./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec27_product18.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_540a0718-bdd0-4204-8ebf-39b2eb3033b6/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540a0718-bdd0-4204-8ebf-39b2eb3033b6/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_540a0718-bdd0-4204-8ebf-39b2eb3033b6/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540a0718-bdd0-4204-8ebf-39b2eb3033b6/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec27_product18.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540a0718-bdd0-4204-8ebf-39b2eb3033b6/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_540a0718-bdd0-4204-8ebf-39b2eb3033b6/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 e1a1a15d818854b6fd39e860ed8f86805463715275e4ae9feedab248e5877daf --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:45:30,153 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:45:30,155 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:45:30,217 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:45:30,218 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:45:30,220 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:45:30,222 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:45:30,225 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:45:30,232 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:45:30,240 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:45:30,241 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:45:30,245 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:45:30,245 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:45:30,248 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:45:30,252 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:45:30,255 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:45:30,257 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:45:30,258 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:45:30,262 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:45:30,270 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:45:30,272 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:45:30,274 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:45:30,277 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:45:30,278 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:45:30,285 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:45:30,285 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:45:30,286 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:45:30,288 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:45:30,289 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:45:30,290 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:45:30,291 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:45:30,292 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:45:30,294 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:45:30,295 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:45:30,297 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:45:30,297 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:45:30,298 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:45:30,298 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:45:30,299 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:45:30,300 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:45:30,301 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:45:30,302 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540a0718-bdd0-4204-8ebf-39b2eb3033b6/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 02:45:30,347 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:45:30,347 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:45:30,348 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:45:30,348 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:45:30,349 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:45:30,349 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:45:30,349 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:45:30,349 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:45:30,350 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:45:30,350 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:45:30,351 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:45:30,351 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:45:30,351 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:45:30,352 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:45:30,352 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:45:30,352 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:45:30,352 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:45:30,352 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:45:30,353 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:45:30,353 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:45:30,354 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:45:30,354 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:45:30,354 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:45:30,354 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:45:30,354 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:45:30,355 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:45:30,355 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:45:30,355 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:45:30,355 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:45:30,355 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:45:30,356 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:45:30,356 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:45:30,356 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:45:30,357 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:45:30,357 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:45:30,357 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:45:30,357 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:45:30,357 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:45:30,358 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:45:30,358 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:45:30,358 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:45:30,358 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_540a0718-bdd0-4204-8ebf-39b2eb3033b6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540a0718-bdd0-4204-8ebf-39b2eb3033b6/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e1a1a15d818854b6fd39e860ed8f86805463715275e4ae9feedab248e5877daf [2021-11-23 02:45:30,616 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:45:30,636 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:45:30,639 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:45:30,640 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:45:30,641 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:45:30,643 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540a0718-bdd0-4204-8ebf-39b2eb3033b6/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/product-lines/email_spec27_product18.cil.c [2021-11-23 02:45:30,710 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540a0718-bdd0-4204-8ebf-39b2eb3033b6/bin/utaipan-EQgc7hIp5V/data/01a79271b/e27eb891e3694dc6b01c3a8a4bbe1867/FLAG502b2c9bc [2021-11-23 02:45:31,401 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:45:31,402 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540a0718-bdd0-4204-8ebf-39b2eb3033b6/sv-benchmarks/c/product-lines/email_spec27_product18.cil.c [2021-11-23 02:45:31,433 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540a0718-bdd0-4204-8ebf-39b2eb3033b6/bin/utaipan-EQgc7hIp5V/data/01a79271b/e27eb891e3694dc6b01c3a8a4bbe1867/FLAG502b2c9bc [2021-11-23 02:45:31,580 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540a0718-bdd0-4204-8ebf-39b2eb3033b6/bin/utaipan-EQgc7hIp5V/data/01a79271b/e27eb891e3694dc6b01c3a8a4bbe1867 [2021-11-23 02:45:31,587 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:45:31,589 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:45:31,591 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:45:31,591 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:45:31,597 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:45:31,598 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:45:31" (1/1) ... [2021-11-23 02:45:31,602 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@123446d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:31, skipping insertion in model container [2021-11-23 02:45:31,602 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:45:31" (1/1) ... [2021-11-23 02:45:31,611 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:45:31,685 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:45:32,406 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_540a0718-bdd0-4204-8ebf-39b2eb3033b6/sv-benchmarks/c/product-lines/email_spec27_product18.cil.c[62382,62395] [2021-11-23 02:45:32,409 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:45:32,419 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:45:32,545 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_540a0718-bdd0-4204-8ebf-39b2eb3033b6/sv-benchmarks/c/product-lines/email_spec27_product18.cil.c[62382,62395] [2021-11-23 02:45:32,545 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:45:32,576 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:45:32,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:32 WrapperNode [2021-11-23 02:45:32,577 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:45:32,578 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:45:32,578 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:45:32,578 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:45:32,584 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:32" (1/1) ... [2021-11-23 02:45:32,613 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:32" (1/1) ... [2021-11-23 02:45:32,683 INFO L137 Inliner]: procedures = 127, calls = 200, calls flagged for inlining = 57, calls inlined = 49, statements flattened = 874 [2021-11-23 02:45:32,684 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:45:32,685 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:45:32,685 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:45:32,685 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:45:32,699 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:32" (1/1) ... [2021-11-23 02:45:32,699 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:32" (1/1) ... [2021-11-23 02:45:32,708 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:32" (1/1) ... [2021-11-23 02:45:32,708 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:32" (1/1) ... [2021-11-23 02:45:32,742 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:32" (1/1) ... [2021-11-23 02:45:32,769 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:32" (1/1) ... [2021-11-23 02:45:32,782 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:32" (1/1) ... [2021-11-23 02:45:32,795 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:45:32,798 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:45:32,798 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:45:32,799 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:45:32,800 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:32" (1/1) ... [2021-11-23 02:45:32,811 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:45:32,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540a0718-bdd0-4204-8ebf-39b2eb3033b6/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:45:32,836 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540a0718-bdd0-4204-8ebf-39b2eb3033b6/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:45:32,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540a0718-bdd0-4204-8ebf-39b2eb3033b6/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:45:32,894 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailTo [2021-11-23 02:45:32,895 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailTo [2021-11-23 02:45:32,895 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailFrom [2021-11-23 02:45:32,895 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailFrom [2021-11-23 02:45:32,895 INFO L130 BoogieDeclarations]: Found specification of procedure isReadable [2021-11-23 02:45:32,895 INFO L138 BoogieDeclarations]: Found implementation of procedure isReadable [2021-11-23 02:45:32,895 INFO L130 BoogieDeclarations]: Found specification of procedure createClientKeyringEntry [2021-11-23 02:45:32,896 INFO L138 BoogieDeclarations]: Found implementation of procedure createClientKeyringEntry [2021-11-23 02:45:32,896 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailSignKey [2021-11-23 02:45:32,896 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailSignKey [2021-11-23 02:45:32,896 INFO L130 BoogieDeclarations]: Found specification of procedure chuckKeyAdd [2021-11-23 02:45:32,896 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckKeyAdd [2021-11-23 02:45:32,896 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-23 02:45:32,896 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailFrom [2021-11-23 02:45:32,897 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailFrom [2021-11-23 02:45:32,897 INFO L130 BoogieDeclarations]: Found specification of procedure setClientId [2021-11-23 02:45:32,897 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientId [2021-11-23 02:45:32,897 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:45:32,897 INFO L130 BoogieDeclarations]: Found specification of procedure isSigned [2021-11-23 02:45:32,897 INFO L138 BoogieDeclarations]: Found implementation of procedure isSigned [2021-11-23 02:45:32,897 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringUser [2021-11-23 02:45:32,898 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringUser [2021-11-23 02:45:32,898 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringPublicKey [2021-11-23 02:45:32,898 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringPublicKey [2021-11-23 02:45:32,898 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing [2021-11-23 02:45:32,898 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing [2021-11-23 02:45:32,898 INFO L130 BoogieDeclarations]: Found specification of procedure isVerified [2021-11-23 02:45:32,898 INFO L138 BoogieDeclarations]: Found implementation of procedure isVerified [2021-11-23 02:45:32,899 INFO L130 BoogieDeclarations]: Found specification of procedure findPublicKey [2021-11-23 02:45:32,899 INFO L138 BoogieDeclarations]: Found implementation of procedure findPublicKey [2021-11-23 02:45:32,899 INFO L130 BoogieDeclarations]: Found specification of procedure sendEmail [2021-11-23 02:45:32,899 INFO L138 BoogieDeclarations]: Found implementation of procedure sendEmail [2021-11-23 02:45:32,899 INFO L130 BoogieDeclarations]: Found specification of procedure setClientPrivateKey [2021-11-23 02:45:32,899 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientPrivateKey [2021-11-23 02:45:32,899 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailTo [2021-11-23 02:45:32,900 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailTo [2021-11-23 02:45:32,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:45:32,900 INFO L130 BoogieDeclarations]: Found specification of procedure generateKeyPair [2021-11-23 02:45:32,900 INFO L138 BoogieDeclarations]: Found implementation of procedure generateKeyPair [2021-11-23 02:45:32,900 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:45:32,900 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:45:33,150 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:45:33,153 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:45:33,937 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:45:34,407 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:45:34,407 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 02:45:34,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:45:34 BoogieIcfgContainer [2021-11-23 02:45:34,411 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:45:34,413 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:45:34,413 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:45:34,416 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:45:34,416 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:45:31" (1/3) ... [2021-11-23 02:45:34,417 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c3030c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:45:34, skipping insertion in model container [2021-11-23 02:45:34,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:32" (2/3) ... [2021-11-23 02:45:34,418 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c3030c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:45:34, skipping insertion in model container [2021-11-23 02:45:34,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:45:34" (3/3) ... [2021-11-23 02:45:34,421 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec27_product18.cil.c [2021-11-23 02:45:34,430 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:45:34,431 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:45:34,494 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:45:34,502 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 02:45:34,503 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:45:34,541 INFO L276 IsEmpty]: Start isEmpty. Operand has 153 states, 92 states have (on average 1.358695652173913) internal successors, (125), 94 states have internal predecessors, (125), 41 states have call successors, (41), 18 states have call predecessors, (41), 18 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2021-11-23 02:45:34,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-23 02:45:34,560 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:45:34,561 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:45:34,562 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:45:34,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:45:34,568 INFO L85 PathProgramCache]: Analyzing trace with hash 228193760, now seen corresponding path program 1 times [2021-11-23 02:45:34,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:45:34,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026348007] [2021-11-23 02:45:34,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:45:34,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:45:34,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:45:34,962 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-23 02:45:34,962 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:45:34,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026348007] [2021-11-23 02:45:34,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026348007] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:45:34,964 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:45:34,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:45:34,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926157082] [2021-11-23 02:45:34,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:45:34,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 02:45:34,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:45:35,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 02:45:35,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 02:45:35,013 INFO L87 Difference]: Start difference. First operand has 153 states, 92 states have (on average 1.358695652173913) internal successors, (125), 94 states have internal predecessors, (125), 41 states have call successors, (41), 18 states have call predecessors, (41), 18 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) Second operand has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-23 02:45:35,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:45:35,151 INFO L93 Difference]: Finished difference Result 223 states and 292 transitions. [2021-11-23 02:45:35,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 02:45:35,155 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 68 [2021-11-23 02:45:35,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:45:35,172 INFO L225 Difference]: With dead ends: 223 [2021-11-23 02:45:35,172 INFO L226 Difference]: Without dead ends: 150 [2021-11-23 02:45:35,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 02:45:35,183 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:45:35,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 176 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:45:35,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-11-23 02:45:35,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2021-11-23 02:45:35,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 90 states have (on average 1.3222222222222222) internal successors, (119), 91 states have internal predecessors, (119), 41 states have call successors, (41), 18 states have call predecessors, (41), 18 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2021-11-23 02:45:35,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 200 transitions. [2021-11-23 02:45:35,273 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 200 transitions. Word has length 68 [2021-11-23 02:45:35,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:45:35,275 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 200 transitions. [2021-11-23 02:45:35,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-23 02:45:35,276 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 200 transitions. [2021-11-23 02:45:35,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-23 02:45:35,292 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:45:35,292 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:45:35,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:45:35,293 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:45:35,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:45:35,294 INFO L85 PathProgramCache]: Analyzing trace with hash 250701991, now seen corresponding path program 1 times [2021-11-23 02:45:35,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:45:35,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277500284] [2021-11-23 02:45:35,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:45:35,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:45:35,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:45:35,509 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-23 02:45:35,510 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:45:35,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277500284] [2021-11-23 02:45:35,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277500284] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:45:35,511 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:45:35,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:45:35,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489054521] [2021-11-23 02:45:35,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:45:35,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:45:35,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:45:35,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:45:35,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:45:35,515 INFO L87 Difference]: Start difference. First operand 150 states and 200 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-23 02:45:35,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:45:35,677 INFO L93 Difference]: Finished difference Result 219 states and 280 transitions. [2021-11-23 02:45:35,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:45:35,681 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 69 [2021-11-23 02:45:35,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:45:35,684 INFO L225 Difference]: With dead ends: 219 [2021-11-23 02:45:35,684 INFO L226 Difference]: Without dead ends: 152 [2021-11-23 02:45:35,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:45:35,688 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 0 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:45:35,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 345 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:45:35,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-11-23 02:45:35,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2021-11-23 02:45:35,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 92 states have (on average 1.315217391304348) internal successors, (121), 93 states have internal predecessors, (121), 41 states have call successors, (41), 18 states have call predecessors, (41), 18 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2021-11-23 02:45:35,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 202 transitions. [2021-11-23 02:45:35,724 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 202 transitions. Word has length 69 [2021-11-23 02:45:35,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:45:35,726 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 202 transitions. [2021-11-23 02:45:35,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-23 02:45:35,727 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 202 transitions. [2021-11-23 02:45:35,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-23 02:45:35,734 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:45:35,734 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:45:35,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:45:35,735 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:45:35,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:45:35,735 INFO L85 PathProgramCache]: Analyzing trace with hash 986992234, now seen corresponding path program 1 times [2021-11-23 02:45:35,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:45:35,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144205018] [2021-11-23 02:45:35,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:45:35,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:45:35,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:45:35,857 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-23 02:45:35,858 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:45:35,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144205018] [2021-11-23 02:45:35,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144205018] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:45:35,858 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:45:35,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:45:35,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214319987] [2021-11-23 02:45:35,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:45:35,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:45:35,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:45:35,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:45:35,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:45:35,861 INFO L87 Difference]: Start difference. First operand 152 states and 202 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, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-23 02:45:35,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:45:35,981 INFO L93 Difference]: Finished difference Result 334 states and 463 transitions. [2021-11-23 02:45:35,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:45:35,981 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, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 74 [2021-11-23 02:45:35,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:45:35,987 INFO L225 Difference]: With dead ends: 334 [2021-11-23 02:45:35,987 INFO L226 Difference]: Without dead ends: 200 [2021-11-23 02:45:35,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:45:36,000 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 57 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:45:36,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 353 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:45:36,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-11-23 02:45:36,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 195. [2021-11-23 02:45:36,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 124 states have (on average 1.403225806451613) internal successors, (174), 125 states have internal predecessors, (174), 52 states have call successors, (52), 18 states have call predecessors, (52), 18 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2021-11-23 02:45:36,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 277 transitions. [2021-11-23 02:45:36,034 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 277 transitions. Word has length 74 [2021-11-23 02:45:36,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:45:36,036 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 277 transitions. [2021-11-23 02:45:36,036 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, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-23 02:45:36,037 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 277 transitions. [2021-11-23 02:45:36,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-23 02:45:36,039 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:45:36,040 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:45:36,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 02:45:36,040 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:45:36,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:45:36,041 INFO L85 PathProgramCache]: Analyzing trace with hash 430471120, now seen corresponding path program 1 times [2021-11-23 02:45:36,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:45:36,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722004985] [2021-11-23 02:45:36,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:45:36,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:45:36,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:45:36,234 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-23 02:45:36,236 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:45:36,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722004985] [2021-11-23 02:45:36,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722004985] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:45:36,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813224619] [2021-11-23 02:45:36,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:45:36,238 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:45:36,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540a0718-bdd0-4204-8ebf-39b2eb3033b6/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:45:36,244 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540a0718-bdd0-4204-8ebf-39b2eb3033b6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:45:36,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540a0718-bdd0-4204-8ebf-39b2eb3033b6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:45:36,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:45:36,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 1020 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:45:36,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:45:36,827 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-23 02:45:36,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:45:37,009 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-23 02:45:37,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813224619] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:45:37,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [395635397] [2021-11-23 02:45:37,032 INFO L159 IcfgInterpreter]: Started Sifa with 64 locations of interest [2021-11-23 02:45:37,033 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:45:37,038 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:45:37,043 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:45:37,044 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:46:05,920 INFO L197 IcfgInterpreter]: Interpreting procedure setClientId with input of size 444 for LOIs [2021-11-23 02:46:06,202 INFO L197 IcfgInterpreter]: Interpreting procedure setClientPrivateKey with input of size 441 for LOIs [2021-11-23 02:46:06,466 INFO L197 IcfgInterpreter]: Interpreting procedure sendEmail with input of size 259 for LOIs [2021-11-23 02:46:08,304 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailTo with input of size 237 for LOIs [2021-11-23 02:46:08,346 INFO L197 IcfgInterpreter]: Interpreting procedure outgoing with input of size 261 for LOIs [2021-11-23 02:46:18,734 INFO L197 IcfgInterpreter]: Interpreting procedure isReadable with input of size 251 for LOIs [2021-11-23 02:46:18,773 INFO L197 IcfgInterpreter]: Interpreting procedure getEmailTo with input of size 251 for LOIs [2021-11-23 02:46:18,820 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailFrom with input of size 449 for LOIs [2021-11-23 02:46:19,369 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:47:23,694 WARN L227 SmtUtils]: Spent 19.00s on a formula simplification. DAG size of input: 587 DAG size of output: 462 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:47:44,756 WARN L227 SmtUtils]: Spent 19.44s on a formula simplification. DAG size of input: 589 DAG size of output: 465 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:47:54,195 WARN L227 SmtUtils]: Spent 8.74s on a formula simplification. DAG size of input: 564 DAG size of output: 359 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:48:03,455 WARN L227 SmtUtils]: Spent 8.56s on a formula simplification. DAG size of input: 560 DAG size of output: 355 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:48:09,664 WARN L227 SmtUtils]: Spent 5.75s on a formula simplification. DAG size of input: 560 DAG size of output: 356 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:48:48,649 WARN L227 SmtUtils]: Spent 6.03s on a formula simplification. DAG size of input: 579 DAG size of output: 409 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:48:57,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [395635397] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:48:57,422 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:48:57,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [4, 4, 4] total 48 [2021-11-23 02:48:57,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420695559] [2021-11-23 02:48:57,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:48:57,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-23 02:48:57,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:48:57,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-23 02:48:57,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=2130, Unknown=0, NotChecked=0, Total=2256 [2021-11-23 02:48:57,426 INFO L87 Difference]: Start difference. First operand 195 states and 277 transitions. Second operand has 43 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 26 states have internal predecessors, (39), 14 states have call successors, (16), 9 states have call predecessors, (16), 7 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2021-11-23 02:49:07,552 WARN L227 SmtUtils]: Spent 8.18s on a formula simplification. DAG size of input: 543 DAG size of output: 427 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:49:16,189 WARN L227 SmtUtils]: Spent 8.26s on a formula simplification. DAG size of input: 545 DAG size of output: 433 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:49:27,714 WARN L227 SmtUtils]: Spent 11.17s on a formula simplification. DAG size of input: 560 DAG size of output: 439 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:49:39,627 WARN L227 SmtUtils]: Spent 11.38s on a formula simplification. DAG size of input: 558 DAG size of output: 435 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:49:48,500 WARN L227 SmtUtils]: Spent 8.34s on a formula simplification. DAG size of input: 551 DAG size of output: 440 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:50:00,548 WARN L227 SmtUtils]: Spent 10.31s on a formula simplification. DAG size of input: 555 DAG size of output: 455 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:50:16,338 WARN L227 SmtUtils]: Spent 13.52s on a formula simplification. DAG size of input: 562 DAG size of output: 457 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:50:28,704 WARN L227 SmtUtils]: Spent 11.99s on a formula simplification. DAG size of input: 592 DAG size of output: 447 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:50:44,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:50:44,198 INFO L93 Difference]: Finished difference Result 552 states and 850 transitions. [2021-11-23 02:50:44,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-23 02:50:44,203 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 26 states have internal predecessors, (39), 14 states have call successors, (16), 9 states have call predecessors, (16), 7 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) Word has length 75 [2021-11-23 02:50:44,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:50:44,209 INFO L225 Difference]: With dead ends: 552 [2021-11-23 02:50:44,209 INFO L226 Difference]: Without dead ends: 375 [2021-11-23 02:50:44,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 245.9s TimeCoverageRelationStatistics Valid=194, Invalid=2886, Unknown=0, NotChecked=0, Total=3080 [2021-11-23 02:50:44,213 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 282 mSDsluCounter, 4096 mSDsCounter, 0 mSdLazyCounter, 5288 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 4237 SdHoareTripleChecker+Invalid, 5320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 5288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:50:44,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 4237 Invalid, 5320 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [32 Valid, 5288 Invalid, 0 Unknown, 0 Unchecked, 18.4s Time] [2021-11-23 02:50:44,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-11-23 02:50:44,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 308. [2021-11-23 02:50:44,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 218 states have (on average 1.4495412844036697) internal successors, (316), 220 states have internal predecessors, (316), 65 states have call successors, (65), 25 states have call predecessors, (65), 24 states have return successors, (65), 62 states have call predecessors, (65), 64 states have call successors, (65) [2021-11-23 02:50:44,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 446 transitions. [2021-11-23 02:50:44,379 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 446 transitions. Word has length 75 [2021-11-23 02:50:44,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:50:44,380 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 446 transitions. [2021-11-23 02:50:44,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 26 states have internal predecessors, (39), 14 states have call successors, (16), 9 states have call predecessors, (16), 7 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2021-11-23 02:50:44,380 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 446 transitions. [2021-11-23 02:50:44,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-23 02:50:44,383 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:50:44,383 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:50:44,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540a0718-bdd0-4204-8ebf-39b2eb3033b6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:50:44,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540a0718-bdd0-4204-8ebf-39b2eb3033b6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:50:44,610 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:50:44,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:50:44,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1417034234, now seen corresponding path program 1 times [2021-11-23 02:50:44,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:50:44,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851731814] [2021-11-23 02:50:44,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:50:44,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:50:44,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:50:44,726 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-23 02:50:44,726 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:50:44,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851731814] [2021-11-23 02:50:44,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851731814] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:50:44,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547755987] [2021-11-23 02:50:44,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:50:44,727 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:50:44,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540a0718-bdd0-4204-8ebf-39b2eb3033b6/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:50:44,739 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540a0718-bdd0-4204-8ebf-39b2eb3033b6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:50:44,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540a0718-bdd0-4204-8ebf-39b2eb3033b6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:50:45,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:50:45,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 1034 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:50:45,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:50:45,155 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-23 02:50:45,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:50:45,303 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-23 02:50:45,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547755987] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:50:45,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [892159268] [2021-11-23 02:50:45,308 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2021-11-23 02:50:45,308 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:50:45,309 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:50:45,310 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:50:45,310 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:51:09,446 INFO L197 IcfgInterpreter]: Interpreting procedure setClientId with input of size 444 for LOIs [2021-11-23 02:51:09,719 INFO L197 IcfgInterpreter]: Interpreting procedure sendEmail with input of size 259 for LOIs [2021-11-23 02:51:11,284 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailTo with input of size 237 for LOIs [2021-11-23 02:51:11,326 INFO L197 IcfgInterpreter]: Interpreting procedure setClientPrivateKey with input of size 441 for LOIs [2021-11-23 02:51:11,569 INFO L197 IcfgInterpreter]: Interpreting procedure outgoing with input of size 259 for LOIs [2021-11-23 02:51:36,571 INFO L197 IcfgInterpreter]: Interpreting procedure isReadable with input of size 251 for LOIs [2021-11-23 02:51:36,609 INFO L197 IcfgInterpreter]: Interpreting procedure getEmailTo with input of size 251 for LOIs [2021-11-23 02:51:36,655 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailFrom with input of size 444 for LOIs [2021-11-23 02:51:37,183 INFO L197 IcfgInterpreter]: Interpreting procedure isVerified with input of size 437 for LOIs [2021-11-23 02:51:37,410 INFO L197 IcfgInterpreter]: Interpreting procedure isSigned with input of size 251 for LOIs [2021-11-23 02:51:37,456 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:52:43,737 WARN L227 SmtUtils]: Spent 20.21s on a formula simplification. DAG size of input: 587 DAG size of output: 462 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:53:07,121 WARN L227 SmtUtils]: Spent 21.31s on a formula simplification. DAG size of input: 589 DAG size of output: 465 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:53:17,010 WARN L227 SmtUtils]: Spent 9.16s on a formula simplification. DAG size of input: 564 DAG size of output: 359 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:53:26,620 WARN L227 SmtUtils]: Spent 8.85s on a formula simplification. DAG size of input: 560 DAG size of output: 355 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:53:32,420 WARN L227 SmtUtils]: Spent 5.35s on a formula simplification. DAG size of input: 560 DAG size of output: 356 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:54:15,920 WARN L227 SmtUtils]: Spent 6.47s on a formula simplification. DAG size of input: 579 DAG size of output: 409 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:54:38,706 WARN L227 SmtUtils]: Spent 8.79s on a formula simplification. DAG size of input: 609 DAG size of output: 414 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:54:55,709 WARN L227 SmtUtils]: Spent 9.20s on a formula simplification. DAG size of input: 607 DAG size of output: 477 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:55:07,437 WARN L227 SmtUtils]: Spent 10.18s on a formula simplification. DAG size of input: 643 DAG size of output: 513 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:55:22,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [892159268] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:55:22,327 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:55:22,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [4, 4, 4] total 58 [2021-11-23 02:55:22,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108207924] [2021-11-23 02:55:22,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:55:22,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-23 02:55:22,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:55:22,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-23 02:55:22,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=3125, Unknown=0, NotChecked=0, Total=3306 [2021-11-23 02:55:22,332 INFO L87 Difference]: Start difference. First operand 308 states and 446 transitions. Second operand has 53 states, 35 states have (on average 1.2) internal successors, (42), 32 states have internal predecessors, (42), 16 states have call successors, (17), 11 states have call predecessors, (17), 9 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2021-11-23 02:55:32,236 WARN L227 SmtUtils]: Spent 7.86s on a formula simplification. DAG size of input: 543 DAG size of output: 427 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:55:40,443 WARN L227 SmtUtils]: Spent 7.87s on a formula simplification. DAG size of input: 545 DAG size of output: 433 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:55:51,899 WARN L227 SmtUtils]: Spent 11.07s on a formula simplification. DAG size of input: 560 DAG size of output: 439 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:56:03,542 WARN L227 SmtUtils]: Spent 11.16s on a formula simplification. DAG size of input: 558 DAG size of output: 435 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:56:12,108 WARN L227 SmtUtils]: Spent 8.09s on a formula simplification. DAG size of input: 551 DAG size of output: 440 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:56:24,340 WARN L227 SmtUtils]: Spent 10.29s on a formula simplification. DAG size of input: 555 DAG size of output: 455 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:56:40,101 WARN L227 SmtUtils]: Spent 13.23s on a formula simplification. DAG size of input: 562 DAG size of output: 457 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:56:52,084 WARN L227 SmtUtils]: Spent 11.60s on a formula simplification. DAG size of input: 592 DAG size of output: 447 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:57:08,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:57:08,188 INFO L93 Difference]: Finished difference Result 459 states and 664 transitions. [2021-11-23 02:57:08,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-11-23 02:57:08,192 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 35 states have (on average 1.2) internal successors, (42), 32 states have internal predecessors, (42), 16 states have call successors, (17), 11 states have call predecessors, (17), 9 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) Word has length 80 [2021-11-23 02:57:08,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:57:08,199 INFO L225 Difference]: With dead ends: 459 [2021-11-23 02:57:08,199 INFO L226 Difference]: Without dead ends: 390 [2021-11-23 02:57:08,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 833 ImplicationChecksByTransitivity, 311.3s TimeCoverageRelationStatistics Valid=249, Invalid=4041, Unknown=0, NotChecked=0, Total=4290 [2021-11-23 02:57:08,202 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 274 mSDsluCounter, 4475 mSDsCounter, 0 mSdLazyCounter, 6332 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 4602 SdHoareTripleChecker+Invalid, 6361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 6332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:57:08,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 4602 Invalid, 6361 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [29 Valid, 6332 Invalid, 0 Unknown, 0 Unchecked, 19.0s Time] [2021-11-23 02:57:08,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-11-23 02:57:08,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 316. [2021-11-23 02:57:08,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 223 states have (on average 1.4394618834080717) internal successors, (321), 225 states have internal predecessors, (321), 66 states have call successors, (66), 27 states have call predecessors, (66), 26 states have return successors, (66), 63 states have call predecessors, (66), 65 states have call successors, (66) [2021-11-23 02:57:08,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 453 transitions. [2021-11-23 02:57:08,340 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 453 transitions. Word has length 80 [2021-11-23 02:57:08,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:57:08,340 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 453 transitions. [2021-11-23 02:57:08,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 35 states have (on average 1.2) internal successors, (42), 32 states have internal predecessors, (42), 16 states have call successors, (17), 11 states have call predecessors, (17), 9 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2021-11-23 02:57:08,341 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 453 transitions. [2021-11-23 02:57:08,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-23 02:57:08,343 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:57:08,343 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:57:08,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540a0718-bdd0-4204-8ebf-39b2eb3033b6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:57:08,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540a0718-bdd0-4204-8ebf-39b2eb3033b6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:57:08,562 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:57:08,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:57:08,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1083298468, now seen corresponding path program 1 times [2021-11-23 02:57:08,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:57:08,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396022644] [2021-11-23 02:57:08,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:57:08,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:57:08,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:57:08,693 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 02:57:08,694 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:57:08,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396022644] [2021-11-23 02:57:08,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396022644] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:57:08,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849916956] [2021-11-23 02:57:08,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:57:08,695 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:57:08,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540a0718-bdd0-4204-8ebf-39b2eb3033b6/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:57:08,696 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540a0718-bdd0-4204-8ebf-39b2eb3033b6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:57:08,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_540a0718-bdd0-4204-8ebf-39b2eb3033b6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 02:57:08,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:57:08,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 1041 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:57:08,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:57:09,071 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 02:57:09,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:57:09,259 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 02:57:09,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849916956] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:57:09,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [445765421] [2021-11-23 02:57:09,267 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2021-11-23 02:57:09,267 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:57:09,268 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:57:09,268 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:57:09,268 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs