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_product30.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:16:32,181 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:16:32,183 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:16:32,196 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:16:32,196 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:16:32,197 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:16:32,199 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:16:32,200 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:16:32,202 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:16:32,203 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:16:32,204 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:16:32,205 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:16:32,206 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:16:32,207 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:16:32,208 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:16:32,209 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:16:32,210 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:16:32,211 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:16:32,213 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:16:32,215 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:16:32,217 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:16:32,218 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:16:32,220 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:16:32,220 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:16:32,223 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 21:16:32,223 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 21:16:32,223 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 21:16:32,224 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 21:16:32,225 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 21:16:32,226 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 21:16:32,226 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 21:16:32,227 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 21:16:32,228 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 21:16:32,228 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 21:16:32,229 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 21:16:32,230 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 21:16:32,230 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 21:16:32,231 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 21:16:32,231 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:16:32,232 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:16:32,233 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:16:32,233 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 21:16:32,248 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:16:32,248 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:16:32,249 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:16:32,250 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:16:32,250 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:16:32,250 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:16:32,250 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:16:32,250 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:16:32,251 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:16:32,251 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:16:32,251 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:16:32,251 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:16:32,251 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:16:32,252 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:16:32,252 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:16:32,253 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:16:32,253 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:16:32,253 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:16:32,253 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:16:32,253 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:16:32,254 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:16:32,254 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:16:32,254 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:16:32,254 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:16:32,254 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:16:32,255 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:16:32,255 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:16:32,255 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:16:32,255 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 21:16:32,543 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:16:32,565 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:16:32,569 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:16:32,570 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:16:32,571 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:16:32,572 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/email_spec4_product30.cil.c [2019-10-13 21:16:32,651 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43bcf9ee0/6092c0aa6f49410885533bb5d54c64f9/FLAG529b400fb [2019-10-13 21:16:33,292 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:16:33,292 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/email_spec4_product30.cil.c [2019-10-13 21:16:33,314 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43bcf9ee0/6092c0aa6f49410885533bb5d54c64f9/FLAG529b400fb [2019-10-13 21:16:33,443 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43bcf9ee0/6092c0aa6f49410885533bb5d54c64f9 [2019-10-13 21:16:33,454 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:16:33,456 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:16:33,457 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:16:33,458 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:16:33,461 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:16:33,462 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:16:33" (1/1) ... [2019-10-13 21:16:33,466 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@744cbd26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:16:33, skipping insertion in model container [2019-10-13 21:16:33,466 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:16:33" (1/1) ... [2019-10-13 21:16:33,474 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:16:33,567 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:16:34,365 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:16:34,390 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:16:34,546 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:16:34,645 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:16:34,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:16:34 WrapperNode [2019-10-13 21:16:34,646 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:16:34,647 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:16:34,647 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:16:34,647 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:16:34,658 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:16:34" (1/1) ... [2019-10-13 21:16:34,658 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:16:34" (1/1) ... [2019-10-13 21:16:34,702 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:16:34" (1/1) ... [2019-10-13 21:16:34,702 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:16:34" (1/1) ... [2019-10-13 21:16:34,765 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:16:34" (1/1) ... [2019-10-13 21:16:34,790 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:16:34" (1/1) ... [2019-10-13 21:16:34,806 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:16:34" (1/1) ... [2019-10-13 21:16:34,827 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:16:34,828 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:16:34,828 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:16:34,828 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:16:34,834 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:16:34" (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 21:16:34,928 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:16:34,928 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:16:34,929 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-13 21:16:34,929 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-13 21:16:34,929 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-13 21:16:34,930 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-13 21:16:34,931 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-13 21:16:34,932 INFO L138 BoogieDeclarations]: Found implementation of procedure prompt [2019-10-13 21:16:34,932 INFO L138 BoogieDeclarations]: Found implementation of procedure mail [2019-10-13 21:16:34,933 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing__wrappee__Keys [2019-10-13 21:16:34,933 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing__wrappee__AutoResponder [2019-10-13 21:16:34,933 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing [2019-10-13 21:16:34,934 INFO L138 BoogieDeclarations]: Found implementation of procedure deliver [2019-10-13 21:16:34,935 INFO L138 BoogieDeclarations]: Found implementation of procedure incoming__wrappee__Encrypt [2019-10-13 21:16:34,935 INFO L138 BoogieDeclarations]: Found implementation of procedure incoming__wrappee__Sign [2019-10-13 21:16:34,935 INFO L138 BoogieDeclarations]: Found implementation of procedure incoming__wrappee__Verify [2019-10-13 21:16:34,938 INFO L138 BoogieDeclarations]: Found implementation of procedure incoming [2019-10-13 21:16:34,939 INFO L138 BoogieDeclarations]: Found implementation of procedure createClient [2019-10-13 21:16:34,939 INFO L138 BoogieDeclarations]: Found implementation of procedure sendEmail [2019-10-13 21:16:34,939 INFO L138 BoogieDeclarations]: Found implementation of procedure queue [2019-10-13 21:16:34,939 INFO L138 BoogieDeclarations]: Found implementation of procedure is_queue_empty [2019-10-13 21:16:34,940 INFO L138 BoogieDeclarations]: Found implementation of procedure get_queued_client [2019-10-13 21:16:34,940 INFO L138 BoogieDeclarations]: Found implementation of procedure get_queued_email [2019-10-13 21:16:34,940 INFO L138 BoogieDeclarations]: Found implementation of procedure isKeyPairValid [2019-10-13 21:16:34,940 INFO L138 BoogieDeclarations]: Found implementation of procedure generateKeyPair [2019-10-13 21:16:34,941 INFO L138 BoogieDeclarations]: Found implementation of procedure autoRespond [2019-10-13 21:16:34,941 INFO L138 BoogieDeclarations]: Found implementation of procedure sign [2019-10-13 21:16:34,941 INFO L138 BoogieDeclarations]: Found implementation of procedure verify [2019-10-13 21:16:34,941 INFO L138 BoogieDeclarations]: Found implementation of procedure printMail__wrappee__Keys [2019-10-13 21:16:34,941 INFO L138 BoogieDeclarations]: Found implementation of procedure printMail__wrappee__AutoResponder [2019-10-13 21:16:34,942 INFO L138 BoogieDeclarations]: Found implementation of procedure printMail__wrappee__Sign [2019-10-13 21:16:34,942 INFO L138 BoogieDeclarations]: Found implementation of procedure printMail [2019-10-13 21:16:34,942 INFO L138 BoogieDeclarations]: Found implementation of procedure isReadable__wrappee__Keys [2019-10-13 21:16:34,942 INFO L138 BoogieDeclarations]: Found implementation of procedure isReadable [2019-10-13 21:16:34,942 INFO L138 BoogieDeclarations]: Found implementation of procedure cloneEmail [2019-10-13 21:16:34,943 INFO L138 BoogieDeclarations]: Found implementation of procedure createEmail [2019-10-13 21:16:34,943 INFO L138 BoogieDeclarations]: Found implementation of procedure initClient [2019-10-13 21:16:34,943 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientName [2019-10-13 21:16:34,944 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientName [2019-10-13 21:16:34,944 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientOutbuffer [2019-10-13 21:16:34,944 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientOutbuffer [2019-10-13 21:16:34,944 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientAddressBookSize [2019-10-13 21:16:34,945 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientAddressBookSize [2019-10-13 21:16:34,945 INFO L138 BoogieDeclarations]: Found implementation of procedure createClientAddressBookEntry [2019-10-13 21:16:34,945 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientAddressBookAlias [2019-10-13 21:16:34,945 INFO L138 BoogieDeclarations]: Found implementation of procedure findClientAddressBookAlias [2019-10-13 21:16:34,946 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientAddressBookAlias [2019-10-13 21:16:34,946 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientAddressBookAddress [2019-10-13 21:16:34,946 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientAddressBookAddress [2019-10-13 21:16:34,946 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientAutoResponse [2019-10-13 21:16:34,946 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientAutoResponse [2019-10-13 21:16:34,946 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientPrivateKey [2019-10-13 21:16:34,947 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientPrivateKey [2019-10-13 21:16:34,947 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientKeyringSize [2019-10-13 21:16:34,947 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringSize [2019-10-13 21:16:34,947 INFO L138 BoogieDeclarations]: Found implementation of procedure createClientKeyringEntry [2019-10-13 21:16:34,947 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientKeyringUser [2019-10-13 21:16:34,948 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringUser [2019-10-13 21:16:34,948 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientKeyringPublicKey [2019-10-13 21:16:34,948 INFO L138 BoogieDeclarations]: Found implementation of procedure findPublicKey [2019-10-13 21:16:34,948 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringPublicKey [2019-10-13 21:16:34,948 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientForwardReceiver [2019-10-13 21:16:34,949 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientForwardReceiver [2019-10-13 21:16:34,949 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientId [2019-10-13 21:16:34,950 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientId [2019-10-13 21:16:34,950 INFO L138 BoogieDeclarations]: Found implementation of procedure initEmail [2019-10-13 21:16:34,950 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailId [2019-10-13 21:16:34,950 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailId [2019-10-13 21:16:34,950 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailFrom [2019-10-13 21:16:34,951 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailFrom [2019-10-13 21:16:34,951 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailTo [2019-10-13 21:16:34,951 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailTo [2019-10-13 21:16:34,951 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailSubject [2019-10-13 21:16:34,952 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailSubject [2019-10-13 21:16:34,953 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailBody [2019-10-13 21:16:34,953 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailBody [2019-10-13 21:16:34,953 INFO L138 BoogieDeclarations]: Found implementation of procedure isEncrypted [2019-10-13 21:16:34,953 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailIsEncrypted [2019-10-13 21:16:34,953 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailEncryptionKey [2019-10-13 21:16:34,954 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailEncryptionKey [2019-10-13 21:16:34,955 INFO L138 BoogieDeclarations]: Found implementation of procedure isSigned [2019-10-13 21:16:34,955 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailIsSigned [2019-10-13 21:16:34,955 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailSignKey [2019-10-13 21:16:34,955 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailSignKey [2019-10-13 21:16:34,955 INFO L138 BoogieDeclarations]: Found implementation of procedure isVerified [2019-10-13 21:16:34,957 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailIsSignatureVerified [2019-10-13 21:16:34,957 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_bob__wrappee__Base [2019-10-13 21:16:34,958 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_bob [2019-10-13 21:16:34,958 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_rjh__wrappee__Base [2019-10-13 21:16:34,959 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_rjh [2019-10-13 21:16:34,959 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_chuck__wrappee__Base [2019-10-13 21:16:34,959 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_chuck [2019-10-13 21:16:34,959 INFO L138 BoogieDeclarations]: Found implementation of procedure bobToRjh [2019-10-13 21:16:34,959 INFO L138 BoogieDeclarations]: Found implementation of procedure rjhToBob [2019-10-13 21:16:34,959 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-13 21:16:34,960 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:16:34,960 INFO L138 BoogieDeclarations]: Found implementation of procedure bobKeyAdd [2019-10-13 21:16:34,960 INFO L138 BoogieDeclarations]: Found implementation of procedure rjhKeyAdd [2019-10-13 21:16:34,960 INFO L138 BoogieDeclarations]: Found implementation of procedure rjhKeyAddChuck [2019-10-13 21:16:34,960 INFO L138 BoogieDeclarations]: Found implementation of procedure bobKeyAddChuck [2019-10-13 21:16:34,960 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckKeyAdd [2019-10-13 21:16:34,960 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckKeyAddRjh [2019-10-13 21:16:34,961 INFO L138 BoogieDeclarations]: Found implementation of procedure rjhDeletePrivateKey [2019-10-13 21:16:34,961 INFO L138 BoogieDeclarations]: Found implementation of procedure bobKeyChange [2019-10-13 21:16:34,961 INFO L138 BoogieDeclarations]: Found implementation of procedure rjhKeyChange [2019-10-13 21:16:34,961 INFO L138 BoogieDeclarations]: Found implementation of procedure rjhSetAutoRespond [2019-10-13 21:16:34,961 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-13 21:16:34,961 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-13 21:16:34,962 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-13 21:16:34,962 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-13 21:16:34,962 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-13 21:16:34,962 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-13 21:16:34,962 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__SignForward_spec__1 [2019-10-13 21:16:34,962 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-13 21:16:34,963 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-13 21:16:34,963 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:16:34,963 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:16:34,963 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-13 21:16:34,964 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-13 21:16:34,964 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-13 21:16:34,965 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-13 21:16:34,965 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-13 21:16:34,965 INFO L130 BoogieDeclarations]: Found specification of procedure prompt [2019-10-13 21:16:34,966 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 21:16:34,967 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2019-10-13 21:16:34,967 INFO L130 BoogieDeclarations]: Found specification of procedure initClient [2019-10-13 21:16:34,967 INFO L130 BoogieDeclarations]: Found specification of procedure getClientAutoResponse [2019-10-13 21:16:34,967 INFO L130 BoogieDeclarations]: Found specification of procedure getClientPrivateKey [2019-10-13 21:16:34,967 INFO L130 BoogieDeclarations]: Found specification of procedure setClientPrivateKey [2019-10-13 21:16:34,968 INFO L130 BoogieDeclarations]: Found specification of procedure getClientId [2019-10-13 21:16:34,968 INFO L130 BoogieDeclarations]: Found specification of procedure findPublicKey [2019-10-13 21:16:34,968 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailFrom [2019-10-13 21:16:34,969 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailFrom [2019-10-13 21:16:34,969 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailTo [2019-10-13 21:16:34,969 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailTo [2019-10-13 21:16:34,970 INFO L130 BoogieDeclarations]: Found specification of procedure isEncrypted [2019-10-13 21:16:34,970 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailIsEncrypted [2019-10-13 21:16:34,974 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailEncryptionKey [2019-10-13 21:16:34,974 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailEncryptionKey [2019-10-13 21:16:34,974 INFO L130 BoogieDeclarations]: Found specification of procedure isSigned [2019-10-13 21:16:34,975 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailIsSigned [2019-10-13 21:16:34,975 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailSignKey [2019-10-13 21:16:34,976 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailSignKey [2019-10-13 21:16:34,976 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailIsSignatureVerified [2019-10-13 21:16:34,985 INFO L130 BoogieDeclarations]: Found specification of procedure isReadable [2019-10-13 21:16:34,985 INFO L130 BoogieDeclarations]: Found specification of procedure createEmail [2019-10-13 21:16:34,985 INFO L130 BoogieDeclarations]: Found specification of procedure queue [2019-10-13 21:16:34,985 INFO L130 BoogieDeclarations]: Found specification of procedure is_queue_empty [2019-10-13 21:16:34,986 INFO L130 BoogieDeclarations]: Found specification of procedure get_queued_client [2019-10-13 21:16:34,986 INFO L130 BoogieDeclarations]: Found specification of procedure get_queued_email [2019-10-13 21:16:34,986 INFO L130 BoogieDeclarations]: Found specification of procedure mail [2019-10-13 21:16:34,987 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing [2019-10-13 21:16:34,987 INFO L130 BoogieDeclarations]: Found specification of procedure deliver [2019-10-13 21:16:34,987 INFO L130 BoogieDeclarations]: Found specification of procedure incoming [2019-10-13 21:16:34,988 INFO L130 BoogieDeclarations]: Found specification of procedure createClient [2019-10-13 21:16:34,988 INFO L130 BoogieDeclarations]: Found specification of procedure sendEmail [2019-10-13 21:16:34,988 INFO L130 BoogieDeclarations]: Found specification of procedure isKeyPairValid [2019-10-13 21:16:34,988 INFO L130 BoogieDeclarations]: Found specification of procedure generateKeyPair [2019-10-13 21:16:34,988 INFO L130 BoogieDeclarations]: Found specification of procedure autoRespond [2019-10-13 21:16:34,988 INFO L130 BoogieDeclarations]: Found specification of procedure sign [2019-10-13 21:16:34,989 INFO L130 BoogieDeclarations]: Found specification of procedure verify [2019-10-13 21:16:34,989 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__SignForward_spec__1 [2019-10-13 21:16:34,989 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing__wrappee__Keys [2019-10-13 21:16:34,989 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing__wrappee__AutoResponder [2019-10-13 21:16:34,990 INFO L130 BoogieDeclarations]: Found specification of procedure incoming__wrappee__Encrypt [2019-10-13 21:16:34,990 INFO L130 BoogieDeclarations]: Found specification of procedure incoming__wrappee__Sign [2019-10-13 21:16:34,990 INFO L130 BoogieDeclarations]: Found specification of procedure incoming__wrappee__Verify [2019-10-13 21:16:34,990 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailId [2019-10-13 21:16:34,990 INFO L130 BoogieDeclarations]: Found specification of procedure isVerified [2019-10-13 21:16:34,990 INFO L130 BoogieDeclarations]: Found specification of procedure printMail [2019-10-13 21:16:34,991 INFO L130 BoogieDeclarations]: Found specification of procedure cloneEmail [2019-10-13 21:16:34,991 INFO L130 BoogieDeclarations]: Found specification of procedure printMail__wrappee__Keys [2019-10-13 21:16:34,991 INFO L130 BoogieDeclarations]: Found specification of procedure printMail__wrappee__AutoResponder [2019-10-13 21:16:34,991 INFO L130 BoogieDeclarations]: Found specification of procedure printMail__wrappee__Sign [2019-10-13 21:16:34,991 INFO L130 BoogieDeclarations]: Found specification of procedure isReadable__wrappee__Keys [2019-10-13 21:16:34,991 INFO L130 BoogieDeclarations]: Found specification of procedure getClientName [2019-10-13 21:16:34,991 INFO L130 BoogieDeclarations]: Found specification of procedure setClientName [2019-10-13 21:16:34,992 INFO L130 BoogieDeclarations]: Found specification of procedure getClientOutbuffer [2019-10-13 21:16:34,992 INFO L130 BoogieDeclarations]: Found specification of procedure setClientOutbuffer [2019-10-13 21:16:34,992 INFO L130 BoogieDeclarations]: Found specification of procedure getClientAddressBookSize [2019-10-13 21:16:34,992 INFO L130 BoogieDeclarations]: Found specification of procedure setClientAddressBookSize [2019-10-13 21:16:34,992 INFO L130 BoogieDeclarations]: Found specification of procedure createClientAddressBookEntry [2019-10-13 21:16:34,992 INFO L130 BoogieDeclarations]: Found specification of procedure getClientAddressBookAlias [2019-10-13 21:16:34,993 INFO L130 BoogieDeclarations]: Found specification of procedure setClientAddressBookAlias [2019-10-13 21:16:34,993 INFO L130 BoogieDeclarations]: Found specification of procedure getClientAddressBookAddress [2019-10-13 21:16:34,993 INFO L130 BoogieDeclarations]: Found specification of procedure setClientAddressBookAddress [2019-10-13 21:16:34,993 INFO L130 BoogieDeclarations]: Found specification of procedure setClientAutoResponse [2019-10-13 21:16:34,993 INFO L130 BoogieDeclarations]: Found specification of procedure getClientKeyringSize [2019-10-13 21:16:34,993 INFO L130 BoogieDeclarations]: Found specification of procedure createClientKeyringEntry [2019-10-13 21:16:34,993 INFO L130 BoogieDeclarations]: Found specification of procedure getClientKeyringUser [2019-10-13 21:16:34,994 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringUser [2019-10-13 21:16:34,994 INFO L130 BoogieDeclarations]: Found specification of procedure getClientKeyringPublicKey [2019-10-13 21:16:34,995 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringPublicKey [2019-10-13 21:16:34,995 INFO L130 BoogieDeclarations]: Found specification of procedure getClientForwardReceiver [2019-10-13 21:16:34,995 INFO L130 BoogieDeclarations]: Found specification of procedure setClientForwardReceiver [2019-10-13 21:16:34,995 INFO L130 BoogieDeclarations]: Found specification of procedure setClientId [2019-10-13 21:16:34,995 INFO L130 BoogieDeclarations]: Found specification of procedure findClientAddressBookAlias [2019-10-13 21:16:34,995 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringSize [2019-10-13 21:16:34,996 INFO L130 BoogieDeclarations]: Found specification of procedure initEmail [2019-10-13 21:16:34,996 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailId [2019-10-13 21:16:34,996 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailSubject [2019-10-13 21:16:34,996 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailSubject [2019-10-13 21:16:34,996 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailBody [2019-10-13 21:16:34,996 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailBody [2019-10-13 21:16:34,997 INFO L130 BoogieDeclarations]: Found specification of procedure setup_bob [2019-10-13 21:16:34,997 INFO L130 BoogieDeclarations]: Found specification of procedure setup_rjh [2019-10-13 21:16:34,997 INFO L130 BoogieDeclarations]: Found specification of procedure setup_chuck [2019-10-13 21:16:34,997 INFO L130 BoogieDeclarations]: Found specification of procedure bobToRjh [2019-10-13 21:16:34,997 INFO L130 BoogieDeclarations]: Found specification of procedure rjhToBob [2019-10-13 21:16:34,997 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-13 21:16:34,997 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-13 21:16:34,998 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:16:34,998 INFO L130 BoogieDeclarations]: Found specification of procedure bobKeyAdd [2019-10-13 21:16:34,998 INFO L130 BoogieDeclarations]: Found specification of procedure bobKeyAddChuck [2019-10-13 21:16:34,998 INFO L130 BoogieDeclarations]: Found specification of procedure rjhKeyAdd [2019-10-13 21:16:34,998 INFO L130 BoogieDeclarations]: Found specification of procedure rjhKeyAddChuck [2019-10-13 21:16:34,998 INFO L130 BoogieDeclarations]: Found specification of procedure chuckKeyAdd [2019-10-13 21:16:34,999 INFO L130 BoogieDeclarations]: Found specification of procedure bobKeyChange [2019-10-13 21:16:34,999 INFO L130 BoogieDeclarations]: Found specification of procedure rjhKeyChange [2019-10-13 21:16:34,999 INFO L130 BoogieDeclarations]: Found specification of procedure rjhDeletePrivateKey [2019-10-13 21:16:34,999 INFO L130 BoogieDeclarations]: Found specification of procedure chuckKeyAddRjh [2019-10-13 21:16:34,999 INFO L130 BoogieDeclarations]: Found specification of procedure rjhSetAutoRespond [2019-10-13 21:16:34,999 INFO L130 BoogieDeclarations]: Found specification of procedure setup_bob__wrappee__Base [2019-10-13 21:16:34,999 INFO L130 BoogieDeclarations]: Found specification of procedure setup_rjh__wrappee__Base [2019-10-13 21:16:35,000 INFO L130 BoogieDeclarations]: Found specification of procedure setup_chuck__wrappee__Base [2019-10-13 21:16:35,000 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-13 21:16:35,000 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 21:16:35,000 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 21:16:35,000 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-13 21:16:35,001 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 21:16:35,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 21:16:35,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 21:16:35,001 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 21:16:35,001 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-13 21:16:35,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 21:16:35,001 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-13 21:16:35,002 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-13 21:16:35,002 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 21:16:35,002 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-13 21:16:35,002 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-13 21:16:35,002 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-13 21:16:35,003 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-13 21:16:35,003 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:16:35,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-13 21:16:35,003 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:16:37,332 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:16:37,332 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-13 21:16:37,335 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:16:37 BoogieIcfgContainer [2019-10-13 21:16:37,335 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:16:37,338 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:16:37,339 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:16:37,343 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:16:37,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:16:33" (1/3) ... [2019-10-13 21:16:37,345 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2010bf82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:16:37, skipping insertion in model container [2019-10-13 21:16:37,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:16:34" (2/3) ... [2019-10-13 21:16:37,345 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2010bf82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:16:37, skipping insertion in model container [2019-10-13 21:16:37,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:16:37" (3/3) ... [2019-10-13 21:16:37,347 INFO L109 eAbstractionObserver]: Analyzing ICFG email_spec4_product30.cil.c [2019-10-13 21:16:37,359 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:16:37,373 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:16:37,387 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:16:37,439 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:16:37,439 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:16:37,440 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:16:37,444 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:16:37,444 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:16:37,445 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:16:37,445 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:16:37,445 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:16:37,489 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states. [2019-10-13 21:16:37,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-10-13 21:16:37,520 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:16:37,522 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] [2019-10-13 21:16:37,524 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:16:37,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:16:37,531 INFO L82 PathProgramCache]: Analyzing trace with hash -400048036, now seen corresponding path program 1 times [2019-10-13 21:16:37,542 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:16:37,542 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412724077] [2019-10-13 21:16:37,542 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:16:37,543 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:16:37,543 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:16:37,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:16:38,305 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 21:16:38,307 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412724077] [2019-10-13 21:16:38,308 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:16:38,308 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-13 21:16:38,309 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041256912] [2019-10-13 21:16:38,318 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-13 21:16:38,320 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:16:38,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-13 21:16:38,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-13 21:16:38,341 INFO L87 Difference]: Start difference. First operand 544 states. Second operand 2 states. [2019-10-13 21:16:38,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:16:38,464 INFO L93 Difference]: Finished difference Result 774 states and 1022 transitions. [2019-10-13 21:16:38,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-13 21:16:38,466 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 164 [2019-10-13 21:16:38,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:16:38,513 INFO L225 Difference]: With dead ends: 774 [2019-10-13 21:16:38,513 INFO L226 Difference]: Without dead ends: 493 [2019-10-13 21:16:38,525 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 21:16:38,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2019-10-13 21:16:38,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 493. [2019-10-13 21:16:38,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 493 states. [2019-10-13 21:16:38,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 655 transitions. [2019-10-13 21:16:38,640 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 655 transitions. Word has length 164 [2019-10-13 21:16:38,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:16:38,642 INFO L462 AbstractCegarLoop]: Abstraction has 493 states and 655 transitions. [2019-10-13 21:16:38,643 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-13 21:16:38,643 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 655 transitions. [2019-10-13 21:16:38,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-10-13 21:16:38,654 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:16:38,657 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] [2019-10-13 21:16:38,657 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:16:38,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:16:38,658 INFO L82 PathProgramCache]: Analyzing trace with hash -714771440, now seen corresponding path program 1 times [2019-10-13 21:16:38,658 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:16:38,659 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349559864] [2019-10-13 21:16:38,659 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:16:38,659 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:16:38,659 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:16:38,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:16:38,935 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 21:16:38,936 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349559864] [2019-10-13 21:16:38,936 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:16:38,936 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 21:16:38,937 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11316881] [2019-10-13 21:16:38,946 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 21:16:38,947 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:16:38,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 21:16:38,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:16:38,948 INFO L87 Difference]: Start difference. First operand 493 states and 655 transitions. Second operand 3 states. [2019-10-13 21:16:39,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:16:39,031 INFO L93 Difference]: Finished difference Result 757 states and 990 transitions. [2019-10-13 21:16:39,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 21:16:39,032 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 165 [2019-10-13 21:16:39,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:16:39,039 INFO L225 Difference]: With dead ends: 757 [2019-10-13 21:16:39,040 INFO L226 Difference]: Without dead ends: 496 [2019-10-13 21:16:39,043 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 21:16:39,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2019-10-13 21:16:39,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 495. [2019-10-13 21:16:39,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 495 states. [2019-10-13 21:16:39,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 657 transitions. [2019-10-13 21:16:39,096 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 657 transitions. Word has length 165 [2019-10-13 21:16:39,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:16:39,097 INFO L462 AbstractCegarLoop]: Abstraction has 495 states and 657 transitions. [2019-10-13 21:16:39,097 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 21:16:39,097 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 657 transitions. [2019-10-13 21:16:39,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-10-13 21:16:39,106 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:16:39,107 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 21:16:39,107 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:16:39,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:16:39,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1858618400, now seen corresponding path program 1 times [2019-10-13 21:16:39,108 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:16:39,108 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586075355] [2019-10-13 21:16:39,108 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:16:39,108 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:16:39,109 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:16:39,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:16:39,366 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 21:16:39,367 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586075355] [2019-10-13 21:16:39,367 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:16:39,367 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 21:16:39,368 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188970805] [2019-10-13 21:16:39,369 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 21:16:39,371 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:16:39,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 21:16:39,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:16:39,372 INFO L87 Difference]: Start difference. First operand 495 states and 657 transitions. Second operand 3 states. [2019-10-13 21:16:39,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:16:39,417 INFO L93 Difference]: Finished difference Result 966 states and 1312 transitions. [2019-10-13 21:16:39,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 21:16:39,418 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 175 [2019-10-13 21:16:39,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:16:39,431 INFO L225 Difference]: With dead ends: 966 [2019-10-13 21:16:39,431 INFO L226 Difference]: Without dead ends: 536 [2019-10-13 21:16:39,435 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 21:16:39,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2019-10-13 21:16:39,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 535. [2019-10-13 21:16:39,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 535 states. [2019-10-13 21:16:39,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 726 transitions. [2019-10-13 21:16:39,497 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 726 transitions. Word has length 175 [2019-10-13 21:16:39,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:16:39,498 INFO L462 AbstractCegarLoop]: Abstraction has 535 states and 726 transitions. [2019-10-13 21:16:39,498 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 21:16:39,498 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 726 transitions. [2019-10-13 21:16:39,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2019-10-13 21:16:39,510 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:16:39,511 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] [2019-10-13 21:16:39,511 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:16:39,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:16:39,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1912264946, now seen corresponding path program 1 times [2019-10-13 21:16:39,512 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:16:39,512 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542581331] [2019-10-13 21:16:39,513 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:16:39,513 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:16:39,513 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:16:39,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:16:39,781 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 21:16:39,785 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542581331] [2019-10-13 21:16:39,785 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:16:39,786 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 21:16:39,786 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595132502] [2019-10-13 21:16:39,787 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 21:16:39,787 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:16:39,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 21:16:39,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:16:39,788 INFO L87 Difference]: Start difference. First operand 535 states and 726 transitions. Second operand 3 states. [2019-10-13 21:16:39,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:16:39,842 INFO L93 Difference]: Finished difference Result 1083 states and 1514 transitions. [2019-10-13 21:16:39,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 21:16:39,843 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 176 [2019-10-13 21:16:39,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:16:39,850 INFO L225 Difference]: With dead ends: 1083 [2019-10-13 21:16:39,850 INFO L226 Difference]: Without dead ends: 613 [2019-10-13 21:16:39,853 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 21:16:39,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2019-10-13 21:16:39,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 612. [2019-10-13 21:16:39,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 612 states. [2019-10-13 21:16:39,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 858 transitions. [2019-10-13 21:16:39,903 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 858 transitions. Word has length 176 [2019-10-13 21:16:39,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:16:39,905 INFO L462 AbstractCegarLoop]: Abstraction has 612 states and 858 transitions. [2019-10-13 21:16:39,905 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 21:16:39,905 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 858 transitions. [2019-10-13 21:16:39,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-10-13 21:16:39,913 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:16:39,913 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] [2019-10-13 21:16:39,914 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:16:39,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:16:39,914 INFO L82 PathProgramCache]: Analyzing trace with hash -440539328, now seen corresponding path program 1 times [2019-10-13 21:16:39,915 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:16:39,916 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357565693] [2019-10-13 21:16:39,916 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:16:39,916 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:16:39,916 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:16:40,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:16:40,201 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 21:16:40,202 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357565693] [2019-10-13 21:16:40,202 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:16:40,202 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 21:16:40,203 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909681672] [2019-10-13 21:16:40,203 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 21:16:40,203 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:16:40,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 21:16:40,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:16:40,205 INFO L87 Difference]: Start difference. First operand 612 states and 858 transitions. Second operand 3 states. [2019-10-13 21:16:40,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:16:40,247 INFO L93 Difference]: Finished difference Result 1308 states and 1900 transitions. [2019-10-13 21:16:40,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 21:16:40,247 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 177 [2019-10-13 21:16:40,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:16:40,254 INFO L225 Difference]: With dead ends: 1308 [2019-10-13 21:16:40,254 INFO L226 Difference]: Without dead ends: 761 [2019-10-13 21:16:40,256 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 21:16:40,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2019-10-13 21:16:40,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 760. [2019-10-13 21:16:40,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 760 states. [2019-10-13 21:16:40,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 1110 transitions. [2019-10-13 21:16:40,297 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 1110 transitions. Word has length 177 [2019-10-13 21:16:40,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:16:40,298 INFO L462 AbstractCegarLoop]: Abstraction has 760 states and 1110 transitions. [2019-10-13 21:16:40,298 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 21:16:40,298 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 1110 transitions. [2019-10-13 21:16:40,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-10-13 21:16:40,303 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:16:40,303 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] [2019-10-13 21:16:40,303 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:16:40,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:16:40,304 INFO L82 PathProgramCache]: Analyzing trace with hash 256193454, now seen corresponding path program 1 times [2019-10-13 21:16:40,304 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:16:40,304 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316675513] [2019-10-13 21:16:40,305 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:16:40,305 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:16:40,305 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:16:40,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:16:40,457 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 21:16:40,457 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316675513] [2019-10-13 21:16:40,458 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:16:40,458 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 21:16:40,459 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005987122] [2019-10-13 21:16:40,459 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 21:16:40,460 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:16:40,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 21:16:40,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:16:40,460 INFO L87 Difference]: Start difference. First operand 760 states and 1110 transitions. Second operand 3 states. [2019-10-13 21:16:40,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:16:40,514 INFO L93 Difference]: Finished difference Result 1740 states and 2636 transitions. [2019-10-13 21:16:40,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 21:16:40,515 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 178 [2019-10-13 21:16:40,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:16:40,523 INFO L225 Difference]: With dead ends: 1740 [2019-10-13 21:16:40,523 INFO L226 Difference]: Without dead ends: 1045 [2019-10-13 21:16:40,526 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 21:16:40,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1045 states. [2019-10-13 21:16:40,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1045 to 1044. [2019-10-13 21:16:40,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1044 states. [2019-10-13 21:16:40,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1044 states to 1044 states and 1590 transitions. [2019-10-13 21:16:40,580 INFO L78 Accepts]: Start accepts. Automaton has 1044 states and 1590 transitions. Word has length 178 [2019-10-13 21:16:40,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:16:40,582 INFO L462 AbstractCegarLoop]: Abstraction has 1044 states and 1590 transitions. [2019-10-13 21:16:40,582 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 21:16:40,582 INFO L276 IsEmpty]: Start isEmpty. Operand 1044 states and 1590 transitions. [2019-10-13 21:16:40,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2019-10-13 21:16:40,588 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:16:40,588 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, 1] [2019-10-13 21:16:40,588 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:16:40,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:16:40,589 INFO L82 PathProgramCache]: Analyzing trace with hash 177792546, now seen corresponding path program 1 times [2019-10-13 21:16:40,589 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:16:40,589 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551893347] [2019-10-13 21:16:40,590 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:16:40,590 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:16:40,590 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:16:40,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:16:40,884 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 21:16:40,884 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551893347] [2019-10-13 21:16:40,885 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:16:40,885 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 21:16:40,885 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749568243] [2019-10-13 21:16:40,886 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:16:40,886 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:16:40,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:16:40,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:16:40,887 INFO L87 Difference]: Start difference. First operand 1044 states and 1590 transitions. Second operand 7 states. [2019-10-13 21:16:44,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:16:44,028 INFO L93 Difference]: Finished difference Result 1558 states and 2250 transitions. [2019-10-13 21:16:44,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 21:16:44,030 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 181 [2019-10-13 21:16:44,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:16:44,039 INFO L225 Difference]: With dead ends: 1558 [2019-10-13 21:16:44,040 INFO L226 Difference]: Without dead ends: 1308 [2019-10-13 21:16:44,042 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 21:16:44,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2019-10-13 21:16:44,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 1299. [2019-10-13 21:16:44,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1299 states. [2019-10-13 21:16:44,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 1918 transitions. [2019-10-13 21:16:44,130 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 1918 transitions. Word has length 181 [2019-10-13 21:16:44,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:16:44,130 INFO L462 AbstractCegarLoop]: Abstraction has 1299 states and 1918 transitions. [2019-10-13 21:16:44,130 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:16:44,131 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 1918 transitions. [2019-10-13 21:16:44,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2019-10-13 21:16:44,136 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:16:44,137 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, 1, 1] [2019-10-13 21:16:44,137 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:16:44,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:16:44,137 INFO L82 PathProgramCache]: Analyzing trace with hash 2019935353, now seen corresponding path program 1 times [2019-10-13 21:16:44,138 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:16:44,138 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829778334] [2019-10-13 21:16:44,138 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:16:44,138 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:16:44,138 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:16:44,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:16:44,475 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 21:16:44,476 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829778334] [2019-10-13 21:16:44,476 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:16:44,476 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2019-10-13 21:16:44,477 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669814841] [2019-10-13 21:16:44,477 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-13 21:16:44,477 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:16:44,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-13 21:16:44,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2019-10-13 21:16:44,479 INFO L87 Difference]: Start difference. First operand 1299 states and 1918 transitions. Second operand 18 states. [2019-10-13 21:16:44,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:16:44,946 INFO L93 Difference]: Finished difference Result 1882 states and 2678 transitions. [2019-10-13 21:16:44,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-13 21:16:44,947 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 182 [2019-10-13 21:16:44,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:16:44,956 INFO L225 Difference]: With dead ends: 1882 [2019-10-13 21:16:44,956 INFO L226 Difference]: Without dead ends: 1349 [2019-10-13 21:16:44,960 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2019-10-13 21:16:44,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1349 states. [2019-10-13 21:16:45,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1349 to 1345. [2019-10-13 21:16:45,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1345 states. [2019-10-13 21:16:45,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 1981 transitions. [2019-10-13 21:16:45,029 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 1981 transitions. Word has length 182 [2019-10-13 21:16:45,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:16:45,030 INFO L462 AbstractCegarLoop]: Abstraction has 1345 states and 1981 transitions. [2019-10-13 21:16:45,030 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-13 21:16:45,030 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 1981 transitions. [2019-10-13 21:16:45,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2019-10-13 21:16:45,036 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:16:45,037 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:16:45,037 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:16:45,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:16:45,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1115271463, now seen corresponding path program 1 times [2019-10-13 21:16:45,038 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:16:45,038 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606797801] [2019-10-13 21:16:45,038 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:16:45,038 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:16:45,038 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:16:45,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:16:45,267 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 21:16:45,268 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606797801] [2019-10-13 21:16:45,268 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:16:45,269 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 21:16:45,269 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392984309] [2019-10-13 21:16:45,269 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 21:16:45,270 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:16:45,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 21:16:45,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:16:45,270 INFO L87 Difference]: Start difference. First operand 1345 states and 1981 transitions. Second operand 8 states. [2019-10-13 21:16:46,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:16:46,203 INFO L93 Difference]: Finished difference Result 2088 states and 2959 transitions. [2019-10-13 21:16:46,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 21:16:46,203 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 191 [2019-10-13 21:16:46,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:16:46,218 INFO L225 Difference]: With dead ends: 2088 [2019-10-13 21:16:46,218 INFO L226 Difference]: Without dead ends: 1929 [2019-10-13 21:16:46,221 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 21:16:46,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1929 states. [2019-10-13 21:16:46,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1929 to 1916. [2019-10-13 21:16:46,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1916 states. [2019-10-13 21:16:46,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1916 states to 1916 states and 2733 transitions. [2019-10-13 21:16:46,332 INFO L78 Accepts]: Start accepts. Automaton has 1916 states and 2733 transitions. Word has length 191 [2019-10-13 21:16:46,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:16:46,333 INFO L462 AbstractCegarLoop]: Abstraction has 1916 states and 2733 transitions. [2019-10-13 21:16:46,333 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 21:16:46,333 INFO L276 IsEmpty]: Start isEmpty. Operand 1916 states and 2733 transitions. [2019-10-13 21:16:46,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2019-10-13 21:16:46,341 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:16:46,341 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:16:46,341 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:16:46,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:16:46,342 INFO L82 PathProgramCache]: Analyzing trace with hash 839491174, now seen corresponding path program 1 times [2019-10-13 21:16:46,342 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:16:46,343 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890360170] [2019-10-13 21:16:46,343 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:16:46,343 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:16:46,343 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:16:46,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:16:46,683 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 21:16:46,683 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890360170] [2019-10-13 21:16:46,684 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:16:46,684 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2019-10-13 21:16:46,684 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110840879] [2019-10-13 21:16:46,685 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-13 21:16:46,685 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:16:46,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-13 21:16:46,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2019-10-13 21:16:46,686 INFO L87 Difference]: Start difference. First operand 1916 states and 2733 transitions. Second operand 17 states. [2019-10-13 21:16:47,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:16:47,421 INFO L93 Difference]: Finished difference Result 2439 states and 3404 transitions. [2019-10-13 21:16:47,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-13 21:16:47,421 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 192 [2019-10-13 21:16:47,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:16:47,433 INFO L225 Difference]: With dead ends: 2439 [2019-10-13 21:16:47,433 INFO L226 Difference]: Without dead ends: 1915 [2019-10-13 21:16:47,436 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2019-10-13 21:16:47,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1915 states. [2019-10-13 21:16:47,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1915 to 1914. [2019-10-13 21:16:47,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1914 states. [2019-10-13 21:16:47,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1914 states to 1914 states and 2728 transitions. [2019-10-13 21:16:47,526 INFO L78 Accepts]: Start accepts. Automaton has 1914 states and 2728 transitions. Word has length 192 [2019-10-13 21:16:47,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:16:47,526 INFO L462 AbstractCegarLoop]: Abstraction has 1914 states and 2728 transitions. [2019-10-13 21:16:47,527 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-13 21:16:47,527 INFO L276 IsEmpty]: Start isEmpty. Operand 1914 states and 2728 transitions. [2019-10-13 21:16:47,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2019-10-13 21:16:47,533 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:16:47,533 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:16:47,534 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:16:47,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:16:47,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1058572502, now seen corresponding path program 2 times [2019-10-13 21:16:47,534 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:16:47,535 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376543046] [2019-10-13 21:16:47,535 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:16:47,535 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:16:47,535 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:16:47,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:16:47,733 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 21:16:47,734 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376543046] [2019-10-13 21:16:47,734 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046444657] [2019-10-13 21:16:47,734 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 21:16:48,200 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2019-10-13 21:16:48,200 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 21:16:48,211 INFO L256 TraceCheckSpWp]: Trace formula consists of 2032 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-13 21:16:48,230 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:16:48,478 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 21:16:48,479 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:16:49,072 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 21:16:49,073 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:16:49,073 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [11] total 23 [2019-10-13 21:16:49,073 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818293837] [2019-10-13 21:16:49,074 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 21:16:49,075 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:16:49,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 21:16:49,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2019-10-13 21:16:49,076 INFO L87 Difference]: Start difference. First operand 1914 states and 2728 transitions. Second operand 14 states. [2019-10-13 21:16:51,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:16:51,121 INFO L93 Difference]: Finished difference Result 5694 states and 8227 transitions. [2019-10-13 21:16:51,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-13 21:16:51,122 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 192 [2019-10-13 21:16:51,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:16:51,159 INFO L225 Difference]: With dead ends: 5694 [2019-10-13 21:16:51,159 INFO L226 Difference]: Without dead ends: 5687 [2019-10-13 21:16:51,165 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 378 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 21:16:51,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5687 states. [2019-10-13 21:16:51,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5687 to 4542. [2019-10-13 21:16:51,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4542 states. [2019-10-13 21:16:51,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4542 states to 4542 states and 6736 transitions. [2019-10-13 21:16:51,453 INFO L78 Accepts]: Start accepts. Automaton has 4542 states and 6736 transitions. Word has length 192 [2019-10-13 21:16:51,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:16:51,454 INFO L462 AbstractCegarLoop]: Abstraction has 4542 states and 6736 transitions. [2019-10-13 21:16:51,454 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 21:16:51,454 INFO L276 IsEmpty]: Start isEmpty. Operand 4542 states and 6736 transitions. [2019-10-13 21:16:51,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2019-10-13 21:16:51,479 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:16:51,480 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:16:51,687 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:16:51,688 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:16:51,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:16:51,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1305984047, now seen corresponding path program 1 times [2019-10-13 21:16:51,689 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:16:51,689 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108846852] [2019-10-13 21:16:51,690 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:16:51,690 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:16:51,690 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:16:51,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:16:51,976 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 21:16:51,976 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108846852] [2019-10-13 21:16:51,977 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305764759] [2019-10-13 21:16:51,977 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 21:16:52,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:16:52,793 INFO L256 TraceCheckSpWp]: Trace formula consists of 2729 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 21:16:52,815 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:16:53,110 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 21:16:53,111 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:16:53,564 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:16:53,639 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 21:16:53,706 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 21:16:53,808 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 21:16:53,808 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:16:53,808 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11, 9] total 24 [2019-10-13 21:16:53,809 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585379298] [2019-10-13 21:16:53,809 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 21:16:53,810 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:16:53,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 21:16:53,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2019-10-13 21:16:53,810 INFO L87 Difference]: Start difference. First operand 4542 states and 6736 transitions. Second operand 9 states. [2019-10-13 21:16:55,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:16:55,158 INFO L93 Difference]: Finished difference Result 9058 states and 13446 transitions. [2019-10-13 21:16:55,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 21:16:55,159 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 194 [2019-10-13 21:16:55,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:16:55,188 INFO L225 Difference]: With dead ends: 9058 [2019-10-13 21:16:55,188 INFO L226 Difference]: Without dead ends: 4560 [2019-10-13 21:16:55,206 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 372 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 21:16:55,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4560 states. [2019-10-13 21:16:55,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4560 to 4560. [2019-10-13 21:16:55,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4560 states. [2019-10-13 21:16:55,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4560 states to 4560 states and 6757 transitions. [2019-10-13 21:16:55,599 INFO L78 Accepts]: Start accepts. Automaton has 4560 states and 6757 transitions. Word has length 194 [2019-10-13 21:16:55,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:16:55,599 INFO L462 AbstractCegarLoop]: Abstraction has 4560 states and 6757 transitions. [2019-10-13 21:16:55,600 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 21:16:55,600 INFO L276 IsEmpty]: Start isEmpty. Operand 4560 states and 6757 transitions. [2019-10-13 21:16:55,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2019-10-13 21:16:55,624 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:16:55,625 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:16:55,835 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:16:55,836 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:16:55,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:16:55,836 INFO L82 PathProgramCache]: Analyzing trace with hash -765804134, now seen corresponding path program 1 times [2019-10-13 21:16:55,837 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:16:55,837 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716383956] [2019-10-13 21:16:55,837 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:16:55,837 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:16:55,837 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:16:55,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:16:56,039 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 21:16:56,039 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716383956] [2019-10-13 21:16:56,040 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788770598] [2019-10-13 21:16:56,040 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 21:16:56,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:16:56,670 INFO L256 TraceCheckSpWp]: Trace formula consists of 2730 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 21:16:56,679 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:16:56,815 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 21:16:56,815 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:16:57,116 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 21:16:57,197 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 21:16:57,285 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 21:16:57,285 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:16:57,286 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11, 7] total 20 [2019-10-13 21:16:57,286 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38861564] [2019-10-13 21:16:57,292 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:16:57,292 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:16:57,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:16:57,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2019-10-13 21:16:57,294 INFO L87 Difference]: Start difference. First operand 4560 states and 6757 transitions. Second operand 7 states. [2019-10-13 21:16:58,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:16:58,467 INFO L93 Difference]: Finished difference Result 9028 states and 13411 transitions. [2019-10-13 21:16:58,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:16:58,467 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 195 [2019-10-13 21:16:58,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:16:58,494 INFO L225 Difference]: With dead ends: 9028 [2019-10-13 21:16:58,495 INFO L226 Difference]: Without dead ends: 4560 [2019-10-13 21:16:58,512 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 379 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2019-10-13 21:16:58,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4560 states. [2019-10-13 21:16:58,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4560 to 4560. [2019-10-13 21:16:58,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4560 states. [2019-10-13 21:16:58,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4560 states to 4560 states and 6735 transitions. [2019-10-13 21:16:58,716 INFO L78 Accepts]: Start accepts. Automaton has 4560 states and 6735 transitions. Word has length 195 [2019-10-13 21:16:58,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:16:58,717 INFO L462 AbstractCegarLoop]: Abstraction has 4560 states and 6735 transitions. [2019-10-13 21:16:58,717 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:16:58,717 INFO L276 IsEmpty]: Start isEmpty. Operand 4560 states and 6735 transitions. [2019-10-13 21:16:58,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2019-10-13 21:16:58,738 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:16:58,738 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:16:58,947 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:16:58,948 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:16:58,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:16:58,948 INFO L82 PathProgramCache]: Analyzing trace with hash 516423493, now seen corresponding path program 1 times [2019-10-13 21:16:58,948 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:16:58,949 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907026154] [2019-10-13 21:16:58,949 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:16:58,949 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:16:58,949 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:16:58,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:16:59,078 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 21:16:59,079 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907026154] [2019-10-13 21:16:59,079 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616632307] [2019-10-13 21:16:59,079 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 21:16:59,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:16:59,721 INFO L256 TraceCheckSpWp]: Trace formula consists of 2725 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 21:16:59,731 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:16:59,832 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 21:16:59,832 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:17:00,102 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 21:17:00,140 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 21:17:00,250 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 21:17:00,251 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:17:00,251 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 16 [2019-10-13 21:17:00,251 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264968240] [2019-10-13 21:17:00,252 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:17:00,252 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:17:00,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:17:00,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2019-10-13 21:17:00,253 INFO L87 Difference]: Start difference. First operand 4560 states and 6735 transitions. Second operand 7 states. [2019-10-13 21:17:01,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:17:01,645 INFO L93 Difference]: Finished difference Result 8329 states and 12164 transitions. [2019-10-13 21:17:01,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:17:01,645 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 196 [2019-10-13 21:17:01,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:17:01,672 INFO L225 Difference]: With dead ends: 8329 [2019-10-13 21:17:01,672 INFO L226 Difference]: Without dead ends: 4572 [2019-10-13 21:17:01,687 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 381 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2019-10-13 21:17:01,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4572 states. [2019-10-13 21:17:01,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4572 to 4560. [2019-10-13 21:17:01,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4560 states. [2019-10-13 21:17:01,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4560 states to 4560 states and 6733 transitions. [2019-10-13 21:17:01,892 INFO L78 Accepts]: Start accepts. Automaton has 4560 states and 6733 transitions. Word has length 196 [2019-10-13 21:17:01,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:17:01,892 INFO L462 AbstractCegarLoop]: Abstraction has 4560 states and 6733 transitions. [2019-10-13 21:17:01,892 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:17:01,892 INFO L276 IsEmpty]: Start isEmpty. Operand 4560 states and 6733 transitions. [2019-10-13 21:17:01,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2019-10-13 21:17:01,910 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:17:01,910 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:17:02,119 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:17:02,120 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:17:02,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:17:02,121 INFO L82 PathProgramCache]: Analyzing trace with hash -17378578, now seen corresponding path program 1 times [2019-10-13 21:17:02,121 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:17:02,121 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554292468] [2019-10-13 21:17:02,121 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:17:02,121 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:17:02,122 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:17:02,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:17:02,262 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 21:17:02,263 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554292468] [2019-10-13 21:17:02,263 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678807416] [2019-10-13 21:17:02,263 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 21:17:02,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:17:02,820 INFO L256 TraceCheckSpWp]: Trace formula consists of 2723 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 21:17:02,827 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:17:03,052 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 21:17:03,052 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:17:03,339 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:17:03,415 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 21:17:03,474 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 21:17:03,600 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 21:17:03,601 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:17:03,601 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [7] total 21 [2019-10-13 21:17:03,601 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542578251] [2019-10-13 21:17:03,602 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-13 21:17:03,602 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:17:03,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-13 21:17:03,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2019-10-13 21:17:03,603 INFO L87 Difference]: Start difference. First operand 4560 states and 6733 transitions. Second operand 16 states.