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 -i ../../../trunk/examples/svcomp/loops/n.c24.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 19:17:38,456 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 19:17:38,458 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 19:17:38,470 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 19:17:38,470 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 19:17:38,471 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 19:17:38,473 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 19:17:38,474 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 19:17:38,476 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 19:17:38,477 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 19:17:38,478 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 19:17:38,479 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 19:17:38,479 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 19:17:38,480 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 19:17:38,481 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 19:17:38,482 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 19:17:38,483 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 19:17:38,484 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 19:17:38,486 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 19:17:38,488 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 19:17:38,489 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 19:17:38,490 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 19:17:38,492 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 19:17:38,492 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 19:17:38,495 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 19:17:38,495 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 19:17:38,495 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 19:17:38,496 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 19:17:38,497 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 19:17:38,498 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 19:17:38,498 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 19:17:38,498 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 19:17:38,499 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 19:17:38,500 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 19:17:38,501 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 19:17:38,501 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 19:17:38,502 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 19:17:38,502 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 19:17:38,502 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 19:17:38,503 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 19:17:38,504 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 19:17:38,505 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 19:17:38,521 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 19:17:38,521 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 19:17:38,524 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 19:17:38,524 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 19:17:38,524 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 19:17:38,525 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 19:17:38,525 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 19:17:38,525 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 19:17:38,526 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 19:17:38,526 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 19:17:38,526 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 19:17:38,526 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 19:17:38,526 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 19:17:38,527 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 19:17:38,527 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 19:17:38,527 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 19:17:38,527 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 19:17:38,527 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 19:17:38,528 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 19:17:38,528 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 19:17:38,528 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 19:17:38,529 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 19:17:38,530 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 19:17:38,530 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 19:17:38,530 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 19:17:38,530 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 19:17:38,530 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 19:17:38,531 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 19:17:38,531 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 19:17:38,830 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 19:17:38,848 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 19:17:38,854 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 19:17:38,856 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 19:17:38,856 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 19:17:38,857 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/n.c24.i [2019-10-13 19:17:38,927 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce5576b3f/dfce99a086b04e409920b21c093f4044/FLAGccfdb44bf [2019-10-13 19:17:39,367 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 19:17:39,367 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/n.c24.i [2019-10-13 19:17:39,376 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce5576b3f/dfce99a086b04e409920b21c093f4044/FLAGccfdb44bf [2019-10-13 19:17:39,781 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce5576b3f/dfce99a086b04e409920b21c093f4044 [2019-10-13 19:17:39,791 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 19:17:39,792 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 19:17:39,793 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 19:17:39,794 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 19:17:39,797 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 19:17:39,798 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:17:39" (1/1) ... [2019-10-13 19:17:39,801 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d3bf562 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:39, skipping insertion in model container [2019-10-13 19:17:39,801 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:17:39" (1/1) ... [2019-10-13 19:17:39,809 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 19:17:39,835 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 19:17:40,125 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:17:40,224 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 19:17:40,255 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:17:40,286 INFO L192 MainTranslator]: Completed translation [2019-10-13 19:17:40,287 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:40 WrapperNode [2019-10-13 19:17:40,287 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 19:17:40,288 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 19:17:40,288 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 19:17:40,288 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 19:17:40,302 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:40" (1/1) ... [2019-10-13 19:17:40,302 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:40" (1/1) ... [2019-10-13 19:17:40,321 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:40" (1/1) ... [2019-10-13 19:17:40,323 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:40" (1/1) ... [2019-10-13 19:17:40,340 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:40" (1/1) ... [2019-10-13 19:17:40,346 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:40" (1/1) ... [2019-10-13 19:17:40,349 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:40" (1/1) ... [2019-10-13 19:17:40,353 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 19:17:40,354 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 19:17:40,354 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 19:17:40,354 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 19:17:40,355 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:40" (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 19:17:40,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 19:17:40,411 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 19:17:40,412 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 19:17:40,412 INFO L138 BoogieDeclarations]: Found implementation of procedure bar [2019-10-13 19:17:40,412 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2019-10-13 19:17:40,413 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 19:17:40,413 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memmove [2019-10-13 19:17:40,414 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 19:17:40,414 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 19:17:40,414 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2019-10-13 19:17:40,414 INFO L130 BoogieDeclarations]: Found specification of procedure memmove [2019-10-13 19:17:40,414 INFO L130 BoogieDeclarations]: Found specification of procedure memccpy [2019-10-13 19:17:40,415 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2019-10-13 19:17:40,415 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2019-10-13 19:17:40,416 INFO L130 BoogieDeclarations]: Found specification of procedure memchr [2019-10-13 19:17:40,416 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2019-10-13 19:17:40,417 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2019-10-13 19:17:40,418 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2019-10-13 19:17:40,418 INFO L130 BoogieDeclarations]: Found specification of procedure strncat [2019-10-13 19:17:40,418 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2019-10-13 19:17:40,418 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2019-10-13 19:17:40,419 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll [2019-10-13 19:17:40,419 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm [2019-10-13 19:17:40,419 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll_l [2019-10-13 19:17:40,419 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm_l [2019-10-13 19:17:40,420 INFO L130 BoogieDeclarations]: Found specification of procedure strdup [2019-10-13 19:17:40,420 INFO L130 BoogieDeclarations]: Found specification of procedure strndup [2019-10-13 19:17:40,420 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2019-10-13 19:17:40,421 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2019-10-13 19:17:40,421 INFO L130 BoogieDeclarations]: Found specification of procedure strcspn [2019-10-13 19:17:40,421 INFO L130 BoogieDeclarations]: Found specification of procedure strspn [2019-10-13 19:17:40,421 INFO L130 BoogieDeclarations]: Found specification of procedure strpbrk [2019-10-13 19:17:40,421 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2019-10-13 19:17:40,421 INFO L130 BoogieDeclarations]: Found specification of procedure strtok [2019-10-13 19:17:40,421 INFO L130 BoogieDeclarations]: Found specification of procedure __strtok_r [2019-10-13 19:17:40,421 INFO L130 BoogieDeclarations]: Found specification of procedure strtok_r [2019-10-13 19:17:40,421 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2019-10-13 19:17:40,422 INFO L130 BoogieDeclarations]: Found specification of procedure strnlen [2019-10-13 19:17:40,422 INFO L130 BoogieDeclarations]: Found specification of procedure strerror [2019-10-13 19:17:40,422 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_r [2019-10-13 19:17:40,422 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_l [2019-10-13 19:17:40,422 INFO L130 BoogieDeclarations]: Found specification of procedure __bzero [2019-10-13 19:17:40,422 INFO L130 BoogieDeclarations]: Found specification of procedure bcopy [2019-10-13 19:17:40,422 INFO L130 BoogieDeclarations]: Found specification of procedure bzero [2019-10-13 19:17:40,422 INFO L130 BoogieDeclarations]: Found specification of procedure bcmp [2019-10-13 19:17:40,423 INFO L130 BoogieDeclarations]: Found specification of procedure index [2019-10-13 19:17:40,423 INFO L130 BoogieDeclarations]: Found specification of procedure rindex [2019-10-13 19:17:40,423 INFO L130 BoogieDeclarations]: Found specification of procedure ffs [2019-10-13 19:17:40,423 INFO L130 BoogieDeclarations]: Found specification of procedure strcasecmp [2019-10-13 19:17:40,423 INFO L130 BoogieDeclarations]: Found specification of procedure strncasecmp [2019-10-13 19:17:40,423 INFO L130 BoogieDeclarations]: Found specification of procedure strsep [2019-10-13 19:17:40,423 INFO L130 BoogieDeclarations]: Found specification of procedure strsignal [2019-10-13 19:17:40,423 INFO L130 BoogieDeclarations]: Found specification of procedure __stpcpy [2019-10-13 19:17:40,423 INFO L130 BoogieDeclarations]: Found specification of procedure stpcpy [2019-10-13 19:17:40,424 INFO L130 BoogieDeclarations]: Found specification of procedure __stpncpy [2019-10-13 19:17:40,424 INFO L130 BoogieDeclarations]: Found specification of procedure stpncpy [2019-10-13 19:17:40,424 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 19:17:40,424 INFO L130 BoogieDeclarations]: Found specification of procedure bar [2019-10-13 19:17:40,424 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2019-10-13 19:17:40,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 19:17:40,424 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 19:17:40,424 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 19:17:40,424 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 19:17:40,424 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memmove [2019-10-13 19:17:40,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 19:17:40,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 19:17:40,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 19:17:40,425 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2019-10-13 19:17:40,425 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2019-10-13 19:17:40,961 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 19:17:40,962 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-13 19:17:40,963 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:17:40 BoogieIcfgContainer [2019-10-13 19:17:40,963 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 19:17:40,965 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 19:17:40,965 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 19:17:40,968 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 19:17:40,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:17:39" (1/3) ... [2019-10-13 19:17:40,969 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@236c5b3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:17:40, skipping insertion in model container [2019-10-13 19:17:40,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:40" (2/3) ... [2019-10-13 19:17:40,970 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@236c5b3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:17:40, skipping insertion in model container [2019-10-13 19:17:40,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:17:40" (3/3) ... [2019-10-13 19:17:40,972 INFO L109 eAbstractionObserver]: Analyzing ICFG n.c24.i [2019-10-13 19:17:40,983 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 19:17:40,992 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 19:17:41,004 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 19:17:41,031 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 19:17:41,032 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 19:17:41,032 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 19:17:41,032 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 19:17:41,032 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 19:17:41,032 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 19:17:41,033 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 19:17:41,033 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 19:17:41,049 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states. [2019-10-13 19:17:41,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-13 19:17:41,054 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:41,055 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:41,057 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:41,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:41,061 INFO L82 PathProgramCache]: Analyzing trace with hash -581213385, now seen corresponding path program 1 times [2019-10-13 19:17:41,068 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:41,068 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364141849] [2019-10-13 19:17:41,069 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:41,069 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:41,069 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:41,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:41,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:41,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:41,242 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364141849] [2019-10-13 19:17:41,243 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:17:41,243 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 19:17:41,244 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759950160] [2019-10-13 19:17:41,248 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 19:17:41,249 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:41,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 19:17:41,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:17:41,266 INFO L87 Difference]: Start difference. First operand 53 states. Second operand 4 states. [2019-10-13 19:17:41,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:41,524 INFO L93 Difference]: Finished difference Result 123 states and 177 transitions. [2019-10-13 19:17:41,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 19:17:41,526 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-10-13 19:17:41,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:41,537 INFO L225 Difference]: With dead ends: 123 [2019-10-13 19:17:41,538 INFO L226 Difference]: Without dead ends: 69 [2019-10-13 19:17:41,541 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:17:41,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-10-13 19:17:41,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 48. [2019-10-13 19:17:41,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-10-13 19:17:41,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2019-10-13 19:17:41,594 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 13 [2019-10-13 19:17:41,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:41,594 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2019-10-13 19:17:41,595 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 19:17:41,595 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2019-10-13 19:17:41,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-13 19:17:41,596 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:41,596 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:41,597 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:41,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:41,597 INFO L82 PathProgramCache]: Analyzing trace with hash -351648040, now seen corresponding path program 1 times [2019-10-13 19:17:41,597 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:41,598 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548185004] [2019-10-13 19:17:41,598 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:41,598 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:41,599 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:41,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:41,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:41,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 19:17:41,738 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548185004] [2019-10-13 19:17:41,739 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308739999] [2019-10-13 19:17:41,739 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 19:17:41,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:41,859 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 19:17:41,866 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:41,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 19:17:41,906 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:17:41,906 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-13 19:17:41,906 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952820141] [2019-10-13 19:17:41,908 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 19:17:41,909 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:41,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 19:17:41,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 19:17:41,909 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand 6 states. [2019-10-13 19:17:42,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:42,110 INFO L93 Difference]: Finished difference Result 131 states and 172 transitions. [2019-10-13 19:17:42,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 19:17:42,111 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2019-10-13 19:17:42,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:42,113 INFO L225 Difference]: With dead ends: 131 [2019-10-13 19:17:42,113 INFO L226 Difference]: Without dead ends: 92 [2019-10-13 19:17:42,114 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 19:17:42,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-10-13 19:17:42,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 71. [2019-10-13 19:17:42,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-10-13 19:17:42,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 91 transitions. [2019-10-13 19:17:42,129 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 91 transitions. Word has length 20 [2019-10-13 19:17:42,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:42,129 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 91 transitions. [2019-10-13 19:17:42,129 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 19:17:42,129 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 91 transitions. [2019-10-13 19:17:42,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-13 19:17:42,131 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:42,132 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:42,337 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:42,337 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:42,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:42,338 INFO L82 PathProgramCache]: Analyzing trace with hash 613250579, now seen corresponding path program 2 times [2019-10-13 19:17:42,339 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:42,339 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709819751] [2019-10-13 19:17:42,340 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:42,340 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:42,340 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:42,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:42,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:42,483 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-13 19:17:42,484 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709819751] [2019-10-13 19:17:42,485 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999882190] [2019-10-13 19:17:42,485 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 19:17:42,562 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 19:17:42,562 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:42,563 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 19:17:42,565 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:42,595 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-13 19:17:42,595 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:42,595 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2019-10-13 19:17:42,596 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687331648] [2019-10-13 19:17:42,596 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 19:17:42,596 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:42,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 19:17:42,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-10-13 19:17:42,597 INFO L87 Difference]: Start difference. First operand 71 states and 91 transitions. Second operand 5 states. [2019-10-13 19:17:42,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:42,637 INFO L93 Difference]: Finished difference Result 116 states and 156 transitions. [2019-10-13 19:17:42,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 19:17:42,638 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2019-10-13 19:17:42,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:42,640 INFO L225 Difference]: With dead ends: 116 [2019-10-13 19:17:42,640 INFO L226 Difference]: Without dead ends: 111 [2019-10-13 19:17:42,640 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-10-13 19:17:42,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-10-13 19:17:42,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 72. [2019-10-13 19:17:42,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-10-13 19:17:42,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 93 transitions. [2019-10-13 19:17:42,653 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 93 transitions. Word has length 27 [2019-10-13 19:17:42,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:42,653 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 93 transitions. [2019-10-13 19:17:42,654 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 19:17:42,654 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 93 transitions. [2019-10-13 19:17:42,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-13 19:17:42,655 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:42,656 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 19:17:42,859 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:42,859 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:42,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:42,860 INFO L82 PathProgramCache]: Analyzing trace with hash 423568487, now seen corresponding path program 1 times [2019-10-13 19:17:42,861 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:42,861 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653360106] [2019-10-13 19:17:42,861 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:42,862 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:42,862 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:42,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:42,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:42,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:42,966 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 19:17:42,967 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653360106] [2019-10-13 19:17:42,967 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030506778] [2019-10-13 19:17:42,967 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 19:17:43,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:43,056 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 19:17:43,059 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:43,081 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 19:17:43,081 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:17:43,082 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 8 [2019-10-13 19:17:43,082 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777326125] [2019-10-13 19:17:43,083 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 19:17:43,083 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:43,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 19:17:43,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-13 19:17:43,084 INFO L87 Difference]: Start difference. First operand 72 states and 93 transitions. Second operand 8 states. [2019-10-13 19:17:43,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:43,411 INFO L93 Difference]: Finished difference Result 188 states and 258 transitions. [2019-10-13 19:17:43,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 19:17:43,412 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2019-10-13 19:17:43,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:43,417 INFO L225 Difference]: With dead ends: 188 [2019-10-13 19:17:43,417 INFO L226 Difference]: Without dead ends: 127 [2019-10-13 19:17:43,421 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-10-13 19:17:43,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2019-10-13 19:17:43,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 95. [2019-10-13 19:17:43,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-10-13 19:17:43,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 126 transitions. [2019-10-13 19:17:43,449 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 126 transitions. Word has length 36 [2019-10-13 19:17:43,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:43,449 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 126 transitions. [2019-10-13 19:17:43,449 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 19:17:43,449 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 126 transitions. [2019-10-13 19:17:43,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-13 19:17:43,457 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:43,457 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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 19:17:43,665 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:43,666 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:43,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:43,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1884917406, now seen corresponding path program 2 times [2019-10-13 19:17:43,666 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:43,667 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355688010] [2019-10-13 19:17:43,667 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:43,667 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:43,667 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:43,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:43,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:43,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:43,779 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 19:17:43,779 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355688010] [2019-10-13 19:17:43,779 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268731533] [2019-10-13 19:17:43,779 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 19:17:43,854 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 19:17:43,855 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:43,856 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 19:17:43,858 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:43,874 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 19:17:43,874 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:17:43,874 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 9 [2019-10-13 19:17:43,875 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083674178] [2019-10-13 19:17:43,875 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 19:17:43,875 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:43,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 19:17:43,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 19:17:43,876 INFO L87 Difference]: Start difference. First operand 95 states and 126 transitions. Second operand 9 states. [2019-10-13 19:17:44,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:44,164 INFO L93 Difference]: Finished difference Result 232 states and 323 transitions. [2019-10-13 19:17:44,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 19:17:44,165 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 43 [2019-10-13 19:17:44,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:44,167 INFO L225 Difference]: With dead ends: 232 [2019-10-13 19:17:44,168 INFO L226 Difference]: Without dead ends: 150 [2019-10-13 19:17:44,169 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2019-10-13 19:17:44,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2019-10-13 19:17:44,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 118. [2019-10-13 19:17:44,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-10-13 19:17:44,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 159 transitions. [2019-10-13 19:17:44,186 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 159 transitions. Word has length 43 [2019-10-13 19:17:44,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:44,186 INFO L462 AbstractCegarLoop]: Abstraction has 118 states and 159 transitions. [2019-10-13 19:17:44,186 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 19:17:44,186 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 159 transitions. [2019-10-13 19:17:44,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-10-13 19:17:44,188 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:44,189 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 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 19:17:44,392 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:44,393 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:44,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:44,394 INFO L82 PathProgramCache]: Analyzing trace with hash 708097291, now seen corresponding path program 3 times [2019-10-13 19:17:44,394 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:44,395 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032199787] [2019-10-13 19:17:44,395 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:44,395 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:44,395 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:44,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:44,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:44,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:44,551 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-10-13 19:17:44,552 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032199787] [2019-10-13 19:17:44,553 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597628454] [2019-10-13 19:17:44,554 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 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 19:17:44,656 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-13 19:17:44,656 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:44,657 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-13 19:17:44,668 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:44,759 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:44,796 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-13 19:17:44,797 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:17:44,797 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2019-10-13 19:17:44,797 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292918476] [2019-10-13 19:17:44,799 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-13 19:17:44,800 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:44,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-13 19:17:44,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2019-10-13 19:17:44,800 INFO L87 Difference]: Start difference. First operand 118 states and 159 transitions. Second operand 16 states. [2019-10-13 19:17:46,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:46,156 INFO L93 Difference]: Finished difference Result 512 states and 755 transitions. [2019-10-13 19:17:46,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-10-13 19:17:46,156 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 50 [2019-10-13 19:17:46,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:46,160 INFO L225 Difference]: With dead ends: 512 [2019-10-13 19:17:46,160 INFO L226 Difference]: Without dead ends: 406 [2019-10-13 19:17:46,162 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=388, Invalid=1334, Unknown=0, NotChecked=0, Total=1722 [2019-10-13 19:17:46,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2019-10-13 19:17:46,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 158. [2019-10-13 19:17:46,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-10-13 19:17:46,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 219 transitions. [2019-10-13 19:17:46,190 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 219 transitions. Word has length 50 [2019-10-13 19:17:46,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:46,190 INFO L462 AbstractCegarLoop]: Abstraction has 158 states and 219 transitions. [2019-10-13 19:17:46,191 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-13 19:17:46,191 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 219 transitions. [2019-10-13 19:17:46,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-10-13 19:17:46,193 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:46,193 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:46,397 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:46,397 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:46,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:46,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1832133024, now seen corresponding path program 4 times [2019-10-13 19:17:46,398 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:46,398 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884729258] [2019-10-13 19:17:46,399 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:46,399 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:46,399 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:46,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:46,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:46,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:46,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:46,560 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2019-10-13 19:17:46,560 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884729258] [2019-10-13 19:17:46,561 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767401490] [2019-10-13 19:17:46,561 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:46,658 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 19:17:46,659 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:46,660 INFO L256 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 19:17:46,674 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:46,702 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2019-10-13 19:17:46,702 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:17:46,703 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 11 [2019-10-13 19:17:46,703 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635109221] [2019-10-13 19:17:46,703 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 19:17:46,704 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:46,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 19:17:46,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2019-10-13 19:17:46,704 INFO L87 Difference]: Start difference. First operand 158 states and 219 transitions. Second operand 11 states. [2019-10-13 19:17:47,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:47,104 INFO L93 Difference]: Finished difference Result 388 states and 564 transitions. [2019-10-13 19:17:47,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 19:17:47,104 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 66 [2019-10-13 19:17:47,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:47,107 INFO L225 Difference]: With dead ends: 388 [2019-10-13 19:17:47,107 INFO L226 Difference]: Without dead ends: 247 [2019-10-13 19:17:47,108 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2019-10-13 19:17:47,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2019-10-13 19:17:47,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 181. [2019-10-13 19:17:47,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2019-10-13 19:17:47,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 252 transitions. [2019-10-13 19:17:47,132 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 252 transitions. Word has length 66 [2019-10-13 19:17:47,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:47,133 INFO L462 AbstractCegarLoop]: Abstraction has 181 states and 252 transitions. [2019-10-13 19:17:47,133 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 19:17:47,133 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 252 transitions. [2019-10-13 19:17:47,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-10-13 19:17:47,137 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:47,144 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:47,348 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:47,349 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:47,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:47,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1421723573, now seen corresponding path program 5 times [2019-10-13 19:17:47,350 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:47,350 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693395688] [2019-10-13 19:17:47,350 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:47,351 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:47,351 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:47,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:47,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:47,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:47,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:47,654 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2019-10-13 19:17:47,655 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693395688] [2019-10-13 19:17:47,655 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422181528] [2019-10-13 19:17:47,655 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:47,792 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-10-13 19:17:47,793 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:47,794 INFO L256 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 19:17:47,802 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:47,823 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2019-10-13 19:17:47,824 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:17:47,824 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 12 [2019-10-13 19:17:47,824 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116390385] [2019-10-13 19:17:47,825 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 19:17:47,825 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:47,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 19:17:47,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2019-10-13 19:17:47,825 INFO L87 Difference]: Start difference. First operand 181 states and 252 transitions. Second operand 12 states. [2019-10-13 19:17:48,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:48,183 INFO L93 Difference]: Finished difference Result 432 states and 629 transitions. [2019-10-13 19:17:48,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 19:17:48,183 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 73 [2019-10-13 19:17:48,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:48,186 INFO L225 Difference]: With dead ends: 432 [2019-10-13 19:17:48,186 INFO L226 Difference]: Without dead ends: 270 [2019-10-13 19:17:48,187 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2019-10-13 19:17:48,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2019-10-13 19:17:48,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 204. [2019-10-13 19:17:48,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2019-10-13 19:17:48,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 285 transitions. [2019-10-13 19:17:48,205 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 285 transitions. Word has length 73 [2019-10-13 19:17:48,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:48,205 INFO L462 AbstractCegarLoop]: Abstraction has 204 states and 285 transitions. [2019-10-13 19:17:48,206 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 19:17:48,206 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 285 transitions. [2019-10-13 19:17:48,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-10-13 19:17:48,207 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:48,208 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:48,420 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:48,420 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:48,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:48,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1891487876, now seen corresponding path program 6 times [2019-10-13 19:17:48,421 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:48,422 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124188416] [2019-10-13 19:17:48,422 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:48,422 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:48,423 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:48,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:48,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:48,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:48,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:48,588 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2019-10-13 19:17:48,589 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124188416] [2019-10-13 19:17:48,589 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344885404] [2019-10-13 19:17:48,589 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:48,697 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-13 19:17:48,697 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:48,698 INFO L256 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-13 19:17:48,703 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:48,820 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:48,855 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 12 proven. 27 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2019-10-13 19:17:48,856 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:17:48,856 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2019-10-13 19:17:48,856 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921214942] [2019-10-13 19:17:48,857 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-13 19:17:48,857 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:48,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-13 19:17:48,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2019-10-13 19:17:48,858 INFO L87 Difference]: Start difference. First operand 204 states and 285 transitions. Second operand 20 states. [2019-10-13 19:17:51,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:51,385 INFO L93 Difference]: Finished difference Result 962 states and 1443 transitions. [2019-10-13 19:17:51,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2019-10-13 19:17:51,386 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 80 [2019-10-13 19:17:51,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:51,397 INFO L225 Difference]: With dead ends: 962 [2019-10-13 19:17:51,397 INFO L226 Difference]: Without dead ends: 776 [2019-10-13 19:17:51,400 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1151 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1086, Invalid=3336, Unknown=0, NotChecked=0, Total=4422 [2019-10-13 19:17:51,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2019-10-13 19:17:51,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 244. [2019-10-13 19:17:51,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2019-10-13 19:17:51,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 345 transitions. [2019-10-13 19:17:51,451 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 345 transitions. Word has length 80 [2019-10-13 19:17:51,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:51,453 INFO L462 AbstractCegarLoop]: Abstraction has 244 states and 345 transitions. [2019-10-13 19:17:51,453 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-13 19:17:51,453 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 345 transitions. [2019-10-13 19:17:51,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-10-13 19:17:51,456 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:51,459 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:51,670 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:51,670 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:51,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:51,671 INFO L82 PathProgramCache]: Analyzing trace with hash -577001261, now seen corresponding path program 7 times [2019-10-13 19:17:51,671 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:51,671 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917196520] [2019-10-13 19:17:51,671 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:51,672 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:51,672 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:51,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:51,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:51,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:51,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:51,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:51,802 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2019-10-13 19:17:51,802 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917196520] [2019-10-13 19:17:51,802 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511898399] [2019-10-13 19:17:51,803 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:51,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:51,906 INFO L256 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-13 19:17:51,908 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:51,925 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2019-10-13 19:17:51,926 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:17:51,926 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2019-10-13 19:17:51,926 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826204882] [2019-10-13 19:17:51,927 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 19:17:51,927 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:51,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 19:17:51,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2019-10-13 19:17:51,928 INFO L87 Difference]: Start difference. First operand 244 states and 345 transitions. Second operand 14 states. [2019-10-13 19:17:52,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:52,400 INFO L93 Difference]: Finished difference Result 588 states and 870 transitions. [2019-10-13 19:17:52,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-13 19:17:52,404 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 96 [2019-10-13 19:17:52,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:52,407 INFO L225 Difference]: With dead ends: 588 [2019-10-13 19:17:52,407 INFO L226 Difference]: Without dead ends: 367 [2019-10-13 19:17:52,409 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2019-10-13 19:17:52,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2019-10-13 19:17:52,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 267. [2019-10-13 19:17:52,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2019-10-13 19:17:52,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 378 transitions. [2019-10-13 19:17:52,430 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 378 transitions. Word has length 96 [2019-10-13 19:17:52,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:52,431 INFO L462 AbstractCegarLoop]: Abstraction has 267 states and 378 transitions. [2019-10-13 19:17:52,431 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 19:17:52,431 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 378 transitions. [2019-10-13 19:17:52,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-10-13 19:17:52,433 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:52,433 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:52,638 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:52,639 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:52,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:52,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1871912078, now seen corresponding path program 8 times [2019-10-13 19:17:52,639 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:52,640 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623362767] [2019-10-13 19:17:52,640 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:52,640 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:52,640 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:52,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:52,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:52,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:52,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:52,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:52,860 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2019-10-13 19:17:52,860 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623362767] [2019-10-13 19:17:52,861 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141587480] [2019-10-13 19:17:52,861 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:52,963 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 19:17:52,963 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:52,964 INFO L256 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 19:17:52,976 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:53,002 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2019-10-13 19:17:53,004 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:17:53,004 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 15 [2019-10-13 19:17:53,004 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984591815] [2019-10-13 19:17:53,005 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-13 19:17:53,005 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:53,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-13 19:17:53,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2019-10-13 19:17:53,006 INFO L87 Difference]: Start difference. First operand 267 states and 378 transitions. Second operand 15 states. [2019-10-13 19:17:53,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:53,601 INFO L93 Difference]: Finished difference Result 632 states and 935 transitions. [2019-10-13 19:17:53,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-13 19:17:53,601 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 103 [2019-10-13 19:17:53,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:53,604 INFO L225 Difference]: With dead ends: 632 [2019-10-13 19:17:53,604 INFO L226 Difference]: Without dead ends: 390 [2019-10-13 19:17:53,606 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2019-10-13 19:17:53,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2019-10-13 19:17:53,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 290. [2019-10-13 19:17:53,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2019-10-13 19:17:53,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 411 transitions. [2019-10-13 19:17:53,629 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 411 transitions. Word has length 103 [2019-10-13 19:17:53,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:53,630 INFO L462 AbstractCegarLoop]: Abstraction has 290 states and 411 transitions. [2019-10-13 19:17:53,630 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-13 19:17:53,630 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 411 transitions. [2019-10-13 19:17:53,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-10-13 19:17:53,632 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:53,632 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:53,838 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:53,838 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:53,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:53,838 INFO L82 PathProgramCache]: Analyzing trace with hash -2027103113, now seen corresponding path program 9 times [2019-10-13 19:17:53,839 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:53,839 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343868233] [2019-10-13 19:17:53,839 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:53,840 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:53,840 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:53,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:53,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:53,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:53,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:53,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:54,010 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2019-10-13 19:17:54,011 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343868233] [2019-10-13 19:17:54,011 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047797169] [2019-10-13 19:17:54,011 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:54,099 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-10-13 19:17:54,100 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:54,101 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-13 19:17:54,103 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:54,233 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:54,268 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 27 proven. 49 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2019-10-13 19:17:54,269 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:17:54,269 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 24 [2019-10-13 19:17:54,269 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580258364] [2019-10-13 19:17:54,270 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-13 19:17:54,270 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:54,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-13 19:17:54,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2019-10-13 19:17:54,271 INFO L87 Difference]: Start difference. First operand 290 states and 411 transitions. Second operand 24 states. [2019-10-13 19:17:58,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:58,722 INFO L93 Difference]: Finished difference Result 1532 states and 2317 transitions. [2019-10-13 19:17:58,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2019-10-13 19:17:58,723 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 110 [2019-10-13 19:17:58,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:58,735 INFO L225 Difference]: With dead ends: 1532 [2019-10-13 19:17:58,735 INFO L226 Difference]: Without dead ends: 1266 [2019-10-13 19:17:58,740 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2865 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2436, Invalid=7070, Unknown=0, NotChecked=0, Total=9506 [2019-10-13 19:17:58,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1266 states. [2019-10-13 19:17:58,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1266 to 330. [2019-10-13 19:17:58,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2019-10-13 19:17:58,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 471 transitions. [2019-10-13 19:17:58,785 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 471 transitions. Word has length 110 [2019-10-13 19:17:58,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:58,785 INFO L462 AbstractCegarLoop]: Abstraction has 330 states and 471 transitions. [2019-10-13 19:17:58,786 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-13 19:17:58,786 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 471 transitions. [2019-10-13 19:17:58,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-10-13 19:17:58,788 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:58,788 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:58,993 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:58,993 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:58,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:58,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1933400844, now seen corresponding path program 10 times [2019-10-13 19:17:58,994 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:58,994 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283324299] [2019-10-13 19:17:58,995 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:58,995 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:58,995 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:59,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:59,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:59,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:59,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:59,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:59,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:59,162 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2019-10-13 19:17:59,163 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283324299] [2019-10-13 19:17:59,163 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245532822] [2019-10-13 19:17:59,163 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:59,300 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 19:17:59,300 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:59,301 INFO L256 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-13 19:17:59,303 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:59,350 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2019-10-13 19:17:59,351 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:17:59,351 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2019-10-13 19:17:59,351 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884400115] [2019-10-13 19:17:59,351 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-13 19:17:59,351 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:59,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-13 19:17:59,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2019-10-13 19:17:59,352 INFO L87 Difference]: Start difference. First operand 330 states and 471 transitions. Second operand 17 states. [2019-10-13 19:17:59,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:59,992 INFO L93 Difference]: Finished difference Result 788 states and 1176 transitions. [2019-10-13 19:17:59,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-13 19:17:59,992 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 126 [2019-10-13 19:17:59,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:59,995 INFO L225 Difference]: With dead ends: 788 [2019-10-13 19:17:59,995 INFO L226 Difference]: Without dead ends: 487 [2019-10-13 19:17:59,997 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2019-10-13 19:17:59,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2019-10-13 19:18:00,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 353. [2019-10-13 19:18:00,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 353 states. [2019-10-13 19:18:00,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 504 transitions. [2019-10-13 19:18:00,026 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 504 transitions. Word has length 126 [2019-10-13 19:18:00,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:18:00,026 INFO L462 AbstractCegarLoop]: Abstraction has 353 states and 504 transitions. [2019-10-13 19:18:00,026 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-13 19:18:00,027 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 504 transitions. [2019-10-13 19:18:00,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-10-13 19:18:00,029 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:18:00,029 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:18:00,233 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:00,234 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:18:00,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:18:00,234 INFO L82 PathProgramCache]: Analyzing trace with hash -780097697, now seen corresponding path program 11 times [2019-10-13 19:18:00,234 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:18:00,235 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451510700] [2019-10-13 19:18:00,235 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:00,235 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:00,235 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:18:00,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:18:00,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:18:00,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:18:00,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:18:00,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:18:00,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:18:00,459 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 444 trivial. 0 not checked. [2019-10-13 19:18:00,460 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451510700] [2019-10-13 19:18:00,460 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588450655] [2019-10-13 19:18:00,460 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:00,833 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-10-13 19:18:00,833 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:18:00,836 INFO L256 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-13 19:18:00,840 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:18:00,897 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 444 trivial. 0 not checked. [2019-10-13 19:18:00,898 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:18:00,898 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 18 [2019-10-13 19:18:00,898 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036406375] [2019-10-13 19:18:00,899 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-13 19:18:00,900 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:18:00,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-13 19:18:00,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2019-10-13 19:18:00,901 INFO L87 Difference]: Start difference. First operand 353 states and 504 transitions. Second operand 18 states. [2019-10-13 19:18:01,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:18:01,508 INFO L93 Difference]: Finished difference Result 832 states and 1241 transitions. [2019-10-13 19:18:01,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-13 19:18:01,508 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 133 [2019-10-13 19:18:01,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:18:01,512 INFO L225 Difference]: With dead ends: 832 [2019-10-13 19:18:01,513 INFO L226 Difference]: Without dead ends: 510 [2019-10-13 19:18:01,515 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2019-10-13 19:18:01,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2019-10-13 19:18:01,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 376. [2019-10-13 19:18:01,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2019-10-13 19:18:01,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 537 transitions. [2019-10-13 19:18:01,547 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 537 transitions. Word has length 133 [2019-10-13 19:18:01,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:18:01,547 INFO L462 AbstractCegarLoop]: Abstraction has 376 states and 537 transitions. [2019-10-13 19:18:01,548 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-13 19:18:01,548 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 537 transitions. [2019-10-13 19:18:01,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-10-13 19:18:01,551 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:18:01,551 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:18:01,756 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:01,756 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:18:01,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:18:01,757 INFO L82 PathProgramCache]: Analyzing trace with hash 994619440, now seen corresponding path program 12 times [2019-10-13 19:18:01,758 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:18:01,758 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014093420] [2019-10-13 19:18:01,758 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:01,758 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:01,758 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:18:01,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:18:01,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:18:01,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:18:01,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:18:01,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:18:01,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:18:02,006 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 509 trivial. 0 not checked. [2019-10-13 19:18:02,006 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014093420] [2019-10-13 19:18:02,007 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425074575] [2019-10-13 19:18:02,007 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:02,316 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-10-13 19:18:02,317 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:18:02,319 INFO L256 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-13 19:18:02,322 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:18:02,551 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:18:02,613 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 48 proven. 77 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2019-10-13 19:18:02,614 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:18:02,614 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12] total 28 [2019-10-13 19:18:02,614 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179546573] [2019-10-13 19:18:02,616 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-13 19:18:02,617 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:18:02,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-13 19:18:02,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=593, Unknown=0, NotChecked=0, Total=756 [2019-10-13 19:18:02,618 INFO L87 Difference]: Start difference. First operand 376 states and 537 transitions. Second operand 28 states. [2019-10-13 19:18:09,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:18:09,799 INFO L93 Difference]: Finished difference Result 2222 states and 3377 transitions. [2019-10-13 19:18:09,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2019-10-13 19:18:09,799 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 140 [2019-10-13 19:18:09,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:18:09,811 INFO L225 Difference]: With dead ends: 2222 [2019-10-13 19:18:09,811 INFO L226 Difference]: Without dead ends: 1876 [2019-10-13 19:18:09,818 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6058 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4735, Invalid=13355, Unknown=0, NotChecked=0, Total=18090 [2019-10-13 19:18:09,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1876 states. [2019-10-13 19:18:09,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1876 to 416. [2019-10-13 19:18:09,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 416 states. [2019-10-13 19:18:09,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 597 transitions. [2019-10-13 19:18:09,878 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 597 transitions. Word has length 140 [2019-10-13 19:18:09,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:18:09,879 INFO L462 AbstractCegarLoop]: Abstraction has 416 states and 597 transitions. [2019-10-13 19:18:09,879 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-13 19:18:09,879 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 597 transitions. [2019-10-13 19:18:09,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-10-13 19:18:09,882 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:18:09,882 INFO L380 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:18:10,086 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:10,087 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:18:10,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:18:10,088 INFO L82 PathProgramCache]: Analyzing trace with hash 286872383, now seen corresponding path program 13 times [2019-10-13 19:18:10,088 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:18:10,088 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833903809] [2019-10-13 19:18:10,089 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:10,089 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:10,089 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:18:10,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:18:10,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:18:10,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:18:10,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:18:10,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:18:10,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:18:10,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:18:10,340 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 629 trivial. 0 not checked. [2019-10-13 19:18:10,341 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833903809] [2019-10-13 19:18:10,341 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53396776] [2019-10-13 19:18:10,341 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:10,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:18:10,493 INFO L256 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-13 19:18:10,495 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:18:10,523 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 629 trivial. 0 not checked. [2019-10-13 19:18:10,523 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:18:10,523 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 20 [2019-10-13 19:18:10,524 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195378656] [2019-10-13 19:18:10,524 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-13 19:18:10,524 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:18:10,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-13 19:18:10,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2019-10-13 19:18:10,525 INFO L87 Difference]: Start difference. First operand 416 states and 597 transitions. Second operand 20 states. [2019-10-13 19:18:11,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:18:11,301 INFO L93 Difference]: Finished difference Result 988 states and 1482 transitions. [2019-10-13 19:18:11,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-13 19:18:11,302 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 156 [2019-10-13 19:18:11,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:18:11,307 INFO L225 Difference]: With dead ends: 988 [2019-10-13 19:18:11,307 INFO L226 Difference]: Without dead ends: 607 [2019-10-13 19:18:11,309 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=180, Invalid=282, Unknown=0, NotChecked=0, Total=462 [2019-10-13 19:18:11,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2019-10-13 19:18:11,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 439. [2019-10-13 19:18:11,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 439 states. [2019-10-13 19:18:11,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 630 transitions. [2019-10-13 19:18:11,351 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 630 transitions. Word has length 156 [2019-10-13 19:18:11,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:18:11,351 INFO L462 AbstractCegarLoop]: Abstraction has 439 states and 630 transitions. [2019-10-13 19:18:11,351 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-13 19:18:11,351 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 630 transitions. [2019-10-13 19:18:11,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-10-13 19:18:11,353 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:18:11,354 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:18:11,558 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:11,558 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:18:11,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:18:11,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1611539014, now seen corresponding path program 14 times [2019-10-13 19:18:11,559 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:18:11,559 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370882125] [2019-10-13 19:18:11,559 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:11,560 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:11,560 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:18:11,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:18:11,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:18:11,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:18:11,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:18:11,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:18:11,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:18:11,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:18:11,816 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 705 trivial. 0 not checked. [2019-10-13 19:18:11,817 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370882125] [2019-10-13 19:18:11,817 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997676968] [2019-10-13 19:18:11,817 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:11,956 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 19:18:11,956 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:18:11,957 INFO L256 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-13 19:18:11,960 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:18:12,011 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 705 trivial. 0 not checked. [2019-10-13 19:18:12,011 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:18:12,011 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 21 [2019-10-13 19:18:12,012 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555931718] [2019-10-13 19:18:12,012 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-13 19:18:12,012 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:18:12,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-13 19:18:12,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2019-10-13 19:18:12,013 INFO L87 Difference]: Start difference. First operand 439 states and 630 transitions. Second operand 21 states. [2019-10-13 19:18:12,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:18:12,937 INFO L93 Difference]: Finished difference Result 1032 states and 1547 transitions. [2019-10-13 19:18:12,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-13 19:18:12,937 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 163 [2019-10-13 19:18:12,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:18:12,940 INFO L225 Difference]: With dead ends: 1032 [2019-10-13 19:18:12,941 INFO L226 Difference]: Without dead ends: 630 [2019-10-13 19:18:12,943 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=199, Invalid=307, Unknown=0, NotChecked=0, Total=506 [2019-10-13 19:18:12,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2019-10-13 19:18:12,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 462. [2019-10-13 19:18:12,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 462 states. [2019-10-13 19:18:12,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 663 transitions. [2019-10-13 19:18:12,989 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 663 transitions. Word has length 163 [2019-10-13 19:18:12,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:18:12,990 INFO L462 AbstractCegarLoop]: Abstraction has 462 states and 663 transitions. [2019-10-13 19:18:12,990 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-13 19:18:12,990 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 663 transitions. [2019-10-13 19:18:12,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-10-13 19:18:12,992 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:18:12,993 INFO L380 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:18:13,197 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:13,198 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:18:13,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:18:13,198 INFO L82 PathProgramCache]: Analyzing trace with hash -323900957, now seen corresponding path program 15 times [2019-10-13 19:18:13,198 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:18:13,199 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576529014] [2019-10-13 19:18:13,199 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:13,199 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:13,199 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:18:13,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:18:13,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:18:13,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:18:13,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:18:13,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:18:13,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:18:13,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:18:13,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1042 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 786 trivial. 0 not checked. [2019-10-13 19:18:13,512 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576529014] [2019-10-13 19:18:13,513 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824242085] [2019-10-13 19:18:13,513 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:13,708 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-10-13 19:18:13,709 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:18:13,710 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-13 19:18:13,714 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:18:13,910 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:18:13,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1042 backedges. 75 proven. 111 refuted. 0 times theorem prover too weak. 856 trivial. 0 not checked. [2019-10-13 19:18:13,981 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:18:13,982 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 13] total 32 [2019-10-13 19:18:13,982 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863060443] [2019-10-13 19:18:13,982 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-10-13 19:18:13,983 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:18:13,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-10-13 19:18:13,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=769, Unknown=0, NotChecked=0, Total=992 [2019-10-13 19:18:13,984 INFO L87 Difference]: Start difference. First operand 462 states and 663 transitions. Second operand 32 states.