./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 aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e23527-5729-487c-b7f6-fba580f3c529/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e23527-5729-487c-b7f6-fba580f3c529/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e23527-5729-487c-b7f6-fba580f3c529/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e23527-5729-487c-b7f6-fba580f3c529/bin/utaipan-EQgc7hIp5V/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_07e23527-5729-487c-b7f6-fba580f3c529/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e23527-5729-487c-b7f6-fba580f3c529/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ac360da941eb2bc713d1cdb41b6939d6a50ea394a41fda87a7330709a6b33058 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:19:27,676 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:19:27,679 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:19:27,734 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:19:27,735 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:19:27,739 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:19:27,741 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:19:27,746 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:19:27,748 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:19:27,754 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:19:27,756 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:19:27,758 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:19:27,758 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:19:27,761 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:19:27,763 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:19:27,771 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:19:27,773 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:19:27,775 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:19:27,777 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:19:27,786 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:19:27,788 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:19:27,790 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:19:27,793 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:19:27,795 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:19:27,804 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:19:27,805 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:19:27,805 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:19:27,807 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:19:27,808 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:19:27,810 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:19:27,810 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:19:27,811 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:19:27,814 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:19:27,815 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:19:27,817 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:19:27,817 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:19:27,818 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:19:27,818 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:19:27,818 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:19:27,819 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:19:27,820 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:19:27,821 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e23527-5729-487c-b7f6-fba580f3c529/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 02:19:27,867 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:19:27,867 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:19:27,868 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:19:27,868 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:19:27,876 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:19:27,876 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:19:27,876 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:19:27,876 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:19:27,877 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:19:27,877 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:19:27,878 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:19:27,878 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:19:27,879 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:19:27,879 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:19:27,879 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:19:27,879 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:19:27,880 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:19:27,880 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:19:27,881 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:19:27,881 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:19:27,881 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:19:27,881 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:19:27,882 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:19:27,882 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:19:27,882 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:19:27,882 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:19:27,884 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:19:27,884 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:19:27,884 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:19:27,885 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:19:27,885 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:19:27,885 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:19:27,885 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:19:27,886 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:19:27,886 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:19:27,886 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:19:27,887 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:19:27,887 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:19:27,887 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:19:27,887 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:19:27,887 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:19:27,888 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e23527-5729-487c-b7f6-fba580f3c529/bin/utaipan-EQgc7hIp5V/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e23527-5729-487c-b7f6-fba580f3c529/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac360da941eb2bc713d1cdb41b6939d6a50ea394a41fda87a7330709a6b33058 [2021-11-23 02:19:28,195 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:19:28,230 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:19:28,233 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:19:28,234 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:19:28,235 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:19:28,236 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e23527-5729-487c-b7f6-fba580f3c529/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/product-lines/email_spec0_product10.cil.c [2021-11-23 02:19:28,303 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e23527-5729-487c-b7f6-fba580f3c529/bin/utaipan-EQgc7hIp5V/data/9eff874e0/4c9503d64db54618b6cd8383eb50ba26/FLAG029996d00 [2021-11-23 02:19:28,923 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:19:28,924 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e23527-5729-487c-b7f6-fba580f3c529/sv-benchmarks/c/product-lines/email_spec0_product10.cil.c [2021-11-23 02:19:28,965 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e23527-5729-487c-b7f6-fba580f3c529/bin/utaipan-EQgc7hIp5V/data/9eff874e0/4c9503d64db54618b6cd8383eb50ba26/FLAG029996d00 [2021-11-23 02:19:29,164 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e23527-5729-487c-b7f6-fba580f3c529/bin/utaipan-EQgc7hIp5V/data/9eff874e0/4c9503d64db54618b6cd8383eb50ba26 [2021-11-23 02:19:29,168 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:19:29,170 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:19:29,174 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:19:29,174 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:19:29,178 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:19:29,178 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:19:29" (1/1) ... [2021-11-23 02:19:29,181 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63c2fc9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:19:29, skipping insertion in model container [2021-11-23 02:19:29,181 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:19:29" (1/1) ... [2021-11-23 02:19:29,189 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:19:29,269 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:19:29,501 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e23527-5729-487c-b7f6-fba580f3c529/sv-benchmarks/c/product-lines/email_spec0_product10.cil.c[2842,2855] [2021-11-23 02:19:29,858 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:19:29,875 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:19:29,898 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e23527-5729-487c-b7f6-fba580f3c529/sv-benchmarks/c/product-lines/email_spec0_product10.cil.c[2842,2855] [2021-11-23 02:19:29,976 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:19:30,013 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:19:30,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:19:30 WrapperNode [2021-11-23 02:19:30,014 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:19:30,015 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:19:30,015 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:19:30,015 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:19:30,024 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:19:30" (1/1) ... [2021-11-23 02:19:30,050 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:19:30" (1/1) ... [2021-11-23 02:19:30,107 INFO L137 Inliner]: procedures = 110, calls = 135, calls flagged for inlining = 40, calls inlined = 33, statements flattened = 617 [2021-11-23 02:19:30,107 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:19:30,108 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:19:30,108 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:19:30,108 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:19:30,119 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:19:30" (1/1) ... [2021-11-23 02:19:30,119 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:19:30" (1/1) ... [2021-11-23 02:19:30,124 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:19:30" (1/1) ... [2021-11-23 02:19:30,124 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:19:30" (1/1) ... [2021-11-23 02:19:30,142 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:19:30" (1/1) ... [2021-11-23 02:19:30,150 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:19:30" (1/1) ... [2021-11-23 02:19:30,153 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:19:30" (1/1) ... [2021-11-23 02:19:30,159 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:19:30,160 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:19:30,160 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:19:30,161 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:19:30,162 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:19:30" (1/1) ... [2021-11-23 02:19:30,173 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:19:30,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e23527-5729-487c-b7f6-fba580f3c529/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:19:30,216 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e23527-5729-487c-b7f6-fba580f3c529/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:19:30,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e23527-5729-487c-b7f6-fba580f3c529/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:19:30,287 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailTo [2021-11-23 02:19:30,287 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailTo [2021-11-23 02:19:30,288 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailFrom [2021-11-23 02:19:30,288 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailFrom [2021-11-23 02:19:30,288 INFO L130 BoogieDeclarations]: Found specification of procedure isReadable [2021-11-23 02:19:30,288 INFO L138 BoogieDeclarations]: Found implementation of procedure isReadable [2021-11-23 02:19:30,288 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-23 02:19:30,288 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailFrom [2021-11-23 02:19:30,288 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailFrom [2021-11-23 02:19:30,288 INFO L130 BoogieDeclarations]: Found specification of procedure queue [2021-11-23 02:19:30,288 INFO L138 BoogieDeclarations]: Found implementation of procedure queue [2021-11-23 02:19:30,289 INFO L130 BoogieDeclarations]: Found specification of procedure setClientId [2021-11-23 02:19:30,289 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientId [2021-11-23 02:19:30,289 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:19:30,289 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing [2021-11-23 02:19:30,289 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing [2021-11-23 02:19:30,289 INFO L130 BoogieDeclarations]: Found specification of procedure sendEmail [2021-11-23 02:19:30,289 INFO L138 BoogieDeclarations]: Found implementation of procedure sendEmail [2021-11-23 02:19:30,289 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailTo [2021-11-23 02:19:30,289 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailTo [2021-11-23 02:19:30,290 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:19:30,290 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:19:30,290 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:19:30,457 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:19:30,459 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:19:31,021 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:19:31,217 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:19:31,217 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 02:19:31,220 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:19:31 BoogieIcfgContainer [2021-11-23 02:19:31,220 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:19:31,222 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:19:31,222 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:19:31,225 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:19:31,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:19:29" (1/3) ... [2021-11-23 02:19:31,228 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53d82a77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:19:31, skipping insertion in model container [2021-11-23 02:19:31,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:19:30" (2/3) ... [2021-11-23 02:19:31,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53d82a77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:19:31, skipping insertion in model container [2021-11-23 02:19:31,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:19:31" (3/3) ... [2021-11-23 02:19:31,230 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec0_product10.cil.c [2021-11-23 02:19:31,236 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:19:31,236 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:19:31,288 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:19:31,300 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 02:19:31,301 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:19:31,329 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) [2021-11-23 02:19:31,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-23 02:19:31,338 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:19:31,338 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:19:31,339 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:19:31,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:19:31,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1919995639, now seen corresponding path program 1 times [2021-11-23 02:19:31,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:19:31,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076435573] [2021-11-23 02:19:31,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:19:31,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:19:31,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:19:31,685 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:19:31,685 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:19:31,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076435573] [2021-11-23 02:19:31,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076435573] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:19:31,687 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:19:31,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:19:31,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149763039] [2021-11-23 02:19:31,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:19:31,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 02:19:31,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:19:31,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 02:19:31,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 02:19:31,731 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) [2021-11-23 02:19:31,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:19:31,854 INFO L93 Difference]: Finished difference Result 150 states and 202 transitions. [2021-11-23 02:19:31,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 02:19:31,857 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 [2021-11-23 02:19:31,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:19:31,869 INFO L225 Difference]: With dead ends: 150 [2021-11-23 02:19:31,869 INFO L226 Difference]: Without dead ends: 89 [2021-11-23 02:19:31,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 02:19:31,876 INFO L933 BasicCegarLoop]: 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 [2021-11-23 02:19:31,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 105 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:19:31,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-23 02:19:31,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-11-23 02:19:31,923 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) [2021-11-23 02:19:31,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 123 transitions. [2021-11-23 02:19:31,928 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 123 transitions. Word has length 48 [2021-11-23 02:19:31,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:19:31,930 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 123 transitions. [2021-11-23 02:19:31,930 INFO L471 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) [2021-11-23 02:19:31,931 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 123 transitions. [2021-11-23 02:19:31,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-23 02:19:31,934 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:19:31,935 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:19:31,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:19:31,935 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:19:31,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:19:31,937 INFO L85 PathProgramCache]: Analyzing trace with hash 191482210, now seen corresponding path program 1 times [2021-11-23 02:19:31,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:19:31,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33444645] [2021-11-23 02:19:31,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:19:31,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:19:31,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:19:32,063 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:19:32,063 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:19:32,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33444645] [2021-11-23 02:19:32,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33444645] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:19:32,065 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:19:32,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:19:32,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127826696] [2021-11-23 02:19:32,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:19:32,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:19:32,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:19:32,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:19:32,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:19:32,074 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) [2021-11-23 02:19:32,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:19:32,191 INFO L93 Difference]: Finished difference Result 146 states and 190 transitions. [2021-11-23 02:19:32,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:19:32,192 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 [2021-11-23 02:19:32,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:19:32,194 INFO L225 Difference]: With dead ends: 146 [2021-11-23 02:19:32,197 INFO L226 Difference]: Without dead ends: 91 [2021-11-23 02:19:32,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:19:32,201 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 0 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2021-11-23 02:19:32,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 203 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:19:32,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-23 02:19:32,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2021-11-23 02:19:32,221 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) [2021-11-23 02:19:32,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 125 transitions. [2021-11-23 02:19:32,228 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 125 transitions. Word has length 49 [2021-11-23 02:19:32,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:19:32,229 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 125 transitions. [2021-11-23 02:19:32,230 INFO L471 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) [2021-11-23 02:19:32,231 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 125 transitions. [2021-11-23 02:19:32,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-23 02:19:32,234 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:19:32,235 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:19:32,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:19:32,235 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:19:32,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:19:32,236 INFO L85 PathProgramCache]: Analyzing trace with hash -477483680, now seen corresponding path program 1 times [2021-11-23 02:19:32,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:19:32,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624243608] [2021-11-23 02:19:32,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:19:32,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:19:32,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:19:32,392 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:19:32,392 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:19:32,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624243608] [2021-11-23 02:19:32,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624243608] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:19:32,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562429380] [2021-11-23 02:19:32,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:19:32,394 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:19:32,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e23527-5729-487c-b7f6-fba580f3c529/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:19:32,399 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e23527-5729-487c-b7f6-fba580f3c529/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:19:32,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e23527-5729-487c-b7f6-fba580f3c529/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:19:32,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:19:32,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:19:32,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:19:32,882 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:19:32,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:19:33,055 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:19:33,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562429380] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:19:33,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [280582241] [2021-11-23 02:19:33,089 INFO L159 IcfgInterpreter]: Started Sifa with 44 locations of interest [2021-11-23 02:19:33,089 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:19:33,094 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:19:33,100 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:19:33,101 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:19:41,515 INFO L197 IcfgInterpreter]: Interpreting procedure setClientId with input of size 451 for LOIs [2021-11-23 02:19:41,840 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:20:07,623 WARN L227 SmtUtils]: Spent 10.57s on a formula simplification. DAG size of input: 573 DAG size of output: 309 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:20:19,442 WARN L227 SmtUtils]: Spent 10.69s on a formula simplification. DAG size of input: 575 DAG size of output: 309 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:20:20,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [280582241] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:20:20,294 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:20:20,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [4, 4, 4] total 19 [2021-11-23 02:20:20,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675668451] [2021-11-23 02:20:20,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:20:20,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 02:20:20,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:20:20,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 02:20:20,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-11-23 02:20:20,298 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) [2021-11-23 02:20:23,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:20:23,485 INFO L93 Difference]: Finished difference Result 244 states and 379 transitions. [2021-11-23 02:20:23,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 02:20:23,487 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 [2021-11-23 02:20:23,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:20:23,500 INFO L225 Difference]: With dead ends: 244 [2021-11-23 02:20:23,500 INFO L226 Difference]: Without dead ends: 165 [2021-11-23 02:20:23,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 38.5s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-11-23 02:20:23,508 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 99 mSDsluCounter, 1391 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 1483 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:20:23,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 1483 Invalid, 825 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [13 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-23 02:20:23,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-11-23 02:20:23,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 112. [2021-11-23 02:20:23,579 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) [2021-11-23 02:20:23,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 157 transitions. [2021-11-23 02:20:23,580 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 157 transitions. Word has length 53 [2021-11-23 02:20:23,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:20:23,581 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 157 transitions. [2021-11-23 02:20:23,581 INFO L471 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) [2021-11-23 02:20:23,582 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 157 transitions. [2021-11-23 02:20:23,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-23 02:20:23,591 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:20:23,591 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:20:23,622 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e23527-5729-487c-b7f6-fba580f3c529/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-23 02:20:23,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e23527-5729-487c-b7f6-fba580f3c529/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:20:23,819 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:20:23,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:20:23,820 INFO L85 PathProgramCache]: Analyzing trace with hash -203317183, now seen corresponding path program 1 times [2021-11-23 02:20:23,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:20:23,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695344174] [2021-11-23 02:20:23,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:20:23,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:20:23,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:20:23,882 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:20:23,883 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:20:23,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695344174] [2021-11-23 02:20:23,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695344174] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:20:23,883 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:20:23,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:20:23,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321809247] [2021-11-23 02:20:23,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:20:23,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:20:23,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:20:23,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:20:23,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:20:23,886 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) [2021-11-23 02:20:23,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:20:23,987 INFO L93 Difference]: Finished difference Result 260 states and 379 transitions. [2021-11-23 02:20:23,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:20:23,988 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 [2021-11-23 02:20:23,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:20:23,991 INFO L225 Difference]: With dead ends: 260 [2021-11-23 02:20:23,991 INFO L226 Difference]: Without dead ends: 162 [2021-11-23 02:20:23,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:20:23,994 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 46 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:20:23,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 200 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:20:24,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-11-23 02:20:24,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 157. [2021-11-23 02:20:24,062 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) [2021-11-23 02:20:24,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 232 transitions. [2021-11-23 02:20:24,063 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 232 transitions. Word has length 54 [2021-11-23 02:20:24,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:20:24,064 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 232 transitions. [2021-11-23 02:20:24,064 INFO L471 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) [2021-11-23 02:20:24,064 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 232 transitions. [2021-11-23 02:20:24,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-23 02:20:24,066 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:20:24,066 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:20:24,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 02:20:24,067 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:20:24,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:20:24,067 INFO L85 PathProgramCache]: Analyzing trace with hash 321288137, now seen corresponding path program 1 times [2021-11-23 02:20:24,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:20:24,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732073928] [2021-11-23 02:20:24,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:20:24,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:20:24,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:20:24,130 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:20:24,130 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:20:24,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732073928] [2021-11-23 02:20:24,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732073928] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:20:24,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985287082] [2021-11-23 02:20:24,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:20:24,131 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:20:24,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e23527-5729-487c-b7f6-fba580f3c529/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:20:24,133 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e23527-5729-487c-b7f6-fba580f3c529/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:20:24,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e23527-5729-487c-b7f6-fba580f3c529/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:20:24,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:20:24,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 814 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:20:24,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:20:24,457 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:20:24,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:20:24,588 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:20:24,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985287082] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:20:24,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [289097407] [2021-11-23 02:20:24,592 INFO L159 IcfgInterpreter]: Started Sifa with 46 locations of interest [2021-11-23 02:20:24,592 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:20:24,593 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:20:24,593 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:20:24,593 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:20:40,443 INFO L197 IcfgInterpreter]: Interpreting procedure setClientId with input of size 451 for LOIs [2021-11-23 02:20:40,698 INFO L197 IcfgInterpreter]: Interpreting procedure sendEmail with input of size 465 for LOIs [2021-11-23 02:20:58,563 INFO L197 IcfgInterpreter]: Interpreting procedure outgoing with input of size 463 for LOIs [2021-11-23 02:21:03,066 INFO L197 IcfgInterpreter]: Interpreting procedure getEmailTo with input of size 242 for LOIs [2021-11-23 02:21:03,108 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailTo with input of size 455 for LOIs [2021-11-23 02:21:03,360 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailFrom with input of size 239 for LOIs [2021-11-23 02:21:03,468 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:21:29,979 WARN L227 SmtUtils]: Spent 12.06s on a formula simplification. DAG size of input: 584 DAG size of output: 331 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:21:43,235 WARN L227 SmtUtils]: Spent 12.19s on a formula simplification. DAG size of input: 586 DAG size of output: 333 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:21:56,351 WARN L227 SmtUtils]: Spent 5.10s on a formula simplification. DAG size of input: 554 DAG size of output: 346 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:22:25,738 WARN L227 SmtUtils]: Spent 5.47s on a formula simplification. DAG size of input: 503 DAG size of output: 335 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:22:49,706 WARN L227 SmtUtils]: Spent 5.16s on a formula simplification. DAG size of input: 566 DAG size of output: 368 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:22:49,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [289097407] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:22:49,708 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:22:49,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [4, 4, 4] total 39 [2021-11-23 02:22:49,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230710567] [2021-11-23 02:22:49,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:22:49,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-23 02:22:49,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:22:49,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-23 02:22:49,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1379, Unknown=0, NotChecked=0, Total=1482 [2021-11-23 02:22:49,711 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) [2021-11-23 02:23:09,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:23:09,332 INFO L93 Difference]: Finished difference Result 399 states and 634 transitions. [2021-11-23 02:23:09,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-23 02:23:09,333 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 [2021-11-23 02:23:09,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:23:09,340 INFO L225 Difference]: With dead ends: 399 [2021-11-23 02:23:09,340 INFO L226 Difference]: Without dead ends: 297 [2021-11-23 02:23:09,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 120.6s TimeCoverageRelationStatistics Valid=165, Invalid=1905, Unknown=0, NotChecked=0, Total=2070 [2021-11-23 02:23:09,343 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 239 mSDsluCounter, 2130 mSDsCounter, 0 mSdLazyCounter, 2028 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 2164 SdHoareTripleChecker+Invalid, 2049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 2028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:23:09,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 2164 Invalid, 2049 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [21 Valid, 2028 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2021-11-23 02:23:09,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-11-23 02:23:09,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 184. [2021-11-23 02:23:09,461 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) [2021-11-23 02:23:09,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 267 transitions. [2021-11-23 02:23:09,463 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 267 transitions. Word has length 55 [2021-11-23 02:23:09,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:23:09,464 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 267 transitions. [2021-11-23 02:23:09,464 INFO L471 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) [2021-11-23 02:23:09,464 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 267 transitions. [2021-11-23 02:23:09,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-23 02:23:09,466 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:23:09,467 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:23:09,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e23527-5729-487c-b7f6-fba580f3c529/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:23:09,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e23527-5729-487c-b7f6-fba580f3c529/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:23:09,684 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:23:09,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:23:09,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1772375298, now seen corresponding path program 1 times [2021-11-23 02:23:09,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:23:09,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328255760] [2021-11-23 02:23:09,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:23:09,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:23:09,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:23:09,774 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:23:09,775 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:23:09,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328255760] [2021-11-23 02:23:09,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328255760] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:23:09,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752861336] [2021-11-23 02:23:09,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:23:09,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:23:09,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e23527-5729-487c-b7f6-fba580f3c529/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:23:09,778 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e23527-5729-487c-b7f6-fba580f3c529/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:23:09,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e23527-5729-487c-b7f6-fba580f3c529/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 02:23:09,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:23:09,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 813 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:23:09,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:23:10,037 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:23:10,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:23:10,130 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:23:10,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752861336] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:23:10,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [679904259] [2021-11-23 02:23:10,133 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2021-11-23 02:23:10,134 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:23:10,134 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:23:10,134 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:23:10,135 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:23:18,253 INFO L197 IcfgInterpreter]: Interpreting procedure setClientId with input of size 451 for LOIs [2021-11-23 02:23:18,506 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:23:51,662 WARN L227 SmtUtils]: Spent 18.77s on a formula simplification. DAG size of input: 581 DAG size of output: 448 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:24:04,003 WARN L227 SmtUtils]: Spent 11.06s on a formula simplification. DAG size of input: 583 DAG size of output: 313 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:24:13,075 WARN L227 SmtUtils]: Spent 8.63s on a formula simplification. DAG size of input: 570 DAG size of output: 416 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:24:21,248 WARN L227 SmtUtils]: Spent 7.90s on a formula simplification. DAG size of input: 568 DAG size of output: 425 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:24:29,573 WARN L227 SmtUtils]: Spent 7.85s on a formula simplification. DAG size of input: 568 DAG size of output: 421 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:24:37,874 WARN L227 SmtUtils]: Spent 7.77s on a formula simplification. DAG size of input: 566 DAG size of output: 419 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:24:43,313 WARN L227 SmtUtils]: Spent 5.16s on a formula simplification. DAG size of input: 558 DAG size of output: 348 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:24:43,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [679904259] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:24:43,315 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:24:43,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [4, 4, 4] total 23 [2021-11-23 02:24:43,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465086153] [2021-11-23 02:24:43,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:24:43,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-23 02:24:43,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:24:43,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-23 02:24:43,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-11-23 02:24:43,318 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) [2021-11-23 02:24:45,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:24:45,490 INFO L93 Difference]: Finished difference Result 414 states and 652 transitions. [2021-11-23 02:24:45,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-23 02:24:45,492 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 [2021-11-23 02:24:45,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:24:45,494 INFO L225 Difference]: With dead ends: 414 [2021-11-23 02:24:45,495 INFO L226 Difference]: Without dead ends: 312 [2021-11-23 02:24:45,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 84.8s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-11-23 02:24:45,496 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 132 mSDsluCounter, 859 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 923 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:24:45,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 923 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-23 02:24:45,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-11-23 02:24:45,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 194. [2021-11-23 02:24:45,591 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) [2021-11-23 02:24:45,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 282 transitions. [2021-11-23 02:24:45,593 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 282 transitions. Word has length 57 [2021-11-23 02:24:45,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:24:45,593 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 282 transitions. [2021-11-23 02:24:45,593 INFO L471 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) [2021-11-23 02:24:45,594 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 282 transitions. [2021-11-23 02:24:45,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-23 02:24:45,595 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:24:45,595 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:24:45,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e23527-5729-487c-b7f6-fba580f3c529/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 02:24:45,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e23527-5729-487c-b7f6-fba580f3c529/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-23 02:24:45,798 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:24:45,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:24:45,799 INFO L85 PathProgramCache]: Analyzing trace with hash -789181693, now seen corresponding path program 1 times [2021-11-23 02:24:45,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:24:45,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48271653] [2021-11-23 02:24:45,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:24:45,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:24:45,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:24:45,873 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 02:24:45,873 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:24:45,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48271653] [2021-11-23 02:24:45,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48271653] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:24:45,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474392527] [2021-11-23 02:24:45,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:24:45,874 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:24:45,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e23527-5729-487c-b7f6-fba580f3c529/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:24:45,875 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e23527-5729-487c-b7f6-fba580f3c529/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:24:45,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e23527-5729-487c-b7f6-fba580f3c529/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 02:24:46,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:24:46,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 820 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:24:46,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:24:46,187 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:24:46,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:24:46,288 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:24:46,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474392527] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:24:46,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [346524661] [2021-11-23 02:24:46,291 INFO L159 IcfgInterpreter]: Started Sifa with 46 locations of interest [2021-11-23 02:24:46,291 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:24:46,292 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:24:46,292 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:24:46,292 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:24:58,466 INFO L197 IcfgInterpreter]: Interpreting procedure setClientId with input of size 453 for LOIs [2021-11-23 02:24:58,741 INFO L197 IcfgInterpreter]: Interpreting procedure sendEmail with input of size 249 for LOIs [2021-11-23 02:25:00,183 INFO L197 IcfgInterpreter]: Interpreting procedure outgoing with input of size 249 for LOIs [2021-11-23 02:25:02,918 INFO L197 IcfgInterpreter]: Interpreting procedure getEmailTo with input of size 242 for LOIs [2021-11-23 02:25:02,961 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailTo with input of size 239 for LOIs [2021-11-23 02:25:03,009 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailFrom with input of size 478 for LOIs [2021-11-23 02:25:04,554 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:25:30,401 WARN L227 SmtUtils]: Spent 5.13s on a formula simplification. DAG size of input: 558 DAG size of output: 355 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:25:35,803 WARN L227 SmtUtils]: Spent 5.17s on a formula simplification. DAG size of input: 555 DAG size of output: 349 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:25:51,670 WARN L227 SmtUtils]: Spent 12.31s on a formula simplification. DAG size of input: 478 DAG size of output: 365 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:26:15,170 WARN L227 SmtUtils]: Spent 5.91s on a formula simplification. DAG size of input: 506 DAG size of output: 391 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:26:22,547 WARN L227 SmtUtils]: Spent 6.87s on a formula simplification. DAG size of input: 570 DAG size of output: 434 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:26:29,998 WARN L227 SmtUtils]: Spent 6.91s on a formula simplification. DAG size of input: 571 DAG size of output: 433 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:26:37,858 WARN L227 SmtUtils]: Spent 7.25s on a formula simplification. DAG size of input: 604 DAG size of output: 446 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:26:37,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [346524661] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:26:37,862 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:26:37,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [6, 5, 5] total 44 [2021-11-23 02:26:37,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382935361] [2021-11-23 02:26:37,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:26:37,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-23 02:26:37,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:26:37,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-23 02:26:37,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1771, Unknown=0, NotChecked=0, Total=1892 [2021-11-23 02:26:37,865 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) [2021-11-23 02:27:06,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:27:06,870 INFO L93 Difference]: Finished difference Result 524 states and 852 transitions. [2021-11-23 02:27:06,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-23 02:27:06,871 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 [2021-11-23 02:27:06,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:27:06,874 INFO L225 Difference]: With dead ends: 524 [2021-11-23 02:27:06,874 INFO L226 Difference]: Without dead ends: 405 [2021-11-23 02:27:06,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 115.3s TimeCoverageRelationStatistics Valid=193, Invalid=2563, Unknown=0, NotChecked=0, Total=2756 [2021-11-23 02:27:06,877 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 244 mSDsluCounter, 2083 mSDsCounter, 0 mSdLazyCounter, 2782 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 2111 SdHoareTripleChecker+Invalid, 2820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 2782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:27:06,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 2111 Invalid, 2820 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [38 Valid, 2782 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2021-11-23 02:27:06,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-11-23 02:27:07,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 295. [2021-11-23 02:27:07,058 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) [2021-11-23 02:27:07,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 447 transitions. [2021-11-23 02:27:07,060 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 447 transitions. Word has length 58 [2021-11-23 02:27:07,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:27:07,060 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 447 transitions. [2021-11-23 02:27:07,061 INFO L471 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) [2021-11-23 02:27:07,061 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 447 transitions. [2021-11-23 02:27:07,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-23 02:27:07,063 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:27:07,064 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:27:07,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e23527-5729-487c-b7f6-fba580f3c529/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 02:27:07,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e23527-5729-487c-b7f6-fba580f3c529/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-23 02:27:07,279 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:27:07,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:27:07,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1393893186, now seen corresponding path program 1 times [2021-11-23 02:27:07,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:27:07,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526231368] [2021-11-23 02:27:07,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:07,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:27:07,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:07,356 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 02:27:07,357 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:27:07,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526231368] [2021-11-23 02:27:07,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526231368] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:27:07,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43483076] [2021-11-23 02:27:07,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:07,358 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:27:07,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e23527-5729-487c-b7f6-fba580f3c529/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:27:07,382 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e23527-5729-487c-b7f6-fba580f3c529/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:27:07,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e23527-5729-487c-b7f6-fba580f3c529/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 02:27:07,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:07,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 890 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:27:07,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:27:07,735 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-23 02:27:07,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:27:07,860 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-23 02:27:07,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43483076] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:27:07,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1065967751] [2021-11-23 02:27:07,869 INFO L159 IcfgInterpreter]: Started Sifa with 55 locations of interest [2021-11-23 02:27:07,870 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:27:07,871 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:27:07,872 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:27:07,872 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:27:20,102 INFO L197 IcfgInterpreter]: Interpreting procedure setClientId with input of size 451 for LOIs [2021-11-23 02:27:20,356 INFO L197 IcfgInterpreter]: Interpreting procedure sendEmail with input of size 249 for LOIs [2021-11-23 02:27:21,777 INFO L197 IcfgInterpreter]: Interpreting procedure outgoing with input of size 249 for LOIs [2021-11-23 02:27:41,248 INFO L197 IcfgInterpreter]: Interpreting procedure queue with input of size 455 for LOIs [2021-11-23 02:27:41,475 INFO L197 IcfgInterpreter]: Interpreting procedure getEmailFrom with input of size 446 for LOIs [2021-11-23 02:27:41,706 INFO L197 IcfgInterpreter]: Interpreting procedure getEmailTo with input of size 242 for LOIs [2021-11-23 02:27:41,748 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailTo with input of size 477 for LOIs [2021-11-23 02:27:43,255 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailFrom with input of size 478 for LOIs [2021-11-23 02:27:44,822 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:28:07,107 WARN L227 SmtUtils]: Spent 5.49s on a formula simplification. DAG size of input: 558 DAG size of output: 355 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:28:12,609 WARN L227 SmtUtils]: Spent 5.30s on a formula simplification. DAG size of input: 555 DAG size of output: 349 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:28:24,198 WARN L227 SmtUtils]: Spent 7.56s on a formula simplification. DAG size of input: 478 DAG size of output: 249 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:28:48,750 WARN L227 SmtUtils]: Spent 17.64s on a formula simplification. DAG size of input: 477 DAG size of output: 364 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:29:08,815 WARN L227 SmtUtils]: Spent 5.99s on a formula simplification. DAG size of input: 506 DAG size of output: 391 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:29:16,171 WARN L227 SmtUtils]: Spent 6.84s on a formula simplification. DAG size of input: 570 DAG size of output: 434 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:29:23,846 WARN L227 SmtUtils]: Spent 7.11s on a formula simplification. DAG size of input: 580 DAG size of output: 444 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:29:40,958 WARN L227 SmtUtils]: Spent 6.15s on a formula simplification. DAG size of input: 593 DAG size of output: 376 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:29:55,490 WARN L227 SmtUtils]: Spent 6.77s on a formula simplification. DAG size of input: 596 DAG size of output: 382 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:30:05,964 WARN L227 SmtUtils]: Spent 8.50s on a formula simplification. DAG size of input: 629 DAG size of output: 484 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:30:05,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1065967751] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:30:05,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:30:05,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [6, 5, 5] total 52 [2021-11-23 02:30:05,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43501821] [2021-11-23 02:30:05,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:30:05,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-23 02:30:05,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:30:05,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-23 02:30:05,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=2513, Unknown=0, NotChecked=0, Total=2652 [2021-11-23 02:30:05,972 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) [2021-11-23 02:30:40,107 WARN L227 SmtUtils]: Spent 6.10s on a formula simplification. DAG size of input: 592 DAG size of output: 391 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:30:46,526 WARN L227 SmtUtils]: Spent 6.11s on a formula simplification. DAG size of input: 594 DAG size of output: 393 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:30:49,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:30:49,279 INFO L93 Difference]: Finished difference Result 428 states and 633 transitions. [2021-11-23 02:30:49,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-23 02:30:49,280 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 69 [2021-11-23 02:30:49,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:30:49,284 INFO L225 Difference]: With dead ends: 428 [2021-11-23 02:30:49,284 INFO L226 Difference]: Without dead ends: 380 [2021-11-23 02:30:49,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 160 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 175.9s TimeCoverageRelationStatistics Valid=225, Invalid=3681, Unknown=0, NotChecked=0, Total=3906 [2021-11-23 02:30:49,287 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 290 mSDsluCounter, 2559 mSDsCounter, 0 mSdLazyCounter, 3505 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 2535 SdHoareTripleChecker+Invalid, 3530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 3505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:30:49,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 2535 Invalid, 3530 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [25 Valid, 3505 Invalid, 0 Unknown, 0 Unchecked, 8.2s Time] [2021-11-23 02:30:49,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-11-23 02:30:49,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 310. [2021-11-23 02:30:49,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 255 states have (on average 1.5411764705882354) internal successors, (393), 258 states have internal predecessors, (393), 34 states have call successors, (34), 22 states have call predecessors, (34), 20 states have return successors, (34), 29 states have call predecessors, (34), 33 states have call successors, (34) [2021-11-23 02:30:49,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 461 transitions. [2021-11-23 02:30:49,477 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 461 transitions. Word has length 69 [2021-11-23 02:30:49,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:30:49,477 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 461 transitions. [2021-11-23 02:30:49,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2021-11-23 02:30:49,478 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 461 transitions. [2021-11-23 02:30:49,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-23 02:30:49,480 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:30:49,481 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:30:49,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e23527-5729-487c-b7f6-fba580f3c529/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 02:30:49,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07e23527-5729-487c-b7f6-fba580f3c529/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:30:49,688 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:30:49,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:30:49,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1041744745, now seen corresponding path program 1 times [2021-11-23 02:30:49,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:30:49,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991650182] [2021-11-23 02:30:49,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:30:49,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:30:49,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:30:49,778 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-23 02:30:49,779 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:30:49,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991650182] [2021-11-23 02:30:49,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991650182] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:30:49,779 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:30:49,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:30:49,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635794497] [2021-11-23 02:30:49,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:30:49,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:30:49,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:30:49,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:30:49,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:30:49,782 INFO L87 Difference]: Start difference. First operand 310 states and 461 transitions. Second operand has 5 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 1 states have call successors, (11), 1 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2021-11-23 02:30:50,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:30:50,127 INFO L93 Difference]: Finished difference Result 312 states and 463 transitions. [2021-11-23 02:30:50,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:30:50,128 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 1 states have call successors, (11), 1 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) Word has length 63 [2021-11-23 02:30:50,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:30:50,129 INFO L225 Difference]: With dead ends: 312 [2021-11-23 02:30:50,129 INFO L226 Difference]: Without dead ends: 0 [2021-11-23 02:30:50,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:30:50,133 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 7 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:30:50,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 386 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:30:50,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-23 02:30:50,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-23 02:30:50,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:30:50,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-23 02:30:50,135 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 63 [2021-11-23 02:30:50,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:30:50,135 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-23 02:30:50,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 1 states have call successors, (11), 1 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2021-11-23 02:30:50,136 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-23 02:30:50,136 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-23 02:30:50,138 INFO L764 garLoopResultBuilder]: Registering result SAFE for location outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-23 02:30:50,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 02:30:50,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.