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 0.1.24-13a467a-m [2019-10-14 23:11:12,323 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:11:12,326 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:11:12,346 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:11:12,346 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:11:12,348 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:11:12,350 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:11:12,364 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:11:12,365 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:11:12,366 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:11:12,370 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:11:12,372 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:11:12,373 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:11:12,376 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:11:12,379 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:11:12,381 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:11:12,383 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:11:12,386 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:11:12,388 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:11:12,392 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:11:12,394 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:11:12,395 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:11:12,396 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:11:12,397 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:11:12,399 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 23:11:12,399 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 23:11:12,399 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 23:11:12,400 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 23:11:12,401 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 23:11:12,402 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 23:11:12,402 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:11:12,403 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:11:12,404 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:11:12,405 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:11:12,406 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:11:12,406 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:11:12,407 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:11:12,407 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:11:12,407 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:11:12,408 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:11:12,409 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:11:12,410 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 23:11:12,424 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:11:12,424 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:11:12,426 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:11:12,426 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:11:12,426 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:11:12,426 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:11:12,427 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:11:12,427 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:11:12,427 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:11:12,427 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:11:12,427 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:11:12,428 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:11:12,428 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:11:12,428 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:11:12,428 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:11:12,428 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:11:12,429 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:11:12,429 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:11:12,429 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:11:12,429 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:11:12,429 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:11:12,430 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:11:12,430 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:11:12,430 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:11:12,430 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:11:12,430 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:11:12,431 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:11:12,431 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:11:12,431 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:11:12,698 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:11:12,715 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:11:12,719 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:11:12,720 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:11:12,721 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:11:12,722 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/list_search-2.i [2019-10-14 23:11:12,799 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9fc4bd2fa/bfccbfafc1c347febf6a21e64e7431a4/FLAG077b33281 [2019-10-14 23:11:13,400 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:11:13,401 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-properties/list_search-2.i [2019-10-14 23:11:13,420 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9fc4bd2fa/bfccbfafc1c347febf6a21e64e7431a4/FLAG077b33281 [2019-10-14 23:11:13,646 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9fc4bd2fa/bfccbfafc1c347febf6a21e64e7431a4 [2019-10-14 23:11:13,656 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:11:13,658 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:11:13,659 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:11:13,659 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:11:13,663 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:11:13,664 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:11:13" (1/1) ... [2019-10-14 23:11:13,667 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cb44e5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:11:13, skipping insertion in model container [2019-10-14 23:11:13,667 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:11:13" (1/1) ... [2019-10-14 23:11:13,674 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:11:13,739 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:11:14,459 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:11:14,479 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:11:14,549 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:11:14,646 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:11:14,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:11:14 WrapperNode [2019-10-14 23:11:14,647 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:11:14,648 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:11:14,648 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:11:14,648 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:11:14,664 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:11:14" (1/1) ... [2019-10-14 23:11:14,664 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:11:14" (1/1) ... [2019-10-14 23:11:14,684 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:11:14" (1/1) ... [2019-10-14 23:11:14,685 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:11:14" (1/1) ... [2019-10-14 23:11:14,706 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:11:14" (1/1) ... [2019-10-14 23:11:14,713 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:11:14" (1/1) ... [2019-10-14 23:11:14,718 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:11:14" (1/1) ... [2019-10-14 23:11:14,728 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:11:14,728 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:11:14,729 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:11:14,729 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:11:14,730 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:11:14" (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 [2019-10-14 23:11:14,796 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:11:14,796 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:11:14,796 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 23:11:14,796 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-10-14 23:11:14,797 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-10-14 23:11:14,797 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2019-10-14 23:11:14,797 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2019-10-14 23:11:14,797 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2019-10-14 23:11:14,797 INFO L138 BoogieDeclarations]: Found implementation of procedure search_list [2019-10-14 23:11:14,798 INFO L138 BoogieDeclarations]: Found implementation of procedure delete_list [2019-10-14 23:11:14,798 INFO L138 BoogieDeclarations]: Found implementation of procedure insert_list [2019-10-14 23:11:14,798 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:11:14,798 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:11:14,798 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 23:11:14,799 INFO L130 BoogieDeclarations]: Found specification of procedure __underflow [2019-10-14 23:11:14,799 INFO L130 BoogieDeclarations]: Found specification of procedure __uflow [2019-10-14 23:11:14,799 INFO L130 BoogieDeclarations]: Found specification of procedure __overflow [2019-10-14 23:11:14,799 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_getc [2019-10-14 23:11:14,800 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_putc [2019-10-14 23:11:14,800 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_feof [2019-10-14 23:11:14,800 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_ferror [2019-10-14 23:11:14,802 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_peekc_locked [2019-10-14 23:11:14,803 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_flockfile [2019-10-14 23:11:14,803 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_funlockfile [2019-10-14 23:11:14,803 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_ftrylockfile [2019-10-14 23:11:14,803 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_vfscanf [2019-10-14 23:11:14,803 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_vfprintf [2019-10-14 23:11:14,804 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_padn [2019-10-14 23:11:14,804 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_sgetn [2019-10-14 23:11:14,804 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_seekoff [2019-10-14 23:11:14,804 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_seekpos [2019-10-14 23:11:14,805 INFO L130 BoogieDeclarations]: Found specification of procedure _IO_free_backup_area [2019-10-14 23:11:14,805 INFO L130 BoogieDeclarations]: Found specification of procedure remove [2019-10-14 23:11:14,805 INFO L130 BoogieDeclarations]: Found specification of procedure rename [2019-10-14 23:11:14,805 INFO L130 BoogieDeclarations]: Found specification of procedure renameat [2019-10-14 23:11:14,805 INFO L130 BoogieDeclarations]: Found specification of procedure tmpfile [2019-10-14 23:11:14,806 INFO L130 BoogieDeclarations]: Found specification of procedure tmpnam [2019-10-14 23:11:14,806 INFO L130 BoogieDeclarations]: Found specification of procedure tmpnam_r [2019-10-14 23:11:14,806 INFO L130 BoogieDeclarations]: Found specification of procedure tempnam [2019-10-14 23:11:14,806 INFO L130 BoogieDeclarations]: Found specification of procedure fclose [2019-10-14 23:11:14,806 INFO L130 BoogieDeclarations]: Found specification of procedure fflush [2019-10-14 23:11:14,807 INFO L130 BoogieDeclarations]: Found specification of procedure fflush_unlocked [2019-10-14 23:11:14,807 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2019-10-14 23:11:14,807 INFO L130 BoogieDeclarations]: Found specification of procedure freopen [2019-10-14 23:11:14,807 INFO L130 BoogieDeclarations]: Found specification of procedure fdopen [2019-10-14 23:11:14,808 INFO L130 BoogieDeclarations]: Found specification of procedure fmemopen [2019-10-14 23:11:14,808 INFO L130 BoogieDeclarations]: Found specification of procedure open_memstream [2019-10-14 23:11:14,808 INFO L130 BoogieDeclarations]: Found specification of procedure setbuf [2019-10-14 23:11:14,808 INFO L130 BoogieDeclarations]: Found specification of procedure setvbuf [2019-10-14 23:11:14,808 INFO L130 BoogieDeclarations]: Found specification of procedure setbuffer [2019-10-14 23:11:14,809 INFO L130 BoogieDeclarations]: Found specification of procedure setlinebuf [2019-10-14 23:11:14,809 INFO L130 BoogieDeclarations]: Found specification of procedure fprintf [2019-10-14 23:11:14,809 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-14 23:11:14,809 INFO L130 BoogieDeclarations]: Found specification of procedure sprintf [2019-10-14 23:11:14,809 INFO L130 BoogieDeclarations]: Found specification of procedure vfprintf [2019-10-14 23:11:14,809 INFO L130 BoogieDeclarations]: Found specification of procedure vprintf [2019-10-14 23:11:14,810 INFO L130 BoogieDeclarations]: Found specification of procedure vsprintf [2019-10-14 23:11:14,810 INFO L130 BoogieDeclarations]: Found specification of procedure snprintf [2019-10-14 23:11:14,810 INFO L130 BoogieDeclarations]: Found specification of procedure vsnprintf [2019-10-14 23:11:14,810 INFO L130 BoogieDeclarations]: Found specification of procedure vdprintf [2019-10-14 23:11:14,810 INFO L130 BoogieDeclarations]: Found specification of procedure dprintf [2019-10-14 23:11:14,810 INFO L130 BoogieDeclarations]: Found specification of procedure fscanf [2019-10-14 23:11:14,811 INFO L130 BoogieDeclarations]: Found specification of procedure scanf [2019-10-14 23:11:14,811 INFO L130 BoogieDeclarations]: Found specification of procedure sscanf [2019-10-14 23:11:14,811 INFO L130 BoogieDeclarations]: Found specification of procedure vfscanf [2019-10-14 23:11:14,811 INFO L130 BoogieDeclarations]: Found specification of procedure vscanf [2019-10-14 23:11:14,811 INFO L130 BoogieDeclarations]: Found specification of procedure vsscanf [2019-10-14 23:11:14,811 INFO L130 BoogieDeclarations]: Found specification of procedure fgetc [2019-10-14 23:11:14,813 INFO L130 BoogieDeclarations]: Found specification of procedure getc [2019-10-14 23:11:14,813 INFO L130 BoogieDeclarations]: Found specification of procedure getchar [2019-10-14 23:11:14,813 INFO L130 BoogieDeclarations]: Found specification of procedure getc_unlocked [2019-10-14 23:11:14,813 INFO L130 BoogieDeclarations]: Found specification of procedure getchar_unlocked [2019-10-14 23:11:14,813 INFO L130 BoogieDeclarations]: Found specification of procedure fgetc_unlocked [2019-10-14 23:11:14,814 INFO L130 BoogieDeclarations]: Found specification of procedure fputc [2019-10-14 23:11:14,814 INFO L130 BoogieDeclarations]: Found specification of procedure putc [2019-10-14 23:11:14,815 INFO L130 BoogieDeclarations]: Found specification of procedure putchar [2019-10-14 23:11:14,815 INFO L130 BoogieDeclarations]: Found specification of procedure fputc_unlocked [2019-10-14 23:11:14,815 INFO L130 BoogieDeclarations]: Found specification of procedure putc_unlocked [2019-10-14 23:11:14,815 INFO L130 BoogieDeclarations]: Found specification of procedure putchar_unlocked [2019-10-14 23:11:14,815 INFO L130 BoogieDeclarations]: Found specification of procedure getw [2019-10-14 23:11:14,816 INFO L130 BoogieDeclarations]: Found specification of procedure putw [2019-10-14 23:11:14,816 INFO L130 BoogieDeclarations]: Found specification of procedure fgets [2019-10-14 23:11:14,817 INFO L130 BoogieDeclarations]: Found specification of procedure __getdelim [2019-10-14 23:11:14,817 INFO L130 BoogieDeclarations]: Found specification of procedure getdelim [2019-10-14 23:11:14,817 INFO L130 BoogieDeclarations]: Found specification of procedure getline [2019-10-14 23:11:14,817 INFO L130 BoogieDeclarations]: Found specification of procedure fputs [2019-10-14 23:11:14,818 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2019-10-14 23:11:14,818 INFO L130 BoogieDeclarations]: Found specification of procedure ungetc [2019-10-14 23:11:14,819 INFO L130 BoogieDeclarations]: Found specification of procedure fread [2019-10-14 23:11:14,819 INFO L130 BoogieDeclarations]: Found specification of procedure fwrite [2019-10-14 23:11:14,819 INFO L130 BoogieDeclarations]: Found specification of procedure fread_unlocked [2019-10-14 23:11:14,820 INFO L130 BoogieDeclarations]: Found specification of procedure fwrite_unlocked [2019-10-14 23:11:14,820 INFO L130 BoogieDeclarations]: Found specification of procedure fseek [2019-10-14 23:11:14,821 INFO L130 BoogieDeclarations]: Found specification of procedure ftell [2019-10-14 23:11:14,821 INFO L130 BoogieDeclarations]: Found specification of procedure rewind [2019-10-14 23:11:14,821 INFO L130 BoogieDeclarations]: Found specification of procedure fseeko [2019-10-14 23:11:14,821 INFO L130 BoogieDeclarations]: Found specification of procedure ftello [2019-10-14 23:11:14,821 INFO L130 BoogieDeclarations]: Found specification of procedure fgetpos [2019-10-14 23:11:14,821 INFO L130 BoogieDeclarations]: Found specification of procedure fsetpos [2019-10-14 23:11:14,822 INFO L130 BoogieDeclarations]: Found specification of procedure clearerr [2019-10-14 23:11:14,822 INFO L130 BoogieDeclarations]: Found specification of procedure feof [2019-10-14 23:11:14,822 INFO L130 BoogieDeclarations]: Found specification of procedure ferror [2019-10-14 23:11:14,822 INFO L130 BoogieDeclarations]: Found specification of procedure clearerr_unlocked [2019-10-14 23:11:14,822 INFO L130 BoogieDeclarations]: Found specification of procedure feof_unlocked [2019-10-14 23:11:14,822 INFO L130 BoogieDeclarations]: Found specification of procedure ferror_unlocked [2019-10-14 23:11:14,823 INFO L130 BoogieDeclarations]: Found specification of procedure perror [2019-10-14 23:11:14,823 INFO L130 BoogieDeclarations]: Found specification of procedure fileno [2019-10-14 23:11:14,823 INFO L130 BoogieDeclarations]: Found specification of procedure fileno_unlocked [2019-10-14 23:11:14,823 INFO L130 BoogieDeclarations]: Found specification of procedure popen [2019-10-14 23:11:14,823 INFO L130 BoogieDeclarations]: Found specification of procedure pclose [2019-10-14 23:11:14,823 INFO L130 BoogieDeclarations]: Found specification of procedure ctermid [2019-10-14 23:11:14,824 INFO L130 BoogieDeclarations]: Found specification of procedure flockfile [2019-10-14 23:11:14,824 INFO L130 BoogieDeclarations]: Found specification of procedure ftrylockfile [2019-10-14 23:11:14,824 INFO L130 BoogieDeclarations]: Found specification of procedure funlockfile [2019-10-14 23:11:14,824 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-10-14 23:11:14,824 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-10-14 23:11:14,824 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-10-14 23:11:14,825 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-10-14 23:11:14,825 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-10-14 23:11:14,825 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-10-14 23:11:14,826 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-10-14 23:11:14,826 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-10-14 23:11:14,826 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-10-14 23:11:14,826 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-10-14 23:11:14,826 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-10-14 23:11:14,826 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-10-14 23:11:14,827 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-10-14 23:11:14,827 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-10-14 23:11:14,827 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-10-14 23:11:14,827 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-10-14 23:11:14,827 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-10-14 23:11:14,828 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-10-14 23:11:14,828 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2019-10-14 23:11:14,829 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2019-10-14 23:11:14,829 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2019-10-14 23:11:14,829 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-10-14 23:11:14,829 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-10-14 23:11:14,829 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-10-14 23:11:14,830 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-10-14 23:11:14,830 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-10-14 23:11:14,834 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-10-14 23:11:14,834 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-10-14 23:11:14,834 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-10-14 23:11:14,835 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-10-14 23:11:14,842 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-10-14 23:11:14,842 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-10-14 23:11:14,843 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-10-14 23:11:14,843 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-10-14 23:11:14,843 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-10-14 23:11:14,844 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-10-14 23:11:14,844 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-10-14 23:11:14,844 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-10-14 23:11:14,845 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-10-14 23:11:14,845 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-10-14 23:11:14,845 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-10-14 23:11:14,845 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-10-14 23:11:14,845 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-10-14 23:11:14,845 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-10-14 23:11:14,845 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-10-14 23:11:14,846 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-10-14 23:11:14,846 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-10-14 23:11:14,846 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-10-14 23:11:14,846 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-10-14 23:11:14,846 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-10-14 23:11:14,846 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-10-14 23:11:14,847 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-10-14 23:11:14,847 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-10-14 23:11:14,847 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-10-14 23:11:14,847 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-10-14 23:11:14,847 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-14 23:11:14,847 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-10-14 23:11:14,848 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-10-14 23:11:14,848 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-14 23:11:14,848 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-10-14 23:11:14,848 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-10-14 23:11:14,848 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-10-14 23:11:14,848 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-10-14 23:11:14,849 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-10-14 23:11:14,849 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-10-14 23:11:14,849 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-10-14 23:11:14,849 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-10-14 23:11:14,849 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 23:11:14,849 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-10-14 23:11:14,850 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-10-14 23:11:14,850 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-10-14 23:11:14,850 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-10-14 23:11:14,850 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-10-14 23:11:14,850 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-10-14 23:11:14,850 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-10-14 23:11:14,851 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-10-14 23:11:14,851 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-10-14 23:11:14,851 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-10-14 23:11:14,851 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-10-14 23:11:14,851 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-10-14 23:11:14,852 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-10-14 23:11:14,852 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-10-14 23:11:14,852 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-10-14 23:11:14,852 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-10-14 23:11:14,852 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-10-14 23:11:14,852 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-10-14 23:11:14,853 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-10-14 23:11:14,853 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-10-14 23:11:14,853 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-10-14 23:11:14,853 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-10-14 23:11:14,853 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-10-14 23:11:14,853 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-10-14 23:11:14,854 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-10-14 23:11:14,854 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-10-14 23:11:14,855 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-10-14 23:11:14,856 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-10-14 23:11:14,856 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-10-14 23:11:14,856 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-10-14 23:11:14,856 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-10-14 23:11:14,856 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-10-14 23:11:14,857 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-10-14 23:11:14,857 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-10-14 23:11:14,857 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-10-14 23:11:14,857 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-10-14 23:11:14,857 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-10-14 23:11:14,857 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-10-14 23:11:14,858 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-10-14 23:11:14,858 INFO L130 BoogieDeclarations]: Found specification of procedure search_list [2019-10-14 23:11:14,858 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 23:11:14,858 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-14 23:11:14,858 INFO L130 BoogieDeclarations]: Found specification of procedure delete_list [2019-10-14 23:11:14,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-14 23:11:14,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 23:11:14,859 INFO L130 BoogieDeclarations]: Found specification of procedure insert_list [2019-10-14 23:11:14,859 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-14 23:11:14,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 23:11:14,859 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:11:14,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:11:14,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:11:15,583 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:11:15,583 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-14 23:11:15,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:11:15 BoogieIcfgContainer [2019-10-14 23:11:15,585 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:11:15,586 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:11:15,586 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:11:15,590 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:11:15,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:11:13" (1/3) ... [2019-10-14 23:11:15,591 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40953b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:11:15, skipping insertion in model container [2019-10-14 23:11:15,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:11:14" (2/3) ... [2019-10-14 23:11:15,591 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40953b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:11:15, skipping insertion in model container [2019-10-14 23:11:15,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:11:15" (3/3) ... [2019-10-14 23:11:15,593 INFO L109 eAbstractionObserver]: Analyzing ICFG list_search-2.i [2019-10-14 23:11:15,603 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:11:15,612 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:11:15,623 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:11:15,652 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:11:15,652 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:11:15,652 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:11:15,652 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:11:15,652 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:11:15,652 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:11:15,652 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:11:15,652 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:11:15,669 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states. [2019-10-14 23:11:15,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-14 23:11:15,675 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:11:15,676 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] [2019-10-14 23:11:15,678 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:11:15,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:11:15,683 INFO L82 PathProgramCache]: Analyzing trace with hash 694957185, now seen corresponding path program 1 times [2019-10-14 23:11:15,690 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:11:15,690 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811282352] [2019-10-14 23:11:15,690 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:11:15,693 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:11:15,693 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:11:15,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:16,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:16,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:16,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:16,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:16,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:16,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:16,124 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-14 23:11:16,128 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811282352] [2019-10-14 23:11:16,129 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:11:16,129 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:11:16,130 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276088702] [2019-10-14 23:11:16,138 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:11:16,138 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:11:16,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:11:16,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:11:16,157 INFO L87 Difference]: Start difference. First operand 52 states. Second operand 4 states. [2019-10-14 23:11:16,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:11:16,377 INFO L93 Difference]: Finished difference Result 85 states and 110 transitions. [2019-10-14 23:11:16,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:11:16,379 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 46 [2019-10-14 23:11:16,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:11:16,389 INFO L225 Difference]: With dead ends: 85 [2019-10-14 23:11:16,389 INFO L226 Difference]: Without dead ends: 34 [2019-10-14 23:11:16,393 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 [2019-10-14 23:11:16,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-14 23:11:16,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-10-14 23:11:16,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-14 23:11:16,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2019-10-14 23:11:16,439 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 46 [2019-10-14 23:11:16,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:11:16,441 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2019-10-14 23:11:16,441 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:11:16,442 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2019-10-14 23:11:16,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-10-14 23:11:16,444 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:11:16,444 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] [2019-10-14 23:11:16,445 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:11:16,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:11:16,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1251884926, now seen corresponding path program 1 times [2019-10-14 23:11:16,445 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:11:16,446 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595351484] [2019-10-14 23:11:16,446 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:11:16,446 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:11:16,446 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:11:16,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:16,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:16,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:16,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:16,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:16,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:16,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:16,717 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-14 23:11:16,718 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595351484] [2019-10-14 23:11:16,718 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:11:16,718 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-14 23:11:16,719 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232988085] [2019-10-14 23:11:16,721 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 23:11:16,721 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:11:16,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 23:11:16,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:11:16,722 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 7 states. [2019-10-14 23:11:17,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:11:17,031 INFO L93 Difference]: Finished difference Result 63 states and 78 transitions. [2019-10-14 23:11:17,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 23:11:17,033 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 48 [2019-10-14 23:11:17,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:11:17,036 INFO L225 Difference]: With dead ends: 63 [2019-10-14 23:11:17,036 INFO L226 Difference]: Without dead ends: 38 [2019-10-14 23:11:17,038 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 [2019-10-14 23:11:17,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-14 23:11:17,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2019-10-14 23:11:17,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-14 23:11:17,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2019-10-14 23:11:17,058 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 48 [2019-10-14 23:11:17,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:11:17,059 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2019-10-14 23:11:17,059 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 23:11:17,059 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2019-10-14 23:11:17,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-10-14 23:11:17,062 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:11:17,063 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] [2019-10-14 23:11:17,063 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:11:17,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:11:17,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1415498856, now seen corresponding path program 1 times [2019-10-14 23:11:17,065 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:11:17,065 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910368027] [2019-10-14 23:11:17,065 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:11:17,065 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:11:17,066 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:11:17,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:17,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:17,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:17,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:17,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:17,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:17,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:17,458 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-14 23:11:17,459 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910368027] [2019-10-14 23:11:17,459 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:11:17,459 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2019-10-14 23:11:17,459 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352143318] [2019-10-14 23:11:17,461 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 23:11:17,461 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:11:17,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 23:11:17,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:11:17,464 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 12 states. [2019-10-14 23:11:18,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:11:18,161 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2019-10-14 23:11:18,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 23:11:18,161 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2019-10-14 23:11:18,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:11:18,166 INFO L225 Difference]: With dead ends: 55 [2019-10-14 23:11:18,166 INFO L226 Difference]: Without dead ends: 46 [2019-10-14 23:11:18,167 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 [2019-10-14 23:11:18,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-14 23:11:18,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2019-10-14 23:11:18,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-14 23:11:18,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2019-10-14 23:11:18,184 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 49 [2019-10-14 23:11:18,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:11:18,184 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2019-10-14 23:11:18,184 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 23:11:18,185 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2019-10-14 23:11:18,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-10-14 23:11:18,186 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:11:18,186 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] [2019-10-14 23:11:18,186 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:11:18,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:11:18,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1022471846, now seen corresponding path program 1 times [2019-10-14 23:11:18,187 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:11:18,187 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41844045] [2019-10-14 23:11:18,188 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:11:18,188 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:11:18,188 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:11:18,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:18,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:18,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:18,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:18,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:18,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:18,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:18,353 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-14 23:11:18,353 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41844045] [2019-10-14 23:11:18,353 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:11:18,354 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-10-14 23:11:18,354 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661474878] [2019-10-14 23:11:18,354 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:11:18,354 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:11:18,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:11:18,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:11:18,355 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand 9 states. [2019-10-14 23:11:18,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:11:18,745 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2019-10-14 23:11:18,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 23:11:18,746 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2019-10-14 23:11:18,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:11:18,747 INFO L225 Difference]: With dead ends: 53 [2019-10-14 23:11:18,748 INFO L226 Difference]: Without dead ends: 41 [2019-10-14 23:11:18,748 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 [2019-10-14 23:11:18,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-14 23:11:18,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2019-10-14 23:11:18,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-14 23:11:18,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2019-10-14 23:11:18,760 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 49 [2019-10-14 23:11:18,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:11:18,761 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2019-10-14 23:11:18,761 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:11:18,761 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2019-10-14 23:11:18,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-14 23:11:18,762 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:11:18,763 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] [2019-10-14 23:11:18,763 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:11:18,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:11:18,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1923734059, now seen corresponding path program 1 times [2019-10-14 23:11:18,764 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:11:18,765 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275486619] [2019-10-14 23:11:18,765 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:11:18,765 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:11:18,765 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:11:18,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:18,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:18,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:18,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:18,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:18,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:18,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:19,039 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-14 23:11:19,039 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275486619] [2019-10-14 23:11:19,040 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242421495] [2019-10-14 23:11:19,040 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:11:19,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:19,217 INFO L256 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-14 23:11:19,228 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:11:19,311 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-14 23:11:19,311 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:11:19,312 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 15 [2019-10-14 23:11:19,312 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779332129] [2019-10-14 23:11:19,313 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:11:19,313 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:11:19,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:11:19,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2019-10-14 23:11:19,314 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 5 states. [2019-10-14 23:11:19,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:11:19,436 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2019-10-14 23:11:19,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:11:19,437 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 52 [2019-10-14 23:11:19,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:11:19,438 INFO L225 Difference]: With dead ends: 74 [2019-10-14 23:11:19,439 INFO L226 Difference]: Without dead ends: 43 [2019-10-14 23:11:19,439 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2019-10-14 23:11:19,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-14 23:11:19,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-10-14 23:11:19,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-14 23:11:19,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2019-10-14 23:11:19,447 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 52 [2019-10-14 23:11:19,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:11:19,448 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2019-10-14 23:11:19,448 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:11:19,448 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2019-10-14 23:11:19,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-14 23:11:19,449 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:11:19,449 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] [2019-10-14 23:11:19,652 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:11:19,652 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:11:19,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:11:19,653 INFO L82 PathProgramCache]: Analyzing trace with hash 125653783, now seen corresponding path program 1 times [2019-10-14 23:11:19,654 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:11:19,654 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664915010] [2019-10-14 23:11:19,654 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:11:19,655 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:11:19,655 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:11:19,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:19,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:19,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:19,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:19,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:19,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:19,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:19,890 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-14 23:11:19,890 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664915010] [2019-10-14 23:11:19,890 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292259198] [2019-10-14 23:11:19,891 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 [2019-10-14 23:11:20,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:20,103 INFO L256 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 28 conjunts are in the unsatisfiable core [2019-10-14 23:11:20,114 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:11:20,209 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 [2019-10-14 23:11:20,210 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:11:20,213 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:11:20,213 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:11:20,214 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2019-10-14 23:11:20,256 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-14 23:11:20,256 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:11:20,257 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 15 [2019-10-14 23:11:20,257 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47772794] [2019-10-14 23:11:20,257 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 23:11:20,258 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:11:20,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 23:11:20,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2019-10-14 23:11:20,260 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 15 states. [2019-10-14 23:11:20,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:11:20,678 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2019-10-14 23:11:20,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 23:11:20,679 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 52 [2019-10-14 23:11:20,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:11:20,681 INFO L225 Difference]: With dead ends: 53 [2019-10-14 23:11:20,681 INFO L226 Difference]: Without dead ends: 44 [2019-10-14 23:11:20,682 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2019-10-14 23:11:20,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-14 23:11:20,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2019-10-14 23:11:20,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-14 23:11:20,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2019-10-14 23:11:20,689 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 52 [2019-10-14 23:11:20,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:11:20,690 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2019-10-14 23:11:20,690 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 23:11:20,690 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2019-10-14 23:11:20,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-14 23:11:20,691 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:11:20,691 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] [2019-10-14 23:11:20,896 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:11:20,897 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:11:20,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:11:20,897 INFO L82 PathProgramCache]: Analyzing trace with hash -267373227, now seen corresponding path program 1 times [2019-10-14 23:11:20,898 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:11:20,898 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159524311] [2019-10-14 23:11:20,898 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:11:20,899 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:11:20,899 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:11:20,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:21,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:21,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:21,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:21,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:21,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:21,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:21,165 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-14 23:11:21,165 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159524311] [2019-10-14 23:11:21,166 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356685290] [2019-10-14 23:11:21,166 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:11:21,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:21,373 INFO L256 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 30 conjunts are in the unsatisfiable core [2019-10-14 23:11:21,390 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:11:21,471 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:11:21,499 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 [2019-10-14 23:11:21,500 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:11:21,507 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 [2019-10-14 23:11:21,508 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 23:11:21,528 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:11:21,529 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2019-10-14 23:11:21,530 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:23 [2019-10-14 23:11:21,635 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-14 23:11:21,637 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:11:21,638 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 [2019-10-14 23:11:21,639 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:11:21,644 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:11:21,644 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:11:21,644 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:8 [2019-10-14 23:11:21,671 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-14 23:11:21,671 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:11:21,671 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2019-10-14 23:11:21,671 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428439318] [2019-10-14 23:11:21,673 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-14 23:11:21,673 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:11:21,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-14 23:11:21,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2019-10-14 23:11:21,674 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 20 states. [2019-10-14 23:11:22,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:11:22,588 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2019-10-14 23:11:22,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-14 23:11:22,589 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 52 [2019-10-14 23:11:22,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:11:22,590 INFO L225 Difference]: With dead ends: 64 [2019-10-14 23:11:22,591 INFO L226 Difference]: Without dead ends: 47 [2019-10-14 23:11:22,592 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=224, Invalid=1036, Unknown=0, NotChecked=0, Total=1260 [2019-10-14 23:11:22,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-14 23:11:22,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2019-10-14 23:11:22,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-14 23:11:22,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2019-10-14 23:11:22,601 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 52 [2019-10-14 23:11:22,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:11:22,601 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2019-10-14 23:11:22,602 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-14 23:11:22,602 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2019-10-14 23:11:22,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-10-14 23:11:22,603 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:11:22,603 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] [2019-10-14 23:11:22,807 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:11:22,808 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:11:22,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:11:22,809 INFO L82 PathProgramCache]: Analyzing trace with hash 740526843, now seen corresponding path program 2 times [2019-10-14 23:11:22,809 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:11:22,809 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636301308] [2019-10-14 23:11:22,810 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:11:22,810 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:11:22,810 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:11:22,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:22,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:22,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:22,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:22,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:22,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:23,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:23,139 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-14 23:11:23,140 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636301308] [2019-10-14 23:11:23,140 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218779870] [2019-10-14 23:11:23,140 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:11:23,312 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:11:23,312 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:11:23,314 INFO L256 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 28 conjunts are in the unsatisfiable core [2019-10-14 23:11:23,332 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:11:23,371 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 [2019-10-14 23:11:23,372 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:11:23,378 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:11:23,379 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:11:23,379 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:13 [2019-10-14 23:11:23,508 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-14 23:11:23,509 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:11:23,509 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 19 [2019-10-14 23:11:23,509 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10161972] [2019-10-14 23:11:23,511 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 23:11:23,512 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:11:23,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 23:11:23,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2019-10-14 23:11:23,515 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 19 states. [2019-10-14 23:11:24,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:11:24,335 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2019-10-14 23:11:24,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-14 23:11:24,338 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 53 [2019-10-14 23:11:24,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:11:24,339 INFO L225 Difference]: With dead ends: 64 [2019-10-14 23:11:24,340 INFO L226 Difference]: Without dead ends: 51 [2019-10-14 23:11:24,341 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=207, Invalid=1053, Unknown=0, NotChecked=0, Total=1260 [2019-10-14 23:11:24,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-10-14 23:11:24,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2019-10-14 23:11:24,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-14 23:11:24,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2019-10-14 23:11:24,352 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 53 [2019-10-14 23:11:24,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:11:24,353 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2019-10-14 23:11:24,353 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 23:11:24,353 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2019-10-14 23:11:24,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-14 23:11:24,354 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:11:24,355 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] [2019-10-14 23:11:24,567 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:11:24,568 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:11:24,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:11:24,568 INFO L82 PathProgramCache]: Analyzing trace with hash -784314466, now seen corresponding path program 3 times [2019-10-14 23:11:24,568 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:11:24,569 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998524396] [2019-10-14 23:11:24,569 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:11:24,569 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:11:24,569 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:11:24,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:24,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:24,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:24,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:24,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:24,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:25,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:25,306 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-14 23:11:25,307 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998524396] [2019-10-14 23:11:25,307 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824633864] [2019-10-14 23:11:25,307 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:11:25,519 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 23:11:25,519 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:11:25,522 INFO L256 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 68 conjunts are in the unsatisfiable core [2019-10-14 23:11:25,525 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:11:25,537 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 [2019-10-14 23:11:25,537 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:11:25,542 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:11:25,543 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:11:25,543 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-10-14 23:11:25,576 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:11:25,590 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 [2019-10-14 23:11:25,591 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:11:25,599 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 [2019-10-14 23:11:25,600 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 23:11:25,626 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:11:25,633 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 [2019-10-14 23:11:25,634 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-10-14 23:11:25,645 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 [2019-10-14 23:11:25,645 INFO L496 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-10-14 23:11:25,673 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:11:25,674 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 2 xjuncts. [2019-10-14 23:11:25,675 INFO L221 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:79, output treesize:39 [2019-10-14 23:11:25,877 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-14 23:11:25,891 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:11:25,895 INFO L496 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-14 23:11:25,906 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:11:25,908 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-10-14 23:11:25,908 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:65, output treesize:41 [2019-10-14 23:11:30,457 WARN L191 SmtUtils]: Spent 1.65 s on a formula simplification that was a NOOP. DAG size: 30 [2019-10-14 23:11:32,258 WARN L191 SmtUtils]: Spent 1.72 s on a formula simplification that was a NOOP. DAG size: 30 [2019-10-14 23:11:32,263 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:11:32,290 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:11:32,291 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 [2019-10-14 23:11:32,292 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:11:32,339 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:11:32,352 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:11:32,353 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 [2019-10-14 23:11:32,354 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 23:11:32,398 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:11:32,401 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|]} [2019-10-14 23:11:32,407 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:11:32,413 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 [2019-10-14 23:11:32,414 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-10-14 23:11:32,456 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:11:32,462 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:11:32,468 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 [2019-10-14 23:11:32,468 INFO L496 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-10-14 23:11:32,505 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:11:32,524 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:11:32,529 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 [2019-10-14 23:11:32,530 INFO L496 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-10-14 23:11:32,564 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:11:32,570 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:11:32,574 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 [2019-10-14 23:11:32,575 INFO L496 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-10-14 23:11:32,636 INFO L567 ElimStorePlain]: treesize reduction 4, result has 95.9 percent of original size [2019-10-14 23:11:32,637 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. [2019-10-14 23:11:32,637 INFO L221 ElimStorePlain]: Needed 7 recursive calls to eliminate 12 variables, input treesize:109, output treesize:65 [2019-10-14 23:11:33,315 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 23:11:33,315 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:11:33,316 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 18] total 39 [2019-10-14 23:11:33,316 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478658799] [2019-10-14 23:11:33,316 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-10-14 23:11:33,317 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:11:33,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-10-14 23:11:33,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1368, Unknown=3, NotChecked=0, Total=1482 [2019-10-14 23:11:33,318 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 39 states. [2019-10-14 23:11:36,464 WARN L191 SmtUtils]: Spent 2.91 s on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2019-10-14 23:11:44,229 WARN L191 SmtUtils]: Spent 7.71 s on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2019-10-14 23:11:47,352 WARN L191 SmtUtils]: Spent 3.06 s on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2019-10-14 23:11:51,383 WARN L191 SmtUtils]: Spent 3.84 s on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2019-10-14 23:11:59,044 WARN L191 SmtUtils]: Spent 7.61 s on a formula simplification. DAG size of input: 77 DAG size of output: 62