size of input: 573 DAG size of output: 309 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 18:54:15,403 WARN L233 SmtUtils]: Spent 10.87s on a formula simplification. DAG size of input: 575 DAG size of output: 309 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 18:54:16,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [111266549] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 18:54:16,735 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-20 18:54:16,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [4, 4, 4] total 19 [2022-11-20 18:54:16,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697285067] [2022-11-20 18:54:16,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 18:54:16,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 18:54:16,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 18:54:16,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 18:54:16,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-11-20 18:54:16,739 INFO L87 Difference]: Start difference. First operand 91 states and 125 transitions. Second operand has 14 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-20 18:54:20,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 18:54:20,994 INFO L93 Difference]: Finished difference Result 244 states and 379 transitions. [2022-11-20 18:54:20,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 18:54:20,998 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 53 [2022-11-20 18:54:20,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 18:54:21,002 INFO L225 Difference]: With dead ends: 244 [2022-11-20 18:54:21,002 INFO L226 Difference]: Without dead ends: 165 [2022-11-20 18:54:21,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 44.2s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-11-20 18:54:21,006 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 101 mSDsluCounter, 1337 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 1483 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-20 18:54:21,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 1483 Invalid, 823 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [11 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-11-20 18:54:21,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-11-20 18:54:21,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 112. [2022-11-20 18:54:21,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 83 states have (on average 1.4457831325301205) internal successors, (120), 84 states have internal predecessors, (120), 19 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-20 18:54:21,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 157 transitions. [2022-11-20 18:54:21,081 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 157 transitions. Word has length 53 [2022-11-20 18:54:21,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 18:54:21,082 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 157 transitions. [2022-11-20 18:54:21,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-20 18:54:21,082 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 157 transitions. [2022-11-20 18:54:21,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-20 18:54:21,085 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 18:54:21,085 INFO L195 NwaCegarLoop]: 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] [2022-11-20 18:54:21,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea73c08f-1777-454b-ad02-0144115fc5bf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 18:54:21,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea73c08f-1777-454b-ad02-0144115fc5bf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 18:54:21,293 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 18:54:21,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 18:54:21,294 INFO L85 PathProgramCache]: Analyzing trace with hash -203317183, now seen corresponding path program 1 times [2022-11-20 18:54:21,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 18:54:21,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430297439] [2022-11-20 18:54:21,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:54:21,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 18:54:21,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:54:21,382 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 18:54:21,382 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 18:54:21,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430297439] [2022-11-20 18:54:21,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430297439] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 18:54:21,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 18:54:21,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 18:54:21,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246210410] [2022-11-20 18:54:21,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 18:54:21,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 18:54:21,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 18:54:21,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 18:54:21,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 18:54:21,386 INFO L87 Difference]: Start difference. First operand 112 states and 157 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-20 18:54:21,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 18:54:21,586 INFO L93 Difference]: Finished difference Result 260 states and 379 transitions. [2022-11-20 18:54:21,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 18:54:21,587 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 54 [2022-11-20 18:54:21,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 18:54:21,589 INFO L225 Difference]: With dead ends: 260 [2022-11-20 18:54:21,590 INFO L226 Difference]: Without dead ends: 162 [2022-11-20 18:54:21,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 18:54:21,592 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 46 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 18:54:21,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 200 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 18:54:21,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-11-20 18:54:21,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 157. [2022-11-20 18:54:21,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 128 states have (on average 1.5234375) internal successors, (195), 129 states have internal predecessors, (195), 19 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-20 18:54:21,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 232 transitions. [2022-11-20 18:54:21,720 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 232 transitions. Word has length 54 [2022-11-20 18:54:21,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 18:54:21,720 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 232 transitions. [2022-11-20 18:54:21,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-20 18:54:21,721 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 232 transitions. [2022-11-20 18:54:21,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-20 18:54:21,723 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 18:54:21,723 INFO L195 NwaCegarLoop]: 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] [2022-11-20 18:54:21,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 18:54:21,724 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 18:54:21,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 18:54:21,725 INFO L85 PathProgramCache]: Analyzing trace with hash 321288137, now seen corresponding path program 1 times [2022-11-20 18:54:21,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 18:54:21,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591184139] [2022-11-20 18:54:21,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:54:21,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 18:54:21,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:54:21,926 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 18:54:21,926 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 18:54:21,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591184139] [2022-11-20 18:54:21,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591184139] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 18:54:21,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136199754] [2022-11-20 18:54:21,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:54:21,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 18:54:21,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea73c08f-1777-454b-ad02-0144115fc5bf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 18:54:21,933 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea73c08f-1777-454b-ad02-0144115fc5bf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 18:54:21,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea73c08f-1777-454b-ad02-0144115fc5bf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 18:54:22,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:54:22,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 814 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 18:54:22,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:54:22,298 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 18:54:22,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 18:54:22,357 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 18:54:22,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136199754] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 18:54:22,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1453443757] [2022-11-20 18:54:22,361 INFO L159 IcfgInterpreter]: Started Sifa with 46 locations of interest [2022-11-20 18:54:22,361 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 18:54:22,362 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 18:54:22,362 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 18:54:22,362 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 18:54:36,115 INFO L197 IcfgInterpreter]: Interpreting procedure setClientId with input of size 451 for LOIs [2022-11-20 18:54:36,495 INFO L197 IcfgInterpreter]: Interpreting procedure sendEmail with input of size 249 for LOIs [2022-11-20 18:54:38,289 INFO L197 IcfgInterpreter]: Interpreting procedure outgoing with input of size 251 for LOIs [2022-11-20 18:54:40,991 INFO L197 IcfgInterpreter]: Interpreting procedure getEmailTo with input of size 242 for LOIs [2022-11-20 18:54:41,039 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailTo with input of size 239 for LOIs [2022-11-20 18:54:41,106 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailFrom with input of size 478 for LOIs [2022-11-20 18:54:43,634 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 18:55:28,132 WARN L233 SmtUtils]: Spent 23.02s on a formula simplification. DAG size of input: 584 DAG size of output: 453 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 18:55:42,842 WARN L233 SmtUtils]: Spent 14.40s on a formula simplification. DAG size of input: 586 DAG size of output: 332 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 18:55:53,691 WARN L233 SmtUtils]: Spent 10.56s on a formula simplification. DAG size of input: 558 DAG size of output: 369 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 18:56:04,253 WARN L233 SmtUtils]: Spent 10.25s on a formula simplification. DAG size of input: 556 DAG size of output: 367 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 18:56:24,250 WARN L233 SmtUtils]: Spent 14.68s on a formula simplification. DAG size of input: 478 DAG size of output: 365 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 18:56:56,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1453443757] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 18:56:56,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-20 18:56:56,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [4, 4, 4] total 39 [2022-11-20 18:56:56,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669714776] [2022-11-20 18:56:56,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 18:56:56,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 18:56:56,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 18:56:56,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 18:56:56,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1378, Unknown=0, NotChecked=0, Total=1482 [2022-11-20 18:56:56,272 INFO L87 Difference]: Start difference. First operand 157 states and 232 transitions. Second operand has 34 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 20 states have internal predecessors, (30), 10 states have call successors, (11), 7 states have call predecessors, (11), 5 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-20 18:57:07,822 WARN L233 SmtUtils]: Spent 10.10s on a formula simplification. DAG size of input: 568 DAG size of output: 415 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 18:57:17,729 WARN L233 SmtUtils]: Spent 6.07s on a formula simplification. DAG size of input: 455 DAG size of output: 326 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 18:57:23,851 WARN L233 SmtUtils]: Spent 5.71s on a formula simplification. DAG size of input: 452 DAG size of output: 324 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 18:57:40,305 WARN L233 SmtUtils]: Spent 12.12s on a formula simplification. DAG size of input: 527 DAG size of output: 446 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 18:57:54,902 WARN L233 SmtUtils]: Spent 13.93s on a formula simplification. DAG size of input: 594 DAG size of output: 448 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 18:58:02,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 18:58:02,233 INFO L93 Difference]: Finished difference Result 399 states and 634 transitions. [2022-11-20 18:58:02,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-20 18:58:02,234 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 20 states have internal predecessors, (30), 10 states have call successors, (11), 7 states have call predecessors, (11), 5 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 55 [2022-11-20 18:58:02,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 18:58:02,236 INFO L225 Difference]: With dead ends: 399 [2022-11-20 18:58:02,237 INFO L226 Difference]: Without dead ends: 297 [2022-11-20 18:58:02,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 189.1s TimeCoverageRelationStatistics Valid=166, Invalid=1904, Unknown=0, NotChecked=0, Total=2070 [2022-11-20 18:58:02,240 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 242 mSDsluCounter, 2022 mSDsCounter, 0 mSdLazyCounter, 2002 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 2137 SdHoareTripleChecker+Invalid, 2022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 2002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2022-11-20 18:58:02,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 2137 Invalid, 2022 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [20 Valid, 2002 Invalid, 0 Unknown, 0 Unchecked, 9.0s Time] [2022-11-20 18:58:02,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-11-20 18:58:02,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 184. [2022-11-20 18:58:02,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 146 states have (on average 1.4931506849315068) internal successors, (218), 147 states have internal predecessors, (218), 25 states have call successors, (25), 14 states have call predecessors, (25), 12 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-11-20 18:58:02,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 267 transitions. [2022-11-20 18:58:02,486 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 267 transitions. Word has length 55 [2022-11-20 18:58:02,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 18:58:02,487 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 267 transitions. [2022-11-20 18:58:02,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 20 states have internal predecessors, (30), 10 states have call successors, (11), 7 states have call predecessors, (11), 5 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-20 18:58:02,488 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 267 transitions. [2022-11-20 18:58:02,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-20 18:58:02,494 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 18:58:02,494 INFO L195 NwaCegarLoop]: 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] [2022-11-20 18:58:02,501 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea73c08f-1777-454b-ad02-0144115fc5bf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-20 18:58:02,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea73c08f-1777-454b-ad02-0144115fc5bf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 18:58:02,695 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 18:58:02,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 18:58:02,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1772375298, now seen corresponding path program 1 times [2022-11-20 18:58:02,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 18:58:02,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267726772] [2022-11-20 18:58:02,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:58:02,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 18:58:02,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:58:02,817 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 18:58:02,817 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 18:58:02,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267726772] [2022-11-20 18:58:02,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267726772] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 18:58:02,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342102515] [2022-11-20 18:58:02,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:58:02,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 18:58:02,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea73c08f-1777-454b-ad02-0144115fc5bf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 18:58:02,820 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea73c08f-1777-454b-ad02-0144115fc5bf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 18:58:02,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea73c08f-1777-454b-ad02-0144115fc5bf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 18:58:03,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:58:03,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 813 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 18:58:03,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:58:03,111 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 18:58:03,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 18:58:03,171 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 18:58:03,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342102515] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 18:58:03,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1164593973] [2022-11-20 18:58:03,175 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2022-11-20 18:58:03,176 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 18:58:03,176 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 18:58:03,177 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 18:58:03,177 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 18:58:13,550 INFO L197 IcfgInterpreter]: Interpreting procedure setClientId with input of size 451 for LOIs [2022-11-20 18:58:13,907 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 18:58:53,327 WARN L233 SmtUtils]: Spent 20.68s on a formula simplification. DAG size of input: 581 DAG size of output: 448 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 18:59:02,686 WARN L233 SmtUtils]: Spent 9.09s on a formula simplification. DAG size of input: 583 DAG size of output: 313 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 18:59:13,715 WARN L233 SmtUtils]: Spent 10.80s on a formula simplification. DAG size of input: 570 DAG size of output: 416 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 18:59:23,945 WARN L233 SmtUtils]: Spent 9.96s on a formula simplification. DAG size of input: 568 DAG size of output: 425 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 18:59:34,315 WARN L233 SmtUtils]: Spent 10.10s on a formula simplification. DAG size of input: 568 DAG size of output: 421 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 18:59:44,494 WARN L233 SmtUtils]: Spent 9.89s on a formula simplification. DAG size of input: 566 DAG size of output: 419 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 18:59:45,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1164593973] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 18:59:45,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-20 18:59:45,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [4, 4, 4] total 23 [2022-11-20 18:59:45,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430858318] [2022-11-20 18:59:45,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 18:59:45,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 18:59:45,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 18:59:45,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 18:59:45,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-11-20 18:59:45,693 INFO L87 Difference]: Start difference. First operand 184 states and 267 transitions. Second operand has 18 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-20 18:59:48,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 18:59:48,898 INFO L93 Difference]: Finished difference Result 414 states and 652 transitions. [2022-11-20 18:59:48,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 18:59:48,900 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 57 [2022-11-20 18:59:48,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 18:59:48,902 INFO L225 Difference]: With dead ends: 414 [2022-11-20 18:59:48,903 INFO L226 Difference]: Without dead ends: 312 [2022-11-20 18:59:48,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 91.8s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-11-20 18:59:48,904 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 138 mSDsluCounter, 818 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 923 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-20 18:59:48,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 923 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-20 18:59:48,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-11-20 18:59:49,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 194. [2022-11-20 18:59:49,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 156 states have (on average 1.4935897435897436) internal successors, (233), 157 states have internal predecessors, (233), 25 states have call successors, (25), 14 states have call predecessors, (25), 12 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-11-20 18:59:49,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 282 transitions. [2022-11-20 18:59:49,070 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 282 transitions. Word has length 57 [2022-11-20 18:59:49,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 18:59:49,071 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 282 transitions. [2022-11-20 18:59:49,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-20 18:59:49,071 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 282 transitions. [2022-11-20 18:59:49,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-20 18:59:49,072 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 18:59:49,073 INFO L195 NwaCegarLoop]: 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] [2022-11-20 18:59:49,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea73c08f-1777-454b-ad02-0144115fc5bf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 18:59:49,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea73c08f-1777-454b-ad02-0144115fc5bf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-20 18:59:49,277 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 18:59:49,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 18:59:49,277 INFO L85 PathProgramCache]: Analyzing trace with hash -789181693, now seen corresponding path program 1 times [2022-11-20 18:59:49,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 18:59:49,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489395925] [2022-11-20 18:59:49,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:59:49,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 18:59:49,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:59:49,432 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 18:59:49,432 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 18:59:49,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489395925] [2022-11-20 18:59:49,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489395925] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 18:59:49,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025061417] [2022-11-20 18:59:49,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:59:49,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 18:59:49,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea73c08f-1777-454b-ad02-0144115fc5bf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 18:59:49,434 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea73c08f-1777-454b-ad02-0144115fc5bf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 18:59:49,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea73c08f-1777-454b-ad02-0144115fc5bf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 18:59:49,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:59:49,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 820 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 18:59:49,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:59:49,705 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 18:59:49,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 18:59:49,764 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 18:59:49,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025061417] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 18:59:49,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [682472512] [2022-11-20 18:59:49,767 INFO L159 IcfgInterpreter]: Started Sifa with 46 locations of interest [2022-11-20 18:59:49,767 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 18:59:49,767 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 18:59:49,768 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 18:59:49,768 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 19:00:02,159 INFO L197 IcfgInterpreter]: Interpreting procedure setClientId with input of size 453 for LOIs [2022-11-20 19:00:02,472 INFO L197 IcfgInterpreter]: Interpreting procedure sendEmail with input of size 249 for LOIs [2022-11-20 19:00:03,918 INFO L197 IcfgInterpreter]: Interpreting procedure outgoing with input of size 249 for LOIs [2022-11-20 19:00:07,201 INFO L197 IcfgInterpreter]: Interpreting procedure getEmailTo with input of size 242 for LOIs [2022-11-20 19:00:07,237 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailTo with input of size 239 for LOIs [2022-11-20 19:00:07,285 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailFrom with input of size 478 for LOIs [2022-11-20 19:00:12,402 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 19:00:23,768 WARN L233 SmtUtils]: Spent 5.03s on a formula simplification. DAG size of input: 453 DAG size of output: 245 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:00:29,161 WARN L233 SmtUtils]: Spent 5.24s on a formula simplification. DAG size of input: 476 DAG size of output: 265 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:00:43,827 WARN L233 SmtUtils]: Spent 6.71s on a formula simplification. DAG size of input: 558 DAG size of output: 355 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:01:02,221 WARN L233 SmtUtils]: Spent 13.89s on a formula simplification. DAG size of input: 478 DAG size of output: 365 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:01:09,540 WARN L233 SmtUtils]: Spent 6.83s on a formula simplification. DAG size of input: 500 DAG size of output: 257 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:01:35,578 WARN L233 SmtUtils]: Spent 7.84s on a formula simplification. DAG size of input: 506 DAG size of output: 391 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:01:45,146 WARN L233 SmtUtils]: Spent 8.96s on a formula simplification. DAG size of input: 570 DAG size of output: 434 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:01:54,758 WARN L233 SmtUtils]: Spent 8.99s on a formula simplification. DAG size of input: 571 DAG size of output: 433 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:02:04,819 WARN L233 SmtUtils]: Spent 9.40s on a formula simplification. DAG size of input: 604 DAG size of output: 446 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:02:04,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [682472512] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:02:04,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-20 19:02:04,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [6, 5, 5] total 44 [2022-11-20 19:02:04,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569854654] [2022-11-20 19:02:04,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:02:04,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-20 19:02:04,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:02:04,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-20 19:02:04,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1771, Unknown=0, NotChecked=0, Total=1892 [2022-11-20 19:02:04,825 INFO L87 Difference]: Start difference. First operand 194 states and 282 transitions. Second operand has 36 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (11), 7 states have call predecessors, (11), 5 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-20 19:02:41,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:02:41,577 INFO L93 Difference]: Finished difference Result 524 states and 852 transitions. [2022-11-20 19:02:41,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-20 19:02:41,578 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (11), 7 states have call predecessors, (11), 5 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 58 [2022-11-20 19:02:41,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:02:41,580 INFO L225 Difference]: With dead ends: 524 [2022-11-20 19:02:41,580 INFO L226 Difference]: Without dead ends: 405 [2022-11-20 19:02:41,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 135 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 138.1s TimeCoverageRelationStatistics Valid=193, Invalid=2563, Unknown=0, NotChecked=0, Total=2756 [2022-11-20 19:02:41,582 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 247 mSDsluCounter, 1996 mSDsCounter, 0 mSdLazyCounter, 2782 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 2111 SdHoareTripleChecker+Invalid, 2817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 2782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2022-11-20 19:02:41,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 2111 Invalid, 2817 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [35 Valid, 2782 Invalid, 0 Unknown, 0 Unchecked, 10.4s Time] [2022-11-20 19:02:41,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2022-11-20 19:02:41,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 295. [2022-11-20 19:02:41,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 247 states have (on average 1.5587044534412955) internal successors, (385), 249 states have internal predecessors, (385), 31 states have call successors, (31), 19 states have call predecessors, (31), 16 states have return successors, (31), 26 states have call predecessors, (31), 30 states have call successors, (31) [2022-11-20 19:02:41,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 447 transitions. [2022-11-20 19:02:41,890 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 447 transitions. Word has length 58 [2022-11-20 19:02:41,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:02:41,890 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 447 transitions. [2022-11-20 19:02:41,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (11), 7 states have call predecessors, (11), 5 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-20 19:02:41,891 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 447 transitions. [2022-11-20 19:02:41,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-20 19:02:41,892 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:02:41,893 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:02:41,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea73c08f-1777-454b-ad02-0144115fc5bf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 19:02:42,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea73c08f-1777-454b-ad02-0144115fc5bf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-20 19:02:42,100 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:02:42,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:02:42,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1393893186, now seen corresponding path program 1 times [2022-11-20 19:02:42,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:02:42,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314062136] [2022-11-20 19:02:42,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:02:42,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:02:42,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:02:42,260 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 19:02:42,261 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:02:42,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314062136] [2022-11-20 19:02:42,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314062136] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:02:42,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510480255] [2022-11-20 19:02:42,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:02:42,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:02:42,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea73c08f-1777-454b-ad02-0144115fc5bf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:02:42,263 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea73c08f-1777-454b-ad02-0144115fc5bf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:02:42,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea73c08f-1777-454b-ad02-0144115fc5bf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 19:02:42,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:02:42,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 890 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 19:02:42,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:02:42,571 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-20 19:02:42,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:02:42,657 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-20 19:02:42,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510480255] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:02:42,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1291085035] [2022-11-20 19:02:42,665 INFO L159 IcfgInterpreter]: Started Sifa with 55 locations of interest [2022-11-20 19:02:42,665 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 19:02:42,665 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 19:02:42,665 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 19:02:42,666 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 19:02:54,965 INFO L197 IcfgInterpreter]: Interpreting procedure setClientId with input of size 451 for LOIs [2022-11-20 19:02:55,275 INFO L197 IcfgInterpreter]: Interpreting procedure sendEmail with input of size 249 for LOIs [2022-11-20 19:02:56,780 INFO L197 IcfgInterpreter]: Interpreting procedure outgoing with input of size 249 for LOIs [2022-11-20 19:03:22,531 INFO L197 IcfgInterpreter]: Interpreting procedure queue with input of size 455 for LOIs [2022-11-20 19:03:22,837 INFO L197 IcfgInterpreter]: Interpreting procedure getEmailFrom with input of size 446 for LOIs [2022-11-20 19:03:23,109 INFO L197 IcfgInterpreter]: Interpreting procedure getEmailTo with input of size 242 for LOIs [2022-11-20 19:03:23,145 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailTo with input of size 477 for LOIs [2022-11-20 19:03:25,018 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailFrom with input of size 478 for LOIs [2022-11-20 19:03:26,848 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 19:03:58,101 WARN L233 SmtUtils]: Spent 7.27s on a formula simplification. DAG size of input: 558 DAG size of output: 355 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:04:09,475 WARN L233 SmtUtils]: Spent 6.34s on a formula simplification. DAG size of input: 478 DAG size of output: 249 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:04:39,436 WARN L233 SmtUtils]: Spent 22.21s on a formula simplification. DAG size of input: 477 DAG size of output: 364 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:05:07,821 WARN L233 SmtUtils]: Spent 8.20s on a formula simplification. DAG size of input: 506 DAG size of output: 391 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:05:17,837 WARN L233 SmtUtils]: Spent 9.32s on a formula simplification. DAG size of input: 570 DAG size of output: 434 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:05:29,100 WARN L233 SmtUtils]: Spent 10.66s on a formula simplification. DAG size of input: 580 DAG size of output: 444 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:05:51,833 WARN L233 SmtUtils]: Spent 8.07s on a formula simplification. DAG size of input: 593 DAG size of output: 376 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:06:11,791 WARN L233 SmtUtils]: Spent 9.39s on a formula simplification. DAG size of input: 596 DAG size of output: 382 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:06:24,792 WARN L233 SmtUtils]: Spent 11.37s on a formula simplification. DAG size of input: 629 DAG size of output: 484 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:06:24,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1291085035] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:06:24,798 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-20 19:06:24,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [6, 5, 5] total 52 [2022-11-20 19:06:24,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800930855] [2022-11-20 19:06:24,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:06:24,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-20 19:06:24,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:06:24,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-20 19:06:24,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=2513, Unknown=0, NotChecked=0, Total=2652 [2022-11-20 19:06:24,801 INFO L87 Difference]: Start difference. First operand 295 states and 447 transitions. Second operand has 44 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 13 states have call successors, (14), 9 states have call predecessors, (14), 7 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12)