java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/product-lines/email_spec4_product24.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:16:27,285 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:16:27,288 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:16:27,305 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:16:27,305 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:16:27,307 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:16:27,310 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:16:27,320 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:16:27,323 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:16:27,324 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:16:27,324 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:16:27,325 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:16:27,326 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:16:27,327 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:16:27,328 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:16:27,329 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:16:27,329 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:16:27,330 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:16:27,332 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:16:27,333 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:16:27,335 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:16:27,336 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:16:27,336 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:16:27,337 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:16:27,341 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 21:16:27,342 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 21:16:27,342 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 21:16:27,343 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 21:16:27,344 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 21:16:27,345 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 21:16:27,346 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 21:16:27,348 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 21:16:27,350 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 21:16:27,351 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 21:16:27,351 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 21:16:27,352 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 21:16:27,352 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 21:16:27,352 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 21:16:27,353 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:16:27,356 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:16:27,360 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:16:27,361 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 21:16:27,382 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:16:27,382 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:16:27,386 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:16:27,387 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:16:27,387 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:16:27,388 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:16:27,388 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:16:27,388 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:16:27,388 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:16:27,388 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:16:27,390 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:16:27,390 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:16:27,390 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:16:27,391 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:16:27,391 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:16:27,391 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:16:27,391 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:16:27,391 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:16:27,392 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:16:27,392 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:16:27,392 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:16:27,393 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:16:27,393 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:16:27,393 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:16:27,393 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:16:27,393 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:16:27,394 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:16:27,394 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:16:27,394 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-13 21:16:27,696 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:16:27,715 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:16:27,718 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:16:27,719 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:16:27,720 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:16:27,721 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/email_spec4_product24.cil.c [2019-10-13 21:16:27,793 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0050142fd/25249ed4a1e44ded923e1e5293edfaa7/FLAGa60740d11 [2019-10-13 21:16:28,403 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:16:28,404 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/email_spec4_product24.cil.c [2019-10-13 21:16:28,439 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0050142fd/25249ed4a1e44ded923e1e5293edfaa7/FLAGa60740d11 [2019-10-13 21:16:28,654 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0050142fd/25249ed4a1e44ded923e1e5293edfaa7 [2019-10-13 21:16:28,664 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:16:28,666 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:16:28,667 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:16:28,667 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:16:28,670 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:16:28,671 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:16:28" (1/1) ... [2019-10-13 21:16:28,674 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@373369a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:16:28, skipping insertion in model container [2019-10-13 21:16:28,675 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:16:28" (1/1) ... [2019-10-13 21:16:28,682 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:16:28,756 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:16:29,469 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:16:29,487 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:16:29,665 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:16:29,745 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:16:29,746 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:16:29 WrapperNode [2019-10-13 21:16:29,746 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:16:29,749 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:16:29,749 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:16:29,749 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:16:29,760 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:16:29" (1/1) ... [2019-10-13 21:16:29,761 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:16:29" (1/1) ... [2019-10-13 21:16:29,801 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:16:29" (1/1) ... [2019-10-13 21:16:29,801 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:16:29" (1/1) ... [2019-10-13 21:16:29,873 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:16:29" (1/1) ... [2019-10-13 21:16:29,907 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:16:29" (1/1) ... [2019-10-13 21:16:29,928 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:16:29" (1/1) ... [2019-10-13 21:16:29,959 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:16:29,960 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:16:29,960 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:16:29,960 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:16:29,961 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:16:29" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:16:30,042 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:16:30,042 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:16:30,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-13 21:16:30,043 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-13 21:16:30,043 INFO L138 BoogieDeclarations]: Found implementation of procedure initClient [2019-10-13 21:16:30,043 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientName [2019-10-13 21:16:30,044 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientName [2019-10-13 21:16:30,044 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientOutbuffer [2019-10-13 21:16:30,044 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientOutbuffer [2019-10-13 21:16:30,044 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientAddressBookSize [2019-10-13 21:16:30,044 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientAddressBookSize [2019-10-13 21:16:30,045 INFO L138 BoogieDeclarations]: Found implementation of procedure createClientAddressBookEntry [2019-10-13 21:16:30,045 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientAddressBookAlias [2019-10-13 21:16:30,045 INFO L138 BoogieDeclarations]: Found implementation of procedure findClientAddressBookAlias [2019-10-13 21:16:30,045 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientAddressBookAlias [2019-10-13 21:16:30,046 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientAddressBookAddress [2019-10-13 21:16:30,046 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientAddressBookAddress [2019-10-13 21:16:30,046 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientAutoResponse [2019-10-13 21:16:30,046 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientAutoResponse [2019-10-13 21:16:30,047 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientPrivateKey [2019-10-13 21:16:30,047 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientPrivateKey [2019-10-13 21:16:30,047 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientKeyringSize [2019-10-13 21:16:30,047 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringSize [2019-10-13 21:16:30,048 INFO L138 BoogieDeclarations]: Found implementation of procedure createClientKeyringEntry [2019-10-13 21:16:30,048 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientKeyringUser [2019-10-13 21:16:30,048 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringUser [2019-10-13 21:16:30,048 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientKeyringPublicKey [2019-10-13 21:16:30,048 INFO L138 BoogieDeclarations]: Found implementation of procedure findPublicKey [2019-10-13 21:16:30,049 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringPublicKey [2019-10-13 21:16:30,049 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientForwardReceiver [2019-10-13 21:16:30,049 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientForwardReceiver [2019-10-13 21:16:30,049 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientId [2019-10-13 21:16:30,049 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientId [2019-10-13 21:16:30,050 INFO L138 BoogieDeclarations]: Found implementation of procedure prompt [2019-10-13 21:16:30,050 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-13 21:16:30,050 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-13 21:16:30,050 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-13 21:16:30,050 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-13 21:16:30,050 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-13 21:16:30,051 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-13 21:16:30,051 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-13 21:16:30,051 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-13 21:16:30,051 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-13 21:16:30,051 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-13 21:16:30,052 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-13 21:16:30,052 INFO L138 BoogieDeclarations]: Found implementation of procedure initEmail [2019-10-13 21:16:30,052 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailId [2019-10-13 21:16:30,052 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailId [2019-10-13 21:16:30,052 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailFrom [2019-10-13 21:16:30,052 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailFrom [2019-10-13 21:16:30,052 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailTo [2019-10-13 21:16:30,053 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailTo [2019-10-13 21:16:30,053 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailSubject [2019-10-13 21:16:30,053 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailSubject [2019-10-13 21:16:30,053 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailBody [2019-10-13 21:16:30,053 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailBody [2019-10-13 21:16:30,054 INFO L138 BoogieDeclarations]: Found implementation of procedure isEncrypted [2019-10-13 21:16:30,054 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailIsEncrypted [2019-10-13 21:16:30,054 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailEncryptionKey [2019-10-13 21:16:30,054 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailEncryptionKey [2019-10-13 21:16:30,054 INFO L138 BoogieDeclarations]: Found implementation of procedure isSigned [2019-10-13 21:16:30,055 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailIsSigned [2019-10-13 21:16:30,055 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailSignKey [2019-10-13 21:16:30,055 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailSignKey [2019-10-13 21:16:30,055 INFO L138 BoogieDeclarations]: Found implementation of procedure isVerified [2019-10-13 21:16:30,055 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailIsSignatureVerified [2019-10-13 21:16:30,056 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_bob__wrappee__Base [2019-10-13 21:16:30,056 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_bob [2019-10-13 21:16:30,056 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_rjh__wrappee__Base [2019-10-13 21:16:30,056 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_rjh [2019-10-13 21:16:30,056 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_chuck__wrappee__Base [2019-10-13 21:16:30,057 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_chuck [2019-10-13 21:16:30,057 INFO L138 BoogieDeclarations]: Found implementation of procedure bobToRjh [2019-10-13 21:16:30,057 INFO L138 BoogieDeclarations]: Found implementation of procedure rjhToBob [2019-10-13 21:16:30,057 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-13 21:16:30,057 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:16:30,057 INFO L138 BoogieDeclarations]: Found implementation of procedure bobKeyAdd [2019-10-13 21:16:30,058 INFO L138 BoogieDeclarations]: Found implementation of procedure rjhKeyAdd [2019-10-13 21:16:30,058 INFO L138 BoogieDeclarations]: Found implementation of procedure rjhKeyAddChuck [2019-10-13 21:16:30,058 INFO L138 BoogieDeclarations]: Found implementation of procedure bobKeyAddChuck [2019-10-13 21:16:30,058 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckKeyAdd [2019-10-13 21:16:30,058 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckKeyAddRjh [2019-10-13 21:16:30,058 INFO L138 BoogieDeclarations]: Found implementation of procedure rjhDeletePrivateKey [2019-10-13 21:16:30,059 INFO L138 BoogieDeclarations]: Found implementation of procedure bobKeyChange [2019-10-13 21:16:30,059 INFO L138 BoogieDeclarations]: Found implementation of procedure rjhKeyChange [2019-10-13 21:16:30,059 INFO L138 BoogieDeclarations]: Found implementation of procedure rjhSetAutoRespond [2019-10-13 21:16:30,059 INFO L138 BoogieDeclarations]: Found implementation of procedure rjhEnableForwarding [2019-10-13 21:16:30,059 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__SignForward_spec__1 [2019-10-13 21:16:30,060 INFO L138 BoogieDeclarations]: Found implementation of procedure printMail__wrappee__AutoResponder [2019-10-13 21:16:30,060 INFO L138 BoogieDeclarations]: Found implementation of procedure printMail__wrappee__Forward [2019-10-13 21:16:30,060 INFO L138 BoogieDeclarations]: Found implementation of procedure printMail [2019-10-13 21:16:30,060 INFO L138 BoogieDeclarations]: Found implementation of procedure isReadable [2019-10-13 21:16:30,060 INFO L138 BoogieDeclarations]: Found implementation of procedure cloneEmail [2019-10-13 21:16:30,060 INFO L138 BoogieDeclarations]: Found implementation of procedure createEmail [2019-10-13 21:16:30,061 INFO L138 BoogieDeclarations]: Found implementation of procedure mail [2019-10-13 21:16:30,061 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing__wrappee__AutoResponder [2019-10-13 21:16:30,061 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing [2019-10-13 21:16:30,061 INFO L138 BoogieDeclarations]: Found implementation of procedure deliver [2019-10-13 21:16:30,061 INFO L138 BoogieDeclarations]: Found implementation of procedure incoming__wrappee__Keys [2019-10-13 21:16:30,061 INFO L138 BoogieDeclarations]: Found implementation of procedure incoming__wrappee__Sign [2019-10-13 21:16:30,062 INFO L138 BoogieDeclarations]: Found implementation of procedure incoming__wrappee__Forward [2019-10-13 21:16:30,062 INFO L138 BoogieDeclarations]: Found implementation of procedure incoming [2019-10-13 21:16:30,062 INFO L138 BoogieDeclarations]: Found implementation of procedure createClient [2019-10-13 21:16:30,062 INFO L138 BoogieDeclarations]: Found implementation of procedure sendEmail [2019-10-13 21:16:30,062 INFO L138 BoogieDeclarations]: Found implementation of procedure queue [2019-10-13 21:16:30,063 INFO L138 BoogieDeclarations]: Found implementation of procedure is_queue_empty [2019-10-13 21:16:30,063 INFO L138 BoogieDeclarations]: Found implementation of procedure get_queued_client [2019-10-13 21:16:30,063 INFO L138 BoogieDeclarations]: Found implementation of procedure get_queued_email [2019-10-13 21:16:30,063 INFO L138 BoogieDeclarations]: Found implementation of procedure isKeyPairValid [2019-10-13 21:16:30,063 INFO L138 BoogieDeclarations]: Found implementation of procedure generateKeyPair [2019-10-13 21:16:30,063 INFO L138 BoogieDeclarations]: Found implementation of procedure autoRespond [2019-10-13 21:16:30,064 INFO L138 BoogieDeclarations]: Found implementation of procedure sign [2019-10-13 21:16:30,064 INFO L138 BoogieDeclarations]: Found implementation of procedure forward [2019-10-13 21:16:30,064 INFO L138 BoogieDeclarations]: Found implementation of procedure verify [2019-10-13 21:16:30,064 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:16:30,064 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:16:30,064 INFO L130 BoogieDeclarations]: Found specification of procedure bobKeyAdd [2019-10-13 21:16:30,064 INFO L130 BoogieDeclarations]: Found specification of procedure rjhSetAutoRespond [2019-10-13 21:16:30,065 INFO L130 BoogieDeclarations]: Found specification of procedure rjhDeletePrivateKey [2019-10-13 21:16:30,065 INFO L130 BoogieDeclarations]: Found specification of procedure rjhKeyAdd [2019-10-13 21:16:30,065 INFO L130 BoogieDeclarations]: Found specification of procedure chuckKeyAddRjh [2019-10-13 21:16:30,065 INFO L130 BoogieDeclarations]: Found specification of procedure rjhEnableForwarding [2019-10-13 21:16:30,065 INFO L130 BoogieDeclarations]: Found specification of procedure rjhKeyChange [2019-10-13 21:16:30,065 INFO L130 BoogieDeclarations]: Found specification of procedure chuckKeyAdd [2019-10-13 21:16:30,066 INFO L130 BoogieDeclarations]: Found specification of procedure bobKeyChange [2019-10-13 21:16:30,066 INFO L130 BoogieDeclarations]: Found specification of procedure bobToRjh [2019-10-13 21:16:30,066 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-13 21:16:30,066 INFO L130 BoogieDeclarations]: Found specification of procedure initClient [2019-10-13 21:16:30,066 INFO L130 BoogieDeclarations]: Found specification of procedure getClientName [2019-10-13 21:16:30,066 INFO L130 BoogieDeclarations]: Found specification of procedure setClientName [2019-10-13 21:16:30,066 INFO L130 BoogieDeclarations]: Found specification of procedure getClientOutbuffer [2019-10-13 21:16:30,067 INFO L130 BoogieDeclarations]: Found specification of procedure setClientOutbuffer [2019-10-13 21:16:30,067 INFO L130 BoogieDeclarations]: Found specification of procedure getClientAddressBookSize [2019-10-13 21:16:30,067 INFO L130 BoogieDeclarations]: Found specification of procedure setClientAddressBookSize [2019-10-13 21:16:30,067 INFO L130 BoogieDeclarations]: Found specification of procedure createClientAddressBookEntry [2019-10-13 21:16:30,067 INFO L130 BoogieDeclarations]: Found specification of procedure getClientAddressBookAlias [2019-10-13 21:16:30,067 INFO L130 BoogieDeclarations]: Found specification of procedure setClientAddressBookAlias [2019-10-13 21:16:30,068 INFO L130 BoogieDeclarations]: Found specification of procedure getClientAddressBookAddress [2019-10-13 21:16:30,068 INFO L130 BoogieDeclarations]: Found specification of procedure setClientAddressBookAddress [2019-10-13 21:16:30,068 INFO L130 BoogieDeclarations]: Found specification of procedure getClientAutoResponse [2019-10-13 21:16:30,068 INFO L130 BoogieDeclarations]: Found specification of procedure setClientAutoResponse [2019-10-13 21:16:30,068 INFO L130 BoogieDeclarations]: Found specification of procedure getClientPrivateKey [2019-10-13 21:16:30,068 INFO L130 BoogieDeclarations]: Found specification of procedure setClientPrivateKey [2019-10-13 21:16:30,069 INFO L130 BoogieDeclarations]: Found specification of procedure getClientKeyringSize [2019-10-13 21:16:30,069 INFO L130 BoogieDeclarations]: Found specification of procedure createClientKeyringEntry [2019-10-13 21:16:30,069 INFO L130 BoogieDeclarations]: Found specification of procedure getClientKeyringUser [2019-10-13 21:16:30,069 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringUser [2019-10-13 21:16:30,069 INFO L130 BoogieDeclarations]: Found specification of procedure getClientKeyringPublicKey [2019-10-13 21:16:30,069 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringPublicKey [2019-10-13 21:16:30,069 INFO L130 BoogieDeclarations]: Found specification of procedure getClientForwardReceiver [2019-10-13 21:16:30,070 INFO L130 BoogieDeclarations]: Found specification of procedure setClientForwardReceiver [2019-10-13 21:16:30,070 INFO L130 BoogieDeclarations]: Found specification of procedure getClientId [2019-10-13 21:16:30,070 INFO L130 BoogieDeclarations]: Found specification of procedure setClientId [2019-10-13 21:16:30,070 INFO L130 BoogieDeclarations]: Found specification of procedure findPublicKey [2019-10-13 21:16:30,070 INFO L130 BoogieDeclarations]: Found specification of procedure findClientAddressBookAlias [2019-10-13 21:16:30,070 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringSize [2019-10-13 21:16:30,070 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-13 21:16:30,071 INFO L130 BoogieDeclarations]: Found specification of procedure prompt [2019-10-13 21:16:30,071 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 21:16:30,071 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-13 21:16:30,071 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-13 21:16:30,071 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-13 21:16:30,071 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-13 21:16:30,071 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-13 21:16:30,072 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-13 21:16:30,072 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 21:16:30,072 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 21:16:30,072 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-13 21:16:30,072 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 21:16:30,073 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 21:16:30,073 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 21:16:30,073 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 21:16:30,073 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-13 21:16:30,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 21:16:30,073 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-13 21:16:30,074 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-13 21:16:30,074 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 21:16:30,074 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-13 21:16:30,074 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-13 21:16:30,074 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-13 21:16:30,075 INFO L130 BoogieDeclarations]: Found specification of procedure initEmail [2019-10-13 21:16:30,075 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailId [2019-10-13 21:16:30,075 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailId [2019-10-13 21:16:30,075 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailFrom [2019-10-13 21:16:30,075 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailFrom [2019-10-13 21:16:30,075 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailTo [2019-10-13 21:16:30,076 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailTo [2019-10-13 21:16:30,076 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailSubject [2019-10-13 21:16:30,076 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailSubject [2019-10-13 21:16:30,076 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailBody [2019-10-13 21:16:30,076 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailBody [2019-10-13 21:16:30,077 INFO L130 BoogieDeclarations]: Found specification of procedure isEncrypted [2019-10-13 21:16:30,077 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailIsEncrypted [2019-10-13 21:16:30,077 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailEncryptionKey [2019-10-13 21:16:30,077 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailEncryptionKey [2019-10-13 21:16:30,077 INFO L130 BoogieDeclarations]: Found specification of procedure isSigned [2019-10-13 21:16:30,077 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailIsSigned [2019-10-13 21:16:30,078 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailSignKey [2019-10-13 21:16:30,078 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailSignKey [2019-10-13 21:16:30,078 INFO L130 BoogieDeclarations]: Found specification of procedure isVerified [2019-10-13 21:16:30,078 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailIsSignatureVerified [2019-10-13 21:16:30,078 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2019-10-13 21:16:30,078 INFO L130 BoogieDeclarations]: Found specification of procedure is_queue_empty [2019-10-13 21:16:30,078 INFO L130 BoogieDeclarations]: Found specification of procedure get_queued_client [2019-10-13 21:16:30,079 INFO L130 BoogieDeclarations]: Found specification of procedure get_queued_email [2019-10-13 21:16:30,079 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing [2019-10-13 21:16:30,079 INFO L130 BoogieDeclarations]: Found specification of procedure sendEmail [2019-10-13 21:16:30,079 INFO L130 BoogieDeclarations]: Found specification of procedure generateKeyPair [2019-10-13 21:16:30,079 INFO L130 BoogieDeclarations]: Found specification of procedure setup_bob [2019-10-13 21:16:30,079 INFO L130 BoogieDeclarations]: Found specification of procedure setup_rjh [2019-10-13 21:16:30,079 INFO L130 BoogieDeclarations]: Found specification of procedure setup_chuck [2019-10-13 21:16:30,080 INFO L130 BoogieDeclarations]: Found specification of procedure rjhToBob [2019-10-13 21:16:30,080 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-13 21:16:30,080 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:16:30,080 INFO L130 BoogieDeclarations]: Found specification of procedure bobKeyAddChuck [2019-10-13 21:16:30,080 INFO L130 BoogieDeclarations]: Found specification of procedure rjhKeyAddChuck [2019-10-13 21:16:30,080 INFO L130 BoogieDeclarations]: Found specification of procedure setup_bob__wrappee__Base [2019-10-13 21:16:30,080 INFO L130 BoogieDeclarations]: Found specification of procedure setup_rjh__wrappee__Base [2019-10-13 21:16:30,081 INFO L130 BoogieDeclarations]: Found specification of procedure setup_chuck__wrappee__Base [2019-10-13 21:16:30,081 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__SignForward_spec__1 [2019-10-13 21:16:30,081 INFO L130 BoogieDeclarations]: Found specification of procedure printMail [2019-10-13 21:16:30,081 INFO L130 BoogieDeclarations]: Found specification of procedure isReadable [2019-10-13 21:16:30,081 INFO L130 BoogieDeclarations]: Found specification of procedure createEmail [2019-10-13 21:16:30,081 INFO L130 BoogieDeclarations]: Found specification of procedure cloneEmail [2019-10-13 21:16:30,082 INFO L130 BoogieDeclarations]: Found specification of procedure printMail__wrappee__AutoResponder [2019-10-13 21:16:30,082 INFO L130 BoogieDeclarations]: Found specification of procedure printMail__wrappee__Forward [2019-10-13 21:16:30,082 INFO L130 BoogieDeclarations]: Found specification of procedure queue [2019-10-13 21:16:30,082 INFO L130 BoogieDeclarations]: Found specification of procedure mail [2019-10-13 21:16:30,082 INFO L130 BoogieDeclarations]: Found specification of procedure deliver [2019-10-13 21:16:30,082 INFO L130 BoogieDeclarations]: Found specification of procedure incoming [2019-10-13 21:16:30,083 INFO L130 BoogieDeclarations]: Found specification of procedure createClient [2019-10-13 21:16:30,083 INFO L130 BoogieDeclarations]: Found specification of procedure isKeyPairValid [2019-10-13 21:16:30,083 INFO L130 BoogieDeclarations]: Found specification of procedure autoRespond [2019-10-13 21:16:30,083 INFO L130 BoogieDeclarations]: Found specification of procedure sign [2019-10-13 21:16:30,083 INFO L130 BoogieDeclarations]: Found specification of procedure forward [2019-10-13 21:16:30,083 INFO L130 BoogieDeclarations]: Found specification of procedure verify [2019-10-13 21:16:30,084 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing__wrappee__AutoResponder [2019-10-13 21:16:30,084 INFO L130 BoogieDeclarations]: Found specification of procedure incoming__wrappee__Keys [2019-10-13 21:16:30,084 INFO L130 BoogieDeclarations]: Found specification of procedure incoming__wrappee__Sign [2019-10-13 21:16:30,084 INFO L130 BoogieDeclarations]: Found specification of procedure incoming__wrappee__Forward [2019-10-13 21:16:30,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:16:30,084 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-13 21:16:30,085 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:16:32,317 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:16:32,317 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-13 21:16:32,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:16:32 BoogieIcfgContainer [2019-10-13 21:16:32,320 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:16:32,321 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:16:32,321 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:16:32,324 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:16:32,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:16:28" (1/3) ... [2019-10-13 21:16:32,326 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@718e8913 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:16:32, skipping insertion in model container [2019-10-13 21:16:32,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:16:29" (2/3) ... [2019-10-13 21:16:32,326 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@718e8913 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:16:32, skipping insertion in model container [2019-10-13 21:16:32,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:16:32" (3/3) ... [2019-10-13 21:16:32,328 INFO L109 eAbstractionObserver]: Analyzing ICFG email_spec4_product24.cil.c [2019-10-13 21:16:32,338 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:16:32,348 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:16:32,361 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:16:32,403 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:16:32,404 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:16:32,404 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:16:32,404 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:16:32,404 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:16:32,404 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:16:32,407 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:16:32,409 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:16:32,448 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states. [2019-10-13 21:16:32,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-10-13 21:16:32,483 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:16:32,485 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:16:32,489 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:16:32,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:16:32,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1143948929, now seen corresponding path program 1 times [2019-10-13 21:16:32,512 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:16:32,513 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826758055] [2019-10-13 21:16:32,513 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:16:32,513 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:16:32,513 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:16:32,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:16:33,284 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:16:33,284 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826758055] [2019-10-13 21:16:33,285 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:16:33,286 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-13 21:16:33,286 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918403304] [2019-10-13 21:16:33,295 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-13 21:16:33,298 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:16:33,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-13 21:16:33,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-13 21:16:33,317 INFO L87 Difference]: Start difference. First operand 526 states. Second operand 2 states. [2019-10-13 21:16:33,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:16:33,411 INFO L93 Difference]: Finished difference Result 783 states and 1023 transitions. [2019-10-13 21:16:33,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-13 21:16:33,413 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 148 [2019-10-13 21:16:33,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:16:33,441 INFO L225 Difference]: With dead ends: 783 [2019-10-13 21:16:33,444 INFO L226 Difference]: Without dead ends: 503 [2019-10-13 21:16:33,451 INFO L600 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 [2019-10-13 21:16:33,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2019-10-13 21:16:33,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 503. [2019-10-13 21:16:33,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 503 states. [2019-10-13 21:16:33,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 663 transitions. [2019-10-13 21:16:33,574 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 663 transitions. Word has length 148 [2019-10-13 21:16:33,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:16:33,576 INFO L462 AbstractCegarLoop]: Abstraction has 503 states and 663 transitions. [2019-10-13 21:16:33,577 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-13 21:16:33,577 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 663 transitions. [2019-10-13 21:16:33,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-10-13 21:16:33,581 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:16:33,581 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:16:33,581 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:16:33,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:16:33,582 INFO L82 PathProgramCache]: Analyzing trace with hash 400393156, now seen corresponding path program 1 times [2019-10-13 21:16:33,582 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:16:33,582 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621445887] [2019-10-13 21:16:33,583 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:16:33,583 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:16:33,583 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:16:33,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:16:33,838 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:16:33,838 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621445887] [2019-10-13 21:16:33,839 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:16:33,839 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 21:16:33,839 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528840374] [2019-10-13 21:16:33,849 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 21:16:33,850 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:16:33,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 21:16:33,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:16:33,851 INFO L87 Difference]: Start difference. First operand 503 states and 663 transitions. Second operand 3 states. [2019-10-13 21:16:33,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:16:33,914 INFO L93 Difference]: Finished difference Result 766 states and 992 transitions. [2019-10-13 21:16:33,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 21:16:33,914 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 149 [2019-10-13 21:16:33,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:16:33,919 INFO L225 Difference]: With dead ends: 766 [2019-10-13 21:16:33,919 INFO L226 Difference]: Without dead ends: 506 [2019-10-13 21:16:33,924 INFO L600 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 [2019-10-13 21:16:33,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2019-10-13 21:16:33,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 505. [2019-10-13 21:16:33,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 505 states. [2019-10-13 21:16:33,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 665 transitions. [2019-10-13 21:16:33,967 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 665 transitions. Word has length 149 [2019-10-13 21:16:33,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:16:33,970 INFO L462 AbstractCegarLoop]: Abstraction has 505 states and 665 transitions. [2019-10-13 21:16:33,970 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 21:16:33,970 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 665 transitions. [2019-10-13 21:16:33,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-10-13 21:16:33,975 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:16:33,976 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:16:33,976 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:16:33,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:16:33,976 INFO L82 PathProgramCache]: Analyzing trace with hash 801384450, now seen corresponding path program 1 times [2019-10-13 21:16:33,977 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:16:33,977 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798841923] [2019-10-13 21:16:33,977 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:16:33,977 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:16:33,977 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:16:34,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:16:34,235 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:16:34,235 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798841923] [2019-10-13 21:16:34,236 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:16:34,236 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 21:16:34,238 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669021383] [2019-10-13 21:16:34,239 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 21:16:34,239 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:16:34,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 21:16:34,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:16:34,240 INFO L87 Difference]: Start difference. First operand 505 states and 665 transitions. Second operand 3 states. [2019-10-13 21:16:34,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:16:34,279 INFO L93 Difference]: Finished difference Result 988 states and 1331 transitions. [2019-10-13 21:16:34,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 21:16:34,279 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 161 [2019-10-13 21:16:34,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:16:34,283 INFO L225 Difference]: With dead ends: 988 [2019-10-13 21:16:34,283 INFO L226 Difference]: Without dead ends: 548 [2019-10-13 21:16:34,285 INFO L600 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 [2019-10-13 21:16:34,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2019-10-13 21:16:34,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 547. [2019-10-13 21:16:34,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 547 states. [2019-10-13 21:16:34,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 737 transitions. [2019-10-13 21:16:34,311 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 737 transitions. Word has length 161 [2019-10-13 21:16:34,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:16:34,311 INFO L462 AbstractCegarLoop]: Abstraction has 547 states and 737 transitions. [2019-10-13 21:16:34,312 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 21:16:34,312 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 737 transitions. [2019-10-13 21:16:34,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-10-13 21:16:34,315 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:16:34,315 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:16:34,315 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:16:34,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:16:34,316 INFO L82 PathProgramCache]: Analyzing trace with hash 710621825, now seen corresponding path program 1 times [2019-10-13 21:16:34,316 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:16:34,316 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933876575] [2019-10-13 21:16:34,317 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:16:34,317 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:16:34,317 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:16:34,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:16:34,440 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:16:34,441 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933876575] [2019-10-13 21:16:34,441 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:16:34,441 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 21:16:34,442 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342256953] [2019-10-13 21:16:34,442 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 21:16:34,442 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:16:34,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 21:16:34,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:16:34,443 INFO L87 Difference]: Start difference. First operand 547 states and 737 transitions. Second operand 3 states. [2019-10-13 21:16:34,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:16:34,477 INFO L93 Difference]: Finished difference Result 1111 states and 1542 transitions. [2019-10-13 21:16:34,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 21:16:34,478 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 162 [2019-10-13 21:16:34,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:16:34,482 INFO L225 Difference]: With dead ends: 1111 [2019-10-13 21:16:34,483 INFO L226 Difference]: Without dead ends: 629 [2019-10-13 21:16:34,485 INFO L600 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 [2019-10-13 21:16:34,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2019-10-13 21:16:34,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 628. [2019-10-13 21:16:34,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 628 states. [2019-10-13 21:16:34,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 875 transitions. [2019-10-13 21:16:34,511 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 875 transitions. Word has length 162 [2019-10-13 21:16:34,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:16:34,512 INFO L462 AbstractCegarLoop]: Abstraction has 628 states and 875 transitions. [2019-10-13 21:16:34,512 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 21:16:34,512 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 875 transitions. [2019-10-13 21:16:34,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-10-13 21:16:34,516 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:16:34,517 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:16:34,517 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:16:34,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:16:34,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1652131102, now seen corresponding path program 1 times [2019-10-13 21:16:34,517 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:16:34,518 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927994749] [2019-10-13 21:16:34,518 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:16:34,518 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:16:34,518 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:16:34,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:16:34,790 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:16:34,791 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927994749] [2019-10-13 21:16:34,791 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:16:34,792 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 21:16:34,792 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519164999] [2019-10-13 21:16:34,793 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:16:34,793 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:16:34,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:16:34,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:16:34,794 INFO L87 Difference]: Start difference. First operand 628 states and 875 transitions. Second operand 7 states. [2019-10-13 21:16:38,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:16:38,031 INFO L93 Difference]: Finished difference Result 1140 states and 1524 transitions. [2019-10-13 21:16:38,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 21:16:38,032 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 165 [2019-10-13 21:16:38,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:16:38,037 INFO L225 Difference]: With dead ends: 1140 [2019-10-13 21:16:38,038 INFO L226 Difference]: Without dead ends: 891 [2019-10-13 21:16:38,039 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2019-10-13 21:16:38,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2019-10-13 21:16:38,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 882. [2019-10-13 21:16:38,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 882 states. [2019-10-13 21:16:38,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 1198 transitions. [2019-10-13 21:16:38,085 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 1198 transitions. Word has length 165 [2019-10-13 21:16:38,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:16:38,086 INFO L462 AbstractCegarLoop]: Abstraction has 882 states and 1198 transitions. [2019-10-13 21:16:38,086 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:16:38,086 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 1198 transitions. [2019-10-13 21:16:38,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-10-13 21:16:38,090 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:16:38,090 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:16:38,090 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:16:38,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:16:38,091 INFO L82 PathProgramCache]: Analyzing trace with hash -179891340, now seen corresponding path program 1 times [2019-10-13 21:16:38,091 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:16:38,091 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555262238] [2019-10-13 21:16:38,091 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:16:38,091 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:16:38,092 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:16:38,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:16:38,450 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:16:38,450 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555262238] [2019-10-13 21:16:38,451 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:16:38,452 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2019-10-13 21:16:38,452 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282908264] [2019-10-13 21:16:38,452 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-13 21:16:38,453 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:16:38,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-13 21:16:38,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2019-10-13 21:16:38,454 INFO L87 Difference]: Start difference. First operand 882 states and 1198 transitions. Second operand 16 states. [2019-10-13 21:16:38,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:16:38,815 INFO L93 Difference]: Finished difference Result 1441 states and 1915 transitions. [2019-10-13 21:16:38,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-13 21:16:38,816 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 166 [2019-10-13 21:16:38,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:16:38,825 INFO L225 Difference]: With dead ends: 1441 [2019-10-13 21:16:38,825 INFO L226 Difference]: Without dead ends: 914 [2019-10-13 21:16:38,828 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2019-10-13 21:16:38,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 914 states. [2019-10-13 21:16:38,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 914 to 910. [2019-10-13 21:16:38,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 910 states. [2019-10-13 21:16:38,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 1235 transitions. [2019-10-13 21:16:38,881 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 1235 transitions. Word has length 166 [2019-10-13 21:16:38,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:16:38,884 INFO L462 AbstractCegarLoop]: Abstraction has 910 states and 1235 transitions. [2019-10-13 21:16:38,884 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-13 21:16:38,884 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 1235 transitions. [2019-10-13 21:16:38,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-10-13 21:16:38,889 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:16:38,889 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:16:38,889 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:16:38,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:16:38,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1824277491, now seen corresponding path program 1 times [2019-10-13 21:16:38,890 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:16:38,890 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309444815] [2019-10-13 21:16:38,890 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:16:38,890 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:16:38,891 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:16:38,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:16:39,094 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:16:39,095 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309444815] [2019-10-13 21:16:39,098 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:16:39,099 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 21:16:39,099 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098086882] [2019-10-13 21:16:39,099 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 21:16:39,100 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:16:39,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 21:16:39,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:16:39,100 INFO L87 Difference]: Start difference. First operand 910 states and 1235 transitions. Second operand 8 states. [2019-10-13 21:16:40,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:16:40,219 INFO L93 Difference]: Finished difference Result 1561 states and 2068 transitions. [2019-10-13 21:16:40,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 21:16:40,219 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 175 [2019-10-13 21:16:40,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:16:40,230 INFO L225 Difference]: With dead ends: 1561 [2019-10-13 21:16:40,230 INFO L226 Difference]: Without dead ends: 1474 [2019-10-13 21:16:40,234 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2019-10-13 21:16:40,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1474 states. [2019-10-13 21:16:40,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1474 to 1461. [2019-10-13 21:16:40,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1461 states. [2019-10-13 21:16:40,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1461 states to 1461 states and 1946 transitions. [2019-10-13 21:16:40,325 INFO L78 Accepts]: Start accepts. Automaton has 1461 states and 1946 transitions. Word has length 175 [2019-10-13 21:16:40,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:16:40,326 INFO L462 AbstractCegarLoop]: Abstraction has 1461 states and 1946 transitions. [2019-10-13 21:16:40,326 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 21:16:40,326 INFO L276 IsEmpty]: Start isEmpty. Operand 1461 states and 1946 transitions. [2019-10-13 21:16:40,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2019-10-13 21:16:40,330 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:16:40,330 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:16:40,330 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:16:40,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:16:40,331 INFO L82 PathProgramCache]: Analyzing trace with hash -819623501, now seen corresponding path program 1 times [2019-10-13 21:16:40,331 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:16:40,331 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326383912] [2019-10-13 21:16:40,331 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:16:40,332 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:16:40,332 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:16:40,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:16:40,585 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-10-13 21:16:40,586 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326383912] [2019-10-13 21:16:40,586 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:16:40,586 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2019-10-13 21:16:40,586 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160415104] [2019-10-13 21:16:40,587 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-13 21:16:40,587 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:16:40,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-13 21:16:40,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2019-10-13 21:16:40,588 INFO L87 Difference]: Start difference. First operand 1461 states and 1946 transitions. Second operand 15 states. [2019-10-13 21:16:41,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:16:41,127 INFO L93 Difference]: Finished difference Result 1982 states and 2605 transitions. [2019-10-13 21:16:41,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-13 21:16:41,127 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 176 [2019-10-13 21:16:41,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:16:41,136 INFO L225 Difference]: With dead ends: 1982 [2019-10-13 21:16:41,136 INFO L226 Difference]: Without dead ends: 1460 [2019-10-13 21:16:41,139 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2019-10-13 21:16:41,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2019-10-13 21:16:41,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 1459. [2019-10-13 21:16:41,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1459 states. [2019-10-13 21:16:41,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1459 states to 1459 states and 1941 transitions. [2019-10-13 21:16:41,211 INFO L78 Accepts]: Start accepts. Automaton has 1459 states and 1941 transitions. Word has length 176 [2019-10-13 21:16:41,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:16:41,212 INFO L462 AbstractCegarLoop]: Abstraction has 1459 states and 1941 transitions. [2019-10-13 21:16:41,212 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-13 21:16:41,212 INFO L276 IsEmpty]: Start isEmpty. Operand 1459 states and 1941 transitions. [2019-10-13 21:16:41,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2019-10-13 21:16:41,216 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:16:41,216 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:16:41,217 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:16:41,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:16:41,217 INFO L82 PathProgramCache]: Analyzing trace with hash -429039633, now seen corresponding path program 2 times [2019-10-13 21:16:41,217 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:16:41,217 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179820380] [2019-10-13 21:16:41,218 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:16:41,218 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:16:41,218 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:16:41,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:16:41,520 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-10-13 21:16:41,520 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179820380] [2019-10-13 21:16:41,522 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178118838] [2019-10-13 21:16:41,522 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:16:42,031 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2019-10-13 21:16:42,031 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 21:16:42,039 INFO L256 TraceCheckSpWp]: Trace formula consists of 1962 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-13 21:16:42,056 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:16:42,232 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-10-13 21:16:42,233 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:16:42,801 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-10-13 21:16:42,802 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:16:42,802 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [11] total 23 [2019-10-13 21:16:42,802 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185615479] [2019-10-13 21:16:42,803 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 21:16:42,803 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:16:42,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 21:16:42,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2019-10-13 21:16:42,804 INFO L87 Difference]: Start difference. First operand 1459 states and 1941 transitions. Second operand 14 states. [2019-10-13 21:16:45,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:16:45,006 INFO L93 Difference]: Finished difference Result 4329 states and 5810 transitions. [2019-10-13 21:16:45,007 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-13 21:16:45,007 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 176 [2019-10-13 21:16:45,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:16:45,038 INFO L225 Difference]: With dead ends: 4329 [2019-10-13 21:16:45,038 INFO L226 Difference]: Without dead ends: 4322 [2019-10-13 21:16:45,042 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 346 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=178, Invalid=1228, Unknown=0, NotChecked=0, Total=1406 [2019-10-13 21:16:45,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4322 states. [2019-10-13 21:16:45,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4322 to 3217. [2019-10-13 21:16:45,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3217 states. [2019-10-13 21:16:45,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3217 states to 3217 states and 4397 transitions. [2019-10-13 21:16:45,357 INFO L78 Accepts]: Start accepts. Automaton has 3217 states and 4397 transitions. Word has length 176 [2019-10-13 21:16:45,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:16:45,359 INFO L462 AbstractCegarLoop]: Abstraction has 3217 states and 4397 transitions. [2019-10-13 21:16:45,359 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 21:16:45,359 INFO L276 IsEmpty]: Start isEmpty. Operand 3217 states and 4397 transitions. [2019-10-13 21:16:45,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-10-13 21:16:45,370 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:16:45,371 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:16:45,580 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:16:45,581 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:16:45,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:16:45,581 INFO L82 PathProgramCache]: Analyzing trace with hash 981873406, now seen corresponding path program 1 times [2019-10-13 21:16:45,582 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:16:45,582 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488922511] [2019-10-13 21:16:45,582 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:16:45,583 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:16:45,583 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:16:45,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:16:45,820 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2019-10-13 21:16:45,821 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488922511] [2019-10-13 21:16:45,821 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300407872] [2019-10-13 21:16:45,821 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:16:46,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:16:46,539 INFO L256 TraceCheckSpWp]: Trace formula consists of 2517 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 21:16:46,557 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:16:46,747 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:16:46,747 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:16:47,090 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:16:47,219 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 21:16:47,305 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 21:16:47,421 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-13 21:16:47,422 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:16:47,422 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11, 9] total 24 [2019-10-13 21:16:47,422 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960096210] [2019-10-13 21:16:47,423 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 21:16:47,423 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:16:47,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 21:16:47,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2019-10-13 21:16:47,424 INFO L87 Difference]: Start difference. First operand 3217 states and 4397 transitions. Second operand 9 states. [2019-10-13 21:16:48,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:16:48,804 INFO L93 Difference]: Finished difference Result 6408 states and 8768 transitions. [2019-10-13 21:16:48,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 21:16:48,805 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 178 [2019-10-13 21:16:48,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:16:48,823 INFO L225 Difference]: With dead ends: 6408 [2019-10-13 21:16:48,824 INFO L226 Difference]: Without dead ends: 3235 [2019-10-13 21:16:48,834 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 340 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2019-10-13 21:16:48,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3235 states. [2019-10-13 21:16:49,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3235 to 3235. [2019-10-13 21:16:49,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3235 states. [2019-10-13 21:16:49,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3235 states to 3235 states and 4418 transitions. [2019-10-13 21:16:49,043 INFO L78 Accepts]: Start accepts. Automaton has 3235 states and 4418 transitions. Word has length 178 [2019-10-13 21:16:49,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:16:49,043 INFO L462 AbstractCegarLoop]: Abstraction has 3235 states and 4418 transitions. [2019-10-13 21:16:49,043 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 21:16:49,044 INFO L276 IsEmpty]: Start isEmpty. Operand 3235 states and 4418 transitions. [2019-10-13 21:16:49,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-10-13 21:16:49,053 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:16:49,053 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:16:49,262 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:16:49,263 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:16:49,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:16:49,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1742506656, now seen corresponding path program 1 times [2019-10-13 21:16:49,263 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:16:49,264 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935917993] [2019-10-13 21:16:49,264 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:16:49,264 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:16:49,264 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:16:49,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:16:49,516 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2019-10-13 21:16:49,517 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935917993] [2019-10-13 21:16:49,517 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204998925] [2019-10-13 21:16:49,517 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:16:50,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:16:50,141 INFO L256 TraceCheckSpWp]: Trace formula consists of 2518 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 21:16:50,152 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:16:50,279 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:16:50,279 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:16:50,580 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 21:16:50,634 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 21:16:50,686 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-13 21:16:50,686 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:16:50,687 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11, 7] total 20 [2019-10-13 21:16:50,687 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712441030] [2019-10-13 21:16:50,687 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:16:50,688 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:16:50,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:16:50,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2019-10-13 21:16:50,688 INFO L87 Difference]: Start difference. First operand 3235 states and 4418 transitions. Second operand 7 states. [2019-10-13 21:16:51,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:16:51,898 INFO L93 Difference]: Finished difference Result 6378 states and 8729 transitions. [2019-10-13 21:16:51,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:16:51,899 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 179 [2019-10-13 21:16:51,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:16:51,919 INFO L225 Difference]: With dead ends: 6378 [2019-10-13 21:16:51,919 INFO L226 Difference]: Without dead ends: 3235 [2019-10-13 21:16:51,930 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 347 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2019-10-13 21:16:51,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3235 states. [2019-10-13 21:16:52,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3235 to 3235. [2019-10-13 21:16:52,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3235 states. [2019-10-13 21:16:52,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3235 states to 3235 states and 4404 transitions. [2019-10-13 21:16:52,190 INFO L78 Accepts]: Start accepts. Automaton has 3235 states and 4404 transitions. Word has length 179 [2019-10-13 21:16:52,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:16:52,190 INFO L462 AbstractCegarLoop]: Abstraction has 3235 states and 4404 transitions. [2019-10-13 21:16:52,190 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:16:52,191 INFO L276 IsEmpty]: Start isEmpty. Operand 3235 states and 4404 transitions. [2019-10-13 21:16:52,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2019-10-13 21:16:52,208 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:16:52,208 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:16:52,417 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:16:52,417 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:16:52,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:16:52,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1605662600, now seen corresponding path program 1 times [2019-10-13 21:16:52,418 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:16:52,418 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28714875] [2019-10-13 21:16:52,419 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:16:52,419 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:16:52,419 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:16:52,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:16:52,604 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-10-13 21:16:52,604 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28714875] [2019-10-13 21:16:52,605 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292823695] [2019-10-13 21:16:52,605 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:16:53,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:16:53,308 INFO L256 TraceCheckSpWp]: Trace formula consists of 2513 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 21:16:53,315 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:16:53,416 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:16:53,416 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:16:53,695 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 21:16:53,737 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 21:16:53,772 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-10-13 21:16:53,773 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:16:53,773 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 16 [2019-10-13 21:16:53,773 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225322002] [2019-10-13 21:16:53,774 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:16:53,774 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:16:53,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:16:53,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2019-10-13 21:16:53,775 INFO L87 Difference]: Start difference. First operand 3235 states and 4404 transitions. Second operand 7 states. [2019-10-13 21:16:55,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:16:55,020 INFO L93 Difference]: Finished difference Result 6094 states and 8235 transitions. [2019-10-13 21:16:55,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:16:55,021 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 180 [2019-10-13 21:16:55,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:16:55,043 INFO L225 Difference]: With dead ends: 6094 [2019-10-13 21:16:55,043 INFO L226 Difference]: Without dead ends: 3247 [2019-10-13 21:16:55,122 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 349 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2019-10-13 21:16:55,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3247 states. [2019-10-13 21:16:55,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3247 to 3235. [2019-10-13 21:16:55,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3235 states. [2019-10-13 21:16:55,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3235 states to 3235 states and 4402 transitions. [2019-10-13 21:16:55,286 INFO L78 Accepts]: Start accepts. Automaton has 3235 states and 4402 transitions. Word has length 180 [2019-10-13 21:16:55,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:16:55,287 INFO L462 AbstractCegarLoop]: Abstraction has 3235 states and 4402 transitions. [2019-10-13 21:16:55,287 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:16:55,287 INFO L276 IsEmpty]: Start isEmpty. Operand 3235 states and 4402 transitions. [2019-10-13 21:16:55,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2019-10-13 21:16:55,295 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:16:55,296 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:16:55,506 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:16:55,507 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:16:55,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:16:55,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1088226972, now seen corresponding path program 1 times [2019-10-13 21:16:55,508 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:16:55,508 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99497034] [2019-10-13 21:16:55,509 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:16:55,509 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:16:55,509 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:16:55,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:16:55,625 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-10-13 21:16:55,626 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99497034] [2019-10-13 21:16:55,627 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317512935] [2019-10-13 21:16:55,627 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:16:56,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:16:56,147 INFO L256 TraceCheckSpWp]: Trace formula consists of 2511 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 21:16:56,152 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:16:56,274 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:16:56,274 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:16:56,652 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:16:56,735 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 21:16:56,799 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 21:16:56,907 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-10-13 21:16:56,908 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:16:56,908 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [7] total 21 [2019-10-13 21:16:56,908 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947323036] [2019-10-13 21:16:56,909 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-13 21:16:56,909 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:16:56,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-13 21:16:56,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2019-10-13 21:16:56,910 INFO L87 Difference]: Start difference. First operand 3235 states and 4402 transitions. Second operand 16 states. [2019-10-13 21:16:59,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:16:59,160 INFO L93 Difference]: Finished difference Result 6406 states and 8731 transitions. [2019-10-13 21:16:59,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 21:16:59,161 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 181 [2019-10-13 21:16:59,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:16:59,178 INFO L225 Difference]: With dead ends: 6406 [2019-10-13 21:16:59,178 INFO L226 Difference]: Without dead ends: 3257 [2019-10-13 21:16:59,187 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 346 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2019-10-13 21:16:59,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3257 states. [2019-10-13 21:16:59,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3257 to 3255. [2019-10-13 21:16:59,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3255 states. [2019-10-13 21:16:59,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3255 states to 3255 states and 4424 transitions. [2019-10-13 21:16:59,333 INFO L78 Accepts]: Start accepts. Automaton has 3255 states and 4424 transitions. Word has length 181 [2019-10-13 21:16:59,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:16:59,334 INFO L462 AbstractCegarLoop]: Abstraction has 3255 states and 4424 transitions. [2019-10-13 21:16:59,334 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-13 21:16:59,334 INFO L276 IsEmpty]: Start isEmpty. Operand 3255 states and 4424 transitions. [2019-10-13 21:16:59,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2019-10-13 21:16:59,342 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:16:59,343 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:16:59,550 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:16:59,550 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:16:59,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:16:59,550 INFO L82 PathProgramCache]: Analyzing trace with hash 360391850, now seen corresponding path program 2 times [2019-10-13 21:16:59,550 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:16:59,551 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179963909] [2019-10-13 21:16:59,551 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:16:59,551 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:16:59,551 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:16:59,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:16:59,655 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-13 21:16:59,655 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179963909] [2019-10-13 21:16:59,659 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891494972] [2019-10-13 21:16:59,660 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:17:00,263 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-13 21:17:00,263 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 21:17:00,270 INFO L256 TraceCheckSpWp]: Trace formula consists of 2407 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 21:17:00,275 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:17:00,369 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:17:00,370 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:17:00,611 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 21:17:00,660 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms