./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec3_product30.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a520053-873f-408d-9b07-8c76060fb0d6/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a520053-873f-408d-9b07-8c76060fb0d6/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a520053-873f-408d-9b07-8c76060fb0d6/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a520053-873f-408d-9b07-8c76060fb0d6/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec3_product30.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a520053-873f-408d-9b07-8c76060fb0d6/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a520053-873f-408d-9b07-8c76060fb0d6/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bcbcb0270b2ee5ae38e5dd3a933d2995b5c0488c9590f16a6543c0c656cfb023 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:52:18,519 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:52:18,521 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:52:18,552 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:52:18,553 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:52:18,555 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:52:18,556 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:52:18,559 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:52:18,561 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:52:18,562 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:52:18,563 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:52:18,564 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:52:18,565 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:52:18,566 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:52:18,568 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:52:18,569 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:52:18,570 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:52:18,571 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:52:18,574 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:52:18,576 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:52:18,578 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:52:18,582 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:52:18,583 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:52:18,584 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:52:18,589 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:52:18,600 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:52:18,601 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:52:18,602 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:52:18,603 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:52:18,604 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:52:18,604 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:52:18,605 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:52:18,606 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:52:18,607 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:52:18,610 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:52:18,611 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:52:18,612 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:52:18,613 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:52:18,614 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:52:18,615 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:52:18,616 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:52:18,617 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a520053-873f-408d-9b07-8c76060fb0d6/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 03:52:18,664 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:52:18,665 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:52:18,666 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:52:18,666 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:52:18,673 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:52:18,674 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:52:18,674 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:52:18,674 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:52:18,674 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:52:18,674 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:52:18,675 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:52:18,676 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:52:18,676 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:52:18,676 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:52:18,676 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:52:18,677 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:52:18,677 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:52:18,677 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:52:18,678 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:52:18,678 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:52:18,679 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:52:18,679 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:52:18,679 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:52:18,679 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:52:18,680 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:52:18,680 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:52:18,681 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:52:18,682 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:52:18,682 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:52:18,682 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:52:18,682 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:52:18,683 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:52:18,683 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:52:18,683 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:52:18,683 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:52:18,684 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:52:18,684 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:52:18,684 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:52:18,684 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:52:18,684 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:52:18,685 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:52:18,685 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a520053-873f-408d-9b07-8c76060fb0d6/bin/utaipan-EQgc7hIp5V/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a520053-873f-408d-9b07-8c76060fb0d6/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bcbcb0270b2ee5ae38e5dd3a933d2995b5c0488c9590f16a6543c0c656cfb023 [2021-11-23 03:52:18,951 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:52:18,978 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:52:18,981 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:52:18,982 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:52:18,982 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:52:18,984 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a520053-873f-408d-9b07-8c76060fb0d6/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/product-lines/email_spec3_product30.cil.c [2021-11-23 03:52:19,055 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a520053-873f-408d-9b07-8c76060fb0d6/bin/utaipan-EQgc7hIp5V/data/1acb950b6/7d5e8cb3bde54e978bbe8ff50032cfb3/FLAG7af316744 [2021-11-23 03:52:19,809 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:52:19,811 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a520053-873f-408d-9b07-8c76060fb0d6/sv-benchmarks/c/product-lines/email_spec3_product30.cil.c [2021-11-23 03:52:19,829 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a520053-873f-408d-9b07-8c76060fb0d6/bin/utaipan-EQgc7hIp5V/data/1acb950b6/7d5e8cb3bde54e978bbe8ff50032cfb3/FLAG7af316744 [2021-11-23 03:52:20,027 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a520053-873f-408d-9b07-8c76060fb0d6/bin/utaipan-EQgc7hIp5V/data/1acb950b6/7d5e8cb3bde54e978bbe8ff50032cfb3 [2021-11-23 03:52:20,030 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:52:20,032 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:52:20,033 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:52:20,033 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:52:20,037 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:52:20,037 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:52:20" (1/1) ... [2021-11-23 03:52:20,038 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c06617 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:52:20, skipping insertion in model container [2021-11-23 03:52:20,039 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:52:20" (1/1) ... [2021-11-23 03:52:20,046 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:52:20,113 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:52:20,345 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a520053-873f-408d-9b07-8c76060fb0d6/sv-benchmarks/c/product-lines/email_spec3_product30.cil.c[5243,5256] [2021-11-23 03:52:20,747 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:52:20,757 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:52:20,774 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a520053-873f-408d-9b07-8c76060fb0d6/sv-benchmarks/c/product-lines/email_spec3_product30.cil.c[5243,5256] [2021-11-23 03:52:20,842 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:52:20,927 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:52:20,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:52:20 WrapperNode [2021-11-23 03:52:20,928 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:52:20,929 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:52:20,930 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:52:20,930 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:52:20,937 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:52:20" (1/1) ... [2021-11-23 03:52:21,001 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:52:20" (1/1) ... [2021-11-23 03:52:21,059 INFO L137 Inliner]: procedures = 132, calls = 227, calls flagged for inlining = 60, calls inlined = 50, statements flattened = 941 [2021-11-23 03:52:21,060 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:52:21,061 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:52:21,061 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:52:21,061 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:52:21,070 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:52:20" (1/1) ... [2021-11-23 03:52:21,070 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:52:20" (1/1) ... [2021-11-23 03:52:21,078 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:52:20" (1/1) ... [2021-11-23 03:52:21,078 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:52:20" (1/1) ... [2021-11-23 03:52:21,101 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:52:20" (1/1) ... [2021-11-23 03:52:21,112 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:52:20" (1/1) ... [2021-11-23 03:52:21,119 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:52:20" (1/1) ... [2021-11-23 03:52:21,128 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:52:21,129 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:52:21,129 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:52:21,129 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:52:21,130 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:52:20" (1/1) ... [2021-11-23 03:52:21,138 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:52:21,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a520053-873f-408d-9b07-8c76060fb0d6/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:52:21,164 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a520053-873f-408d-9b07-8c76060fb0d6/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:52:21,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a520053-873f-408d-9b07-8c76060fb0d6/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:52:21,215 INFO L130 BoogieDeclarations]: Found specification of procedure getClientPrivateKey [2021-11-23 03:52:21,216 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientPrivateKey [2021-11-23 03:52:21,217 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailEncryptionKey [2021-11-23 03:52:21,217 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailEncryptionKey [2021-11-23 03:52:21,217 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailEncryptionKey [2021-11-23 03:52:21,217 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailEncryptionKey [2021-11-23 03:52:21,217 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailTo [2021-11-23 03:52:21,218 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailTo [2021-11-23 03:52:21,218 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailFrom [2021-11-23 03:52:21,218 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailFrom [2021-11-23 03:52:21,218 INFO L130 BoogieDeclarations]: Found specification of procedure isReadable [2021-11-23 03:52:21,218 INFO L138 BoogieDeclarations]: Found implementation of procedure isReadable [2021-11-23 03:52:21,219 INFO L130 BoogieDeclarations]: Found specification of procedure createClientKeyringEntry [2021-11-23 03:52:21,219 INFO L138 BoogieDeclarations]: Found implementation of procedure createClientKeyringEntry [2021-11-23 03:52:21,219 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailIsEncrypted [2021-11-23 03:52:21,219 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailIsEncrypted [2021-11-23 03:52:21,219 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailSignKey [2021-11-23 03:52:21,220 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailSignKey [2021-11-23 03:52:21,220 INFO L130 BoogieDeclarations]: Found specification of procedure chuckKeyAdd [2021-11-23 03:52:21,220 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckKeyAdd [2021-11-23 03:52:21,220 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-23 03:52:21,220 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailFrom [2021-11-23 03:52:21,221 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailFrom [2021-11-23 03:52:21,221 INFO L130 BoogieDeclarations]: Found specification of procedure setClientId [2021-11-23 03:52:21,221 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientId [2021-11-23 03:52:21,221 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:52:21,222 INFO L130 BoogieDeclarations]: Found specification of procedure isSigned [2021-11-23 03:52:21,222 INFO L138 BoogieDeclarations]: Found implementation of procedure isSigned [2021-11-23 03:52:21,222 INFO L130 BoogieDeclarations]: Found specification of procedure isKeyPairValid [2021-11-23 03:52:21,222 INFO L138 BoogieDeclarations]: Found implementation of procedure isKeyPairValid [2021-11-23 03:52:21,223 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringUser [2021-11-23 03:52:21,225 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringUser [2021-11-23 03:52:21,225 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-23 03:52:21,225 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-23 03:52:21,226 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringPublicKey [2021-11-23 03:52:21,226 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringPublicKey [2021-11-23 03:52:21,226 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing [2021-11-23 03:52:21,226 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing [2021-11-23 03:52:21,226 INFO L130 BoogieDeclarations]: Found specification of procedure findPublicKey [2021-11-23 03:52:21,226 INFO L138 BoogieDeclarations]: Found implementation of procedure findPublicKey [2021-11-23 03:52:21,227 INFO L130 BoogieDeclarations]: Found specification of procedure sendEmail [2021-11-23 03:52:21,227 INFO L138 BoogieDeclarations]: Found implementation of procedure sendEmail [2021-11-23 03:52:21,227 INFO L130 BoogieDeclarations]: Found specification of procedure isEncrypted [2021-11-23 03:52:21,228 INFO L138 BoogieDeclarations]: Found implementation of procedure isEncrypted [2021-11-23 03:52:21,228 INFO L130 BoogieDeclarations]: Found specification of procedure setClientPrivateKey [2021-11-23 03:52:21,229 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientPrivateKey [2021-11-23 03:52:21,229 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailTo [2021-11-23 03:52:21,230 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailTo [2021-11-23 03:52:21,230 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:52:21,231 INFO L130 BoogieDeclarations]: Found specification of procedure generateKeyPair [2021-11-23 03:52:21,232 INFO L138 BoogieDeclarations]: Found implementation of procedure generateKeyPair [2021-11-23 03:52:21,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:52:21,232 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:52:21,511 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:52:21,513 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:52:22,210 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:52:22,546 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:52:22,546 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 03:52:22,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:52:22 BoogieIcfgContainer [2021-11-23 03:52:22,549 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:52:22,551 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:52:22,551 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:52:22,554 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:52:22,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:52:20" (1/3) ... [2021-11-23 03:52:22,555 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6120f382 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:52:22, skipping insertion in model container [2021-11-23 03:52:22,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:52:20" (2/3) ... [2021-11-23 03:52:22,556 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6120f382 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:52:22, skipping insertion in model container [2021-11-23 03:52:22,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:52:22" (3/3) ... [2021-11-23 03:52:22,557 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec3_product30.cil.c [2021-11-23 03:52:22,562 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:52:22,563 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 03:52:22,612 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:52:22,642 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 03:52:22,643 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 03:52:22,666 INFO L276 IsEmpty]: Start isEmpty. Operand has 199 states, 115 states have (on average 1.3304347826086957) internal successors, (153), 121 states have internal predecessors, (153), 58 states have call successors, (58), 24 states have call predecessors, (58), 24 states have return successors, (58), 57 states have call predecessors, (58), 58 states have call successors, (58) [2021-11-23 03:52:22,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-23 03:52:22,679 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:52:22,679 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:52:22,680 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:52:22,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:52:22,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1005377576, now seen corresponding path program 1 times [2021-11-23 03:52:22,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:52:22,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404986820] [2021-11-23 03:52:22,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:52:22,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:52:22,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:52:23,111 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-23 03:52:23,112 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:52:23,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404986820] [2021-11-23 03:52:23,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404986820] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:52:23,113 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:52:23,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:52:23,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292784963] [2021-11-23 03:52:23,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:52:23,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 03:52:23,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:52:23,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 03:52:23,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 03:52:23,154 INFO L87 Difference]: Start difference. First operand has 199 states, 115 states have (on average 1.3304347826086957) internal successors, (153), 121 states have internal predecessors, (153), 58 states have call successors, (58), 24 states have call predecessors, (58), 24 states have return successors, (58), 57 states have call predecessors, (58), 58 states have call successors, (58) Second operand has 2 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-23 03:52:23,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:52:23,283 INFO L93 Difference]: Finished difference Result 314 states and 416 transitions. [2021-11-23 03:52:23,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 03:52:23,286 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 83 [2021-11-23 03:52:23,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:52:23,299 INFO L225 Difference]: With dead ends: 314 [2021-11-23 03:52:23,299 INFO L226 Difference]: Without dead ends: 195 [2021-11-23 03:52:23,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 03:52:23,308 INFO L933 BasicCegarLoop]: 229 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:52:23,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 229 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:52:23,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-11-23 03:52:23,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2021-11-23 03:52:23,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 113 states have (on average 1.3008849557522124) internal successors, (147), 117 states have internal predecessors, (147), 58 states have call successors, (58), 24 states have call predecessors, (58), 23 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2021-11-23 03:52:23,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 260 transitions. [2021-11-23 03:52:23,412 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 260 transitions. Word has length 83 [2021-11-23 03:52:23,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:52:23,414 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 260 transitions. [2021-11-23 03:52:23,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-23 03:52:23,415 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 260 transitions. [2021-11-23 03:52:23,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-23 03:52:23,431 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:52:23,431 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:52:23,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 03:52:23,432 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:52:23,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:52:23,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1193072311, now seen corresponding path program 1 times [2021-11-23 03:52:23,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:52:23,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996779186] [2021-11-23 03:52:23,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:52:23,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:52:23,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:52:23,658 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-23 03:52:23,659 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:52:23,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996779186] [2021-11-23 03:52:23,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996779186] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:52:23,660 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:52:23,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:52:23,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111078033] [2021-11-23 03:52:23,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:52:23,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:52:23,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:52:23,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:52:23,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:52:23,668 INFO L87 Difference]: Start difference. First operand 195 states and 260 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-23 03:52:23,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:52:23,846 INFO L93 Difference]: Finished difference Result 309 states and 400 transitions. [2021-11-23 03:52:23,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:52:23,847 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 84 [2021-11-23 03:52:23,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:52:23,852 INFO L225 Difference]: With dead ends: 309 [2021-11-23 03:52:23,853 INFO L226 Difference]: Without dead ends: 197 [2021-11-23 03:52:23,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:52:23,862 INFO L933 BasicCegarLoop]: 226 mSDtfsCounter, 0 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:52:23,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 451 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:52:23,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-11-23 03:52:23,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2021-11-23 03:52:23,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 115 states have (on average 1.2956521739130435) internal successors, (149), 119 states have internal predecessors, (149), 58 states have call successors, (58), 24 states have call predecessors, (58), 23 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2021-11-23 03:52:23,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 262 transitions. [2021-11-23 03:52:23,890 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 262 transitions. Word has length 84 [2021-11-23 03:52:23,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:52:23,891 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 262 transitions. [2021-11-23 03:52:23,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-23 03:52:23,892 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 262 transitions. [2021-11-23 03:52:23,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-23 03:52:23,896 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:52:23,896 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:52:23,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 03:52:23,897 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:52:23,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:52:23,898 INFO L85 PathProgramCache]: Analyzing trace with hash -698658165, now seen corresponding path program 1 times [2021-11-23 03:52:23,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:52:23,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792449918] [2021-11-23 03:52:23,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:52:23,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:52:23,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:52:24,000 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-23 03:52:24,001 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:52:24,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792449918] [2021-11-23 03:52:24,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792449918] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:52:24,001 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:52:24,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:52:24,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048517030] [2021-11-23 03:52:24,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:52:24,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:52:24,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:52:24,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:52:24,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:52:24,004 INFO L87 Difference]: Start difference. First operand 197 states and 262 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-23 03:52:24,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:52:24,169 INFO L93 Difference]: Finished difference Result 424 states and 583 transitions. [2021-11-23 03:52:24,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:52:24,170 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 89 [2021-11-23 03:52:24,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:52:24,176 INFO L225 Difference]: With dead ends: 424 [2021-11-23 03:52:24,176 INFO L226 Difference]: Without dead ends: 245 [2021-11-23 03:52:24,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:52:24,183 INFO L933 BasicCegarLoop]: 246 mSDtfsCounter, 57 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:52:24,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 468 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:52:24,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-11-23 03:52:24,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 240. [2021-11-23 03:52:24,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 147 states have (on average 1.3741496598639455) internal successors, (202), 151 states have internal predecessors, (202), 69 states have call successors, (69), 24 states have call predecessors, (69), 23 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2021-11-23 03:52:24,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 337 transitions. [2021-11-23 03:52:24,221 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 337 transitions. Word has length 89 [2021-11-23 03:52:24,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:52:24,223 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 337 transitions. [2021-11-23 03:52:24,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-23 03:52:24,223 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 337 transitions. [2021-11-23 03:52:24,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-23 03:52:24,229 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:52:24,229 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:52:24,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 03:52:24,230 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:52:24,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:52:24,231 INFO L85 PathProgramCache]: Analyzing trace with hash -640980498, now seen corresponding path program 1 times [2021-11-23 03:52:24,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:52:24,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483978449] [2021-11-23 03:52:24,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:52:24,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:52:24,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:52:24,369 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-23 03:52:24,370 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:52:24,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483978449] [2021-11-23 03:52:24,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483978449] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:52:24,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099607201] [2021-11-23 03:52:24,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:52:24,371 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:52:24,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a520053-873f-408d-9b07-8c76060fb0d6/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:52:24,374 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a520053-873f-408d-9b07-8c76060fb0d6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:52:24,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a520053-873f-408d-9b07-8c76060fb0d6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 03:52:24,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:52:24,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 1133 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:52:24,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:52:24,922 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-23 03:52:24,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:52:25,175 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-23 03:52:25,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099607201] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:52:25,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1654582142] [2021-11-23 03:52:25,198 INFO L159 IcfgInterpreter]: Started Sifa with 73 locations of interest [2021-11-23 03:52:25,198 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:52:25,203 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:52:25,208 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:52:25,208 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:53:02,742 INFO L197 IcfgInterpreter]: Interpreting procedure setClientId with input of size 443 for LOIs [2021-11-23 03:53:03,018 INFO L197 IcfgInterpreter]: Interpreting procedure sendEmail with input of size 482 for LOIs [2021-11-23 03:53:31,643 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailTo with input of size 450 for LOIs [2021-11-23 03:53:31,887 INFO L197 IcfgInterpreter]: Interpreting procedure setClientPrivateKey with input of size 445 for LOIs [2021-11-23 03:53:32,141 INFO L197 IcfgInterpreter]: Interpreting procedure outgoing with input of size 480 for LOIs [2021-11-23 03:54:26,390 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 423 for LOIs [2021-11-23 03:54:26,485 INFO L197 IcfgInterpreter]: Interpreting procedure getClientPrivateKey with input of size 439 for LOIs [2021-11-23 03:54:26,760 INFO L197 IcfgInterpreter]: Interpreting procedure findPublicKey with input of size 430 for LOIs [2021-11-23 03:54:27,078 INFO L197 IcfgInterpreter]: Interpreting procedure getEmailFrom with input of size 252 for LOIs [2021-11-23 03:54:27,135 INFO L197 IcfgInterpreter]: Interpreting procedure getEmailTo with input of size 250 for LOIs [2021-11-23 03:54:27,193 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailFrom with input of size 453 for LOIs [2021-11-23 03:54:27,841 INFO L197 IcfgInterpreter]: Interpreting procedure isSigned with input of size 254 for LOIs [2021-11-23 03:54:27,910 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:54:56,742 WARN L227 SmtUtils]: Spent 6.14s on a formula simplification. DAG size of input: 468 DAG size of output: 353 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:55:02,101 WARN L227 SmtUtils]: Spent 5.08s on a formula simplification. DAG size of input: 480 DAG size of output: 324 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:55:09,741 WARN L227 SmtUtils]: Spent 6.46s on a formula simplification. DAG size of input: 490 DAG size of output: 356 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:55:20,422 WARN L227 SmtUtils]: Spent 5.74s on a formula simplification. DAG size of input: 512 DAG size of output: 337 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:55:28,840 WARN L227 SmtUtils]: Spent 6.89s on a formula simplification. DAG size of input: 559 DAG size of output: 398 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:55:36,143 WARN L227 SmtUtils]: Spent 6.99s on a formula simplification. DAG size of input: 561 DAG size of output: 400 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:55:57,792 WARN L227 SmtUtils]: Spent 7.70s on a formula simplification. DAG size of input: 560 DAG size of output: 399 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:56:21,098 WARN L227 SmtUtils]: Spent 7.74s on a formula simplification. DAG size of input: 547 DAG size of output: 409 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:56:34,814 WARN L227 SmtUtils]: Spent 5.67s on a formula simplification. DAG size of input: 543 DAG size of output: 319 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:56:40,565 WARN L227 SmtUtils]: Spent 5.05s on a formula simplification. DAG size of input: 556 DAG size of output: 334 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:57:38,235 WARN L227 SmtUtils]: Spent 8.17s on a formula simplification. DAG size of input: 602 DAG size of output: 483 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:57:47,058 WARN L227 SmtUtils]: Spent 8.18s on a formula simplification. DAG size of input: 603 DAG size of output: 484 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:57:53,161 WARN L227 SmtUtils]: Spent 5.43s on a formula simplification. DAG size of input: 610 DAG size of output: 413 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:57:59,404 WARN L227 SmtUtils]: Spent 5.53s on a formula simplification. DAG size of input: 618 DAG size of output: 421 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:58:26,073 WARN L227 SmtUtils]: Spent 8.28s on a formula simplification. DAG size of input: 685 DAG size of output: 507 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:58:32,846 WARN L227 SmtUtils]: Spent 5.90s on a formula simplification. DAG size of input: 685 DAG size of output: 468 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:58:40,776 WARN L227 SmtUtils]: Spent 7.00s on a formula simplification. DAG size of input: 688 DAG size of output: 484 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:58:48,739 WARN L227 SmtUtils]: Spent 7.05s on a formula simplification. DAG size of input: 690 DAG size of output: 486 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:58:49,709 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3446#(and (= ~__ste_Client_Keyring1_User2~0 0) (= ~__GUIDSL_NON_TERMINAL_main~0 0) (= ~__ste_email_subject0~0.offset 0) (<= 0 ~__ste_email_encryptionKey1~0) (= ~__SELECTED_FEATURE_Sign~0 0) (= 0 ~__ste_Client_AddressBook0_Address2~0) (= ~__ste_client_outbuffer3~0 0) (= ~__ste_Client_counter~0 0) (= ~__ste_Client_Keyring1_PublicKey2~0 0) (<= ~__ste_email_encryptionKey1~0 0) (<= ~__ste_email_isSignatureVerified1~0 0) (= ~__ste_Client_AddressBook2_Alias0~0 0) (= 0 ~__ste_email_subject0~0.base) (= ~__ste_Client_AddressBook2_Alias1~0 0) (= ~__ste_Client_Keyring2_PublicKey2~0 0) (= ~__ste_client_forwardReceiver3~0 0) (= ~__ste_client_name2~0.offset 0) (= ~__ste_client_name1~0.base 0) (<= 0 ~__ste_client_autoResponse1~0) (= ~__SELECTED_FEATURE_Verify~0 0) (= ~__ste_Client_Keyring1_User0~0 0) (<= ~__ste_client_idCounter2~0 3) (<= ~queued_message~0 0) (<= ~__ste_email_isSignatureVerified0~0 0) (= ~__ste_email_body1~0.offset 0) (= ~__SELECTED_FEATURE_Encrypt~0 0) (= ~__ste_Client_AddressBook1_Address2~0 0) (<= ~__ste_email_from0~0 2147483647) (= ~__ste_ClientAddressBook_size1~0 0) (= ~__ste_Client_Keyring0_PublicKey0~0 0) (= ~__ste_Email_counter~0 0) (= ~__ste_ClientKeyring_size1~0 0) (= ~__ste_email_body0~0.offset 0) (<= 0 ~__ste_email_isSigned1~0) (<= 0 (+ ~__ste_email_from0~0 2147483648)) (= ~__ste_Client_Keyring0_User2~0 0) (= ~__ste_ClientAddressBook_size0~0 0) (= ~__ste_Client_Keyring0_User1~0 0) (= ~__ste_Client_AddressBook1_Alias1~0 0) (= ~__ste_client_name1~0.offset 0) (= ~head~0.offset 0) (= ~__ste_client_name0~0.offset 0) (= ~__ste_Client_Keyring0_PublicKey2~0 0) (= ~sent_signed~0 1) (<= ~__ste_client_privateKey2~0 789) (= ~__ste_Client_Keyring1_PublicKey0~0 0) (<= ~queue_empty~0 1) (= ~__SELECTED_FEATURE_Decrypt~0 0) (<= 0 (+ ~__ste_email_signKey0~0 2147483648)) (<= 0 ~__ste_email_isEncrypted1~0) (= ~__SELECTED_FEATURE_Keys~0 0) (<= ~__ste_email_signKey0~0 2147483647) (= ~__SELECTED_FEATURE_AddressBook~0 0) (= ~__ste_client_forwardReceiver2~0 0) (= ~__ste_Client_Keyring0_PublicKey1~0 0) (= ~__SELECTED_FEATURE_Forward~0 0) (<= 0 ~__ste_email_isEncrypted0~0) (= ~__ste_Client_Keyring0_User0~0 0) (<= ~__ste_client_idCounter0~0 2147483647) (= ~__ste_Client_Keyring2_PublicKey1~0 0) (= ~__ste_email_body0~0.base 0) (<= ~__ste_email_isSigned0~0 1) (<= ~__ste_email_isEncrypted0~0 0) (= ~__ste_Client_AddressBook0_Alias0~0 0) (= ~__ste_email_id0~0 0) (<= ~__ste_client_autoResponse0~0 0) (= ~__ste_Client_Keyring2_User1~0 0) (<= 3 ~__ste_client_idCounter2~0) (= ~__ste_Client_AddressBook2_Address2~0 0) (= 3 ~chuck~0) (= ~__ste_Client_AddressBook2_Address1~0 0) (<= 0 ~__ste_email_signKey1~0) (<= 1 ~queue_empty~0) (<= ~__ste_email_signKey1~0 0) (<= ~__ste_email_isSigned1~0 0) (= ~bob~0 1) (= ~__ste_client_forwardReceiver1~0 0) (<= 0 ~__ste_client_autoResponse0~0) (<= 0 ~queued_message~0) (= ~__ste_Client_AddressBook1_Alias2~0 0) (<= 0 ~__ste_email_isSignatureVerified1~0) (= ~__ste_client_outbuffer0~0 0) (<= 789 ~__ste_client_privateKey2~0) (= ~__SELECTED_FEATURE_Base~0 0) (= ~__ste_client_forwardReceiver0~0 0) (= ~__ste_Client_Keyring2_User0~0 0) (= ~rjh~0 2) (= 0 ~__ste_Client_AddressBook0_Address1~0) (= ~__ste_Client_AddressBook2_Address0~0 0) (= ~__ste_Client_Keyring1_PublicKey1~0 0) (<= 0 ~queued_client~0) (= ~__ste_Client_Keyring2_PublicKey0~0 0) (<= 0 ~__ste_email_isSignatureVerified0~0) (= ~__ste_Client_AddressBook1_Address0~0 0) (= ~__ste_client_name2~0.base 0) (<= ~__ste_email_encryptionKey0~0 0) (= ~__ste_email_subject1~0.base 0) (= ~__ste_Client_AddressBook1_Alias0~0 0) (= ~__ste_Client_Keyring2_User2~0 0) (= ~head~0.base 0) (= ~__ste_Client_Keyring1_User1~0 0) (= |#NULL.offset| 0) (= ~__ste_Client_AddressBook2_Alias2~0 0) (<= 0 ~__ste_email_isSigned0~0) (<= 0 ~__ste_client_autoResponse2~0) (= ~__ste_email_subject1~0.offset 0) (= ~__ste_Client_AddressBook0_Alias2~0 0) (= ~__ste_ClientKeyring_size0~0 0) (= ~__ste_Client_AddressBook1_Address1~0 0) (= 0 ~__ste_Client_AddressBook0_Address0~0) (= ~__ste_client_outbuffer1~0 0) (= ~__ste_Client_AddressBook0_Alias1~0 0) (<= ~__ste_email_isEncrypted1~0 0) (= ~__GUIDSL_ROOT_PRODUCTION~0 0) (= ~__ste_client_name0~0.base 0) (= ~__ste_email_id1~0 0) (= ~__ste_client_outbuffer2~0 0) (<= 0 (+ ~__ste_client_idCounter0~0 2147483648)) (<= 2 ~__ste_email_to0~0) (<= 0 |#StackHeapBarrier|) (<= ~__ste_email_to0~0 2) (= ~__ste_ClientAddressBook_size2~0 0) (= ~__SELECTED_FEATURE_AutoResponder~0 0) (<= ~__ste_client_autoResponse2~0 0) (= ~__ste_email_body1~0.base 0) (= ~__ste_ClientKeyring_size2~0 0) (<= 0 ~__ste_email_encryptionKey0~0) (= |#NULL.base| 0) (<= ~queued_client~0 0))' at error location [2021-11-23 03:58:49,709 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:58:49,709 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:58:49,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-23 03:58:49,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139377198] [2021-11-23 03:58:49,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:58:49,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 03:58:49,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:58:49,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 03:58:49,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=4740, Unknown=0, NotChecked=0, Total=4970 [2021-11-23 03:58:49,714 INFO L87 Difference]: Start difference. First operand 240 states and 337 transitions. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-23 03:58:50,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:58:50,039 INFO L93 Difference]: Finished difference Result 602 states and 902 transitions. [2021-11-23 03:58:50,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:58:50,040 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 90 [2021-11-23 03:58:50,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:58:50,044 INFO L225 Difference]: With dead ends: 602 [2021-11-23 03:58:50,044 INFO L226 Difference]: Without dead ends: 490 [2021-11-23 03:58:50,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 199 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1230 ImplicationChecksByTransitivity, 261.8s TimeCoverageRelationStatistics Valid=230, Invalid=4740, Unknown=0, NotChecked=0, Total=4970 [2021-11-23 03:58:50,049 INFO L933 BasicCegarLoop]: 288 mSDtfsCounter, 214 mSDsluCounter, 726 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 931 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:58:50,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 931 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 03:58:50,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-11-23 03:58:50,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 475. [2021-11-23 03:58:50,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 318 states have (on average 1.5031446540880504) internal successors, (478), 322 states have internal predecessors, (478), 133 states have call successors, (133), 24 states have call predecessors, (133), 23 states have return successors, (130), 130 states have call predecessors, (130), 130 states have call successors, (130) [2021-11-23 03:58:50,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 741 transitions. [2021-11-23 03:58:50,082 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 741 transitions. Word has length 90 [2021-11-23 03:58:50,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:58:50,082 INFO L470 AbstractCegarLoop]: Abstraction has 475 states and 741 transitions. [2021-11-23 03:58:50,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-23 03:58:50,083 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 741 transitions. [2021-11-23 03:58:50,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-23 03:58:50,086 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:58:50,087 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:58:50,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a520053-873f-408d-9b07-8c76060fb0d6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 03:58:50,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a520053-873f-408d-9b07-8c76060fb0d6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:58:50,306 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:58:50,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:58:50,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1202593078, now seen corresponding path program 1 times [2021-11-23 03:58:50,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:58:50,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258437426] [2021-11-23 03:58:50,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:58:50,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:58:50,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:58:50,376 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-23 03:58:50,377 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:58:50,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258437426] [2021-11-23 03:58:50,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258437426] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:58:50,377 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:58:50,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:58:50,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951299153] [2021-11-23 03:58:50,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:58:50,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:58:50,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:58:50,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:58:50,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:58:50,380 INFO L87 Difference]: Start difference. First operand 475 states and 741 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-23 03:58:50,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:58:50,491 INFO L93 Difference]: Finished difference Result 1155 states and 1840 transitions. [2021-11-23 03:58:50,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:58:50,491 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 96 [2021-11-23 03:58:50,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:58:50,498 INFO L225 Difference]: With dead ends: 1155 [2021-11-23 03:58:50,498 INFO L226 Difference]: Without dead ends: 712 [2021-11-23 03:58:50,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:58:50,501 INFO L933 BasicCegarLoop]: 246 mSDtfsCounter, 55 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:58:50,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 471 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:58:50,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2021-11-23 03:58:50,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 707. [2021-11-23 03:58:50,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 486 states have (on average 1.5246913580246915) internal successors, (741), 490 states have internal predecessors, (741), 197 states have call successors, (197), 24 states have call predecessors, (197), 23 states have return successors, (194), 194 states have call predecessors, (194), 194 states have call successors, (194) [2021-11-23 03:58:50,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 1132 transitions. [2021-11-23 03:58:50,544 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 1132 transitions. Word has length 96 [2021-11-23 03:58:50,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:58:50,544 INFO L470 AbstractCegarLoop]: Abstraction has 707 states and 1132 transitions. [2021-11-23 03:58:50,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-23 03:58:50,545 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 1132 transitions. [2021-11-23 03:58:50,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-23 03:58:50,549 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:58:50,550 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:58:50,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 03:58:50,550 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:58:50,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:58:50,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1131510684, now seen corresponding path program 1 times [2021-11-23 03:58:50,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:58:50,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585671061] [2021-11-23 03:58:50,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:58:50,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:58:50,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:58:50,613 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-23 03:58:50,613 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:58:50,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585671061] [2021-11-23 03:58:50,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585671061] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:58:50,614 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:58:50,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:58:50,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105403342] [2021-11-23 03:58:50,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:58:50,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:58:50,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:58:50,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:58:50,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:58:50,616 INFO L87 Difference]: Start difference. First operand 707 states and 1132 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-23 03:58:50,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:58:50,753 INFO L93 Difference]: Finished difference Result 1712 states and 2783 transitions. [2021-11-23 03:58:50,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:58:50,754 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 97 [2021-11-23 03:58:50,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:58:50,764 INFO L225 Difference]: With dead ends: 1712 [2021-11-23 03:58:50,764 INFO L226 Difference]: Without dead ends: 1067 [2021-11-23 03:58:50,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:58:50,769 INFO L933 BasicCegarLoop]: 241 mSDtfsCounter, 53 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:58:50,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 462 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:58:50,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2021-11-23 03:58:50,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 1062. [2021-11-23 03:58:50,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1062 states, 746 states have (on average 1.53485254691689) internal successors, (1145), 750 states have internal predecessors, (1145), 292 states have call successors, (292), 24 states have call predecessors, (292), 23 states have return successors, (289), 289 states have call predecessors, (289), 289 states have call successors, (289) [2021-11-23 03:58:50,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1062 states to 1062 states and 1726 transitions. [2021-11-23 03:58:50,837 INFO L78 Accepts]: Start accepts. Automaton has 1062 states and 1726 transitions. Word has length 97 [2021-11-23 03:58:50,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:58:50,839 INFO L470 AbstractCegarLoop]: Abstraction has 1062 states and 1726 transitions. [2021-11-23 03:58:50,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-23 03:58:50,839 INFO L276 IsEmpty]: Start isEmpty. Operand 1062 states and 1726 transitions. [2021-11-23 03:58:50,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-23 03:58:50,847 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:58:50,847 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:58:50,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 03:58:50,847 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:58:50,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:58:50,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1193144316, now seen corresponding path program 1 times [2021-11-23 03:58:50,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:58:50,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679325432] [2021-11-23 03:58:50,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:58:50,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:58:50,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:58:50,936 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-23 03:58:50,936 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:58:50,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679325432] [2021-11-23 03:58:50,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679325432] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:58:50,937 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:58:50,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:58:50,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47748881] [2021-11-23 03:58:50,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:58:50,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:58:50,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:58:50,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:58:50,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:58:50,939 INFO L87 Difference]: Start difference. First operand 1062 states and 1726 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-23 03:58:51,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:58:51,090 INFO L93 Difference]: Finished difference Result 2510 states and 4127 transitions. [2021-11-23 03:58:51,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:58:51,091 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 98 [2021-11-23 03:58:51,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:58:51,103 INFO L225 Difference]: With dead ends: 2510 [2021-11-23 03:58:51,104 INFO L226 Difference]: Without dead ends: 1590 [2021-11-23 03:58:51,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:58:51,108 INFO L933 BasicCegarLoop]: 237 mSDtfsCounter, 51 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:58:51,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 454 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:58:51,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1590 states. [2021-11-23 03:58:51,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1590 to 1585. [2021-11-23 03:58:51,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1585 states, 1146 states have (on average 1.5418848167539267) internal successors, (1767), 1150 states have internal predecessors, (1767), 415 states have call successors, (415), 24 states have call predecessors, (415), 23 states have return successors, (412), 412 states have call predecessors, (412), 412 states have call successors, (412) [2021-11-23 03:58:51,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1585 states to 1585 states and 2594 transitions. [2021-11-23 03:58:51,203 INFO L78 Accepts]: Start accepts. Automaton has 1585 states and 2594 transitions. Word has length 98 [2021-11-23 03:58:51,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:58:51,203 INFO L470 AbstractCegarLoop]: Abstraction has 1585 states and 2594 transitions. [2021-11-23 03:58:51,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-23 03:58:51,204 INFO L276 IsEmpty]: Start isEmpty. Operand 1585 states and 2594 transitions. [2021-11-23 03:58:51,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-23 03:58:51,215 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:58:51,215 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:58:51,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 03:58:51,215 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:58:51,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:58:51,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1134562595, now seen corresponding path program 1 times [2021-11-23 03:58:51,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:58:51,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803334544] [2021-11-23 03:58:51,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:58:51,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:58:51,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:58:51,286 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-23 03:58:51,287 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:58:51,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803334544] [2021-11-23 03:58:51,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803334544] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:58:51,287 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:58:51,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:58:51,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185637668] [2021-11-23 03:58:51,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:58:51,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:58:51,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:58:51,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:58:51,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:58:51,290 INFO L87 Difference]: Start difference. First operand 1585 states and 2594 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-23 03:58:51,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:58:51,485 INFO L93 Difference]: Finished difference Result 3720 states and 6155 transitions. [2021-11-23 03:58:51,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:58:51,486 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 99 [2021-11-23 03:58:51,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:58:51,504 INFO L225 Difference]: With dead ends: 3720 [2021-11-23 03:58:51,504 INFO L226 Difference]: Without dead ends: 2414 [2021-11-23 03:58:51,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:58:51,510 INFO L933 BasicCegarLoop]: 237 mSDtfsCounter, 49 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:58:51,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 454 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:58:51,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2414 states. [2021-11-23 03:58:51,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2414 to 2409. [2021-11-23 03:58:51,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2409 states, 1791 states have (on average 1.5460636515912898) internal successors, (2769), 1795 states have internal predecessors, (2769), 594 states have call successors, (594), 24 states have call predecessors, (594), 23 states have return successors, (591), 591 states have call predecessors, (591), 591 states have call successors, (591) [2021-11-23 03:58:51,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2409 states to 2409 states and 3954 transitions. [2021-11-23 03:58:51,665 INFO L78 Accepts]: Start accepts. Automaton has 2409 states and 3954 transitions. Word has length 99 [2021-11-23 03:58:51,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:58:51,665 INFO L470 AbstractCegarLoop]: Abstraction has 2409 states and 3954 transitions. [2021-11-23 03:58:51,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-23 03:58:51,666 INFO L276 IsEmpty]: Start isEmpty. Operand 2409 states and 3954 transitions. [2021-11-23 03:58:51,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-23 03:58:51,679 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:58:51,679 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:58:51,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 03:58:51,680 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:58:51,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:58:51,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1311591616, now seen corresponding path program 1 times [2021-11-23 03:58:51,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:58:51,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788212967] [2021-11-23 03:58:51,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:58:51,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:58:51,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:58:51,736 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-23 03:58:51,736 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:58:51,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788212967] [2021-11-23 03:58:51,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788212967] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:58:51,736 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:58:51,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:58:51,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587069676] [2021-11-23 03:58:51,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:58:51,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:58:51,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:58:51,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:58:51,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:58:51,739 INFO L87 Difference]: Start difference. First operand 2409 states and 3954 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-23 03:58:51,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:58:51,982 INFO L93 Difference]: Finished difference Result 5931 states and 9827 transitions. [2021-11-23 03:58:51,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:58:51,983 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 100 [2021-11-23 03:58:51,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:58:52,014 INFO L225 Difference]: With dead ends: 5931 [2021-11-23 03:58:52,015 INFO L226 Difference]: Without dead ends: 3944 [2021-11-23 03:58:52,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:58:52,024 INFO L933 BasicCegarLoop]: 251 mSDtfsCounter, 47 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:58:52,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 476 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:58:52,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3944 states. [2021-11-23 03:58:52,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3944 to 3939. [2021-11-23 03:58:52,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3939 states, 2945 states have (on average 1.53616298811545) internal successors, (4524), 2949 states have internal predecessors, (4524), 970 states have call successors, (970), 24 states have call predecessors, (970), 23 states have return successors, (967), 967 states have call predecessors, (967), 967 states have call successors, (967) [2021-11-23 03:58:52,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3939 states to 3939 states and 6461 transitions. [2021-11-23 03:58:52,306 INFO L78 Accepts]: Start accepts. Automaton has 3939 states and 6461 transitions. Word has length 100 [2021-11-23 03:58:52,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:58:52,307 INFO L470 AbstractCegarLoop]: Abstraction has 3939 states and 6461 transitions. [2021-11-23 03:58:52,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-23 03:58:52,307 INFO L276 IsEmpty]: Start isEmpty. Operand 3939 states and 6461 transitions. [2021-11-23 03:58:52,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-23 03:58:52,327 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:58:52,327 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:58:52,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 03:58:52,328 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:58:52,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:58:52,328 INFO L85 PathProgramCache]: Analyzing trace with hash -546023969, now seen corresponding path program 1 times [2021-11-23 03:58:52,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:58:52,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280990585] [2021-11-23 03:58:52,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:58:52,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:58:52,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:58:52,385 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-23 03:58:52,386 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:58:52,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280990585] [2021-11-23 03:58:52,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280990585] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:58:52,386 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:58:52,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:58:52,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091393696] [2021-11-23 03:58:52,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:58:52,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:58:52,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:58:52,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:58:52,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:58:52,388 INFO L87 Difference]: Start difference. First operand 3939 states and 6461 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-23 03:58:52,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:58:52,743 INFO L93 Difference]: Finished difference Result 9792 states and 16224 transitions. [2021-11-23 03:58:52,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:58:52,744 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 101 [2021-11-23 03:58:52,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:58:52,795 INFO L225 Difference]: With dead ends: 9792 [2021-11-23 03:58:52,795 INFO L226 Difference]: Without dead ends: 6541 [2021-11-23 03:58:52,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:58:52,809 INFO L933 BasicCegarLoop]: 242 mSDtfsCounter, 45 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:58:52,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 463 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:58:52,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6541 states. [2021-11-23 03:58:53,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6541 to 6536. [2021-11-23 03:58:53,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6536 states, 4936 states have (on average 1.532617504051864) internal successors, (7565), 4940 states have internal predecessors, (7565), 1576 states have call successors, (1576), 24 states have call predecessors, (1576), 23 states have return successors, (1573), 1573 states have call predecessors, (1573), 1573 states have call successors, (1573) [2021-11-23 03:58:53,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6536 states to 6536 states and 10714 transitions. [2021-11-23 03:58:53,241 INFO L78 Accepts]: Start accepts. Automaton has 6536 states and 10714 transitions. Word has length 101 [2021-11-23 03:58:53,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:58:53,242 INFO L470 AbstractCegarLoop]: Abstraction has 6536 states and 10714 transitions. [2021-11-23 03:58:53,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-23 03:58:53,243 INFO L276 IsEmpty]: Start isEmpty. Operand 6536 states and 10714 transitions. [2021-11-23 03:58:53,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-23 03:58:53,309 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:58:53,309 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:58:53,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 03:58:53,309 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:58:53,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:58:53,310 INFO L85 PathProgramCache]: Analyzing trace with hash -522758914, now seen corresponding path program 1 times [2021-11-23 03:58:53,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:58:53,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171316909] [2021-11-23 03:58:53,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:58:53,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:58:53,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:58:53,378 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-23 03:58:53,378 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:58:53,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171316909] [2021-11-23 03:58:53,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171316909] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:58:53,379 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:58:53,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:58:53,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111421429] [2021-11-23 03:58:53,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:58:53,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:58:53,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:58:53,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:58:53,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:58:53,382 INFO L87 Difference]: Start difference. First operand 6536 states and 10714 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-23 03:58:53,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:58:53,884 INFO L93 Difference]: Finished difference Result 17044 states and 28142 transitions. [2021-11-23 03:58:53,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:58:53,885 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 102 [2021-11-23 03:58:53,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:58:53,969 INFO L225 Difference]: With dead ends: 17044 [2021-11-23 03:58:53,970 INFO L226 Difference]: Without dead ends: 11485 [2021-11-23 03:58:53,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:58:53,993 INFO L933 BasicCegarLoop]: 250 mSDtfsCounter, 43 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:58:53,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 475 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:58:54,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11485 states. [2021-11-23 03:58:54,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11485 to 11480. [2021-11-23 03:58:54,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11480 states, 8677 states have (on average 1.519649648496024) internal successors, (13186), 8681 states have internal predecessors, (13186), 2779 states have call successors, (2779), 24 states have call predecessors, (2779), 23 states have return successors, (2776), 2776 states have call predecessors, (2776), 2776 states have call successors, (2776) [2021-11-23 03:58:54,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11480 states to 11480 states and 18741 transitions. [2021-11-23 03:58:54,804 INFO L78 Accepts]: Start accepts. Automaton has 11480 states and 18741 transitions. Word has length 102 [2021-11-23 03:58:54,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:58:54,805 INFO L470 AbstractCegarLoop]: Abstraction has 11480 states and 18741 transitions. [2021-11-23 03:58:54,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-23 03:58:54,805 INFO L276 IsEmpty]: Start isEmpty. Operand 11480 states and 18741 transitions. [2021-11-23 03:58:54,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-23 03:58:54,844 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:58:54,845 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:58:54,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 03:58:54,845 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:58:54,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:58:54,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1907295998, now seen corresponding path program 1 times [2021-11-23 03:58:54,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:58:54,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387682658] [2021-11-23 03:58:54,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:58:54,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:58:54,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:58:54,986 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-23 03:58:54,986 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:58:54,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387682658] [2021-11-23 03:58:54,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387682658] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:58:54,987 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:58:54,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:58:54,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897435619] [2021-11-23 03:58:54,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:58:54,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:58:54,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:58:54,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:58:54,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:58:54,989 INFO L87 Difference]: Start difference. First operand 11480 states and 18741 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-23 03:58:56,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:58:56,002 INFO L93 Difference]: Finished difference Result 30363 states and 49908 transitions. [2021-11-23 03:58:56,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:58:56,003 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 103 [2021-11-23 03:58:56,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:58:56,097 INFO L225 Difference]: With dead ends: 30363 [2021-11-23 03:58:56,097 INFO L226 Difference]: Without dead ends: 20312 [2021-11-23 03:58:56,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:58:56,136 INFO L933 BasicCegarLoop]: 239 mSDtfsCounter, 41 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:58:56,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 459 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:58:56,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20312 states. [2021-11-23 03:58:57,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20312 to 20307. [2021-11-23 03:58:57,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20307 states, 15465 states have (on average 1.5121241513094084) internal successors, (23385), 15469 states have internal predecessors, (23385), 4818 states have call successors, (4818), 24 states have call predecessors, (4818), 23 states have return successors, (4815), 4815 states have call predecessors, (4815), 4815 states have call successors, (4815) [2021-11-23 03:58:57,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20307 states to 20307 states and 33018 transitions. [2021-11-23 03:58:57,776 INFO L78 Accepts]: Start accepts. Automaton has 20307 states and 33018 transitions. Word has length 103 [2021-11-23 03:58:57,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:58:57,778 INFO L470 AbstractCegarLoop]: Abstraction has 20307 states and 33018 transitions. [2021-11-23 03:58:57,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-23 03:58:57,778 INFO L276 IsEmpty]: Start isEmpty. Operand 20307 states and 33018 transitions. [2021-11-23 03:58:57,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-23 03:58:57,825 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:58:57,825 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:58:57,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 03:58:57,826 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:58:57,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:58:57,826 INFO L85 PathProgramCache]: Analyzing trace with hash -948714916, now seen corresponding path program 1 times [2021-11-23 03:58:57,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:58:57,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500634630] [2021-11-23 03:58:57,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:58:57,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:58:57,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:58:57,968 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-23 03:58:57,969 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:58:57,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500634630] [2021-11-23 03:58:57,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500634630] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:58:57,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:58:57,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:58:57,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568191828] [2021-11-23 03:58:57,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:58:57,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:58:57,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:58:57,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:58:57,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:58:57,972 INFO L87 Difference]: Start difference. First operand 20307 states and 33018 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-23 03:58:59,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:58:59,898 INFO L93 Difference]: Finished difference Result 55075 states and 90000 transitions. [2021-11-23 03:58:59,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:58:59,899 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 104 [2021-11-23 03:58:59,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:59:00,093 INFO L225 Difference]: With dead ends: 55075 [2021-11-23 03:59:00,093 INFO L226 Difference]: Without dead ends: 36752 [2021-11-23 03:59:00,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:59:00,154 INFO L933 BasicCegarLoop]: 239 mSDtfsCounter, 39 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:59:00,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 459 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:59:00,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36752 states. [2021-11-23 03:59:02,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36752 to 36747. [2021-11-23 03:59:02,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36747 states, 28190 states have (on average 1.5015608371763036) internal successors, (42329), 28194 states have internal predecessors, (42329), 8533 states have call successors, (8533), 24 states have call predecessors, (8533), 23 states have return successors, (8530), 8530 states have call predecessors, (8530), 8530 states have call successors, (8530) [2021-11-23 03:59:02,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36747 states to 36747 states and 59392 transitions. [2021-11-23 03:59:02,872 INFO L78 Accepts]: Start accepts. Automaton has 36747 states and 59392 transitions. Word has length 104 [2021-11-23 03:59:02,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:59:02,873 INFO L470 AbstractCegarLoop]: Abstraction has 36747 states and 59392 transitions. [2021-11-23 03:59:02,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-23 03:59:02,874 INFO L276 IsEmpty]: Start isEmpty. Operand 36747 states and 59392 transitions. [2021-11-23 03:59:02,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-23 03:59:02,937 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:59:02,938 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:59:02,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 03:59:02,939 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:59:02,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:59:02,939 INFO L85 PathProgramCache]: Analyzing trace with hash 882751582, now seen corresponding path program 1 times [2021-11-23 03:59:02,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:59:02,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468191945] [2021-11-23 03:59:02,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:59:02,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:59:02,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:59:03,015 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-23 03:59:03,016 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:59:03,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468191945] [2021-11-23 03:59:03,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468191945] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:59:03,017 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:59:03,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:59:03,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314630033] [2021-11-23 03:59:03,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:59:03,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:59:03,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:59:03,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:59:03,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:59:03,019 INFO L87 Difference]: Start difference. First operand 36747 states and 59392 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-23 03:59:05,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:59:05,567 INFO L93 Difference]: Finished difference Result 67692 states and 109581 transitions. [2021-11-23 03:59:05,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:59:05,568 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 105 [2021-11-23 03:59:05,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:59:06,013 INFO L225 Difference]: With dead ends: 67692 [2021-11-23 03:59:06,013 INFO L226 Difference]: Without dead ends: 67580 [2021-11-23 03:59:06,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:59:06,035 INFO L933 BasicCegarLoop]: 239 mSDtfsCounter, 37 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:59:06,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 459 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:59:06,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67580 states. [2021-11-23 03:59:09,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67580 to 67575. [2021-11-23 03:59:09,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67575 states, 52219 states have (on average 1.4876768992129301) internal successors, (77685), 52223 states have internal predecessors, (77685), 15332 states have call successors, (15332), 24 states have call predecessors, (15332), 23 states have return successors, (15329), 15329 states have call predecessors, (15329), 15329 states have call successors, (15329) [2021-11-23 03:59:09,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67575 states to 67575 states and 108346 transitions. [2021-11-23 03:59:09,625 INFO L78 Accepts]: Start accepts. Automaton has 67575 states and 108346 transitions. Word has length 105 [2021-11-23 03:59:09,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:59:09,626 INFO L470 AbstractCegarLoop]: Abstraction has 67575 states and 108346 transitions. [2021-11-23 03:59:09,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-23 03:59:09,626 INFO L276 IsEmpty]: Start isEmpty. Operand 67575 states and 108346 transitions. [2021-11-23 03:59:09,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-23 03:59:09,678 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:59:09,678 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:59:09,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-23 03:59:09,679 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:59:09,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:59:09,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1908288067, now seen corresponding path program 1 times [2021-11-23 03:59:09,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:59:09,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321620333] [2021-11-23 03:59:09,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:59:09,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:59:09,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:59:10,291 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-23 03:59:10,292 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:59:10,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321620333] [2021-11-23 03:59:10,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321620333] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:59:10,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878789594] [2021-11-23 03:59:10,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:59:10,293 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:59:10,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a520053-873f-408d-9b07-8c76060fb0d6/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:59:10,294 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a520053-873f-408d-9b07-8c76060fb0d6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:59:10,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a520053-873f-408d-9b07-8c76060fb0d6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 03:59:10,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:59:10,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 100 conjunts are in the unsatisfiable core [2021-11-23 03:59:10,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:59:12,173 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 16 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:59:12,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:59:17,941 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-23 03:59:17,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878789594] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:59:17,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [885301610] [2021-11-23 03:59:17,946 INFO L159 IcfgInterpreter]: Started Sifa with 91 locations of interest [2021-11-23 03:59:17,946 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:59:17,947 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:59:17,947 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:59:17,948 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:59:42,233 INFO L197 IcfgInterpreter]: Interpreting procedure setClientId with input of size 443 for LOIs [2021-11-23 03:59:42,493 INFO L197 IcfgInterpreter]: Interpreting procedure sendEmail with input of size 483 for LOIs [2021-11-23 03:59:44,454 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailTo with input of size 235 for LOIs [2021-11-23 03:59:44,497 INFO L197 IcfgInterpreter]: Interpreting procedure setClientPrivateKey with input of size 445 for LOIs [2021-11-23 03:59:44,762 INFO L197 IcfgInterpreter]: Interpreting procedure outgoing with input of size 269 for LOIs