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/list-properties/list_search-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 19:12:11,902 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 19:12:11,905 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 19:12:11,923 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 19:12:11,924 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 19:12:11,926 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 19:12:11,928 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 19:12:11,937 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 19:12:11,941 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 19:12:11,944 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 19:12:11,946 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 19:12:11,948 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 19:12:11,948 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 19:12:11,950 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 19:12:11,952 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 19:12:11,953 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 19:12:11,955 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 19:12:11,956 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 19:12:11,957 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 19:12:11,962 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 19:12:11,967 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 19:12:11,970 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 19:12:11,973 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 19:12:11,974 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 19:12:11,977 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 19:12:11,978 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 19:12:11,978 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 19:12:11,980 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 19:12:11,981 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 19:12:11,982 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 19:12:11,982 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 19:12:11,984 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 19:12:11,985 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 19:12:11,986 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 19:12:11,987 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 19:12:11,987 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 19:12:11,988 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 19:12:11,988 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 19:12:11,988 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 19:12:11,989 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 19:12:11,990 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 19:12:11,991 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 19:12:12,023 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 19:12:12,024 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 19:12:12,025 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 19:12:12,029 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 19:12:12,029 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 19:12:12,032 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 19:12:12,032 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 19:12:12,032 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 19:12:12,033 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 19:12:12,033 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 19:12:12,033 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 19:12:12,033 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 19:12:12,033 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 19:12:12,034 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 19:12:12,034 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 19:12:12,034 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 19:12:12,034 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 19:12:12,035 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 19:12:12,035 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 19:12:12,035 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 19:12:12,035 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 19:12:12,035 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 19:12:12,036 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 19:12:12,036 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 19:12:12,036 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 19:12:12,038 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 19:12:12,039 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 19:12:12,039 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 19:12:12,039 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 19:12:12,340 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 19:12:12,353 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 19:12:12,357 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 19:12:12,358 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 19:12:12,359 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 19:12:12,360 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/list_search-2.i [2019-10-13 19:12:12,421 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09582755a/35a5a8e1b6644874af40419f97e13874/FLAG66aeaf7ab [2019-10-13 19:12:12,984 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 19:12:12,985 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-properties/list_search-2.i [2019-10-13 19:12:13,001 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09582755a/35a5a8e1b6644874af40419f97e13874/FLAG66aeaf7ab [2019-10-13 19:12:13,257 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09582755a/35a5a8e1b6644874af40419f97e13874 [2019-10-13 19:12:13,268 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 19:12:13,270 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 19:12:13,271 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 19:12:13,271 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 19:12:13,275 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 19:12:13,276 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:12:13" (1/1) ... [2019-10-13 19:12:13,279 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d4fe27d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:12:13, skipping insertion in model container [2019-10-13 19:12:13,280 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:12:13" (1/1) ... [2019-10-13 19:12:13,288 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 19:12:13,368 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 19:12:14,069 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:12:14,079 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 19:12:14,123 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:12:14,236 INFO L192 MainTranslator]: Completed translation [2019-10-13 19:12:14,237 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:12:14 WrapperNode [2019-10-13 19:12:14,238 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 19:12:14,238 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 19:12:14,239 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 19:12:14,239 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 19:12:14,253 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:12:14" (1/1) ... [2019-10-13 19:12:14,254 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:12:14" (1/1) ... [2019-10-13 19:12:14,276 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:12:14" (1/1) ... [2019-10-13 19:12:14,277 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:12:14" (1/1) ... [2019-10-13 19:12:14,299 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:12:14" (1/1) ... [2019-10-13 19:12:14,306 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:12:14" (1/1) ... [2019-10-13 19:12:14,316 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:12:14" (1/1) ... [2019-10-13 19:12:14,326 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 19:12:14,326 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 19:12:14,327 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 19:12:14,327 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 19:12:14,328 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:12:14" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 19:12:14,406 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 19:12:14,406 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 19:12:14,407 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 19:12:14,407 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-10-13 19:12:14,407 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-10-13 19:12:14,407 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2019-10-13 19:12:14,408 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2019-10-13 19:12:14,408 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2019-10-13 19:12:14,408 INFO L138 BoogieDeclarations]: Found implementation of procedure search_list [2019-10-13 19:12:14,408 INFO L138 BoogieDeclarations]: Found implementation of procedure delete_list [2019-10-13 19:12:14,409 INFO L138 BoogieDeclarations]: Found implementation of procedure insert_list [2019-10-13 19:12:14,409 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 19:12:14,409 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 19:12:14,409 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 19:12:14,410 INFO L130 BoogieDeclarations]: Found specification of procedure __underflow [2019-10-13 19:12:14,410 INFO L130 BoogieDeclarations]: Found specification of procedure __uflow [2019-10-13 19:12:14,410 INFO L130 BoogieDeclarations]: Found specification of procedure __overflow [2019-10-13 19:12:14,410 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_getc [2019-10-13 19:12:14,411 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_putc [2019-10-13 19:12:14,411 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_feof [2019-10-13 19:12:14,411 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_ferror [2019-10-13 19:12:14,411 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_peekc_locked [2019-10-13 19:12:14,412 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_flockfile [2019-10-13 19:12:14,412 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_funlockfile [2019-10-13 19:12:14,412 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_ftrylockfile [2019-10-13 19:12:14,412 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_vfscanf [2019-10-13 19:12:14,412 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_vfprintf [2019-10-13 19:12:14,413 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_padn [2019-10-13 19:12:14,413 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_sgetn [2019-10-13 19:12:14,413 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_seekoff [2019-10-13 19:12:14,413 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_seekpos [2019-10-13 19:12:14,413 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_free_backup_area [2019-10-13 19:12:14,413 INFO L130 BoogieDeclarations]: Found specification of procedure remove [2019-10-13 19:12:14,414 INFO L130 BoogieDeclarations]: Found specification of procedure rename [2019-10-13 19:12:14,414 INFO L130 BoogieDeclarations]: Found specification of procedure renameat [2019-10-13 19:12:14,414 INFO L130 BoogieDeclarations]: Found specification of procedure tmpfile [2019-10-13 19:12:14,414 INFO L130 BoogieDeclarations]: Found specification of procedure tmpnam [2019-10-13 19:12:14,414 INFO L130 BoogieDeclarations]: Found specification of procedure tmpnam_r [2019-10-13 19:12:14,415 INFO L130 BoogieDeclarations]: Found specification of procedure tempnam [2019-10-13 19:12:14,415 INFO L130 BoogieDeclarations]: Found specification of procedure fclose [2019-10-13 19:12:14,415 INFO L130 BoogieDeclarations]: Found specification of procedure fflush [2019-10-13 19:12:14,415 INFO L130 BoogieDeclarations]: Found specification of procedure fflush_unlocked [2019-10-13 19:12:14,415 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2019-10-13 19:12:14,415 INFO L130 BoogieDeclarations]: Found specification of procedure freopen [2019-10-13 19:12:14,416 INFO L130 BoogieDeclarations]: Found specification of procedure fdopen [2019-10-13 19:12:14,416 INFO L130 BoogieDeclarations]: Found specification of procedure fmemopen [2019-10-13 19:12:14,416 INFO L130 BoogieDeclarations]: Found specification of procedure open_memstream [2019-10-13 19:12:14,416 INFO L130 BoogieDeclarations]: Found specification of procedure setbuf [2019-10-13 19:12:14,416 INFO L130 BoogieDeclarations]: Found specification of procedure setvbuf [2019-10-13 19:12:14,417 INFO L130 BoogieDeclarations]: Found specification of procedure setbuffer [2019-10-13 19:12:14,417 INFO L130 BoogieDeclarations]: Found specification of procedure setlinebuf [2019-10-13 19:12:14,417 INFO L130 BoogieDeclarations]: Found specification of procedure fprintf [2019-10-13 19:12:14,417 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-13 19:12:14,417 INFO L130 BoogieDeclarations]: Found specification of procedure sprintf [2019-10-13 19:12:14,417 INFO L130 BoogieDeclarations]: Found specification of procedure vfprintf [2019-10-13 19:12:14,418 INFO L130 BoogieDeclarations]: Found specification of procedure vprintf [2019-10-13 19:12:14,418 INFO L130 BoogieDeclarations]: Found specification of procedure vsprintf [2019-10-13 19:12:14,418 INFO L130 BoogieDeclarations]: Found specification of procedure snprintf [2019-10-13 19:12:14,418 INFO L130 BoogieDeclarations]: Found specification of procedure vsnprintf [2019-10-13 19:12:14,418 INFO L130 BoogieDeclarations]: Found specification of procedure vdprintf [2019-10-13 19:12:14,418 INFO L130 BoogieDeclarations]: Found specification of procedure dprintf [2019-10-13 19:12:14,419 INFO L130 BoogieDeclarations]: Found specification of procedure fscanf [2019-10-13 19:12:14,419 INFO L130 BoogieDeclarations]: Found specification of procedure scanf [2019-10-13 19:12:14,419 INFO L130 BoogieDeclarations]: Found specification of procedure sscanf [2019-10-13 19:12:14,419 INFO L130 BoogieDeclarations]: Found specification of procedure vfscanf [2019-10-13 19:12:14,419 INFO L130 BoogieDeclarations]: Found specification of procedure vscanf [2019-10-13 19:12:14,420 INFO L130 BoogieDeclarations]: Found specification of procedure vsscanf [2019-10-13 19:12:14,420 INFO L130 BoogieDeclarations]: Found specification of procedure fgetc [2019-10-13 19:12:14,420 INFO L130 BoogieDeclarations]: Found specification of procedure getc [2019-10-13 19:12:14,420 INFO L130 BoogieDeclarations]: Found specification of procedure getchar [2019-10-13 19:12:14,420 INFO L130 BoogieDeclarations]: Found specification of procedure getc_unlocked [2019-10-13 19:12:14,423 INFO L130 BoogieDeclarations]: Found specification of procedure getchar_unlocked [2019-10-13 19:12:14,423 INFO L130 BoogieDeclarations]: Found specification of procedure fgetc_unlocked [2019-10-13 19:12:14,423 INFO L130 BoogieDeclarations]: Found specification of procedure fputc [2019-10-13 19:12:14,424 INFO L130 BoogieDeclarations]: Found specification of procedure putc [2019-10-13 19:12:14,424 INFO L130 BoogieDeclarations]: Found specification of procedure putchar [2019-10-13 19:12:14,425 INFO L130 BoogieDeclarations]: Found specification of procedure fputc_unlocked [2019-10-13 19:12:14,425 INFO L130 BoogieDeclarations]: Found specification of procedure putc_unlocked [2019-10-13 19:12:14,425 INFO L130 BoogieDeclarations]: Found specification of procedure putchar_unlocked [2019-10-13 19:12:14,426 INFO L130 BoogieDeclarations]: Found specification of procedure getw [2019-10-13 19:12:14,426 INFO L130 BoogieDeclarations]: Found specification of procedure putw [2019-10-13 19:12:14,426 INFO L130 BoogieDeclarations]: Found specification of procedure fgets [2019-10-13 19:12:14,426 INFO L130 BoogieDeclarations]: Found specification of procedure __getdelim [2019-10-13 19:12:14,426 INFO L130 BoogieDeclarations]: Found specification of procedure getdelim [2019-10-13 19:12:14,427 INFO L130 BoogieDeclarations]: Found specification of procedure getline [2019-10-13 19:12:14,427 INFO L130 BoogieDeclarations]: Found specification of procedure fputs [2019-10-13 19:12:14,427 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2019-10-13 19:12:14,427 INFO L130 BoogieDeclarations]: Found specification of procedure ungetc [2019-10-13 19:12:14,427 INFO L130 BoogieDeclarations]: Found specification of procedure fread [2019-10-13 19:12:14,428 INFO L130 BoogieDeclarations]: Found specification of procedure fwrite [2019-10-13 19:12:14,428 INFO L130 BoogieDeclarations]: Found specification of procedure fread_unlocked [2019-10-13 19:12:14,428 INFO L130 BoogieDeclarations]: Found specification of procedure fwrite_unlocked [2019-10-13 19:12:14,428 INFO L130 BoogieDeclarations]: Found specification of procedure fseek [2019-10-13 19:12:14,428 INFO L130 BoogieDeclarations]: Found specification of procedure ftell [2019-10-13 19:12:14,429 INFO L130 BoogieDeclarations]: Found specification of procedure rewind [2019-10-13 19:12:14,429 INFO L130 BoogieDeclarations]: Found specification of procedure fseeko [2019-10-13 19:12:14,429 INFO L130 BoogieDeclarations]: Found specification of procedure ftello [2019-10-13 19:12:14,429 INFO L130 BoogieDeclarations]: Found specification of procedure fgetpos [2019-10-13 19:12:14,429 INFO L130 BoogieDeclarations]: Found specification of procedure fsetpos [2019-10-13 19:12:14,429 INFO L130 BoogieDeclarations]: Found specification of procedure clearerr [2019-10-13 19:12:14,430 INFO L130 BoogieDeclarations]: Found specification of procedure feof [2019-10-13 19:12:14,430 INFO L130 BoogieDeclarations]: Found specification of procedure ferror [2019-10-13 19:12:14,430 INFO L130 BoogieDeclarations]: Found specification of procedure clearerr_unlocked [2019-10-13 19:12:14,430 INFO L130 BoogieDeclarations]: Found specification of procedure feof_unlocked [2019-10-13 19:12:14,430 INFO L130 BoogieDeclarations]: Found specification of procedure ferror_unlocked [2019-10-13 19:12:14,431 INFO L130 BoogieDeclarations]: Found specification of procedure perror [2019-10-13 19:12:14,431 INFO L130 BoogieDeclarations]: Found specification of procedure fileno [2019-10-13 19:12:14,431 INFO L130 BoogieDeclarations]: Found specification of procedure fileno_unlocked [2019-10-13 19:12:14,431 INFO L130 BoogieDeclarations]: Found specification of procedure popen [2019-10-13 19:12:14,431 INFO L130 BoogieDeclarations]: Found specification of procedure pclose [2019-10-13 19:12:14,432 INFO L130 BoogieDeclarations]: Found specification of procedure ctermid [2019-10-13 19:12:14,432 INFO L130 BoogieDeclarations]: Found specification of procedure flockfile [2019-10-13 19:12:14,432 INFO L130 BoogieDeclarations]: Found specification of procedure ftrylockfile [2019-10-13 19:12:14,432 INFO L130 BoogieDeclarations]: Found specification of procedure funlockfile [2019-10-13 19:12:14,432 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-10-13 19:12:14,432 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-10-13 19:12:14,433 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-10-13 19:12:14,433 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-10-13 19:12:14,433 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-10-13 19:12:14,433 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-10-13 19:12:14,433 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-10-13 19:12:14,434 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-10-13 19:12:14,434 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-10-13 19:12:14,434 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-10-13 19:12:14,434 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-10-13 19:12:14,434 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-10-13 19:12:14,435 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-10-13 19:12:14,435 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-10-13 19:12:14,435 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-10-13 19:12:14,435 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-10-13 19:12:14,435 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-10-13 19:12:14,435 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-10-13 19:12:14,436 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2019-10-13 19:12:14,436 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2019-10-13 19:12:14,436 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2019-10-13 19:12:14,436 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-10-13 19:12:14,436 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-10-13 19:12:14,437 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-10-13 19:12:14,437 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-10-13 19:12:14,437 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-10-13 19:12:14,437 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-10-13 19:12:14,437 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-10-13 19:12:14,438 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-10-13 19:12:14,438 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-10-13 19:12:14,438 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-10-13 19:12:14,438 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-10-13 19:12:14,438 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-10-13 19:12:14,439 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-10-13 19:12:14,439 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-10-13 19:12:14,439 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-10-13 19:12:14,439 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-10-13 19:12:14,440 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-10-13 19:12:14,440 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-10-13 19:12:14,440 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-10-13 19:12:14,440 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-10-13 19:12:14,440 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-10-13 19:12:14,440 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-10-13 19:12:14,441 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-10-13 19:12:14,441 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-10-13 19:12:14,441 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-10-13 19:12:14,441 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-10-13 19:12:14,441 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-10-13 19:12:14,441 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-10-13 19:12:14,442 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-10-13 19:12:14,442 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-10-13 19:12:14,442 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-10-13 19:12:14,442 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-10-13 19:12:14,442 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-10-13 19:12:14,442 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-10-13 19:12:14,443 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 19:12:14,443 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-10-13 19:12:14,443 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-10-13 19:12:14,443 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 19:12:14,443 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-10-13 19:12:14,443 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-10-13 19:12:14,444 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-10-13 19:12:14,444 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-10-13 19:12:14,444 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-10-13 19:12:14,444 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-10-13 19:12:14,444 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-10-13 19:12:14,445 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-10-13 19:12:14,445 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 19:12:14,445 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-10-13 19:12:14,445 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-10-13 19:12:14,445 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-10-13 19:12:14,445 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-10-13 19:12:14,446 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-10-13 19:12:14,446 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-10-13 19:12:14,446 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-10-13 19:12:14,446 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-10-13 19:12:14,446 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-10-13 19:12:14,446 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-10-13 19:12:14,447 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-10-13 19:12:14,447 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-10-13 19:12:14,447 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-10-13 19:12:14,447 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-10-13 19:12:14,447 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-10-13 19:12:14,447 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-10-13 19:12:14,448 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-10-13 19:12:14,448 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-10-13 19:12:14,448 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-10-13 19:12:14,448 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-10-13 19:12:14,448 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-10-13 19:12:14,448 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-10-13 19:12:14,449 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-10-13 19:12:14,449 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-10-13 19:12:14,449 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-10-13 19:12:14,449 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-10-13 19:12:14,449 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-10-13 19:12:14,450 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-10-13 19:12:14,450 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-10-13 19:12:14,450 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-10-13 19:12:14,450 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-10-13 19:12:14,450 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-10-13 19:12:14,450 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-10-13 19:12:14,451 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-10-13 19:12:14,451 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-10-13 19:12:14,451 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-10-13 19:12:14,451 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-10-13 19:12:14,451 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-10-13 19:12:14,452 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-10-13 19:12:14,452 INFO L130 BoogieDeclarations]: Found specification of procedure search_list [2019-10-13 19:12:14,452 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 19:12:14,452 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 19:12:14,452 INFO L130 BoogieDeclarations]: Found specification of procedure delete_list [2019-10-13 19:12:14,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 19:12:14,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 19:12:14,453 INFO L130 BoogieDeclarations]: Found specification of procedure insert_list [2019-10-13 19:12:14,453 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 19:12:14,453 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 19:12:14,453 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 19:12:14,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 19:12:14,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 19:12:15,119 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 19:12:15,120 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-13 19:12:15,121 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:12:15 BoogieIcfgContainer [2019-10-13 19:12:15,121 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 19:12:15,122 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 19:12:15,122 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 19:12:15,125 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 19:12:15,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:12:13" (1/3) ... [2019-10-13 19:12:15,127 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59f5ea68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:12:15, skipping insertion in model container [2019-10-13 19:12:15,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:12:14" (2/3) ... [2019-10-13 19:12:15,127 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59f5ea68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:12:15, skipping insertion in model container [2019-10-13 19:12:15,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:12:15" (3/3) ... [2019-10-13 19:12:15,129 INFO L109 eAbstractionObserver]: Analyzing ICFG list_search-2.i [2019-10-13 19:12:15,139 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 19:12:15,147 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 19:12:15,158 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 19:12:15,181 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 19:12:15,181 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 19:12:15,181 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 19:12:15,181 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 19:12:15,182 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 19:12:15,182 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 19:12:15,182 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 19:12:15,182 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 19:12:15,196 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states. [2019-10-13 19:12:15,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-13 19:12:15,203 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:12:15,204 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:12:15,205 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:12:15,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:12:15,212 INFO L82 PathProgramCache]: Analyzing trace with hash 694957185, now seen corresponding path program 1 times [2019-10-13 19:12:15,221 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:12:15,221 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068324569] [2019-10-13 19:12:15,222 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:12:15,222 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:12:15,222 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:12:15,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:15,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:15,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:15,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:15,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:15,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:15,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:15,644 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-13 19:12:15,645 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068324569] [2019-10-13 19:12:15,646 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:12:15,646 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 19:12:15,647 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720324672] [2019-10-13 19:12:15,654 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 19:12:15,655 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:12:15,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 19:12:15,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:12:15,673 INFO L87 Difference]: Start difference. First operand 52 states. Second operand 4 states. [2019-10-13 19:12:15,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:12:15,879 INFO L93 Difference]: Finished difference Result 85 states and 110 transitions. [2019-10-13 19:12:15,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 19:12:15,881 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 46 [2019-10-13 19:12:15,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:12:15,890 INFO L225 Difference]: With dead ends: 85 [2019-10-13 19:12:15,891 INFO L226 Difference]: Without dead ends: 34 [2019-10-13 19:12:15,894 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 19:12:15,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-13 19:12:15,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-10-13 19:12:15,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-13 19:12:15,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2019-10-13 19:12:15,943 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 46 [2019-10-13 19:12:15,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:12:15,945 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2019-10-13 19:12:15,945 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 19:12:15,945 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2019-10-13 19:12:15,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-10-13 19:12:15,948 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:12:15,948 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:12:15,949 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:12:15,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:12:15,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1251884926, now seen corresponding path program 1 times [2019-10-13 19:12:15,949 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:12:15,950 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353183099] [2019-10-13 19:12:15,950 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:12:15,950 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:12:15,950 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:12:16,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:16,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:16,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:16,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:16,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:16,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:16,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:16,263 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 19:12:16,263 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353183099] [2019-10-13 19:12:16,264 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:12:16,264 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 19:12:16,264 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274519679] [2019-10-13 19:12:16,266 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 19:12:16,266 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:12:16,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 19:12:16,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 19:12:16,267 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 7 states. [2019-10-13 19:12:16,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:12:16,567 INFO L93 Difference]: Finished difference Result 63 states and 78 transitions. [2019-10-13 19:12:16,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 19:12:16,568 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 48 [2019-10-13 19:12:16,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:12:16,570 INFO L225 Difference]: With dead ends: 63 [2019-10-13 19:12:16,570 INFO L226 Difference]: Without dead ends: 38 [2019-10-13 19:12:16,571 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-10-13 19:12:16,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-13 19:12:16,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2019-10-13 19:12:16,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-13 19:12:16,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2019-10-13 19:12:16,581 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 48 [2019-10-13 19:12:16,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:12:16,582 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2019-10-13 19:12:16,582 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 19:12:16,582 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2019-10-13 19:12:16,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-10-13 19:12:16,583 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:12:16,584 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:12:16,584 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:12:16,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:12:16,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1415498856, now seen corresponding path program 1 times [2019-10-13 19:12:16,585 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:12:16,585 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425036386] [2019-10-13 19:12:16,585 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:12:16,585 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:12:16,586 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:12:16,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:16,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:16,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:16,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:16,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:16,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:16,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:17,050 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 19:12:17,051 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425036386] [2019-10-13 19:12:17,051 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:12:17,051 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2019-10-13 19:12:17,051 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214668330] [2019-10-13 19:12:17,052 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 19:12:17,052 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:12:17,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 19:12:17,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2019-10-13 19:12:17,054 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 12 states. [2019-10-13 19:12:17,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:12:17,751 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2019-10-13 19:12:17,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 19:12:17,752 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2019-10-13 19:12:17,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:12:17,758 INFO L225 Difference]: With dead ends: 55 [2019-10-13 19:12:17,758 INFO L226 Difference]: Without dead ends: 46 [2019-10-13 19:12:17,759 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2019-10-13 19:12:17,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-13 19:12:17,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2019-10-13 19:12:17,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-13 19:12:17,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2019-10-13 19:12:17,769 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 49 [2019-10-13 19:12:17,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:12:17,770 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2019-10-13 19:12:17,770 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 19:12:17,770 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2019-10-13 19:12:17,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-10-13 19:12:17,772 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:12:17,772 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:12:17,772 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:12:17,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:12:17,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1022471846, now seen corresponding path program 1 times [2019-10-13 19:12:17,773 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:12:17,773 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760394753] [2019-10-13 19:12:17,774 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:12:17,774 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:12:17,774 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:12:17,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:17,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:17,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:17,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:17,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:17,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:17,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:17,941 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 19:12:17,941 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760394753] [2019-10-13 19:12:17,942 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:12:17,942 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-10-13 19:12:17,942 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314244393] [2019-10-13 19:12:17,943 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 19:12:17,943 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:12:17,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 19:12:17,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-10-13 19:12:17,944 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand 9 states. [2019-10-13 19:12:18,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:12:18,326 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2019-10-13 19:12:18,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 19:12:18,328 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2019-10-13 19:12:18,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:12:18,329 INFO L225 Difference]: With dead ends: 53 [2019-10-13 19:12:18,329 INFO L226 Difference]: Without dead ends: 41 [2019-10-13 19:12:18,331 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2019-10-13 19:12:18,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-13 19:12:18,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2019-10-13 19:12:18,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-13 19:12:18,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2019-10-13 19:12:18,344 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 49 [2019-10-13 19:12:18,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:12:18,345 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2019-10-13 19:12:18,345 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 19:12:18,345 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2019-10-13 19:12:18,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-13 19:12:18,350 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:12:18,350 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:12:18,350 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:12:18,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:12:18,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1923734059, now seen corresponding path program 1 times [2019-10-13 19:12:18,351 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:12:18,351 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4668208] [2019-10-13 19:12:18,351 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:12:18,351 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:12:18,351 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:12:18,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:18,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:18,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:18,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:18,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:18,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:18,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:18,595 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 19:12:18,596 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4668208] [2019-10-13 19:12:18,596 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338799756] [2019-10-13 19:12:18,597 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:12:18,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:18,791 INFO L256 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-13 19:12:18,803 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:12:18,903 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 19:12:18,904 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:12:18,904 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 15 [2019-10-13 19:12:18,905 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497492694] [2019-10-13 19:12:18,905 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 19:12:18,906 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:12:18,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 19:12:18,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2019-10-13 19:12:18,907 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 5 states. [2019-10-13 19:12:19,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:12:19,033 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2019-10-13 19:12:19,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 19:12:19,034 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 52 [2019-10-13 19:12:19,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:12:19,035 INFO L225 Difference]: With dead ends: 74 [2019-10-13 19:12:19,035 INFO L226 Difference]: Without dead ends: 43 [2019-10-13 19:12:19,036 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2019-10-13 19:12:19,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-13 19:12:19,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-10-13 19:12:19,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-13 19:12:19,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2019-10-13 19:12:19,044 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 52 [2019-10-13 19:12:19,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:12:19,045 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2019-10-13 19:12:19,045 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 19:12:19,045 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2019-10-13 19:12:19,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-13 19:12:19,046 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:12:19,046 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:12:19,261 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:12:19,262 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:12:19,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:12:19,263 INFO L82 PathProgramCache]: Analyzing trace with hash 125653783, now seen corresponding path program 1 times [2019-10-13 19:12:19,263 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:12:19,263 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867653990] [2019-10-13 19:12:19,264 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:12:19,264 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:12:19,264 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:12:19,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:19,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:19,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:19,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:19,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:19,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:19,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:19,522 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 19:12:19,522 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867653990] [2019-10-13 19:12:19,522 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970980679] [2019-10-13 19:12:19,523 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:12:19,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:19,702 INFO L256 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 28 conjunts are in the unsatisfiable core [2019-10-13 19:12:19,706 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:12:19,777 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-10-13 19:12:19,778 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 19:12:19,781 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:12:19,781 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 19:12:19,781 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2019-10-13 19:12:19,837 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 19:12:19,838 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:12:19,838 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 15 [2019-10-13 19:12:19,838 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770153003] [2019-10-13 19:12:19,839 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-13 19:12:19,839 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:12:19,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-13 19:12:19,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2019-10-13 19:12:19,840 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 15 states. [2019-10-13 19:12:20,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:12:20,320 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2019-10-13 19:12:20,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 19:12:20,321 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 52 [2019-10-13 19:12:20,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:12:20,322 INFO L225 Difference]: With dead ends: 53 [2019-10-13 19:12:20,322 INFO L226 Difference]: Without dead ends: 44 [2019-10-13 19:12:20,323 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2019-10-13 19:12:20,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-13 19:12:20,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2019-10-13 19:12:20,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-13 19:12:20,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2019-10-13 19:12:20,330 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 52 [2019-10-13 19:12:20,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:12:20,331 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2019-10-13 19:12:20,331 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-13 19:12:20,331 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2019-10-13 19:12:20,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-13 19:12:20,332 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:12:20,332 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:12:20,536 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:12:20,537 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:12:20,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:12:20,538 INFO L82 PathProgramCache]: Analyzing trace with hash -267373227, now seen corresponding path program 1 times [2019-10-13 19:12:20,538 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:12:20,538 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842170173] [2019-10-13 19:12:20,539 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:12:20,539 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:12:20,539 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:12:20,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:20,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:20,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:20,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:20,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:20,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:20,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:20,782 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-13 19:12:20,783 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842170173] [2019-10-13 19:12:20,783 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460861139] [2019-10-13 19:12:20,783 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:12:20,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:20,950 INFO L256 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 30 conjunts are in the unsatisfiable core [2019-10-13 19:12:20,960 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:12:21,033 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:12:21,052 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2019-10-13 19:12:21,052 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 19:12:21,060 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2019-10-13 19:12:21,060 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-13 19:12:21,085 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:12:21,087 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2019-10-13 19:12:21,087 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:23 [2019-10-13 19:12:21,203 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-13 19:12:21,206 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:12:21,206 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 11 [2019-10-13 19:12:21,208 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 19:12:21,212 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:12:21,212 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 19:12:21,212 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:8 [2019-10-13 19:12:21,239 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 19:12:21,239 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:12:21,240 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2019-10-13 19:12:21,240 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285077222] [2019-10-13 19:12:21,241 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-13 19:12:21,241 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:12:21,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-13 19:12:21,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2019-10-13 19:12:21,243 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 20 states. [2019-10-13 19:12:22,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:12:22,166 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2019-10-13 19:12:22,166 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-13 19:12:22,167 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 52 [2019-10-13 19:12:22,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:12:22,168 INFO L225 Difference]: With dead ends: 64 [2019-10-13 19:12:22,168 INFO L226 Difference]: Without dead ends: 47 [2019-10-13 19:12:22,169 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=224, Invalid=1036, Unknown=0, NotChecked=0, Total=1260 [2019-10-13 19:12:22,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-13 19:12:22,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2019-10-13 19:12:22,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-13 19:12:22,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2019-10-13 19:12:22,177 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 52 [2019-10-13 19:12:22,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:12:22,177 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2019-10-13 19:12:22,177 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-13 19:12:22,177 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2019-10-13 19:12:22,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-10-13 19:12:22,178 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:12:22,179 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:12:22,387 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:12:22,388 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:12:22,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:12:22,388 INFO L82 PathProgramCache]: Analyzing trace with hash 740526843, now seen corresponding path program 2 times [2019-10-13 19:12:22,389 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:12:22,389 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48679991] [2019-10-13 19:12:22,389 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:12:22,390 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:12:22,390 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:12:22,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:22,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:22,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:22,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:22,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:22,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:22,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:22,732 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-13 19:12:22,732 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48679991] [2019-10-13 19:12:22,732 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095345660] [2019-10-13 19:12:22,732 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:12:22,954 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 19:12:22,954 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:12:22,955 INFO L256 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 28 conjunts are in the unsatisfiable core [2019-10-13 19:12:22,966 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:12:23,004 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-10-13 19:12:23,005 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 19:12:23,010 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:12:23,010 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 19:12:23,010 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:13 [2019-10-13 19:12:23,128 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 19:12:23,128 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:12:23,129 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 19 [2019-10-13 19:12:23,129 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385008218] [2019-10-13 19:12:23,129 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-13 19:12:23,130 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:12:23,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-13 19:12:23,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2019-10-13 19:12:23,130 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 19 states. [2019-10-13 19:12:23,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:12:23,967 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2019-10-13 19:12:23,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-13 19:12:23,967 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 53 [2019-10-13 19:12:23,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:12:23,968 INFO L225 Difference]: With dead ends: 64 [2019-10-13 19:12:23,969 INFO L226 Difference]: Without dead ends: 51 [2019-10-13 19:12:23,970 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=207, Invalid=1053, Unknown=0, NotChecked=0, Total=1260 [2019-10-13 19:12:23,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-10-13 19:12:23,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2019-10-13 19:12:23,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-13 19:12:23,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2019-10-13 19:12:23,978 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 53 [2019-10-13 19:12:23,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:12:23,978 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2019-10-13 19:12:23,978 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-13 19:12:23,979 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2019-10-13 19:12:23,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-13 19:12:23,982 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:12:23,983 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:12:24,184 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:12:24,189 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:12:24,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:12:24,190 INFO L82 PathProgramCache]: Analyzing trace with hash -784314466, now seen corresponding path program 3 times [2019-10-13 19:12:24,190 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:12:24,190 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151457736] [2019-10-13 19:12:24,190 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:12:24,191 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:12:24,191 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:12:24,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:24,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:24,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:24,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:24,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:24,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:24,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:12:24,944 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 19:12:24,944 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151457736] [2019-10-13 19:12:24,945 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019442701] [2019-10-13 19:12:24,945 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:12:25,123 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-13 19:12:25,124 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:12:25,126 INFO L256 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 68 conjunts are in the unsatisfiable core [2019-10-13 19:12:25,133 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:12:25,145 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-10-13 19:12:25,145 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 19:12:25,153 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:12:25,153 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-13 19:12:25,154 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-10-13 19:12:25,184 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:12:25,195 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2019-10-13 19:12:25,195 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 19:12:25,205 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2019-10-13 19:12:25,205 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-13 19:12:25,238 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:12:25,245 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2019-10-13 19:12:25,245 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-10-13 19:12:25,257 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2019-10-13 19:12:25,257 INFO L496 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-10-13 19:12:25,279 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:12:25,280 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 2 xjuncts. [2019-10-13 19:12:25,281 INFO L221 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:79, output treesize:39 [2019-10-13 19:12:25,505 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-13 19:12:25,517 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:12:25,520 INFO L496 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-13 19:12:25,530 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:12:25,531 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-10-13 19:12:25,531 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:65, output treesize:41 [2019-10-13 19:12:30,050 WARN L191 SmtUtils]: Spent 1.64 s on a formula simplification that was a NOOP. DAG size: 30 [2019-10-13 19:12:31,836 WARN L191 SmtUtils]: Spent 1.72 s on a formula simplification that was a NOOP. DAG size: 30 [2019-10-13 19:12:31,840 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:12:31,865 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:12:31,866 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 58 [2019-10-13 19:12:31,867 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 19:12:31,915 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:12:31,930 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:12:31,931 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 58 [2019-10-13 19:12:31,932 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-13 19:12:31,976 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:12:31,979 INFO L392 ElimStorePlain]: Different costs {0=[|v_old(#memory_$Pointer$.base)_AFTER_CALL_20|, v_prenex_4], 4=[v_prenex_3, |v_old(#memory_$Pointer$.offset)_AFTER_CALL_20|]} [2019-10-13 19:12:31,992 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 19:12:31,997 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 48 [2019-10-13 19:12:31,998 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-10-13 19:12:32,041 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:12:32,048 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 19:12:32,052 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 48 [2019-10-13 19:12:32,053 INFO L496 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-10-13 19:12:32,091 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:12:32,098 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 19:12:32,104 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 51 [2019-10-13 19:12:32,104 INFO L496 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-10-13 19:12:32,141 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:12:32,152 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 19:12:32,163 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 51 [2019-10-13 19:12:32,164 INFO L496 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-10-13 19:12:32,230 INFO L567 ElimStorePlain]: treesize reduction 4, result has 95.9 percent of original size [2019-10-13 19:12:32,231 INFO L496 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, 4 dim-2 vars, End of recursive call: and 2 xjuncts. [2019-10-13 19:12:32,232 INFO L221 ElimStorePlain]: Needed 7 recursive calls to eliminate 12 variables, input treesize:109, output treesize:65 [2019-10-13 19:12:32,940 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-13 19:12:32,941 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:12:32,941 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 18] total 39 [2019-10-13 19:12:32,941 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386769449] [2019-10-13 19:12:32,942 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-10-13 19:12:32,942 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:12:32,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-10-13 19:12:32,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1368, Unknown=3, NotChecked=0, Total=1482 [2019-10-13 19:12:32,943 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 39 states. [2019-10-13 19:12:36,128 WARN L191 SmtUtils]: Spent 2.93 s on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2019-10-13 19:12:43,954 WARN L191 SmtUtils]: Spent 7.77 s on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2019-10-13 19:12:47,081 WARN L191 SmtUtils]: Spent 3.07 s on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2019-10-13 19:12:51,122 WARN L191 SmtUtils]: Spent 3.87 s on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2019-10-13 19:12:58,920 WARN L191 SmtUtils]: Spent 7.74 s on a formula simplification. DAG size of input: 77 DAG size of output: 62