./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec11_product03.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778795b4-df9f-4440-a15e-e306f88aff40/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778795b4-df9f-4440-a15e-e306f88aff40/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778795b4-df9f-4440-a15e-e306f88aff40/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778795b4-df9f-4440-a15e-e306f88aff40/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec11_product03.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778795b4-df9f-4440-a15e-e306f88aff40/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778795b4-df9f-4440-a15e-e306f88aff40/bin/utaipan-7li7fVZpFI --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 ceaa95778492e3bc285d343b26b58125dae05b4d97d6b8fbdf100b65fa491c48 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:34:28,612 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:34:28,615 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:34:28,643 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:34:28,644 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:34:28,645 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:34:28,646 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:34:28,648 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:34:28,649 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:34:28,650 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:34:28,651 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:34:28,652 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:34:28,653 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:34:28,654 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:34:28,655 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:34:28,656 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:34:28,657 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:34:28,658 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:34:28,660 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:34:28,662 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:34:28,663 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:34:28,664 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:34:28,666 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:34:28,667 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:34:28,670 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:34:28,670 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:34:28,671 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:34:28,672 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:34:28,672 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:34:28,673 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:34:28,674 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:34:28,675 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:34:28,675 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:34:28,676 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:34:28,677 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:34:28,677 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:34:28,678 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:34:28,679 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:34:28,679 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:34:28,680 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:34:28,680 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:34:28,681 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778795b4-df9f-4440-a15e-e306f88aff40/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:34:28,702 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:34:28,702 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:34:28,703 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:34:28,703 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:34:28,704 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:34:28,704 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:34:28,704 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:34:28,705 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:34:28,705 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:34:28,705 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:34:28,705 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:34:28,706 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:34:28,706 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:34:28,706 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:34:28,706 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:34:28,706 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:34:28,707 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:34:28,707 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:34:28,708 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:34:28,708 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:34:28,708 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:34:28,708 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:34:28,709 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:34:28,709 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:34:28,709 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:34:28,709 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:34:28,709 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:34:28,710 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:34:28,710 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:34:28,710 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:34:28,710 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:34:28,711 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:34:28,711 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:34:28,711 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:34:28,711 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:34:28,712 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:34:28,712 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:34:28,712 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:34:28,712 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:34:28,712 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:34:28,713 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:34:28,713 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778795b4-df9f-4440-a15e-e306f88aff40/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778795b4-df9f-4440-a15e-e306f88aff40/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ceaa95778492e3bc285d343b26b58125dae05b4d97d6b8fbdf100b65fa491c48 [2022-11-03 02:34:28,971 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:34:29,004 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:34:29,007 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:34:29,008 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:34:29,009 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:34:29,010 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778795b4-df9f-4440-a15e-e306f88aff40/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/product-lines/email_spec11_product03.cil.c [2022-11-03 02:34:29,072 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778795b4-df9f-4440-a15e-e306f88aff40/bin/utaipan-7li7fVZpFI/data/48640d2f6/2cf49bc40da8457f9a54f0fc2cdf37b7/FLAG89d66bd29 [2022-11-03 02:34:29,602 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:34:29,602 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778795b4-df9f-4440-a15e-e306f88aff40/sv-benchmarks/c/product-lines/email_spec11_product03.cil.c [2022-11-03 02:34:29,624 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778795b4-df9f-4440-a15e-e306f88aff40/bin/utaipan-7li7fVZpFI/data/48640d2f6/2cf49bc40da8457f9a54f0fc2cdf37b7/FLAG89d66bd29 [2022-11-03 02:34:29,888 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778795b4-df9f-4440-a15e-e306f88aff40/bin/utaipan-7li7fVZpFI/data/48640d2f6/2cf49bc40da8457f9a54f0fc2cdf37b7 [2022-11-03 02:34:29,890 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:34:29,895 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:34:29,896 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:34:29,897 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:34:29,903 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:34:29,904 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:34:29" (1/1) ... [2022-11-03 02:34:29,905 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3eb00dab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:29, skipping insertion in model container [2022-11-03 02:34:29,905 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:34:29" (1/1) ... [2022-11-03 02:34:29,910 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:34:29,974 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:34:30,285 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_778795b4-df9f-4440-a15e-e306f88aff40/sv-benchmarks/c/product-lines/email_spec11_product03.cil.c[19915,19928] [2022-11-03 02:34:30,510 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:34:30,531 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:34:30,592 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_778795b4-df9f-4440-a15e-e306f88aff40/sv-benchmarks/c/product-lines/email_spec11_product03.cil.c[19915,19928] [2022-11-03 02:34:30,675 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:34:30,701 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:34:30,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:30 WrapperNode [2022-11-03 02:34:30,703 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:34:30,704 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:34:30,704 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:34:30,704 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:34:30,711 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:30" (1/1) ... [2022-11-03 02:34:30,731 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:30" (1/1) ... [2022-11-03 02:34:30,795 INFO L138 Inliner]: procedures = 107, calls = 125, calls flagged for inlining = 35, calls inlined = 27, statements flattened = 523 [2022-11-03 02:34:30,799 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:34:30,799 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:34:30,800 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:34:30,801 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:34:30,810 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:30" (1/1) ... [2022-11-03 02:34:30,810 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:30" (1/1) ... [2022-11-03 02:34:30,821 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:30" (1/1) ... [2022-11-03 02:34:30,823 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:30" (1/1) ... [2022-11-03 02:34:30,844 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:30" (1/1) ... [2022-11-03 02:34:30,851 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:30" (1/1) ... [2022-11-03 02:34:30,854 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:30" (1/1) ... [2022-11-03 02:34:30,856 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:30" (1/1) ... [2022-11-03 02:34:30,859 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:34:30,860 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:34:30,860 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:34:30,860 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:34:30,874 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:30" (1/1) ... [2022-11-03 02:34:30,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:34:30,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778795b4-df9f-4440-a15e-e306f88aff40/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:34:30,918 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778795b4-df9f-4440-a15e-e306f88aff40/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:34:30,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778795b4-df9f-4440-a15e-e306f88aff40/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:34:30,962 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailTo [2022-11-03 02:34:30,962 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailTo [2022-11-03 02:34:30,962 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailFrom [2022-11-03 02:34:30,962 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailFrom [2022-11-03 02:34:30,963 INFO L130 BoogieDeclarations]: Found specification of procedure isReadable [2022-11-03 02:34:30,963 INFO L138 BoogieDeclarations]: Found implementation of procedure isReadable [2022-11-03 02:34:30,963 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2022-11-03 02:34:30,963 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailFrom [2022-11-03 02:34:30,963 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailFrom [2022-11-03 02:34:30,963 INFO L130 BoogieDeclarations]: Found specification of procedure setClientId [2022-11-03 02:34:30,963 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientId [2022-11-03 02:34:30,963 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:34:30,964 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing [2022-11-03 02:34:30,964 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing [2022-11-03 02:34:30,964 INFO L130 BoogieDeclarations]: Found specification of procedure sendEmail [2022-11-03 02:34:30,964 INFO L138 BoogieDeclarations]: Found implementation of procedure sendEmail [2022-11-03 02:34:30,964 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailTo [2022-11-03 02:34:30,964 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailTo [2022-11-03 02:34:30,964 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:34:30,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:34:30,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:34:31,209 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:34:31,215 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:34:31,626 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:34:31,800 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:34:31,800 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:34:31,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:34:31 BoogieIcfgContainer [2022-11-03 02:34:31,804 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:34:31,807 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:34:31,807 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:34:31,811 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:34:31,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:34:29" (1/3) ... [2022-11-03 02:34:31,812 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d498ecf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:34:31, skipping insertion in model container [2022-11-03 02:34:31,813 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:30" (2/3) ... [2022-11-03 02:34:31,813 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d498ecf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:34:31, skipping insertion in model container [2022-11-03 02:34:31,813 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:34:31" (3/3) ... [2022-11-03 02:34:31,814 INFO L112 eAbstractionObserver]: Analyzing ICFG email_spec11_product03.cil.c [2022-11-03 02:34:31,837 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:34:31,837 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:34:31,906 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:34:31,919 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@12417687, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:34:31,919 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:34:31,927 INFO L276 IsEmpty]: Start isEmpty. Operand has 77 states, 54 states have (on average 1.537037037037037) internal successors, (83), 56 states have internal predecessors, (83), 13 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-03 02:34:31,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-03 02:34:31,936 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:34:31,937 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:34:31,937 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:34:31,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:34:31,943 INFO L85 PathProgramCache]: Analyzing trace with hash 2091842526, now seen corresponding path program 1 times [2022-11-03 02:34:31,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:34:31,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137938192] [2022-11-03 02:34:31,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:34:31,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:34:32,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:34:32,329 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:34:32,330 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:34:32,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137938192] [2022-11-03 02:34:32,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137938192] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:34:32,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:34:32,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:34:32,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715541521] [2022-11-03 02:34:32,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:34:32,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 02:34:32,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:34:32,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 02:34:32,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 02:34:32,382 INFO L87 Difference]: Start difference. First operand has 77 states, 54 states have (on average 1.537037037037037) internal successors, (83), 56 states have internal predecessors, (83), 13 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 02:34:32,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:34:32,483 INFO L93 Difference]: Finished difference Result 120 states and 160 transitions. [2022-11-03 02:34:32,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 02:34:32,493 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 42 [2022-11-03 02:34:32,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:34:32,504 INFO L225 Difference]: With dead ends: 120 [2022-11-03 02:34:32,504 INFO L226 Difference]: Without dead ends: 74 [2022-11-03 02:34:32,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 02:34:32,512 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:34:32,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 88 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:34:32,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-03 02:34:32,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-11-03 02:34:32,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 52 states have (on average 1.4807692307692308) internal successors, (77), 53 states have internal predecessors, (77), 13 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-03 02:34:32,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 102 transitions. [2022-11-03 02:34:32,575 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 102 transitions. Word has length 42 [2022-11-03 02:34:32,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:34:32,577 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 102 transitions. [2022-11-03 02:34:32,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 02:34:32,579 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 102 transitions. [2022-11-03 02:34:32,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-03 02:34:32,583 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:34:32,583 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:34:32,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:34:32,584 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:34:32,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:34:32,585 INFO L85 PathProgramCache]: Analyzing trace with hash -2101937107, now seen corresponding path program 1 times [2022-11-03 02:34:32,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:34:32,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686718744] [2022-11-03 02:34:32,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:34:32,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:34:32,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:34:32,843 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:34:32,843 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:34:32,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686718744] [2022-11-03 02:34:32,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686718744] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:34:32,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:34:32,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:34:32,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107352236] [2022-11-03 02:34:32,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:34:32,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:34:32,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:34:32,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:34:32,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:34:32,847 INFO L87 Difference]: Start difference. First operand 74 states and 102 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 02:34:32,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:34:32,911 INFO L93 Difference]: Finished difference Result 116 states and 148 transitions. [2022-11-03 02:34:32,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:34:32,912 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 43 [2022-11-03 02:34:32,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:34:32,913 INFO L225 Difference]: With dead ends: 116 [2022-11-03 02:34:32,914 INFO L226 Difference]: Without dead ends: 76 [2022-11-03 02:34:32,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:34:32,915 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 0 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:34:32,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 169 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:34:32,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-11-03 02:34:32,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2022-11-03 02:34:32,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 54 states have (on average 1.462962962962963) internal successors, (79), 55 states have internal predecessors, (79), 13 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-03 02:34:32,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 104 transitions. [2022-11-03 02:34:32,926 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 104 transitions. Word has length 43 [2022-11-03 02:34:32,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:34:32,927 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 104 transitions. [2022-11-03 02:34:32,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 02:34:32,927 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 104 transitions. [2022-11-03 02:34:32,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-03 02:34:32,929 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:34:32,929 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:34:32,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:34:32,929 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:34:32,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:34:32,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1788242173, now seen corresponding path program 1 times [2022-11-03 02:34:32,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:34:32,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769699574] [2022-11-03 02:34:32,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:34:32,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:34:32,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:34:33,099 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:34:33,100 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:34:33,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769699574] [2022-11-03 02:34:33,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769699574] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:34:33,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240307032] [2022-11-03 02:34:33,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:34:33,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:34:33,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778795b4-df9f-4440-a15e-e306f88aff40/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:34:33,103 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778795b4-df9f-4440-a15e-e306f88aff40/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:34:33,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778795b4-df9f-4440-a15e-e306f88aff40/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:34:33,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:34:33,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 760 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:34:33,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:34:33,479 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:34:33,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:34:33,573 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:34:33,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240307032] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:34:33,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1096466748] [2022-11-03 02:34:33,604 INFO L159 IcfgInterpreter]: Started Sifa with 40 locations of interest [2022-11-03 02:34:33,605 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:34:33,609 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:34:33,616 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:34:33,616 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:34:42,406 INFO L197 IcfgInterpreter]: Interpreting procedure setClientId with input of size 451 for LOIs [2022-11-03 02:34:42,805 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:35:11,708 WARN L234 SmtUtils]: Spent 10.09s on a formula simplification. DAG size of input: 564 DAG size of output: 323 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:35:22,351 WARN L234 SmtUtils]: Spent 9.91s on a formula simplification. DAG size of input: 566 DAG size of output: 378 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:35:23,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1096466748] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:23,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:35:23,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [4, 4, 4] total 19 [2022-11-03 02:35:23,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464139645] [2022-11-03 02:35:23,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:23,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-03 02:35:23,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:23,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-03 02:35:23,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-11-03 02:35:23,744 INFO L87 Difference]: Start difference. First operand 76 states and 104 transitions. Second operand has 14 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 02:35:27,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:27,291 INFO L93 Difference]: Finished difference Result 214 states and 337 transitions. [2022-11-03 02:35:27,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 02:35:27,294 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 47 [2022-11-03 02:35:27,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:27,301 INFO L225 Difference]: With dead ends: 214 [2022-11-03 02:35:27,301 INFO L226 Difference]: Without dead ends: 150 [2022-11-03 02:35:27,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 124 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 40.9s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-11-03 02:35:27,308 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 101 mSDsluCounter, 1199 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 1286 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:27,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 1286 Invalid, 769 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [13 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-11-03 02:35:27,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-11-03 02:35:27,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 97. [2022-11-03 02:35:27,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 75 states have (on average 1.48) internal successors, (111), 76 states have internal predecessors, (111), 13 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-03 02:35:27,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 136 transitions. [2022-11-03 02:35:27,395 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 136 transitions. Word has length 47 [2022-11-03 02:35:27,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:27,396 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 136 transitions. [2022-11-03 02:35:27,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 02:35:27,396 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 136 transitions. [2022-11-03 02:35:27,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-03 02:35:27,405 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:27,406 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:27,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778795b4-df9f-4440-a15e-e306f88aff40/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:27,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778795b4-df9f-4440-a15e-e306f88aff40/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:35:27,622 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:27,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:27,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1227442075, now seen corresponding path program 1 times [2022-11-03 02:35:27,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:27,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817257461] [2022-11-03 02:35:27,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:27,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:27,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:27,701 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:35:27,701 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:27,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817257461] [2022-11-03 02:35:27,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817257461] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:27,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:27,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:35:27,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366979650] [2022-11-03 02:35:27,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:27,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:35:27,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:27,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:35:27,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:35:27,708 INFO L87 Difference]: Start difference. First operand 97 states and 136 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 02:35:27,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:27,866 INFO L93 Difference]: Finished difference Result 230 states and 337 transitions. [2022-11-03 02:35:27,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:35:27,868 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 48 [2022-11-03 02:35:27,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:27,869 INFO L225 Difference]: With dead ends: 230 [2022-11-03 02:35:27,869 INFO L226 Difference]: Without dead ends: 147 [2022-11-03 02:35:27,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:35:27,871 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 46 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:27,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 166 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:35:27,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-11-03 02:35:27,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 142. [2022-11-03 02:35:27,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 120 states have (on average 1.55) internal successors, (186), 121 states have internal predecessors, (186), 13 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-03 02:35:27,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 211 transitions. [2022-11-03 02:35:27,967 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 211 transitions. Word has length 48 [2022-11-03 02:35:27,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:27,967 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 211 transitions. [2022-11-03 02:35:27,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 02:35:27,968 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 211 transitions. [2022-11-03 02:35:27,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-03 02:35:27,969 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:27,969 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:27,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 02:35:27,970 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:27,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:27,970 INFO L85 PathProgramCache]: Analyzing trace with hash 205106759, now seen corresponding path program 1 times [2022-11-03 02:35:27,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:27,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11736116] [2022-11-03 02:35:27,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:27,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:27,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:28,071 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:35:28,071 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:28,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11736116] [2022-11-03 02:35:28,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11736116] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:35:28,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794251539] [2022-11-03 02:35:28,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:28,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:35:28,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778795b4-df9f-4440-a15e-e306f88aff40/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:35:28,073 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778795b4-df9f-4440-a15e-e306f88aff40/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:35:28,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778795b4-df9f-4440-a15e-e306f88aff40/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:35:28,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:28,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 777 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:35:28,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:28,320 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:35:28,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:35:28,364 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:35:28,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794251539] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:35:28,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [887188587] [2022-11-03 02:35:28,368 INFO L159 IcfgInterpreter]: Started Sifa with 42 locations of interest [2022-11-03 02:35:28,368 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:35:28,368 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:35:28,369 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:35:28,369 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:35:40,246 INFO L197 IcfgInterpreter]: Interpreting procedure setClientId with input of size 451 for LOIs [2022-11-03 02:35:40,627 INFO L197 IcfgInterpreter]: Interpreting procedure sendEmail with input of size 249 for LOIs [2022-11-03 02:35:42,124 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailTo with input of size 239 for LOIs [2022-11-03 02:35:42,163 INFO L197 IcfgInterpreter]: Interpreting procedure outgoing with input of size 251 for LOIs [2022-11-03 02:35:45,867 INFO L197 IcfgInterpreter]: Interpreting procedure isReadable with input of size 244 for LOIs [2022-11-03 02:35:45,919 INFO L197 IcfgInterpreter]: Interpreting procedure getEmailTo with input of size 242 for LOIs [2022-11-03 02:35:45,982 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailFrom with input of size 478 for LOIs [2022-11-03 02:35:49,484 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:36:21,543 WARN L234 SmtUtils]: Spent 14.39s on a formula simplification. DAG size of input: 585 DAG size of output: 331 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:36:37,141 WARN L234 SmtUtils]: Spent 14.47s on a formula simplification. DAG size of input: 587 DAG size of output: 333 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:36:42,658 WARN L234 SmtUtils]: Spent 5.17s on a formula simplification. DAG size of input: 341 DAG size of output: 335 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:36:50,588 WARN L234 SmtUtils]: Spent 7.51s on a formula simplification. DAG size of input: 561 DAG size of output: 385 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:37:10,411 WARN L234 SmtUtils]: Spent 14.78s 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) [2022-11-03 02:37:37,984 WARN L234 SmtUtils]: Spent 6.19s on a formula simplification. DAG size of input: 506 DAG size of output: 360 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:37:50,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [887188587] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:37:50,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:37:50,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [4, 4, 4] total 44 [2022-11-03 02:37:50,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675167195] [2022-11-03 02:37:50,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:37:50,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-03 02:37:50,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:37:50,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-03 02:37:50,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1776, Unknown=0, NotChecked=0, Total=1892 [2022-11-03 02:37:50,221 INFO L87 Difference]: Start difference. First operand 142 states and 211 transitions. Second operand has 39 states, 25 states have (on average 1.08) internal successors, (27), 23 states have internal predecessors, (27), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-03 02:38:05,440 WARN L234 SmtUtils]: Spent 5.96s on a formula simplification. DAG size of input: 507 DAG size of output: 308 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:38:27,300 WARN L234 SmtUtils]: Spent 7.27s on a formula simplification. DAG size of input: 511 DAG size of output: 326 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:38:37,916 WARN L234 SmtUtils]: Spent 9.90s on a formula simplification. DAG size of input: 506 DAG size of output: 334 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:38:52,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:38:52,710 INFO L93 Difference]: Finished difference Result 374 states and 594 transitions. [2022-11-03 02:38:52,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-03 02:38:52,711 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 25 states have (on average 1.08) internal successors, (27), 23 states have internal predecessors, (27), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 49 [2022-11-03 02:38:52,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:38:52,714 INFO L225 Difference]: With dead ends: 374 [2022-11-03 02:38:52,715 INFO L226 Difference]: Without dead ends: 287 [2022-11-03 02:38:52,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 173.1s TimeCoverageRelationStatistics Valid=204, Invalid=2766, Unknown=0, NotChecked=0, Total=2970 [2022-11-03 02:38:52,717 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 244 mSDsluCounter, 2405 mSDsCounter, 0 mSdLazyCounter, 2771 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 2463 SdHoareTripleChecker+Invalid, 2813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 2771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:38:52,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 2463 Invalid, 2813 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [42 Valid, 2771 Invalid, 0 Unknown, 0 Unchecked, 9.6s Time] [2022-11-03 02:38:52,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-11-03 02:38:52,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 241. [2022-11-03 02:38:52,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 207 states have (on average 1.603864734299517) internal successors, (332), 209 states have internal predecessors, (332), 20 states have call successors, (20), 14 states have call predecessors, (20), 13 states have return successors, (20), 17 states have call predecessors, (20), 19 states have call successors, (20) [2022-11-03 02:38:52,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 372 transitions. [2022-11-03 02:38:52,907 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 372 transitions. Word has length 49 [2022-11-03 02:38:52,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:38:52,908 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 372 transitions. [2022-11-03 02:38:52,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 25 states have (on average 1.08) internal successors, (27), 23 states have internal predecessors, (27), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-03 02:38:52,908 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 372 transitions. [2022-11-03 02:38:52,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-03 02:38:52,910 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:38:52,910 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 02:38:52,935 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778795b4-df9f-4440-a15e-e306f88aff40/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-03 02:38:53,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778795b4-df9f-4440-a15e-e306f88aff40/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:38:53,113 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:38:53,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:38:53,114 INFO L85 PathProgramCache]: Analyzing trace with hash 587029707, now seen corresponding path program 1 times [2022-11-03 02:38:53,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:38:53,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389362794] [2022-11-03 02:38:53,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:38:53,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:38:53,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:38:53,277 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 02:38:53,277 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:38:53,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389362794] [2022-11-03 02:38:53,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389362794] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:38:53,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427851084] [2022-11-03 02:38:53,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:38:53,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:38:53,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778795b4-df9f-4440-a15e-e306f88aff40/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:38:53,283 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778795b4-df9f-4440-a15e-e306f88aff40/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:38:53,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778795b4-df9f-4440-a15e-e306f88aff40/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:38:53,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:38:53,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:38:53,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:38:53,571 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:38:53,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:38:53,646 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:38:53,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427851084] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:38:53,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1259864870] [2022-11-03 02:38:53,650 INFO L159 IcfgInterpreter]: Started Sifa with 42 locations of interest [2022-11-03 02:38:53,650 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:38:53,650 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:38:53,651 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:38:53,651 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:39:10,670 INFO L197 IcfgInterpreter]: Interpreting procedure setClientId with input of size 451 for LOIs [2022-11-03 02:39:10,953 INFO L197 IcfgInterpreter]: Interpreting procedure sendEmail with input of size 467 for LOIs [2022-11-03 02:39:34,632 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailTo with input of size 457 for LOIs [2022-11-03 02:39:34,920 INFO L197 IcfgInterpreter]: Interpreting procedure outgoing with input of size 465 for LOIs [2022-11-03 02:39:41,748 INFO L197 IcfgInterpreter]: Interpreting procedure isReadable with input of size 244 for LOIs [2022-11-03 02:39:41,778 INFO L197 IcfgInterpreter]: Interpreting procedure getEmailTo with input of size 242 for LOIs [2022-11-03 02:39:41,818 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailFrom with input of size 239 for LOIs [2022-11-03 02:39:41,932 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:40:15,811 WARN L234 SmtUtils]: Spent 5.57s on a formula simplification. DAG size of input: 559 DAG size of output: 333 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:40:22,416 WARN L234 SmtUtils]: Spent 5.05s on a formula simplification. DAG size of input: 556 DAG size of output: 318 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:40:39,125 WARN L234 SmtUtils]: Spent 6.41s on a formula simplification. DAG size of input: 509 DAG size of output: 335 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:40:52,815 WARN L234 SmtUtils]: Spent 5.03s on a formula simplification. DAG size of input: 505 DAG size of output: 280 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:40:59,233 WARN L234 SmtUtils]: Spent 5.97s on a formula simplification. DAG size of input: 518 DAG size of output: 324 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:41:10,317 WARN L234 SmtUtils]: Spent 5.26s on a formula simplification. DAG size of input: 504 DAG size of output: 317 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:41:21,988 WARN L234 SmtUtils]: Spent 6.28s on a formula simplification. DAG size of input: 506 DAG size of output: 360 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:41:34,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1259864870] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:41:34,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:41:34,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [6, 5, 5] total 47 [2022-11-03 02:41:34,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47625936] [2022-11-03 02:41:34,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:41:34,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-03 02:41:34,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:41:34,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-03 02:41:34,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=2035, Unknown=0, NotChecked=0, Total=2162 [2022-11-03 02:41:34,410 INFO L87 Difference]: Start difference. First operand 241 states and 372 transitions. Second operand has 39 states, 25 states have (on average 1.12) internal successors, (28), 23 states have internal predecessors, (28), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-03 02:42:17,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:17,008 INFO L93 Difference]: Finished difference Result 538 states and 856 transitions. [2022-11-03 02:42:17,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-03 02:42:17,009 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 25 states have (on average 1.12) internal successors, (28), 23 states have internal predecessors, (28), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 52 [2022-11-03 02:42:17,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:17,013 INFO L225 Difference]: With dead ends: 538 [2022-11-03 02:42:17,013 INFO L226 Difference]: Without dead ends: 451 [2022-11-03 02:42:17,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 114 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 145.1s TimeCoverageRelationStatistics Valid=219, Invalid=3203, Unknown=0, NotChecked=0, Total=3422 [2022-11-03 02:42:17,016 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 399 mSDsluCounter, 2121 mSDsCounter, 0 mSdLazyCounter, 2794 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 2175 SdHoareTripleChecker+Invalid, 2847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 2794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:17,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [401 Valid, 2175 Invalid, 2847 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [53 Valid, 2794 Invalid, 0 Unknown, 0 Unchecked, 9.3s Time] [2022-11-03 02:42:17,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2022-11-03 02:42:17,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 273. [2022-11-03 02:42:17,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 239 states have (on average 1.598326359832636) internal successors, (382), 241 states have internal predecessors, (382), 20 states have call successors, (20), 14 states have call predecessors, (20), 13 states have return successors, (20), 17 states have call predecessors, (20), 19 states have call successors, (20) [2022-11-03 02:42:17,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 422 transitions. [2022-11-03 02:42:17,310 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 422 transitions. Word has length 52 [2022-11-03 02:42:17,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:17,311 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 422 transitions. [2022-11-03 02:42:17,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 25 states have (on average 1.12) internal successors, (28), 23 states have internal predecessors, (28), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-03 02:42:17,312 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 422 transitions. [2022-11-03 02:42:17,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-03 02:42:17,314 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:17,314 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:42:17,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778795b4-df9f-4440-a15e-e306f88aff40/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:42:17,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778795b4-df9f-4440-a15e-e306f88aff40/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:42:17,535 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:17,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:17,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1902628023, now seen corresponding path program 1 times [2022-11-03 02:42:17,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:42:17,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245246086] [2022-11-03 02:42:17,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:17,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:42:17,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:17,820 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 02:42:17,820 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:42:17,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245246086] [2022-11-03 02:42:17,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245246086] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:42:17,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140366836] [2022-11-03 02:42:17,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:17,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:42:17,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778795b4-df9f-4440-a15e-e306f88aff40/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:42:17,826 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778795b4-df9f-4440-a15e-e306f88aff40/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:42:17,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778795b4-df9f-4440-a15e-e306f88aff40/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:42:18,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:18,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 799 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:42:18,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:18,128 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:42:18,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:42:18,196 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:42:18,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140366836] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:42:18,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [283854354] [2022-11-03 02:42:18,201 INFO L159 IcfgInterpreter]: Started Sifa with 44 locations of interest [2022-11-03 02:42:18,202 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:42:18,203 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:42:18,203 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:42:18,203 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:42:49,674 INFO L197 IcfgInterpreter]: Interpreting procedure setClientId with input of size 451 for LOIs [2022-11-03 02:42:49,957 INFO L197 IcfgInterpreter]: Interpreting procedure sendEmail with input of size 249 for LOIs [2022-11-03 02:42:51,382 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailTo with input of size 239 for LOIs [2022-11-03 02:42:51,422 INFO L197 IcfgInterpreter]: Interpreting procedure outgoing with input of size 249 for LOIs [2022-11-03 02:42:54,501 INFO L197 IcfgInterpreter]: Interpreting procedure isReadable with input of size 244 for LOIs [2022-11-03 02:42:54,547 INFO L197 IcfgInterpreter]: Interpreting procedure getEmailTo with input of size 242 for LOIs [2022-11-03 02:42:54,583 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailFrom with input of size 478 for LOIs [2022-11-03 02:42:57,815 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:43:38,999 WARN L234 SmtUtils]: Spent 7.68s on a formula simplification. DAG size of input: 555 DAG size of output: 383 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:43:47,107 WARN L234 SmtUtils]: Spent 7.75s on a formula simplification. DAG size of input: 558 DAG size of output: 386 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:43:55,019 WARN L234 SmtUtils]: Spent 7.55s on a formula simplification. DAG size of input: 557 DAG size of output: 385 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:44:03,238 WARN L234 SmtUtils]: Spent 7.82s on a formula simplification. DAG size of input: 561 DAG size of output: 389 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:44:20,815 WARN L234 SmtUtils]: Spent 8.88s 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) [2022-11-03 02:44:49,107 WARN L234 SmtUtils]: Spent 6.33s on a formula simplification. DAG size of input: 506 DAG size of output: 360 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:45:01,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [283854354] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:45:01,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:45:01,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [6, 5, 5] total 49 [2022-11-03 02:45:01,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124083607] [2022-11-03 02:45:01,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:45:01,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-03 02:45:01,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:45:01,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-03 02:45:01,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=2214, Unknown=0, NotChecked=0, Total=2352 [2022-11-03 02:45:01,889 INFO L87 Difference]: Start difference. First operand 273 states and 422 transitions. Second operand has 41 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 25 states have internal predecessors, (30), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-03 02:45:21,001 WARN L234 SmtUtils]: Spent 5.04s on a formula simplification. DAG size of input: 470 DAG size of output: 344 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:45:42,442 WARN L234 SmtUtils]: Spent 5.35s on a formula simplification. DAG size of input: 472 DAG size of output: 345 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:46:05,238 WARN L234 SmtUtils]: Spent 5.28s on a formula simplification. DAG size of input: 472 DAG size of output: 347 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:46:11,714 WARN L234 SmtUtils]: Spent 5.09s on a formula simplification. DAG size of input: 464 DAG size of output: 348 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:46:34,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:46:34,636 INFO L93 Difference]: Finished difference Result 800 states and 1310 transitions. [2022-11-03 02:46:34,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-03 02:46:34,639 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 25 states have internal predecessors, (30), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 56 [2022-11-03 02:46:34,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:46:34,643 INFO L225 Difference]: With dead ends: 800 [2022-11-03 02:46:34,643 INFO L226 Difference]: Without dead ends: 640 [2022-11-03 02:46:34,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 124 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 200.8s TimeCoverageRelationStatistics Valid=320, Invalid=3970, Unknown=0, NotChecked=0, Total=4290 [2022-11-03 02:46:34,646 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 344 mSDsluCounter, 2935 mSDsCounter, 0 mSdLazyCounter, 4160 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 3004 SdHoareTripleChecker+Invalid, 4229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 4160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:46:34,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [346 Valid, 3004 Invalid, 4229 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [69 Valid, 4160 Invalid, 0 Unknown, 0 Unchecked, 14.9s Time] [2022-11-03 02:46:34,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2022-11-03 02:46:34,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 291. [2022-11-03 02:46:34,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 257 states have (on average 1.6031128404669261) internal successors, (412), 259 states have internal predecessors, (412), 20 states have call successors, (20), 14 states have call predecessors, (20), 13 states have return successors, (20), 17 states have call predecessors, (20), 19 states have call successors, (20) [2022-11-03 02:46:34,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 452 transitions. [2022-11-03 02:46:34,954 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 452 transitions. Word has length 56 [2022-11-03 02:46:34,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:46:34,955 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 452 transitions. [2022-11-03 02:46:34,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 25 states have internal predecessors, (30), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-03 02:46:34,955 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 452 transitions. [2022-11-03 02:46:34,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-03 02:46:34,956 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:46:34,956 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:46:34,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778795b4-df9f-4440-a15e-e306f88aff40/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:46:35,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778795b4-df9f-4440-a15e-e306f88aff40/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-03 02:46:35,157 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:46:35,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:46:35,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1681044315, now seen corresponding path program 1 times [2022-11-03 02:46:35,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:46:35,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022260641] [2022-11-03 02:46:35,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:35,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:46:35,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:35,323 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 02:46:35,325 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:46:35,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022260641] [2022-11-03 02:46:35,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022260641] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:46:35,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050767220] [2022-11-03 02:46:35,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:35,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:46:35,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778795b4-df9f-4440-a15e-e306f88aff40/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:46:35,327 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778795b4-df9f-4440-a15e-e306f88aff40/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:46:35,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778795b4-df9f-4440-a15e-e306f88aff40/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:46:35,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:35,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 798 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:46:35,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:46:35,652 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:46:35,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:46:35,748 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:46:35,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050767220] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:46:35,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [196761218] [2022-11-03 02:46:35,752 INFO L159 IcfgInterpreter]: Started Sifa with 44 locations of interest [2022-11-03 02:46:35,752 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:46:35,753 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:46:35,753 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:46:35,753 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:47:06,897 INFO L197 IcfgInterpreter]: Interpreting procedure setClientId with input of size 451 for LOIs [2022-11-03 02:47:07,249 INFO L197 IcfgInterpreter]: Interpreting procedure sendEmail with input of size 467 for LOIs