./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec11_product24.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_b503b6cb-6ccc-408e-a37c-4278bde87b1a/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b503b6cb-6ccc-408e-a37c-4278bde87b1a/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b503b6cb-6ccc-408e-a37c-4278bde87b1a/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b503b6cb-6ccc-408e-a37c-4278bde87b1a/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec11_product24.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b503b6cb-6ccc-408e-a37c-4278bde87b1a/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b503b6cb-6ccc-408e-a37c-4278bde87b1a/bin/utaipan-I9t0OCRTmS --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 51fa488e776e831bac86701b44da2398387b953b2cee791cda39a1547c039fcd --- 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-8393723 [2022-11-19 06:35:44,465 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 06:35:44,467 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 06:35:44,490 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 06:35:44,493 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 06:35:44,497 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 06:35:44,500 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 06:35:44,503 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 06:35:44,507 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 06:35:44,515 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 06:35:44,517 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 06:35:44,519 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 06:35:44,519 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 06:35:44,521 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 06:35:44,522 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 06:35:44,523 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 06:35:44,524 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 06:35:44,524 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 06:35:44,526 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 06:35:44,527 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 06:35:44,529 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 06:35:44,530 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 06:35:44,531 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 06:35:44,531 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 06:35:44,534 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 06:35:44,535 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 06:35:44,535 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 06:35:44,536 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 06:35:44,536 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 06:35:44,537 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 06:35:44,537 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 06:35:44,538 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 06:35:44,539 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 06:35:44,540 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 06:35:44,540 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 06:35:44,541 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 06:35:44,541 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 06:35:44,542 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 06:35:44,542 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 06:35:44,550 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 06:35:44,552 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 06:35:44,553 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b503b6cb-6ccc-408e-a37c-4278bde87b1a/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 06:35:44,589 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 06:35:44,590 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 06:35:44,590 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 06:35:44,590 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 06:35:44,595 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 06:35:44,596 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 06:35:44,596 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 06:35:44,596 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 06:35:44,596 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 06:35:44,596 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 06:35:44,597 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 06:35:44,598 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 06:35:44,598 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 06:35:44,598 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 06:35:44,598 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 06:35:44,598 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 06:35:44,599 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 06:35:44,599 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 06:35:44,599 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 06:35:44,600 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 06:35:44,600 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 06:35:44,600 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 06:35:44,600 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 06:35:44,601 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 06:35:44,601 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 06:35:44,601 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 06:35:44,601 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 06:35:44,601 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 06:35:44,602 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 06:35:44,602 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 06:35:44,602 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 06:35:44,602 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 06:35:44,603 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:35:44,603 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 06:35:44,603 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 06:35:44,603 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 06:35:44,603 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 06:35:44,603 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 06:35:44,604 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 06:35:44,604 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 06:35:44,605 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 06:35:44,605 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_b503b6cb-6ccc-408e-a37c-4278bde87b1a/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b503b6cb-6ccc-408e-a37c-4278bde87b1a/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 51fa488e776e831bac86701b44da2398387b953b2cee791cda39a1547c039fcd [2022-11-19 06:35:44,912 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 06:35:44,934 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 06:35:44,936 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 06:35:44,937 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 06:35:44,938 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 06:35:44,940 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b503b6cb-6ccc-408e-a37c-4278bde87b1a/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/product-lines/email_spec11_product24.cil.c [2022-11-19 06:35:45,010 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b503b6cb-6ccc-408e-a37c-4278bde87b1a/bin/utaipan-I9t0OCRTmS/data/83c1912d7/7a8005e5701e4f01a426f75c47d8dcf6/FLAG354780a5f [2022-11-19 06:35:45,593 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 06:35:45,606 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b503b6cb-6ccc-408e-a37c-4278bde87b1a/sv-benchmarks/c/product-lines/email_spec11_product24.cil.c [2022-11-19 06:35:45,627 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b503b6cb-6ccc-408e-a37c-4278bde87b1a/bin/utaipan-I9t0OCRTmS/data/83c1912d7/7a8005e5701e4f01a426f75c47d8dcf6/FLAG354780a5f [2022-11-19 06:35:45,844 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b503b6cb-6ccc-408e-a37c-4278bde87b1a/bin/utaipan-I9t0OCRTmS/data/83c1912d7/7a8005e5701e4f01a426f75c47d8dcf6 [2022-11-19 06:35:45,847 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 06:35:45,853 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 06:35:45,858 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 06:35:45,858 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 06:35:45,861 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 06:35:45,862 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:35:45" (1/1) ... [2022-11-19 06:35:45,863 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a5587cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:35:45, skipping insertion in model container [2022-11-19 06:35:45,863 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:35:45" (1/1) ... [2022-11-19 06:35:45,874 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 06:35:45,967 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 06:35:46,323 WARN L234 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_b503b6cb-6ccc-408e-a37c-4278bde87b1a/sv-benchmarks/c/product-lines/email_spec11_product24.cil.c[16887,16900] [2022-11-19 06:35:46,604 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:35:46,615 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 06:35:46,652 WARN L234 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_b503b6cb-6ccc-408e-a37c-4278bde87b1a/sv-benchmarks/c/product-lines/email_spec11_product24.cil.c[16887,16900] [2022-11-19 06:35:46,710 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:35:46,751 INFO L208 MainTranslator]: Completed translation [2022-11-19 06:35:46,751 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:35:46 WrapperNode [2022-11-19 06:35:46,752 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 06:35:46,753 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 06:35:46,753 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 06:35:46,753 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 06:35:46,761 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:35:46" (1/1) ... [2022-11-19 06:35:46,814 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:35:46" (1/1) ... [2022-11-19 06:35:46,875 INFO L138 Inliner]: procedures = 130, calls = 208, calls flagged for inlining = 64, calls inlined = 59, statements flattened = 1049 [2022-11-19 06:35:46,876 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 06:35:46,877 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 06:35:46,877 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 06:35:46,877 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 06:35:46,886 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:35:46" (1/1) ... [2022-11-19 06:35:46,895 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:35:46" (1/1) ... [2022-11-19 06:35:46,900 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:35:46" (1/1) ... [2022-11-19 06:35:46,900 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:35:46" (1/1) ... [2022-11-19 06:35:46,914 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:35:46" (1/1) ... [2022-11-19 06:35:46,949 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:35:46" (1/1) ... [2022-11-19 06:35:46,953 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:35:46" (1/1) ... [2022-11-19 06:35:46,956 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:35:46" (1/1) ... [2022-11-19 06:35:46,962 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 06:35:46,975 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 06:35:46,975 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 06:35:46,975 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 06:35:46,987 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:35:46" (1/1) ... [2022-11-19 06:35:46,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:35:47,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b503b6cb-6ccc-408e-a37c-4278bde87b1a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:35:47,020 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b503b6cb-6ccc-408e-a37c-4278bde87b1a/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 06:35:47,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b503b6cb-6ccc-408e-a37c-4278bde87b1a/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 06:35:47,080 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailTo [2022-11-19 06:35:47,081 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailTo [2022-11-19 06:35:47,081 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailFrom [2022-11-19 06:35:47,081 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailFrom [2022-11-19 06:35:47,081 INFO L130 BoogieDeclarations]: Found specification of procedure isReadable [2022-11-19 06:35:47,082 INFO L138 BoogieDeclarations]: Found implementation of procedure isReadable [2022-11-19 06:35:47,082 INFO L130 BoogieDeclarations]: Found specification of procedure createClientKeyringEntry [2022-11-19 06:35:47,082 INFO L138 BoogieDeclarations]: Found implementation of procedure createClientKeyringEntry [2022-11-19 06:35:47,082 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailSignKey [2022-11-19 06:35:47,082 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailSignKey [2022-11-19 06:35:47,082 INFO L130 BoogieDeclarations]: Found specification of procedure chuckKeyAdd [2022-11-19 06:35:47,083 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckKeyAdd [2022-11-19 06:35:47,083 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2022-11-19 06:35:47,083 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailFrom [2022-11-19 06:35:47,083 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailFrom [2022-11-19 06:35:47,083 INFO L130 BoogieDeclarations]: Found specification of procedure queue [2022-11-19 06:35:47,083 INFO L138 BoogieDeclarations]: Found implementation of procedure queue [2022-11-19 06:35:47,084 INFO L130 BoogieDeclarations]: Found specification of procedure setClientId [2022-11-19 06:35:47,084 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientId [2022-11-19 06:35:47,084 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 06:35:47,084 INFO L130 BoogieDeclarations]: Found specification of procedure isSigned [2022-11-19 06:35:47,084 INFO L138 BoogieDeclarations]: Found implementation of procedure isSigned [2022-11-19 06:35:47,084 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringUser [2022-11-19 06:35:47,085 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringUser [2022-11-19 06:35:47,085 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringPublicKey [2022-11-19 06:35:47,085 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringPublicKey [2022-11-19 06:35:47,085 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing [2022-11-19 06:35:47,085 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing [2022-11-19 06:35:47,085 INFO L130 BoogieDeclarations]: Found specification of procedure sendEmail [2022-11-19 06:35:47,085 INFO L138 BoogieDeclarations]: Found implementation of procedure sendEmail [2022-11-19 06:35:47,086 INFO L130 BoogieDeclarations]: Found specification of procedure setClientPrivateKey [2022-11-19 06:35:47,086 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientPrivateKey [2022-11-19 06:35:47,086 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailTo [2022-11-19 06:35:47,086 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailTo [2022-11-19 06:35:47,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 06:35:47,087 INFO L130 BoogieDeclarations]: Found specification of procedure generateKeyPair [2022-11-19 06:35:47,087 INFO L138 BoogieDeclarations]: Found implementation of procedure generateKeyPair [2022-11-19 06:35:47,087 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 06:35:47,087 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 06:35:47,352 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 06:35:47,354 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 06:35:48,324 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 06:35:48,828 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 06:35:48,828 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-19 06:35:48,831 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:35:48 BoogieIcfgContainer [2022-11-19 06:35:48,832 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 06:35:48,834 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 06:35:48,834 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 06:35:48,838 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 06:35:48,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 06:35:45" (1/3) ... [2022-11-19 06:35:48,839 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@320b84cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:35:48, skipping insertion in model container [2022-11-19 06:35:48,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:35:46" (2/3) ... [2022-11-19 06:35:48,839 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@320b84cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:35:48, skipping insertion in model container [2022-11-19 06:35:48,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:35:48" (3/3) ... [2022-11-19 06:35:48,841 INFO L112 eAbstractionObserver]: Analyzing ICFG email_spec11_product24.cil.c [2022-11-19 06:35:48,861 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 06:35:48,861 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 06:35:48,936 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 06:35:48,947 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;@7f7423fb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 06:35:48,947 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 06:35:48,952 INFO L276 IsEmpty]: Start isEmpty. Operand has 161 states, 96 states have (on average 1.34375) internal successors, (129), 98 states have internal predecessors, (129), 46 states have call successors, (46), 17 states have call predecessors, (46), 17 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2022-11-19 06:35:48,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-19 06:35:48,967 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:35:48,968 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:35:48,969 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:35:48,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:35:48,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1242711693, now seen corresponding path program 1 times [2022-11-19 06:35:48,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:35:48,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007462573] [2022-11-19 06:35:48,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:35:48,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:35:49,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:35:49,329 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 06:35:49,330 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:35:49,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007462573] [2022-11-19 06:35:49,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007462573] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:35:49,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:35:49,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 06:35:49,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34702757] [2022-11-19 06:35:49,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:35:49,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-19 06:35:49,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:35:49,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-19 06:35:49,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 06:35:49,379 INFO L87 Difference]: Start difference. First operand has 161 states, 96 states have (on average 1.34375) internal successors, (129), 98 states have internal predecessors, (129), 46 states have call successors, (46), 17 states have call predecessors, (46), 17 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) Second operand has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-19 06:35:49,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:35:49,546 INFO L93 Difference]: Finished difference Result 239 states and 320 transitions. [2022-11-19 06:35:49,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-19 06:35:49,549 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 60 [2022-11-19 06:35:49,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:35:49,561 INFO L225 Difference]: With dead ends: 239 [2022-11-19 06:35:49,562 INFO L226 Difference]: Without dead ends: 158 [2022-11-19 06:35:49,567 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 [2022-11-19 06:35:49,572 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:35:49,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 186 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:35:49,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-11-19 06:35:49,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2022-11-19 06:35:49,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 94 states have (on average 1.3085106382978724) internal successors, (123), 95 states have internal predecessors, (123), 46 states have call successors, (46), 17 states have call predecessors, (46), 17 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2022-11-19 06:35:49,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 214 transitions. [2022-11-19 06:35:49,638 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 214 transitions. Word has length 60 [2022-11-19 06:35:49,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:35:49,644 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 214 transitions. [2022-11-19 06:35:49,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-19 06:35:49,644 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 214 transitions. [2022-11-19 06:35:49,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-19 06:35:49,647 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:35:49,647 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:35:49,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 06:35:49,648 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:35:49,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:35:49,649 INFO L85 PathProgramCache]: Analyzing trace with hash -720978825, now seen corresponding path program 1 times [2022-11-19 06:35:49,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:35:49,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348481168] [2022-11-19 06:35:49,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:35:49,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:35:49,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:35:49,890 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 06:35:49,890 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:35:49,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348481168] [2022-11-19 06:35:49,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348481168] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:35:49,891 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:35:49,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:35:49,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402276270] [2022-11-19 06:35:49,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:35:49,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:35:49,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:35:49,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:35:49,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:35:49,894 INFO L87 Difference]: Start difference. First operand 158 states and 214 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-19 06:35:50,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:35:50,060 INFO L93 Difference]: Finished difference Result 235 states and 308 transitions. [2022-11-19 06:35:50,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:35:50,061 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 61 [2022-11-19 06:35:50,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:35:50,068 INFO L225 Difference]: With dead ends: 235 [2022-11-19 06:35:50,068 INFO L226 Difference]: Without dead ends: 160 [2022-11-19 06:35:50,076 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 [2022-11-19 06:35:50,079 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 0 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:35:50,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 365 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:35:50,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-11-19 06:35:50,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2022-11-19 06:35:50,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 96 states have (on average 1.3020833333333333) internal successors, (125), 97 states have internal predecessors, (125), 46 states have call successors, (46), 17 states have call predecessors, (46), 17 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2022-11-19 06:35:50,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 216 transitions. [2022-11-19 06:35:50,107 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 216 transitions. Word has length 61 [2022-11-19 06:35:50,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:35:50,109 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 216 transitions. [2022-11-19 06:35:50,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-19 06:35:50,110 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 216 transitions. [2022-11-19 06:35:50,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-19 06:35:50,120 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:35:50,120 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:35:50,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 06:35:50,121 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:35:50,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:35:50,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1393388340, now seen corresponding path program 1 times [2022-11-19 06:35:50,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:35:50,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026896165] [2022-11-19 06:35:50,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:35:50,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:35:50,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:35:50,349 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 06:35:50,349 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:35:50,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026896165] [2022-11-19 06:35:50,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026896165] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:35:50,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:35:50,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:35:50,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757954697] [2022-11-19 06:35:50,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:35:50,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:35:50,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:35:50,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:35:50,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:35:50,354 INFO L87 Difference]: Start difference. First operand 160 states and 216 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-19 06:35:50,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:35:50,496 INFO L93 Difference]: Finished difference Result 350 states and 491 transitions. [2022-11-19 06:35:50,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:35:50,497 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 66 [2022-11-19 06:35:50,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:35:50,502 INFO L225 Difference]: With dead ends: 350 [2022-11-19 06:35:50,503 INFO L226 Difference]: Without dead ends: 208 [2022-11-19 06:35:50,505 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 [2022-11-19 06:35:50,512 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 57 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:35:50,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 376 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:35:50,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-11-19 06:35:50,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 203. [2022-11-19 06:35:50,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 128 states have (on average 1.390625) internal successors, (178), 129 states have internal predecessors, (178), 57 states have call successors, (57), 17 states have call predecessors, (57), 17 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) [2022-11-19 06:35:50,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 291 transitions. [2022-11-19 06:35:50,550 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 291 transitions. Word has length 66 [2022-11-19 06:35:50,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:35:50,550 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 291 transitions. [2022-11-19 06:35:50,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-19 06:35:50,551 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 291 transitions. [2022-11-19 06:35:50,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-19 06:35:50,552 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:35:50,552 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:35:50,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 06:35:50,553 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:35:50,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:35:50,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1891110327, now seen corresponding path program 1 times [2022-11-19 06:35:50,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:35:50,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388976494] [2022-11-19 06:35:50,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:35:50,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:35:50,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:35:50,802 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 06:35:50,802 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:35:50,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388976494] [2022-11-19 06:35:50,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388976494] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:35:50,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861608834] [2022-11-19 06:35:50,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:35:50,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:35:50,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b503b6cb-6ccc-408e-a37c-4278bde87b1a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:35:50,807 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b503b6cb-6ccc-408e-a37c-4278bde87b1a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:35:50,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b503b6cb-6ccc-408e-a37c-4278bde87b1a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 06:35:51,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:35:51,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 1024 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 06:35:51,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:35:51,266 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 06:35:51,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:35:51,342 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 06:35:51,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861608834] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:35:51,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1454389547] [2022-11-19 06:35:51,364 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-11-19 06:35:51,364 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:35:51,367 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:35:51,372 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:35:51,372 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:36:39,096 INFO L197 IcfgInterpreter]: Interpreting procedure setClientId with input of size 444 for LOIs [2022-11-19 06:36:39,443 INFO L197 IcfgInterpreter]: Interpreting procedure setClientPrivateKey with input of size 441 for LOIs [2022-11-19 06:36:39,754 INFO L197 IcfgInterpreter]: Interpreting procedure sendEmail with input of size 259 for LOIs [2022-11-19 06:36:41,763 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailTo with input of size 237 for LOIs [2022-11-19 06:36:41,805 INFO L197 IcfgInterpreter]: Interpreting procedure outgoing with input of size 261 for LOIs [2022-11-19 06:36:52,493 INFO L197 IcfgInterpreter]: Interpreting procedure isReadable with input of size 251 for LOIs [2022-11-19 06:36:52,528 INFO L197 IcfgInterpreter]: Interpreting procedure getEmailTo with input of size 251 for LOIs [2022-11-19 06:36:52,570 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailFrom with input of size 449 for LOIs [2022-11-19 06:36:53,213 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:37:11,182 WARN L233 SmtUtils]: Spent 5.11s on a formula simplification. DAG size of input: 467 DAG size of output: 264 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:37:34,577 WARN L233 SmtUtils]: Spent 5.44s on a formula simplification. DAG size of input: 492 DAG size of output: 304 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:38:00,597 WARN L233 SmtUtils]: Spent 8.04s on a formula simplification. DAG size of input: 566 DAG size of output: 402 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:38:09,053 WARN L233 SmtUtils]: Spent 8.16s on a formula simplification. DAG size of input: 570 DAG size of output: 406 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:38:48,834 WARN L233 SmtUtils]: Spent 5.96s on a formula simplification. DAG size of input: 567 DAG size of output: 380 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:39:00,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1454389547] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:39:00,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:39:00,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [4, 4, 4] total 48 [2022-11-19 06:39:00,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623936635] [2022-11-19 06:39:00,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:39:00,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-19 06:39:00,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:39:00,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-19 06:39:00,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=2129, Unknown=0, NotChecked=0, Total=2256 [2022-11-19 06:39:01,000 INFO L87 Difference]: Start difference. First operand 203 states and 291 transitions. Second operand has 43 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 26 states have internal predecessors, (34), 14 states have call successors, (14), 8 states have call predecessors, (14), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-19 06:39:16,372 WARN L233 SmtUtils]: Spent 5.24s on a formula simplification. DAG size of input: 494 DAG size of output: 355 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:39:22,186 WARN L233 SmtUtils]: Spent 5.31s on a formula simplification. DAG size of input: 499 DAG size of output: 358 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:39:28,087 WARN L233 SmtUtils]: Spent 5.27s on a formula simplification. DAG size of input: 490 DAG size of output: 359 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:39:34,512 WARN L233 SmtUtils]: Spent 5.35s on a formula simplification. DAG size of input: 492 DAG size of output: 360 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:39:41,517 WARN L233 SmtUtils]: Spent 5.42s on a formula simplification. DAG size of input: 495 DAG size of output: 362 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:40:01,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:40:01,247 INFO L93 Difference]: Finished difference Result 591 states and 927 transitions. [2022-11-19 06:40:01,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-19 06:40:01,248 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 26 states have internal predecessors, (34), 14 states have call successors, (14), 8 states have call predecessors, (14), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 67 [2022-11-19 06:40:01,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:40:01,253 INFO L225 Difference]: With dead ends: 591 [2022-11-19 06:40:01,253 INFO L226 Difference]: Without dead ends: 406 [2022-11-19 06:40:01,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 162.8s TimeCoverageRelationStatistics Valid=192, Invalid=2888, Unknown=0, NotChecked=0, Total=3080 [2022-11-19 06:40:01,256 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 355 mSDsluCounter, 4680 mSDsCounter, 0 mSdLazyCounter, 6087 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 4927 SdHoareTripleChecker+Invalid, 6120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 6087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.5s IncrementalHoareTripleChecker+Time [2022-11-19 06:40:01,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [362 Valid, 4927 Invalid, 6120 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [33 Valid, 6087 Invalid, 0 Unknown, 0 Unchecked, 24.5s Time] [2022-11-19 06:40:01,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2022-11-19 06:40:01,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 303. [2022-11-19 06:40:01,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 213 states have (on average 1.4553990610328638) internal successors, (310), 215 states have internal predecessors, (310), 66 states have call successors, (66), 24 states have call predecessors, (66), 23 states have return successors, (66), 63 states have call predecessors, (66), 65 states have call successors, (66) [2022-11-19 06:40:01,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 442 transitions. [2022-11-19 06:40:01,442 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 442 transitions. Word has length 67 [2022-11-19 06:40:01,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:40:01,443 INFO L495 AbstractCegarLoop]: Abstraction has 303 states and 442 transitions. [2022-11-19 06:40:01,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 26 states have internal predecessors, (34), 14 states have call successors, (14), 8 states have call predecessors, (14), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-19 06:40:01,444 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 442 transitions. [2022-11-19 06:40:01,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-19 06:40:01,445 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:40:01,446 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:40:01,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b503b6cb-6ccc-408e-a37c-4278bde87b1a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 06:40:01,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b503b6cb-6ccc-408e-a37c-4278bde87b1a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:40:01,654 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:40:01,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:40:01,654 INFO L85 PathProgramCache]: Analyzing trace with hash -191795993, now seen corresponding path program 1 times [2022-11-19 06:40:01,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:40:01,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505080808] [2022-11-19 06:40:01,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:40:01,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:40:01,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:40:01,842 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 06:40:01,842 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:40:01,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505080808] [2022-11-19 06:40:01,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505080808] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:40:01,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840909536] [2022-11-19 06:40:01,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:40:01,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:40:01,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b503b6cb-6ccc-408e-a37c-4278bde87b1a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:40:01,844 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b503b6cb-6ccc-408e-a37c-4278bde87b1a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:40:01,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b503b6cb-6ccc-408e-a37c-4278bde87b1a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 06:40:02,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:40:02,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 1038 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 06:40:02,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:40:02,179 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 06:40:02,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:40:02,258 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 06:40:02,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840909536] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:40:02,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1524554512] [2022-11-19 06:40:02,262 INFO L159 IcfgInterpreter]: Started Sifa with 59 locations of interest [2022-11-19 06:40:02,263 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:40:02,263 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:40:02,263 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:40:02,264 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:40:39,673 INFO L197 IcfgInterpreter]: Interpreting procedure setClientId with input of size 444 for LOIs [2022-11-19 06:40:39,941 INFO L197 IcfgInterpreter]: Interpreting procedure setClientPrivateKey with input of size 441 for LOIs [2022-11-19 06:40:40,211 INFO L197 IcfgInterpreter]: Interpreting procedure sendEmail with input of size 259 for LOIs [2022-11-19 06:40:41,687 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailTo with input of size 237 for LOIs [2022-11-19 06:40:41,723 INFO L197 IcfgInterpreter]: Interpreting procedure outgoing with input of size 259 for LOIs [2022-11-19 06:41:11,922 INFO L197 IcfgInterpreter]: Interpreting procedure isReadable with input of size 440 for LOIs [2022-11-19 06:41:12,389 INFO L197 IcfgInterpreter]: Interpreting procedure getEmailTo with input of size 251 for LOIs [2022-11-19 06:41:12,433 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailFrom with input of size 444 for LOIs [2022-11-19 06:41:13,065 INFO L197 IcfgInterpreter]: Interpreting procedure isSigned with input of size 251 for LOIs [2022-11-19 06:41:13,106 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:41:30,940 WARN L233 SmtUtils]: Spent 5.16s on a formula simplification. DAG size of input: 467 DAG size of output: 264 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:41:54,770 WARN L233 SmtUtils]: Spent 5.56s on a formula simplification. DAG size of input: 492 DAG size of output: 304 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:42:20,839 WARN L233 SmtUtils]: Spent 7.72s on a formula simplification. DAG size of input: 566 DAG size of output: 390 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:42:28,969 WARN L233 SmtUtils]: Spent 7.80s on a formula simplification. DAG size of input: 570 DAG size of output: 394 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:43:12,201 WARN L233 SmtUtils]: Spent 6.07s on a formula simplification. DAG size of input: 567 DAG size of output: 380 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:43:21,453 WARN L233 SmtUtils]: Spent 6.59s on a formula simplification. DAG size of input: 440 DAG size of output: 341 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:43:28,741 WARN L233 SmtUtils]: Spent 6.69s on a formula simplification. DAG size of input: 446 DAG size of output: 348 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:43:51,861 WARN L233 SmtUtils]: Spent 11.18s on a formula simplification. DAG size of input: 609 DAG size of output: 429 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:43:57,690 WARN L233 SmtUtils]: Spent 5.10s on a formula simplification. DAG size of input: 609 DAG size of output: 382 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:44:06,606 WARN L233 SmtUtils]: Spent 8.17s on a formula simplification. DAG size of input: 607 DAG size of output: 423 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:44:16,719 WARN L233 SmtUtils]: Spent 9.31s on a formula simplification. DAG size of input: 671 DAG size of output: 466 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:44:27,355 WARN L233 SmtUtils]: Spent 9.82s on a formula simplification. DAG size of input: 693 DAG size of output: 488 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:44:34,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1524554512] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:44:34,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:44:34,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [4, 4, 4] total 57 [2022-11-19 06:44:34,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739250306] [2022-11-19 06:44:34,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:44:34,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-19 06:44:34,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:44:34,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-19 06:44:34,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=3008, Unknown=0, NotChecked=0, Total=3192 [2022-11-19 06:44:34,706 INFO L87 Difference]: Start difference. First operand 303 states and 442 transitions. Second operand has 52 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 32 states have internal predecessors, (37), 15 states have call successors, (15), 9 states have call predecessors, (15), 7 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-19 06:45:37,837 WARN L233 SmtUtils]: Spent 8.46s on a formula simplification. DAG size of input: 601 DAG size of output: 488 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:45:47,190 WARN L233 SmtUtils]: Spent 8.44s on a formula simplification. DAG size of input: 601 DAG size of output: 488 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:45:54,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:45:54,499 INFO L93 Difference]: Finished difference Result 426 states and 639 transitions. [2022-11-19 06:45:54,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-19 06:45:54,500 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 32 states have internal predecessors, (37), 15 states have call successors, (15), 9 states have call predecessors, (15), 7 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 72 [2022-11-19 06:45:54,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:45:54,504 INFO L225 Difference]: With dead ends: 426 [2022-11-19 06:45:54,504 INFO L226 Difference]: Without dead ends: 424 [2022-11-19 06:45:54,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 896 ImplicationChecksByTransitivity, 252.4s TimeCoverageRelationStatistics Valid=271, Invalid=4151, Unknown=0, NotChecked=0, Total=4422 [2022-11-19 06:45:54,506 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 413 mSDsluCounter, 5041 mSDsCounter, 0 mSdLazyCounter, 7100 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 5285 SdHoareTripleChecker+Invalid, 7123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 7100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:45:54,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [421 Valid, 5285 Invalid, 7123 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [23 Valid, 7100 Invalid, 0 Unknown, 0 Unchecked, 28.1s Time] [2022-11-19 06:45:54,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2022-11-19 06:45:54,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 312. [2022-11-19 06:45:54,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 219 states have (on average 1.447488584474886) internal successors, (317), 221 states have internal predecessors, (317), 67 states have call successors, (67), 26 states have call predecessors, (67), 25 states have return successors, (67), 64 states have call predecessors, (67), 66 states have call successors, (67) [2022-11-19 06:45:54,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 451 transitions. [2022-11-19 06:45:54,738 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 451 transitions. Word has length 72 [2022-11-19 06:45:54,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:45:54,738 INFO L495 AbstractCegarLoop]: Abstraction has 312 states and 451 transitions. [2022-11-19 06:45:54,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 32 states have internal predecessors, (37), 15 states have call successors, (15), 9 states have call predecessors, (15), 7 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-19 06:45:54,739 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 451 transitions. [2022-11-19 06:45:54,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-19 06:45:54,741 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:45:54,741 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:45:54,747 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b503b6cb-6ccc-408e-a37c-4278bde87b1a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-19 06:45:54,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b503b6cb-6ccc-408e-a37c-4278bde87b1a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:45:54,947 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:45:54,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:45:54,947 INFO L85 PathProgramCache]: Analyzing trace with hash -853274321, now seen corresponding path program 1 times [2022-11-19 06:45:54,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:45:54,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805933630] [2022-11-19 06:45:54,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:45:54,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:45:54,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:45:55,030 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-19 06:45:55,031 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:45:55,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805933630] [2022-11-19 06:45:55,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805933630] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:45:55,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:45:55,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:45:55,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310270102] [2022-11-19 06:45:55,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:45:55,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:45:55,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:45:55,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:45:55,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:45:55,034 INFO L87 Difference]: Start difference. First operand 312 states and 451 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-19 06:45:55,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:45:55,471 INFO L93 Difference]: Finished difference Result 697 states and 1036 transitions. [2022-11-19 06:45:55,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:45:55,473 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 72 [2022-11-19 06:45:55,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:45:55,476 INFO L225 Difference]: With dead ends: 697 [2022-11-19 06:45:55,476 INFO L226 Difference]: Without dead ends: 427 [2022-11-19 06:45:55,478 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 [2022-11-19 06:45:55,478 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 55 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:45:55,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 394 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:45:55,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2022-11-19 06:45:55,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 420. [2022-11-19 06:45:55,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 302 states have (on average 1.4801324503311257) internal successors, (447), 304 states have internal predecessors, (447), 92 states have call successors, (92), 26 states have call predecessors, (92), 25 states have return successors, (92), 89 states have call predecessors, (92), 91 states have call successors, (92) [2022-11-19 06:45:55,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 631 transitions. [2022-11-19 06:45:55,769 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 631 transitions. Word has length 72 [2022-11-19 06:45:55,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:45:55,770 INFO L495 AbstractCegarLoop]: Abstraction has 420 states and 631 transitions. [2022-11-19 06:45:55,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-19 06:45:55,770 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 631 transitions. [2022-11-19 06:45:55,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-19 06:45:55,772 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:45:55,772 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:45:55,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 06:45:55,773 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:45:55,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:45:55,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1853148361, now seen corresponding path program 1 times [2022-11-19 06:45:55,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:45:55,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345430711] [2022-11-19 06:45:55,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:45:55,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:45:55,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:45:55,889 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-19 06:45:55,889 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:45:55,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345430711] [2022-11-19 06:45:55,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345430711] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:45:55,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21088210] [2022-11-19 06:45:55,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:45:55,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:45:55,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b503b6cb-6ccc-408e-a37c-4278bde87b1a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:45:55,892 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b503b6cb-6ccc-408e-a37c-4278bde87b1a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:45:55,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b503b6cb-6ccc-408e-a37c-4278bde87b1a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 06:45:56,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:45:56,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 1045 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 06:45:56,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:45:56,208 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-19 06:45:56,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:45:56,272 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-19 06:45:56,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21088210] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:45:56,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [852083332] [2022-11-19 06:45:56,282 INFO L159 IcfgInterpreter]: Started Sifa with 58 locations of interest [2022-11-19 06:45:56,283 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:45:56,283 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:45:56,283 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:45:56,284 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:46:42,876 INFO L197 IcfgInterpreter]: Interpreting procedure setClientId with input of size 439 for LOIs [2022-11-19 06:46:43,135 INFO L197 IcfgInterpreter]: Interpreting procedure setClientPrivateKey with input of size 450 for LOIs [2022-11-19 06:46:43,401 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:47:24,433 WARN L233 SmtUtils]: Spent 5.54s on a formula simplification. DAG size of input: 492 DAG size of output: 304 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:47:47,881 WARN L233 SmtUtils]: Spent 12.69s on a formula simplification. DAG size of input: 593 DAG size of output: 335 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:48:01,667 WARN L233 SmtUtils]: Spent 10.93s on a formula simplification. DAG size of input: 578 DAG size of output: 439 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:48:10,219 WARN L233 SmtUtils]: Spent 8.17s on a formula simplification. DAG size of input: 580 DAG size of output: 321 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:48:18,694 WARN L233 SmtUtils]: Spent 8.08s on a formula simplification. DAG size of input: 578 DAG size of output: 319 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:48:26,634 WARN L233 SmtUtils]: Spent 7.50s on a formula simplification. DAG size of input: 551 DAG size of output: 398 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:48:34,618 WARN L233 SmtUtils]: Spent 7.58s on a formula simplification. DAG size of input: 553 DAG size of output: 400 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:48:41,115 WARN L233 SmtUtils]: Spent 6.00s on a formula simplification. DAG size of input: 584 DAG size of output: 328 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:48:41,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [852083332] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:48:41,125 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:48:41,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [4, 4, 4] total 30 [2022-11-19 06:48:41,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876384992] [2022-11-19 06:48:41,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:48:41,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-19 06:48:41,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:48:41,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-19 06:48:41,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2022-11-19 06:48:41,127 INFO L87 Difference]: Start difference. First operand 420 states and 631 transitions. Second operand has 25 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 8 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 8 states have call predecessors, (13), 8 states have call successors, (13) [2022-11-19 06:48:47,825 WARN L233 SmtUtils]: Spent 5.33s on a formula simplification. DAG size of input: 338 DAG size of output: 334 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:48:59,470 WARN L233 SmtUtils]: Spent 6.71s on a formula simplification. DAG size of input: 552 DAG size of output: 366 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:49:16,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:49:16,736 INFO L93 Difference]: Finished difference Result 804 states and 1252 transitions. [2022-11-19 06:49:16,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-19 06:49:16,740 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 8 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 8 states have call predecessors, (13), 8 states have call successors, (13) Word has length 73 [2022-11-19 06:49:16,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:49:16,743 INFO L225 Difference]: With dead ends: 804 [2022-11-19 06:49:16,743 INFO L226 Difference]: Without dead ends: 529 [2022-11-19 06:49:16,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 143.5s TimeCoverageRelationStatistics Valid=197, Invalid=1135, Unknown=0, NotChecked=0, Total=1332 [2022-11-19 06:49:16,745 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 175 mSDsluCounter, 2669 mSDsCounter, 0 mSdLazyCounter, 2153 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 2868 SdHoareTripleChecker+Invalid, 2167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 2153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:49:16,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 2868 Invalid, 2167 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 2153 Invalid, 0 Unknown, 0 Unchecked, 9.0s Time] [2022-11-19 06:49:16,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2022-11-19 06:49:17,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 476. [2022-11-19 06:49:17,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 355 states have (on average 1.495774647887324) internal successors, (531), 358 states have internal predecessors, (531), 94 states have call successors, (94), 27 states have call predecessors, (94), 26 states have return successors, (94), 90 states have call predecessors, (94), 93 states have call successors, (94) [2022-11-19 06:49:17,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 719 transitions. [2022-11-19 06:49:17,131 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 719 transitions. Word has length 73 [2022-11-19 06:49:17,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:49:17,131 INFO L495 AbstractCegarLoop]: Abstraction has 476 states and 719 transitions. [2022-11-19 06:49:17,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 8 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 8 states have call predecessors, (13), 8 states have call successors, (13) [2022-11-19 06:49:17,132 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 719 transitions. [2022-11-19 06:49:17,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-19 06:49:17,135 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:49:17,135 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:49:17,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b503b6cb-6ccc-408e-a37c-4278bde87b1a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 06:49:17,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b503b6cb-6ccc-408e-a37c-4278bde87b1a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:49:17,342 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:49:17,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:49:17,342 INFO L85 PathProgramCache]: Analyzing trace with hash -359438666, now seen corresponding path program 1 times [2022-11-19 06:49:17,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:49:17,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293165039] [2022-11-19 06:49:17,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:49:17,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:49:17,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:49:17,491 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 06:49:17,492 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:49:17,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293165039] [2022-11-19 06:49:17,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293165039] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:49:17,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463526356] [2022-11-19 06:49:17,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:49:17,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:49:17,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b503b6cb-6ccc-408e-a37c-4278bde87b1a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:49:17,494 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b503b6cb-6ccc-408e-a37c-4278bde87b1a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:49:17,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b503b6cb-6ccc-408e-a37c-4278bde87b1a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 06:49:17,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:49:17,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 1067 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 06:49:17,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:49:17,830 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 06:49:17,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:49:17,891 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 06:49:17,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463526356] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:49:17,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [757139798] [2022-11-19 06:49:17,899 INFO L159 IcfgInterpreter]: Started Sifa with 64 locations of interest [2022-11-19 06:49:17,899 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:49:17,901 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:49:17,901 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:49:17,901 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs