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 0.1.24-13a467a-m [2019-10-14 23:16:36,657 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:16:36,660 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:16:36,678 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:16:36,678 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:16:36,680 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:16:36,682 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:16:36,692 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:16:36,693 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:16:36,694 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:16:36,695 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:16:36,696 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:16:36,697 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:16:36,698 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:16:36,698 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:16:36,699 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:16:36,700 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:16:36,701 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:16:36,703 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:16:36,704 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:16:36,706 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:16:36,707 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:16:36,708 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:16:36,709 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:16:36,713 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 23:16:36,714 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 23:16:36,714 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 23:16:36,715 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 23:16:36,715 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 23:16:36,716 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 23:16:36,716 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:16:36,717 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:16:36,718 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:16:36,718 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:16:36,719 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:16:36,719 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:16:36,720 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:16:36,720 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:16:36,721 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:16:36,722 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:16:36,722 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:16:36,723 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 [2019-10-14 23:16:36,737 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:16:36,737 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:16:36,738 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:16:36,738 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:16:36,738 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:16:36,739 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:16:36,739 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:16:36,739 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:16:36,739 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:16:36,739 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:16:36,740 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:16:36,740 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:16:36,740 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:16:36,740 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:16:36,740 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:16:36,741 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:16:36,741 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:16:36,741 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:16:36,741 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:16:36,741 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:16:36,742 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:16:36,742 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:16:36,742 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:16:36,742 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:16:36,742 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:16:36,743 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:16:36,743 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:16:36,743 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:16:36,743 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:16:37,034 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:16:37,050 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:16:37,054 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:16:37,055 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:16:37,056 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:16:37,056 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/n.c24.i [2019-10-14 23:16:37,118 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/556a2996c/6a5e1a124e914fb88225781c2af7da55/FLAG0692dbcaf [2019-10-14 23:16:37,556 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:16:37,557 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/n.c24.i [2019-10-14 23:16:37,566 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/556a2996c/6a5e1a124e914fb88225781c2af7da55/FLAG0692dbcaf [2019-10-14 23:16:37,943 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/556a2996c/6a5e1a124e914fb88225781c2af7da55 [2019-10-14 23:16:37,951 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:16:37,953 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:16:37,954 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:16:37,954 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:16:37,958 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:16:37,959 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:16:37" (1/1) ... [2019-10-14 23:16:37,962 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f501c32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:37, skipping insertion in model container [2019-10-14 23:16:37,962 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:16:37" (1/1) ... [2019-10-14 23:16:37,968 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:16:38,006 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:16:38,234 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:16:38,338 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:16:38,374 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:16:38,417 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:16:38,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:38 WrapperNode [2019-10-14 23:16:38,418 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:16:38,419 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:16:38,419 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:16:38,419 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:16:38,433 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:38" (1/1) ... [2019-10-14 23:16:38,433 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:38" (1/1) ... [2019-10-14 23:16:38,445 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:38" (1/1) ... [2019-10-14 23:16:38,446 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:38" (1/1) ... [2019-10-14 23:16:38,460 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:38" (1/1) ... [2019-10-14 23:16:38,470 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:38" (1/1) ... [2019-10-14 23:16:38,473 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:38" (1/1) ... [2019-10-14 23:16:38,481 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:16:38,485 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:16:38,486 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:16:38,486 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:16:38,487 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:38" (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 [2019-10-14 23:16:38,541 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:16:38,542 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:16:38,542 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 23:16:38,542 INFO L138 BoogieDeclarations]: Found implementation of procedure bar [2019-10-14 23:16:38,542 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2019-10-14 23:16:38,542 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:16:38,543 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memmove [2019-10-14 23:16:38,543 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:16:38,543 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 23:16:38,543 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2019-10-14 23:16:38,543 INFO L130 BoogieDeclarations]: Found specification of procedure memmove [2019-10-14 23:16:38,544 INFO L130 BoogieDeclarations]: Found specification of procedure memccpy [2019-10-14 23:16:38,544 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2019-10-14 23:16:38,544 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2019-10-14 23:16:38,544 INFO L130 BoogieDeclarations]: Found specification of procedure memchr [2019-10-14 23:16:38,545 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2019-10-14 23:16:38,545 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2019-10-14 23:16:38,545 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2019-10-14 23:16:38,545 INFO L130 BoogieDeclarations]: Found specification of procedure strncat [2019-10-14 23:16:38,545 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2019-10-14 23:16:38,546 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2019-10-14 23:16:38,546 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll [2019-10-14 23:16:38,546 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm [2019-10-14 23:16:38,546 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll_l [2019-10-14 23:16:38,546 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm_l [2019-10-14 23:16:38,546 INFO L130 BoogieDeclarations]: Found specification of procedure strdup [2019-10-14 23:16:38,547 INFO L130 BoogieDeclarations]: Found specification of procedure strndup [2019-10-14 23:16:38,547 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2019-10-14 23:16:38,547 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2019-10-14 23:16:38,547 INFO L130 BoogieDeclarations]: Found specification of procedure strcspn [2019-10-14 23:16:38,547 INFO L130 BoogieDeclarations]: Found specification of procedure strspn [2019-10-14 23:16:38,547 INFO L130 BoogieDeclarations]: Found specification of procedure strpbrk [2019-10-14 23:16:38,547 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2019-10-14 23:16:38,547 INFO L130 BoogieDeclarations]: Found specification of procedure strtok [2019-10-14 23:16:38,548 INFO L130 BoogieDeclarations]: Found specification of procedure __strtok_r [2019-10-14 23:16:38,548 INFO L130 BoogieDeclarations]: Found specification of procedure strtok_r [2019-10-14 23:16:38,548 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2019-10-14 23:16:38,548 INFO L130 BoogieDeclarations]: Found specification of procedure strnlen [2019-10-14 23:16:38,548 INFO L130 BoogieDeclarations]: Found specification of procedure strerror [2019-10-14 23:16:38,548 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_r [2019-10-14 23:16:38,548 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_l [2019-10-14 23:16:38,548 INFO L130 BoogieDeclarations]: Found specification of procedure __bzero [2019-10-14 23:16:38,548 INFO L130 BoogieDeclarations]: Found specification of procedure bcopy [2019-10-14 23:16:38,549 INFO L130 BoogieDeclarations]: Found specification of procedure bzero [2019-10-14 23:16:38,549 INFO L130 BoogieDeclarations]: Found specification of procedure bcmp [2019-10-14 23:16:38,549 INFO L130 BoogieDeclarations]: Found specification of procedure index [2019-10-14 23:16:38,549 INFO L130 BoogieDeclarations]: Found specification of procedure rindex [2019-10-14 23:16:38,549 INFO L130 BoogieDeclarations]: Found specification of procedure ffs [2019-10-14 23:16:38,549 INFO L130 BoogieDeclarations]: Found specification of procedure strcasecmp [2019-10-14 23:16:38,549 INFO L130 BoogieDeclarations]: Found specification of procedure strncasecmp [2019-10-14 23:16:38,549 INFO L130 BoogieDeclarations]: Found specification of procedure strsep [2019-10-14 23:16:38,550 INFO L130 BoogieDeclarations]: Found specification of procedure strsignal [2019-10-14 23:16:38,550 INFO L130 BoogieDeclarations]: Found specification of procedure __stpcpy [2019-10-14 23:16:38,550 INFO L130 BoogieDeclarations]: Found specification of procedure stpcpy [2019-10-14 23:16:38,550 INFO L130 BoogieDeclarations]: Found specification of procedure __stpncpy [2019-10-14 23:16:38,550 INFO L130 BoogieDeclarations]: Found specification of procedure stpncpy [2019-10-14 23:16:38,550 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:16:38,550 INFO L130 BoogieDeclarations]: Found specification of procedure bar [2019-10-14 23:16:38,551 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2019-10-14 23:16:38,551 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 23:16:38,551 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 23:16:38,551 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:16:38,551 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 23:16:38,551 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memmove [2019-10-14 23:16:38,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 23:16:38,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:16:38,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:16:38,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2019-10-14 23:16:38,552 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2019-10-14 23:16:39,054 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:16:39,055 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-14 23:16:39,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:16:39 BoogieIcfgContainer [2019-10-14 23:16:39,056 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:16:39,058 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:16:39,058 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:16:39,061 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:16:39,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:16:37" (1/3) ... [2019-10-14 23:16:39,062 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78e05935 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:16:39, skipping insertion in model container [2019-10-14 23:16:39,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:38" (2/3) ... [2019-10-14 23:16:39,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78e05935 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:16:39, skipping insertion in model container [2019-10-14 23:16:39,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:16:39" (3/3) ... [2019-10-14 23:16:39,065 INFO L109 eAbstractionObserver]: Analyzing ICFG n.c24.i [2019-10-14 23:16:39,074 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:16:39,081 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:16:39,092 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:16:39,115 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:16:39,115 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:16:39,115 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:16:39,116 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:16:39,116 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:16:39,116 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:16:39,116 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:16:39,116 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:16:39,134 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states. [2019-10-14 23:16:39,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-14 23:16:39,141 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:39,142 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:39,144 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:39,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:39,150 INFO L82 PathProgramCache]: Analyzing trace with hash -581213385, now seen corresponding path program 1 times [2019-10-14 23:16:39,159 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:39,160 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593985435] [2019-10-14 23:16:39,160 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:39,160 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:39,160 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:39,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:39,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:39,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:39,349 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593985435] [2019-10-14 23:16:39,351 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:16:39,351 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:16:39,351 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465205616] [2019-10-14 23:16:39,356 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:16:39,356 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:39,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:16:39,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:16:39,369 INFO L87 Difference]: Start difference. First operand 53 states. Second operand 4 states. [2019-10-14 23:16:39,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:39,643 INFO L93 Difference]: Finished difference Result 123 states and 177 transitions. [2019-10-14 23:16:39,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:16:39,645 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-10-14 23:16:39,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:39,657 INFO L225 Difference]: With dead ends: 123 [2019-10-14 23:16:39,657 INFO L226 Difference]: Without dead ends: 69 [2019-10-14 23:16:39,663 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 [2019-10-14 23:16:39,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-10-14 23:16:39,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 48. [2019-10-14 23:16:39,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-10-14 23:16:39,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2019-10-14 23:16:39,722 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 13 [2019-10-14 23:16:39,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:39,722 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2019-10-14 23:16:39,722 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:16:39,723 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2019-10-14 23:16:39,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-14 23:16:39,724 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:39,724 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] [2019-10-14 23:16:39,724 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:39,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:39,725 INFO L82 PathProgramCache]: Analyzing trace with hash -351648040, now seen corresponding path program 1 times [2019-10-14 23:16:39,725 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:39,725 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876772856] [2019-10-14 23:16:39,726 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:39,726 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:39,726 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:39,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:39,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:39,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 23:16:39,825 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876772856] [2019-10-14 23:16:39,825 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824336511] [2019-10-14 23:16:39,826 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 [2019-10-14 23:16:39,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:39,939 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 23:16:39,945 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:39,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 23:16:39,975 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:39,976 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-14 23:16:39,976 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958284615] [2019-10-14 23:16:39,978 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:16:39,978 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:39,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:16:39,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:16:39,979 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand 6 states. [2019-10-14 23:16:40,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:40,193 INFO L93 Difference]: Finished difference Result 131 states and 172 transitions. [2019-10-14 23:16:40,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:16:40,194 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2019-10-14 23:16:40,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:40,196 INFO L225 Difference]: With dead ends: 131 [2019-10-14 23:16:40,196 INFO L226 Difference]: Without dead ends: 92 [2019-10-14 23:16:40,199 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 [2019-10-14 23:16:40,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-10-14 23:16:40,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 71. [2019-10-14 23:16:40,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-10-14 23:16:40,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 91 transitions. [2019-10-14 23:16:40,223 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 91 transitions. Word has length 20 [2019-10-14 23:16:40,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:40,224 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 91 transitions. [2019-10-14 23:16:40,224 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:16:40,225 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 91 transitions. [2019-10-14 23:16:40,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-14 23:16:40,227 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:40,227 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] [2019-10-14 23:16:40,431 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:40,431 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:40,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:40,432 INFO L82 PathProgramCache]: Analyzing trace with hash 613250579, now seen corresponding path program 2 times [2019-10-14 23:16:40,433 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:40,433 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742033196] [2019-10-14 23:16:40,433 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:40,434 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:40,434 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:40,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:40,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:40,540 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 23:16:40,541 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742033196] [2019-10-14 23:16:40,541 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495184610] [2019-10-14 23:16:40,541 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 [2019-10-14 23:16:40,627 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:16:40,628 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:40,629 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 23:16:40,632 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:40,673 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 23:16:40,674 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:40,674 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2019-10-14 23:16:40,674 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348671689] [2019-10-14 23:16:40,675 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:16:40,675 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:40,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:16:40,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:16:40,676 INFO L87 Difference]: Start difference. First operand 71 states and 91 transitions. Second operand 5 states. [2019-10-14 23:16:40,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:40,736 INFO L93 Difference]: Finished difference Result 116 states and 156 transitions. [2019-10-14 23:16:40,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:16:40,738 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2019-10-14 23:16:40,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:40,739 INFO L225 Difference]: With dead ends: 116 [2019-10-14 23:16:40,740 INFO L226 Difference]: Without dead ends: 111 [2019-10-14 23:16:40,742 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 [2019-10-14 23:16:40,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-10-14 23:16:40,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 72. [2019-10-14 23:16:40,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-10-14 23:16:40,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 93 transitions. [2019-10-14 23:16:40,768 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 93 transitions. Word has length 27 [2019-10-14 23:16:40,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:40,768 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 93 transitions. [2019-10-14 23:16:40,768 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:16:40,769 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 93 transitions. [2019-10-14 23:16:40,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-14 23:16:40,770 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:40,771 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] [2019-10-14 23:16:40,983 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:40,984 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:40,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:40,984 INFO L82 PathProgramCache]: Analyzing trace with hash 423568487, now seen corresponding path program 1 times [2019-10-14 23:16:40,984 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:40,985 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18134426] [2019-10-14 23:16:40,985 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:40,985 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:40,985 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:41,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:41,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:41,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:41,136 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 23:16:41,139 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18134426] [2019-10-14 23:16:41,139 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353838417] [2019-10-14 23:16:41,139 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 [2019-10-14 23:16:41,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:41,241 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:16:41,245 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:41,267 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 23:16:41,267 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:41,268 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 8 [2019-10-14 23:16:41,268 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67981704] [2019-10-14 23:16:41,269 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 23:16:41,269 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:41,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 23:16:41,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:16:41,271 INFO L87 Difference]: Start difference. First operand 72 states and 93 transitions. Second operand 8 states. [2019-10-14 23:16:41,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:41,599 INFO L93 Difference]: Finished difference Result 188 states and 258 transitions. [2019-10-14 23:16:41,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:16:41,601 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2019-10-14 23:16:41,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:41,608 INFO L225 Difference]: With dead ends: 188 [2019-10-14 23:16:41,608 INFO L226 Difference]: Without dead ends: 127 [2019-10-14 23:16:41,611 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 [2019-10-14 23:16:41,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2019-10-14 23:16:41,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 95. [2019-10-14 23:16:41,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-10-14 23:16:41,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 126 transitions. [2019-10-14 23:16:41,639 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 126 transitions. Word has length 36 [2019-10-14 23:16:41,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:41,639 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 126 transitions. [2019-10-14 23:16:41,639 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 23:16:41,639 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 126 transitions. [2019-10-14 23:16:41,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-14 23:16:41,646 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:41,647 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] [2019-10-14 23:16:41,850 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:41,851 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:41,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:41,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1884917406, now seen corresponding path program 2 times [2019-10-14 23:16:41,852 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:41,853 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096856666] [2019-10-14 23:16:41,853 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:41,853 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:41,853 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:41,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:41,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:41,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:41,995 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-14 23:16:41,995 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096856666] [2019-10-14 23:16:41,996 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117675996] [2019-10-14 23:16:41,996 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 [2019-10-14 23:16:42,073 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:16:42,073 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:42,074 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 23:16:42,076 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:42,091 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-14 23:16:42,091 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:42,091 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 9 [2019-10-14 23:16:42,091 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559451799] [2019-10-14 23:16:42,092 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:16:42,092 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:42,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:16:42,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:16:42,093 INFO L87 Difference]: Start difference. First operand 95 states and 126 transitions. Second operand 9 states. [2019-10-14 23:16:42,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:42,388 INFO L93 Difference]: Finished difference Result 232 states and 323 transitions. [2019-10-14 23:16:42,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 23:16:42,390 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 43 [2019-10-14 23:16:42,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:42,392 INFO L225 Difference]: With dead ends: 232 [2019-10-14 23:16:42,392 INFO L226 Difference]: Without dead ends: 150 [2019-10-14 23:16:42,393 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 [2019-10-14 23:16:42,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2019-10-14 23:16:42,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 118. [2019-10-14 23:16:42,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-10-14 23:16:42,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 159 transitions. [2019-10-14 23:16:42,409 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 159 transitions. Word has length 43 [2019-10-14 23:16:42,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:42,409 INFO L462 AbstractCegarLoop]: Abstraction has 118 states and 159 transitions. [2019-10-14 23:16:42,410 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:16:42,410 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 159 transitions. [2019-10-14 23:16:42,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-10-14 23:16:42,412 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:42,412 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] [2019-10-14 23:16:42,619 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:42,620 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:42,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:42,620 INFO L82 PathProgramCache]: Analyzing trace with hash 708097291, now seen corresponding path program 3 times [2019-10-14 23:16:42,620 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:42,621 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381075298] [2019-10-14 23:16:42,621 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:42,621 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:42,621 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:42,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:42,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:42,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:42,741 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-10-14 23:16:42,742 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381075298] [2019-10-14 23:16:42,742 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394861818] [2019-10-14 23:16:42,742 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 [2019-10-14 23:16:42,829 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 23:16:42,830 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:42,831 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-14 23:16:42,833 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:42,931 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:42,969 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-14 23:16:42,970 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:42,970 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2019-10-14 23:16:42,970 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706985070] [2019-10-14 23:16:42,973 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 23:16:42,973 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:42,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 23:16:42,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2019-10-14 23:16:42,974 INFO L87 Difference]: Start difference. First operand 118 states and 159 transitions. Second operand 16 states. [2019-10-14 23:16:44,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:44,299 INFO L93 Difference]: Finished difference Result 512 states and 755 transitions. [2019-10-14 23:16:44,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-10-14 23:16:44,300 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 50 [2019-10-14 23:16:44,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:44,304 INFO L225 Difference]: With dead ends: 512 [2019-10-14 23:16:44,304 INFO L226 Difference]: Without dead ends: 406 [2019-10-14 23:16:44,307 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 [2019-10-14 23:16:44,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2019-10-14 23:16:44,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 158. [2019-10-14 23:16:44,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-10-14 23:16:44,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 219 transitions. [2019-10-14 23:16:44,334 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 219 transitions. Word has length 50 [2019-10-14 23:16:44,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:44,334 INFO L462 AbstractCegarLoop]: Abstraction has 158 states and 219 transitions. [2019-10-14 23:16:44,334 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 23:16:44,334 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 219 transitions. [2019-10-14 23:16:44,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-10-14 23:16:44,338 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:44,338 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] [2019-10-14 23:16:44,545 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:44,545 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:44,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:44,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1832133024, now seen corresponding path program 4 times [2019-10-14 23:16:44,546 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:44,546 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304764517] [2019-10-14 23:16:44,546 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:44,547 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:44,547 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:44,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:44,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:44,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:44,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:44,693 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2019-10-14 23:16:44,694 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304764517] [2019-10-14 23:16:44,694 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87294916] [2019-10-14 23:16:44,694 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 [2019-10-14 23:16:44,792 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:16:44,793 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:44,794 INFO L256 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 23:16:44,809 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:44,851 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2019-10-14 23:16:44,853 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:44,855 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 11 [2019-10-14 23:16:44,855 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645397556] [2019-10-14 23:16:44,856 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 23:16:44,856 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:44,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 23:16:44,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:16:44,857 INFO L87 Difference]: Start difference. First operand 158 states and 219 transitions. Second operand 11 states. [2019-10-14 23:16:45,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:45,316 INFO L93 Difference]: Finished difference Result 388 states and 564 transitions. [2019-10-14 23:16:45,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 23:16:45,316 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 66 [2019-10-14 23:16:45,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:45,319 INFO L225 Difference]: With dead ends: 388 [2019-10-14 23:16:45,319 INFO L226 Difference]: Without dead ends: 247 [2019-10-14 23:16:45,320 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 [2019-10-14 23:16:45,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2019-10-14 23:16:45,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 181. [2019-10-14 23:16:45,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2019-10-14 23:16:45,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 252 transitions. [2019-10-14 23:16:45,339 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 252 transitions. Word has length 66 [2019-10-14 23:16:45,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:45,339 INFO L462 AbstractCegarLoop]: Abstraction has 181 states and 252 transitions. [2019-10-14 23:16:45,339 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 23:16:45,339 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 252 transitions. [2019-10-14 23:16:45,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-10-14 23:16:45,342 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:45,342 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] [2019-10-14 23:16:45,547 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:45,547 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:45,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:45,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1421723573, now seen corresponding path program 5 times [2019-10-14 23:16:45,548 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:45,548 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403668921] [2019-10-14 23:16:45,548 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:45,549 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:45,549 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:45,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:45,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:45,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:45,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:45,700 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2019-10-14 23:16:45,700 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403668921] [2019-10-14 23:16:45,701 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481369566] [2019-10-14 23:16:45,701 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 [2019-10-14 23:16:45,816 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-10-14 23:16:45,816 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:45,818 INFO L256 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 23:16:45,824 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:45,846 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2019-10-14 23:16:45,847 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:45,847 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 12 [2019-10-14 23:16:45,850 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454640959] [2019-10-14 23:16:45,851 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 23:16:45,851 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:45,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 23:16:45,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:16:45,852 INFO L87 Difference]: Start difference. First operand 181 states and 252 transitions. Second operand 12 states. [2019-10-14 23:16:46,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:46,207 INFO L93 Difference]: Finished difference Result 432 states and 629 transitions. [2019-10-14 23:16:46,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 23:16:46,207 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 73 [2019-10-14 23:16:46,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:46,210 INFO L225 Difference]: With dead ends: 432 [2019-10-14 23:16:46,210 INFO L226 Difference]: Without dead ends: 270 [2019-10-14 23:16:46,211 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2019-10-14 23:16:46,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2019-10-14 23:16:46,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 204. [2019-10-14 23:16:46,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2019-10-14 23:16:46,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 285 transitions. [2019-10-14 23:16:46,229 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 285 transitions. Word has length 73 [2019-10-14 23:16:46,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:46,229 INFO L462 AbstractCegarLoop]: Abstraction has 204 states and 285 transitions. [2019-10-14 23:16:46,230 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 23:16:46,230 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 285 transitions. [2019-10-14 23:16:46,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-10-14 23:16:46,232 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:46,232 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] [2019-10-14 23:16:46,436 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:46,437 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:46,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:46,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1891487876, now seen corresponding path program 6 times [2019-10-14 23:16:46,438 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:46,438 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553121224] [2019-10-14 23:16:46,438 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:46,439 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:46,439 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:46,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:46,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:46,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:46,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:46,617 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2019-10-14 23:16:46,618 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553121224] [2019-10-14 23:16:46,618 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17571783] [2019-10-14 23:16:46,618 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 [2019-10-14 23:16:46,727 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-14 23:16:46,727 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:46,728 INFO L256 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 23:16:46,731 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:46,834 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:46,868 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 12 proven. 27 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2019-10-14 23:16:46,869 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:46,869 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2019-10-14 23:16:46,869 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248187654] [2019-10-14 23:16:46,870 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-14 23:16:46,870 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:46,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-14 23:16:46,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2019-10-14 23:16:46,871 INFO L87 Difference]: Start difference. First operand 204 states and 285 transitions. Second operand 20 states. [2019-10-14 23:16:49,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:49,477 INFO L93 Difference]: Finished difference Result 962 states and 1443 transitions. [2019-10-14 23:16:49,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2019-10-14 23:16:49,478 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 80 [2019-10-14 23:16:49,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:49,485 INFO L225 Difference]: With dead ends: 962 [2019-10-14 23:16:49,485 INFO L226 Difference]: Without dead ends: 776 [2019-10-14 23:16:49,487 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 [2019-10-14 23:16:49,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2019-10-14 23:16:49,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 244. [2019-10-14 23:16:49,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2019-10-14 23:16:49,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 345 transitions. [2019-10-14 23:16:49,519 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 345 transitions. Word has length 80 [2019-10-14 23:16:49,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:49,519 INFO L462 AbstractCegarLoop]: Abstraction has 244 states and 345 transitions. [2019-10-14 23:16:49,519 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-14 23:16:49,519 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 345 transitions. [2019-10-14 23:16:49,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-10-14 23:16:49,521 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:49,521 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] [2019-10-14 23:16:49,725 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:49,726 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:49,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:49,726 INFO L82 PathProgramCache]: Analyzing trace with hash -577001261, now seen corresponding path program 7 times [2019-10-14 23:16:49,727 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:49,727 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794779098] [2019-10-14 23:16:49,727 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:49,728 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:49,728 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:49,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:49,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:49,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:49,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:49,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:49,869 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2019-10-14 23:16:49,869 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794779098] [2019-10-14 23:16:49,870 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110902571] [2019-10-14 23:16:49,870 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 [2019-10-14 23:16:49,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:49,990 INFO L256 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 23:16:49,996 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:50,038 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2019-10-14 23:16:50,038 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:50,038 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2019-10-14 23:16:50,039 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910697972] [2019-10-14 23:16:50,040 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 23:16:50,041 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:50,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 23:16:50,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2019-10-14 23:16:50,041 INFO L87 Difference]: Start difference. First operand 244 states and 345 transitions. Second operand 14 states. [2019-10-14 23:16:50,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:50,459 INFO L93 Difference]: Finished difference Result 588 states and 870 transitions. [2019-10-14 23:16:50,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-14 23:16:50,459 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 96 [2019-10-14 23:16:50,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:50,463 INFO L225 Difference]: With dead ends: 588 [2019-10-14 23:16:50,463 INFO L226 Difference]: Without dead ends: 367 [2019-10-14 23:16:50,465 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2019-10-14 23:16:50,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2019-10-14 23:16:50,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 267. [2019-10-14 23:16:50,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2019-10-14 23:16:50,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 378 transitions. [2019-10-14 23:16:50,490 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 378 transitions. Word has length 96 [2019-10-14 23:16:50,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:50,491 INFO L462 AbstractCegarLoop]: Abstraction has 267 states and 378 transitions. [2019-10-14 23:16:50,491 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 23:16:50,491 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 378 transitions. [2019-10-14 23:16:50,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-10-14 23:16:50,493 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:50,493 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] [2019-10-14 23:16:50,702 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:50,703 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:50,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:50,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1871912078, now seen corresponding path program 8 times [2019-10-14 23:16:50,704 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:50,704 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379588853] [2019-10-14 23:16:50,704 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:50,704 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:50,704 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:50,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:50,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:50,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:50,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:50,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:50,901 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2019-10-14 23:16:50,902 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379588853] [2019-10-14 23:16:50,902 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767057514] [2019-10-14 23:16:50,902 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 [2019-10-14 23:16:51,039 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:16:51,039 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:51,041 INFO L256 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 23:16:51,050 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:51,080 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2019-10-14 23:16:51,081 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:51,081 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 15 [2019-10-14 23:16:51,082 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236204078] [2019-10-14 23:16:51,082 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 23:16:51,082 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:51,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 23:16:51,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2019-10-14 23:16:51,083 INFO L87 Difference]: Start difference. First operand 267 states and 378 transitions. Second operand 15 states. [2019-10-14 23:16:51,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:51,653 INFO L93 Difference]: Finished difference Result 632 states and 935 transitions. [2019-10-14 23:16:51,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-14 23:16:51,658 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 103 [2019-10-14 23:16:51,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:51,660 INFO L225 Difference]: With dead ends: 632 [2019-10-14 23:16:51,661 INFO L226 Difference]: Without dead ends: 390 [2019-10-14 23:16:51,662 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 [2019-10-14 23:16:51,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2019-10-14 23:16:51,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 290. [2019-10-14 23:16:51,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2019-10-14 23:16:51,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 411 transitions. [2019-10-14 23:16:51,683 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 411 transitions. Word has length 103 [2019-10-14 23:16:51,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:51,684 INFO L462 AbstractCegarLoop]: Abstraction has 290 states and 411 transitions. [2019-10-14 23:16:51,684 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 23:16:51,684 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 411 transitions. [2019-10-14 23:16:51,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-10-14 23:16:51,686 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:51,686 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] [2019-10-14 23:16:51,898 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:51,898 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:51,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:51,898 INFO L82 PathProgramCache]: Analyzing trace with hash -2027103113, now seen corresponding path program 9 times [2019-10-14 23:16:51,898 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:51,899 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082297171] [2019-10-14 23:16:51,899 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:51,899 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:51,899 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:51,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:52,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:52,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:52,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:52,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:52,080 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2019-10-14 23:16:52,080 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082297171] [2019-10-14 23:16:52,080 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538728265] [2019-10-14 23:16:52,080 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 [2019-10-14 23:16:52,181 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-10-14 23:16:52,181 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:52,182 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-14 23:16:52,185 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:52,304 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:52,341 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 27 proven. 49 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2019-10-14 23:16:52,342 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:52,342 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 24 [2019-10-14 23:16:52,342 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324261112] [2019-10-14 23:16:52,343 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-14 23:16:52,343 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:52,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-14 23:16:52,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2019-10-14 23:16:52,344 INFO L87 Difference]: Start difference. First operand 290 states and 411 transitions. Second operand 24 states. [2019-10-14 23:16:57,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:57,118 INFO L93 Difference]: Finished difference Result 1532 states and 2317 transitions. [2019-10-14 23:16:57,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2019-10-14 23:16:57,118 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 110 [2019-10-14 23:16:57,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:57,128 INFO L225 Difference]: With dead ends: 1532 [2019-10-14 23:16:57,128 INFO L226 Difference]: Without dead ends: 1266 [2019-10-14 23:16:57,134 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2865 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2436, Invalid=7070, Unknown=0, NotChecked=0, Total=9506 [2019-10-14 23:16:57,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1266 states. [2019-10-14 23:16:57,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1266 to 330. [2019-10-14 23:16:57,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2019-10-14 23:16:57,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 471 transitions. [2019-10-14 23:16:57,194 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 471 transitions. Word has length 110 [2019-10-14 23:16:57,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:57,195 INFO L462 AbstractCegarLoop]: Abstraction has 330 states and 471 transitions. [2019-10-14 23:16:57,195 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-14 23:16:57,195 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 471 transitions. [2019-10-14 23:16:57,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-10-14 23:16:57,199 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:57,199 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] [2019-10-14 23:16:57,405 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:57,405 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:57,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:57,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1933400844, now seen corresponding path program 10 times [2019-10-14 23:16:57,406 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:57,406 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562836113] [2019-10-14 23:16:57,406 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:57,406 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:57,407 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:57,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:57,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:57,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:57,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:57,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:57,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:57,610 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2019-10-14 23:16:57,610 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562836113] [2019-10-14 23:16:57,610 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549123889] [2019-10-14 23:16:57,611 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 [2019-10-14 23:16:57,733 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:16:57,733 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:57,735 INFO L256 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-14 23:16:57,736 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:57,758 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2019-10-14 23:16:57,758 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:57,758 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2019-10-14 23:16:57,758 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931695884] [2019-10-14 23:16:57,759 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-14 23:16:57,759 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:57,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-14 23:16:57,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2019-10-14 23:16:57,760 INFO L87 Difference]: Start difference. First operand 330 states and 471 transitions. Second operand 17 states. [2019-10-14 23:16:58,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:58,455 INFO L93 Difference]: Finished difference Result 788 states and 1176 transitions. [2019-10-14 23:16:58,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 23:16:58,455 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 126 [2019-10-14 23:16:58,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:58,459 INFO L225 Difference]: With dead ends: 788 [2019-10-14 23:16:58,460 INFO L226 Difference]: Without dead ends: 487 [2019-10-14 23:16:58,461 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 [2019-10-14 23:16:58,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2019-10-14 23:16:58,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 353. [2019-10-14 23:16:58,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 353 states. [2019-10-14 23:16:58,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 504 transitions. [2019-10-14 23:16:58,496 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 504 transitions. Word has length 126 [2019-10-14 23:16:58,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:58,496 INFO L462 AbstractCegarLoop]: Abstraction has 353 states and 504 transitions. [2019-10-14 23:16:58,496 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-14 23:16:58,497 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 504 transitions. [2019-10-14 23:16:58,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-10-14 23:16:58,499 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:58,499 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] [2019-10-14 23:16:58,703 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:58,703 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:58,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:58,704 INFO L82 PathProgramCache]: Analyzing trace with hash -780097697, now seen corresponding path program 11 times [2019-10-14 23:16:58,704 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:58,704 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953915383] [2019-10-14 23:16:58,704 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:58,705 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:58,705 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:58,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:58,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:58,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:58,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:58,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:58,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:58,923 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 444 trivial. 0 not checked. [2019-10-14 23:16:58,923 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953915383] [2019-10-14 23:16:58,924 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756322055] [2019-10-14 23:16:58,924 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 [2019-10-14 23:16:59,144 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-10-14 23:16:59,144 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:59,147 INFO L256 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-14 23:16:59,150 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:59,171 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 444 trivial. 0 not checked. [2019-10-14 23:16:59,171 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:59,171 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 18 [2019-10-14 23:16:59,172 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924561101] [2019-10-14 23:16:59,172 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-14 23:16:59,172 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:59,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-14 23:16:59,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2019-10-14 23:16:59,173 INFO L87 Difference]: Start difference. First operand 353 states and 504 transitions. Second operand 18 states. [2019-10-14 23:16:59,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:59,759 INFO L93 Difference]: Finished difference Result 832 states and 1241 transitions. [2019-10-14 23:16:59,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-14 23:16:59,759 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 133 [2019-10-14 23:16:59,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:59,763 INFO L225 Difference]: With dead ends: 832 [2019-10-14 23:16:59,764 INFO L226 Difference]: Without dead ends: 510 [2019-10-14 23:16:59,765 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 [2019-10-14 23:16:59,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2019-10-14 23:16:59,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 376. [2019-10-14 23:16:59,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2019-10-14 23:16:59,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 537 transitions. [2019-10-14 23:16:59,796 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 537 transitions. Word has length 133 [2019-10-14 23:16:59,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:59,797 INFO L462 AbstractCegarLoop]: Abstraction has 376 states and 537 transitions. [2019-10-14 23:16:59,797 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-14 23:16:59,797 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 537 transitions. [2019-10-14 23:16:59,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-10-14 23:16:59,801 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:59,801 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] [2019-10-14 23:17:00,006 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:00,006 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:00,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:00,007 INFO L82 PathProgramCache]: Analyzing trace with hash 994619440, now seen corresponding path program 12 times [2019-10-14 23:17:00,007 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:00,007 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012238317] [2019-10-14 23:17:00,008 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:00,008 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:00,008 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:00,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:00,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:00,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:00,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:00,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:00,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:00,216 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 509 trivial. 0 not checked. [2019-10-14 23:17:00,217 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012238317] [2019-10-14 23:17:00,217 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129323822] [2019-10-14 23:17:00,217 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 [2019-10-14 23:17:00,426 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-10-14 23:17:00,427 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:00,429 INFO L256 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-14 23:17:00,432 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:00,623 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:00,708 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 48 proven. 77 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2019-10-14 23:17:00,708 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:17:00,708 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12] total 28 [2019-10-14 23:17:00,709 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787399976] [2019-10-14 23:17:00,709 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-14 23:17:00,710 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:00,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-14 23:17:00,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=593, Unknown=0, NotChecked=0, Total=756 [2019-10-14 23:17:00,711 INFO L87 Difference]: Start difference. First operand 376 states and 537 transitions. Second operand 28 states. [2019-10-14 23:17:07,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:07,951 INFO L93 Difference]: Finished difference Result 2222 states and 3377 transitions. [2019-10-14 23:17:07,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2019-10-14 23:17:07,952 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 140 [2019-10-14 23:17:07,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:07,964 INFO L225 Difference]: With dead ends: 2222 [2019-10-14 23:17:07,964 INFO L226 Difference]: Without dead ends: 1876 [2019-10-14 23:17:07,971 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 [2019-10-14 23:17:07,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1876 states. [2019-10-14 23:17:08,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1876 to 416. [2019-10-14 23:17:08,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 416 states. [2019-10-14 23:17:08,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 597 transitions. [2019-10-14 23:17:08,028 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 597 transitions. Word has length 140 [2019-10-14 23:17:08,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:08,029 INFO L462 AbstractCegarLoop]: Abstraction has 416 states and 597 transitions. [2019-10-14 23:17:08,029 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-14 23:17:08,029 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 597 transitions. [2019-10-14 23:17:08,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-10-14 23:17:08,031 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:08,032 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] [2019-10-14 23:17:08,235 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:08,236 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:08,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:08,237 INFO L82 PathProgramCache]: Analyzing trace with hash 286872383, now seen corresponding path program 13 times [2019-10-14 23:17:08,237 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:08,237 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851883712] [2019-10-14 23:17:08,237 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:08,238 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:08,238 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:08,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:08,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:08,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:08,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:08,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:08,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:08,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:08,450 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 629 trivial. 0 not checked. [2019-10-14 23:17:08,451 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851883712] [2019-10-14 23:17:08,451 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686503651] [2019-10-14 23:17:08,451 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 [2019-10-14 23:17:08,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:08,609 INFO L256 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-14 23:17:08,612 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:08,668 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 629 trivial. 0 not checked. [2019-10-14 23:17:08,669 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:17:08,669 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 20 [2019-10-14 23:17:08,669 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323845940] [2019-10-14 23:17:08,669 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-14 23:17:08,669 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:08,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-14 23:17:08,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2019-10-14 23:17:08,670 INFO L87 Difference]: Start difference. First operand 416 states and 597 transitions. Second operand 20 states. [2019-10-14 23:17:09,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:09,449 INFO L93 Difference]: Finished difference Result 988 states and 1482 transitions. [2019-10-14 23:17:09,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-14 23:17:09,450 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 156 [2019-10-14 23:17:09,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:09,454 INFO L225 Difference]: With dead ends: 988 [2019-10-14 23:17:09,455 INFO L226 Difference]: Without dead ends: 607 [2019-10-14 23:17:09,456 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 [2019-10-14 23:17:09,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2019-10-14 23:17:09,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 439. [2019-10-14 23:17:09,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 439 states. [2019-10-14 23:17:09,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 630 transitions. [2019-10-14 23:17:09,501 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 630 transitions. Word has length 156 [2019-10-14 23:17:09,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:09,501 INFO L462 AbstractCegarLoop]: Abstraction has 439 states and 630 transitions. [2019-10-14 23:17:09,501 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-14 23:17:09,501 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 630 transitions. [2019-10-14 23:17:09,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-10-14 23:17:09,504 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:09,504 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] [2019-10-14 23:17:09,708 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:09,709 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:09,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:09,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1611539014, now seen corresponding path program 14 times [2019-10-14 23:17:09,709 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:09,710 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259964843] [2019-10-14 23:17:09,710 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:09,710 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:09,710 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:09,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:09,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:09,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:09,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:09,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:09,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:09,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:09,958 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 705 trivial. 0 not checked. [2019-10-14 23:17:09,958 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259964843] [2019-10-14 23:17:09,958 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630972154] [2019-10-14 23:17:09,959 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 [2019-10-14 23:17:10,103 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:17:10,103 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:10,104 INFO L256 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-14 23:17:10,106 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:10,138 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 705 trivial. 0 not checked. [2019-10-14 23:17:10,138 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:17:10,138 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 21 [2019-10-14 23:17:10,139 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619181568] [2019-10-14 23:17:10,139 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-14 23:17:10,139 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:10,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-14 23:17:10,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2019-10-14 23:17:10,140 INFO L87 Difference]: Start difference. First operand 439 states and 630 transitions. Second operand 21 states. [2019-10-14 23:17:11,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:11,052 INFO L93 Difference]: Finished difference Result 1032 states and 1547 transitions. [2019-10-14 23:17:11,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-14 23:17:11,053 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 163 [2019-10-14 23:17:11,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:11,058 INFO L225 Difference]: With dead ends: 1032 [2019-10-14 23:17:11,058 INFO L226 Difference]: Without dead ends: 630 [2019-10-14 23:17:11,060 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 [2019-10-14 23:17:11,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2019-10-14 23:17:11,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 462. [2019-10-14 23:17:11,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 462 states. [2019-10-14 23:17:11,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 663 transitions. [2019-10-14 23:17:11,106 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 663 transitions. Word has length 163 [2019-10-14 23:17:11,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:11,106 INFO L462 AbstractCegarLoop]: Abstraction has 462 states and 663 transitions. [2019-10-14 23:17:11,106 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-14 23:17:11,106 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 663 transitions. [2019-10-14 23:17:11,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-10-14 23:17:11,109 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:11,110 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] [2019-10-14 23:17:11,313 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:11,314 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:11,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:11,314 INFO L82 PathProgramCache]: Analyzing trace with hash -323900957, now seen corresponding path program 15 times [2019-10-14 23:17:11,315 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:11,315 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673247177] [2019-10-14 23:17:11,315 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:11,315 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:11,315 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:11,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:11,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:11,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:11,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:11,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:11,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:11,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:11,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1042 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 786 trivial. 0 not checked. [2019-10-14 23:17:11,640 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673247177] [2019-10-14 23:17:11,640 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124652050] [2019-10-14 23:17:11,640 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 [2019-10-14 23:17:11,781 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-10-14 23:17:11,781 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:11,783 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-14 23:17:11,786 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:11,973 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:12,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1042 backedges. 75 proven. 111 refuted. 0 times theorem prover too weak. 856 trivial. 0 not checked. [2019-10-14 23:17:12,024 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:17:12,025 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 13] total 32 [2019-10-14 23:17:12,025 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071064865] [2019-10-14 23:17:12,025 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-10-14 23:17:12,025 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:12,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-10-14 23:17:12,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=769, Unknown=0, NotChecked=0, Total=992 [2019-10-14 23:17:12,026 INFO L87 Difference]: Start difference. First operand 462 states and 663 transitions. Second operand 32 states.