/usr/bin/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-ext3-properties/sll_length_check-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 21:14:59,420 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 21:14:59,423 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 21:14:59,445 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 21:14:59,445 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 21:14:59,447 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 21:14:59,449 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 21:14:59,459 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 21:14:59,463 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 21:14:59,467 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 21:14:59,469 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 21:14:59,471 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 21:14:59,471 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 21:14:59,473 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 21:14:59,475 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 21:14:59,477 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 21:14:59,479 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 21:14:59,480 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 21:14:59,482 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 21:14:59,487 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 21:14:59,491 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 21:14:59,494 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 21:14:59,499 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 21:14:59,500 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 21:14:59,502 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-06 21:14:59,502 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-06 21:14:59,502 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-06 21:14:59,504 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-06 21:14:59,505 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-06 21:14:59,506 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-06 21:14:59,507 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 21:14:59,508 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 21:14:59,509 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 21:14:59,510 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 21:14:59,511 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 21:14:59,511 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 21:14:59,512 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 21:14:59,512 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 21:14:59,512 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 21:14:59,513 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 21:14:59,514 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 21:14:59,515 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 [2019-11-06 21:14:59,540 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 21:14:59,540 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 21:14:59,541 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 21:14:59,541 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 21:14:59,542 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 21:14:59,542 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 21:14:59,542 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 21:14:59,542 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 21:14:59,543 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 21:14:59,543 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 21:14:59,543 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 21:14:59,543 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 21:14:59,543 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 21:14:59,544 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 21:14:59,544 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 21:14:59,544 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 21:14:59,544 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 21:14:59,544 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 21:14:59,545 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 21:14:59,545 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 21:14:59,545 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 21:14:59,545 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 21:14:59,545 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 21:14:59,546 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 21:14:59,546 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 21:14:59,546 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 21:14:59,546 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 21:14:59,547 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 21:14:59,547 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 21:14:59,871 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 21:14:59,894 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 21:14:59,898 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 21:14:59,899 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 21:14:59,900 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 21:14:59,901 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/sll_length_check-2.i [2019-11-06 21:14:59,974 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d0cb835a/8046d0cc85074bf599a13143f77b8f11/FLAG004bc312f [2019-11-06 21:15:00,545 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 21:15:00,545 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-ext3-properties/sll_length_check-2.i [2019-11-06 21:15:00,563 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d0cb835a/8046d0cc85074bf599a13143f77b8f11/FLAG004bc312f [2019-11-06 21:15:00,865 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d0cb835a/8046d0cc85074bf599a13143f77b8f11 [2019-11-06 21:15:00,873 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 21:15:00,874 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 21:15:00,875 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 21:15:00,875 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 21:15:00,879 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 21:15:00,880 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:15:00" (1/1) ... [2019-11-06 21:15:00,883 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5823125d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:15:00, skipping insertion in model container [2019-11-06 21:15:00,883 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:15:00" (1/1) ... [2019-11-06 21:15:00,891 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 21:15:00,940 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 21:15:01,329 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 21:15:01,337 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 21:15:01,383 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 21:15:01,444 INFO L192 MainTranslator]: Completed translation [2019-11-06 21:15:01,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:15:01 WrapperNode [2019-11-06 21:15:01,445 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 21:15:01,446 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 21:15:01,446 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 21:15:01,446 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 21:15:01,460 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:15:01" (1/1) ... [2019-11-06 21:15:01,460 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:15:01" (1/1) ... [2019-11-06 21:15:01,476 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:15:01" (1/1) ... [2019-11-06 21:15:01,476 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:15:01" (1/1) ... [2019-11-06 21:15:01,490 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:15:01" (1/1) ... [2019-11-06 21:15:01,496 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:15:01" (1/1) ... [2019-11-06 21:15:01,499 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:15:01" (1/1) ... [2019-11-06 21:15:01,505 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 21:15:01,506 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 21:15:01,506 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 21:15:01,506 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 21:15:01,507 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:15:01" (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 [2019-11-06 21:15:01,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 21:15:01,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 21:15:01,577 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-11-06 21:15:01,577 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-11-06 21:15:01,578 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2019-11-06 21:15:01,578 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2019-11-06 21:15:01,578 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_length [2019-11-06 21:15:01,579 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2019-11-06 21:15:01,579 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 21:15:01,579 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 21:15:01,580 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 21:15:01,580 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-11-06 21:15:01,580 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-11-06 21:15:01,581 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-11-06 21:15:01,581 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-11-06 21:15:01,582 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-11-06 21:15:01,584 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-11-06 21:15:01,584 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-11-06 21:15:01,584 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-11-06 21:15:01,584 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-11-06 21:15:01,584 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-11-06 21:15:01,585 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-11-06 21:15:01,585 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-11-06 21:15:01,585 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-11-06 21:15:01,585 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-11-06 21:15:01,585 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-11-06 21:15:01,585 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-11-06 21:15:01,586 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-11-06 21:15:01,586 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-11-06 21:15:01,586 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-11-06 21:15:01,586 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-11-06 21:15:01,586 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-11-06 21:15:01,586 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-11-06 21:15:01,586 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-11-06 21:15:01,587 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-11-06 21:15:01,587 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-11-06 21:15:01,587 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-11-06 21:15:01,587 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-11-06 21:15:01,587 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-11-06 21:15:01,587 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-11-06 21:15:01,587 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-11-06 21:15:01,588 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-11-06 21:15:01,588 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-11-06 21:15:01,588 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-11-06 21:15:01,588 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-11-06 21:15:01,588 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-11-06 21:15:01,588 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-11-06 21:15:01,588 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-11-06 21:15:01,589 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-11-06 21:15:01,589 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-11-06 21:15:01,589 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-11-06 21:15:01,589 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-11-06 21:15:01,589 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-11-06 21:15:01,589 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-11-06 21:15:01,589 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-11-06 21:15:01,590 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-11-06 21:15:01,590 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-11-06 21:15:01,590 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-11-06 21:15:01,590 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-11-06 21:15:01,590 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-11-06 21:15:01,590 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-11-06 21:15:01,591 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-11-06 21:15:01,591 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-11-06 21:15:01,591 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-06 21:15:01,591 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-11-06 21:15:01,591 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-11-06 21:15:01,591 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-06 21:15:01,591 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2019-11-06 21:15:01,592 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-11-06 21:15:01,592 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-11-06 21:15:01,592 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-11-06 21:15:01,592 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-11-06 21:15:01,592 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-11-06 21:15:01,592 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-11-06 21:15:01,592 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-11-06 21:15:01,593 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-11-06 21:15:01,593 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 21:15:01,593 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-11-06 21:15:01,593 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-11-06 21:15:01,593 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-11-06 21:15:01,593 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-11-06 21:15:01,593 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-11-06 21:15:01,594 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-11-06 21:15:01,594 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-11-06 21:15:01,594 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-11-06 21:15:01,594 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-11-06 21:15:01,594 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-11-06 21:15:01,594 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-11-06 21:15:01,595 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-11-06 21:15:01,595 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-11-06 21:15:01,595 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-11-06 21:15:01,595 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-11-06 21:15:01,595 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-11-06 21:15:01,597 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-11-06 21:15:01,597 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-11-06 21:15:01,597 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-11-06 21:15:01,597 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-11-06 21:15:01,597 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-11-06 21:15:01,598 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-11-06 21:15:01,598 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-11-06 21:15:01,598 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-11-06 21:15:01,598 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-11-06 21:15:01,598 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-11-06 21:15:01,598 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-11-06 21:15:01,598 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-11-06 21:15:01,599 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-11-06 21:15:01,599 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-11-06 21:15:01,599 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-11-06 21:15:01,599 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-11-06 21:15:01,599 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-11-06 21:15:01,599 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-11-06 21:15:01,599 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-11-06 21:15:01,600 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-11-06 21:15:01,600 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-11-06 21:15:01,600 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-11-06 21:15:01,600 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-11-06 21:15:01,600 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2019-11-06 21:15:01,600 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2019-11-06 21:15:01,600 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-06 21:15:01,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-06 21:15:01,601 INFO L130 BoogieDeclarations]: Found specification of procedure sll_length [2019-11-06 21:15:01,601 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-06 21:15:01,601 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2019-11-06 21:15:01,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 21:15:01,601 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 21:15:01,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 21:15:01,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 21:15:01,933 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2019-11-06 21:15:02,111 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 21:15:02,114 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-06 21:15:02,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:15:02 BoogieIcfgContainer [2019-11-06 21:15:02,115 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 21:15:02,118 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 21:15:02,119 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 21:15:02,123 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 21:15:02,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:15:00" (1/3) ... [2019-11-06 21:15:02,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c7a20f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:15:02, skipping insertion in model container [2019-11-06 21:15:02,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:15:01" (2/3) ... [2019-11-06 21:15:02,125 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c7a20f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:15:02, skipping insertion in model container [2019-11-06 21:15:02,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:15:02" (3/3) ... [2019-11-06 21:15:02,131 INFO L109 eAbstractionObserver]: Analyzing ICFG sll_length_check-2.i [2019-11-06 21:15:02,141 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 21:15:02,149 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 21:15:02,161 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 21:15:02,183 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 21:15:02,184 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 21:15:02,184 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 21:15:02,184 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 21:15:02,185 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 21:15:02,185 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 21:15:02,185 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 21:15:02,185 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 21:15:02,200 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2019-11-06 21:15:02,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-06 21:15:02,207 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:15:02,208 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:15:02,210 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:15:02,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:15:02,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1666427650, now seen corresponding path program 1 times [2019-11-06 21:15:02,225 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:15:02,225 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622854904] [2019-11-06 21:15:02,225 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:15:02,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:02,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:02,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:02,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:02,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:15:02,468 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622854904] [2019-11-06 21:15:02,469 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:15:02,470 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 21:15:02,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803439664] [2019-11-06 21:15:02,480 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 21:15:02,480 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:15:02,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 21:15:02,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 21:15:02,497 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 4 states. [2019-11-06 21:15:02,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:15:02,719 INFO L93 Difference]: Finished difference Result 90 states and 120 transitions. [2019-11-06 21:15:02,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 21:15:02,721 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2019-11-06 21:15:02,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:15:02,731 INFO L225 Difference]: With dead ends: 90 [2019-11-06 21:15:02,731 INFO L226 Difference]: Without dead ends: 38 [2019-11-06 21:15:02,735 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 21:15:02,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-06 21:15:02,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2019-11-06 21:15:02,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-06 21:15:02,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2019-11-06 21:15:02,784 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 23 [2019-11-06 21:15:02,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:15:02,785 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2019-11-06 21:15:02,785 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 21:15:02,785 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2019-11-06 21:15:02,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-06 21:15:02,787 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:15:02,788 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:15:02,788 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:15:02,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:15:02,788 INFO L82 PathProgramCache]: Analyzing trace with hash -29727073, now seen corresponding path program 1 times [2019-11-06 21:15:02,789 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:15:02,789 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890597555] [2019-11-06 21:15:02,790 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:15:02,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:02,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:02,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:03,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:03,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:15:03,005 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890597555] [2019-11-06 21:15:03,006 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:15:03,006 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 21:15:03,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433518741] [2019-11-06 21:15:03,008 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 21:15:03,008 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:15:03,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 21:15:03,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-06 21:15:03,009 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 7 states. [2019-11-06 21:15:03,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:15:03,252 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2019-11-06 21:15:03,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 21:15:03,253 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2019-11-06 21:15:03,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:15:03,254 INFO L225 Difference]: With dead ends: 45 [2019-11-06 21:15:03,254 INFO L226 Difference]: Without dead ends: 31 [2019-11-06 21:15:03,256 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-11-06 21:15:03,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-06 21:15:03,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2019-11-06 21:15:03,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-06 21:15:03,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2019-11-06 21:15:03,268 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 25 [2019-11-06 21:15:03,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:15:03,268 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2019-11-06 21:15:03,269 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 21:15:03,269 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2019-11-06 21:15:03,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-06 21:15:03,270 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:15:03,270 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:15:03,270 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:15:03,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:15:03,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1680455870, now seen corresponding path program 1 times [2019-11-06 21:15:03,271 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:15:03,271 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953482514] [2019-11-06 21:15:03,271 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:15:03,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:03,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:03,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:03,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:03,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:15:03,507 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953482514] [2019-11-06 21:15:03,508 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:15:03,508 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2019-11-06 21:15:03,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142142737] [2019-11-06 21:15:03,509 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 21:15:03,509 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:15:03,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 21:15:03,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2019-11-06 21:15:03,510 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 12 states. [2019-11-06 21:15:03,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:15:03,877 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2019-11-06 21:15:03,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 21:15:03,878 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2019-11-06 21:15:03,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:15:03,879 INFO L225 Difference]: With dead ends: 39 [2019-11-06 21:15:03,879 INFO L226 Difference]: Without dead ends: 32 [2019-11-06 21:15:03,880 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2019-11-06 21:15:03,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-06 21:15:03,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2019-11-06 21:15:03,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-06 21:15:03,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2019-11-06 21:15:03,888 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 28 [2019-11-06 21:15:03,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:15:03,889 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2019-11-06 21:15:03,889 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 21:15:03,889 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2019-11-06 21:15:03,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-06 21:15:03,890 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:15:03,890 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:15:03,891 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:15:03,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:15:03,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1808388506, now seen corresponding path program 1 times [2019-11-06 21:15:03,891 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:15:03,892 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367173940] [2019-11-06 21:15:03,892 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:15:03,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:03,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:04,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:04,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:04,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 21:15:04,096 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367173940] [2019-11-06 21:15:04,096 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884606987] [2019-11-06 21:15:04,097 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 [2019-11-06 21:15:04,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:04,228 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 21:15:04,234 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:15:04,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 21:15:04,286 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 21:15:04,286 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 9 [2019-11-06 21:15:04,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273747806] [2019-11-06 21:15:04,287 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 21:15:04,287 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:15:04,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 21:15:04,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-11-06 21:15:04,288 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 9 states. [2019-11-06 21:15:04,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:15:04,523 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2019-11-06 21:15:04,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 21:15:04,524 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2019-11-06 21:15:04,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:15:04,525 INFO L225 Difference]: With dead ends: 50 [2019-11-06 21:15:04,525 INFO L226 Difference]: Without dead ends: 35 [2019-11-06 21:15:04,526 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2019-11-06 21:15:04,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-06 21:15:04,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2019-11-06 21:15:04,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-06 21:15:04,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2019-11-06 21:15:04,533 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 29 [2019-11-06 21:15:04,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:15:04,534 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2019-11-06 21:15:04,534 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 21:15:04,534 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2019-11-06 21:15:04,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-06 21:15:04,535 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:15:04,535 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 21:15:04,739 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:15:04,739 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:15:04,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:15:04,740 INFO L82 PathProgramCache]: Analyzing trace with hash 560900285, now seen corresponding path program 2 times [2019-11-06 21:15:04,741 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:15:04,741 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500262961] [2019-11-06 21:15:04,741 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:15:04,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:04,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:04,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:04,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:04,949 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:15:04,950 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500262961] [2019-11-06 21:15:04,950 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943583699] [2019-11-06 21:15:04,950 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:15:05,066 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 21:15:05,067 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:15:05,068 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 36 conjunts are in the unsatisfiable core [2019-11-06 21:15:05,074 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:15:05,138 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 11 treesize of output 7 [2019-11-06 21:15:05,139 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 21:15:05,145 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:15:05,146 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 21:15:05,146 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:8 [2019-11-06 21:15:05,285 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:15:05,286 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 21:15:05,286 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2019-11-06 21:15:05,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203611788] [2019-11-06 21:15:05,287 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-06 21:15:05,287 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:15:05,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-06 21:15:05,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2019-11-06 21:15:05,288 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 18 states. [2019-11-06 21:15:11,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:15:11,855 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2019-11-06 21:15:11,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 21:15:11,856 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 32 [2019-11-06 21:15:11,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:15:11,857 INFO L225 Difference]: With dead ends: 43 [2019-11-06 21:15:11,857 INFO L226 Difference]: Without dead ends: 36 [2019-11-06 21:15:11,858 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2019-11-06 21:15:11,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-06 21:15:11,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2019-11-06 21:15:11,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-06 21:15:11,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2019-11-06 21:15:11,865 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 32 [2019-11-06 21:15:11,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:15:11,866 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2019-11-06 21:15:11,866 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-06 21:15:11,866 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2019-11-06 21:15:11,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-06 21:15:11,867 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:15:11,867 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:15:12,080 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:15:12,080 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:15:12,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:15:12,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1724014721, now seen corresponding path program 3 times [2019-11-06 21:15:12,081 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:15:12,081 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255571932] [2019-11-06 21:15:12,081 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:15:12,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:12,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:12,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:12,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:12,246 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 21:15:12,246 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255571932] [2019-11-06 21:15:12,247 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509129383] [2019-11-06 21:15:12,247 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 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 [2019-11-06 21:15:12,344 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-06 21:15:12,344 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:15:12,346 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-06 21:15:12,348 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:15:12,398 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 21:15:12,398 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 21:15:12,399 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 11 [2019-11-06 21:15:12,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407367802] [2019-11-06 21:15:12,399 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 21:15:12,400 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:15:12,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 21:15:12,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2019-11-06 21:15:12,401 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 11 states. [2019-11-06 21:15:12,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:15:12,765 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2019-11-06 21:15:12,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 21:15:12,766 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2019-11-06 21:15:12,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:15:12,770 INFO L225 Difference]: With dead ends: 52 [2019-11-06 21:15:12,770 INFO L226 Difference]: Without dead ends: 48 [2019-11-06 21:15:12,771 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2019-11-06 21:15:12,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-06 21:15:12,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2019-11-06 21:15:12,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-06 21:15:12,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2019-11-06 21:15:12,781 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 33 [2019-11-06 21:15:12,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:15:12,782 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2019-11-06 21:15:12,782 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 21:15:12,782 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2019-11-06 21:15:12,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-06 21:15:12,784 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:15:12,785 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 21:15:12,996 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:15:12,997 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:15:12,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:15:12,997 INFO L82 PathProgramCache]: Analyzing trace with hash 458064125, now seen corresponding path program 4 times [2019-11-06 21:15:12,997 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:15:12,997 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033645343] [2019-11-06 21:15:12,998 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:15:13,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:13,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:13,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:13,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:13,374 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:15:13,375 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033645343] [2019-11-06 21:15:13,375 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078086650] [2019-11-06 21:15:13,375 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-11-06 21:15:13,462 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 21:15:13,462 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:15:13,464 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 52 conjunts are in the unsatisfiable core [2019-11-06 21:15:13,467 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:15:13,476 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 [2019-11-06 21:15:13,476 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 21:15:13,487 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:15:13,488 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-06 21:15:13,488 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-11-06 21:15:13,497 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 11 treesize of output 7 [2019-11-06 21:15:13,497 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 21:15:13,504 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:15:13,508 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 11 treesize of output 7 [2019-11-06 21:15:13,509 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-06 21:15:13,516 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:15:13,517 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 21:15:13,517 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:28, output treesize:20 [2019-11-06 21:15:13,531 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:15:13,531 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 11 treesize of output 15 [2019-11-06 21:15:13,532 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 21:15:13,540 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:15:13,540 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-06 21:15:13,541 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:19 [2019-11-06 21:15:13,585 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2019-11-06 21:15:13,585 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 21:15:13,599 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:15:13,604 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2019-11-06 21:15:13,605 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-06 21:15:13,617 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:15:13,618 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 21:15:13,619 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:41, output treesize:39 [2019-11-06 21:15:14,537 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:15:14,537 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 21:15:14,537 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 26 [2019-11-06 21:15:14,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126564456] [2019-11-06 21:15:14,538 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-06 21:15:14,538 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:15:14,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-06 21:15:14,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2019-11-06 21:15:14,539 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand 26 states. [2019-11-06 21:15:15,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:15:15,770 INFO L93 Difference]: Finished difference Result 75 states and 86 transitions. [2019-11-06 21:15:15,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-06 21:15:15,770 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 34 [2019-11-06 21:15:15,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:15:15,772 INFO L225 Difference]: With dead ends: 75 [2019-11-06 21:15:15,772 INFO L226 Difference]: Without dead ends: 65 [2019-11-06 21:15:15,773 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=159, Invalid=1323, Unknown=0, NotChecked=0, Total=1482 [2019-11-06 21:15:15,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-06 21:15:15,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 59. [2019-11-06 21:15:15,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-06 21:15:15,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2019-11-06 21:15:15,785 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 34 [2019-11-06 21:15:15,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:15:15,786 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2019-11-06 21:15:15,786 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-06 21:15:15,786 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2019-11-06 21:15:15,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-06 21:15:15,787 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:15:15,787 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:15:15,993 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:15:15,993 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:15:15,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:15:15,994 INFO L82 PathProgramCache]: Analyzing trace with hash -2005342475, now seen corresponding path program 1 times [2019-11-06 21:15:15,995 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:15:15,995 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139275681] [2019-11-06 21:15:15,995 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:15:16,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:16,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:16,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:16,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:16,121 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-06 21:15:16,122 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139275681] [2019-11-06 21:15:16,122 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603964881] [2019-11-06 21:15:16,122 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:15:16,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:16,216 INFO L256 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 21:15:16,226 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:15:16,240 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-06 21:15:16,240 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 21:15:16,241 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 11 [2019-11-06 21:15:16,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517178559] [2019-11-06 21:15:16,241 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 21:15:16,241 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:15:16,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 21:15:16,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-11-06 21:15:16,242 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand 11 states. [2019-11-06 21:15:16,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:15:16,538 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2019-11-06 21:15:16,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 21:15:16,539 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2019-11-06 21:15:16,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:15:16,542 INFO L225 Difference]: With dead ends: 69 [2019-11-06 21:15:16,542 INFO L226 Difference]: Without dead ends: 53 [2019-11-06 21:15:16,543 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-11-06 21:15:16,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-06 21:15:16,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2019-11-06 21:15:16,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-06 21:15:16,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2019-11-06 21:15:16,556 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 36 [2019-11-06 21:15:16,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:15:16,556 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2019-11-06 21:15:16,556 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 21:15:16,556 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2019-11-06 21:15:16,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-06 21:15:16,557 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:15:16,557 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:15:16,762 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:15:16,763 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:15:16,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:15:16,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1775282106, now seen corresponding path program 5 times [2019-11-06 21:15:16,764 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:15:16,765 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119011921] [2019-11-06 21:15:16,765 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:15:16,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:16,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:16,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:16,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:16,855 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-06 21:15:16,855 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119011921] [2019-11-06 21:15:16,855 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559220737] [2019-11-06 21:15:16,855 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:15:16,967 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-11-06 21:15:16,968 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:15:16,969 INFO L256 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 21:15:16,973 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:15:16,996 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-06 21:15:16,997 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 21:15:16,997 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 10 [2019-11-06 21:15:16,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066278324] [2019-11-06 21:15:16,999 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 21:15:16,999 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:15:16,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 21:15:17,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-11-06 21:15:17,000 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 10 states. [2019-11-06 21:15:17,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:15:17,248 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2019-11-06 21:15:17,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 21:15:17,248 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2019-11-06 21:15:17,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:15:17,250 INFO L225 Difference]: With dead ends: 62 [2019-11-06 21:15:17,250 INFO L226 Difference]: Without dead ends: 44 [2019-11-06 21:15:17,250 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2019-11-06 21:15:17,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-06 21:15:17,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2019-11-06 21:15:17,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-06 21:15:17,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2019-11-06 21:15:17,267 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 37 [2019-11-06 21:15:17,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:15:17,267 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2019-11-06 21:15:17,267 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 21:15:17,267 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2019-11-06 21:15:17,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-06 21:15:17,268 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:15:17,268 INFO L410 BasicCegarLoop]: trace histogram [3, 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] [2019-11-06 21:15:17,473 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:15:17,473 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:15:17,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:15:17,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1475160556, now seen corresponding path program 2 times [2019-11-06 21:15:17,475 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:15:17,475 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253500090] [2019-11-06 21:15:17,475 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:15:17,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:17,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:17,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:17,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:17,747 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-06 21:15:17,747 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253500090] [2019-11-06 21:15:17,747 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329913158] [2019-11-06 21:15:17,747 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:15:17,850 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 21:15:17,850 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:15:17,851 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 51 conjunts are in the unsatisfiable core [2019-11-06 21:15:17,855 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:15:17,865 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 [2019-11-06 21:15:17,866 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 21:15:17,869 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:15:17,870 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-06 21:15:17,870 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:10 [2019-11-06 21:15:17,886 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 11 treesize of output 7 [2019-11-06 21:15:17,886 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 21:15:17,891 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:15:17,892 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 21:15:17,892 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:14 [2019-11-06 21:15:17,900 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:15:17,900 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 11 treesize of output 15 [2019-11-06 21:15:17,901 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 21:15:17,904 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:15:17,905 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-06 21:15:17,905 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:13 [2019-11-06 21:15:17,930 INFO L392 ElimStorePlain]: Different costs {0=[|v_#memory_$Pointer$.offset_11|], 2=[|v_#memory_$Pointer$.base_13|]} [2019-11-06 21:15:17,933 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 11 treesize of output 7 [2019-11-06 21:15:17,934 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 21:15:17,942 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:15:17,949 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 19 [2019-11-06 21:15:17,949 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-06 21:15:17,956 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:15:17,957 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 21:15:17,957 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:35, output treesize:25 [2019-11-06 21:15:20,699 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-06 21:15:20,700 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 21:15:20,700 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 27 [2019-11-06 21:15:20,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487738474] [2019-11-06 21:15:20,701 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-06 21:15:20,701 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:15:20,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-06 21:15:20,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2019-11-06 21:15:20,702 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 27 states. [2019-11-06 21:15:37,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:15:37,898 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2019-11-06 21:15:37,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-06 21:15:37,899 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 39 [2019-11-06 21:15:37,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:15:37,900 INFO L225 Difference]: With dead ends: 50 [2019-11-06 21:15:37,900 INFO L226 Difference]: Without dead ends: 43 [2019-11-06 21:15:37,901 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=193, Invalid=1365, Unknown=2, NotChecked=0, Total=1560 [2019-11-06 21:15:37,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-06 21:15:37,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2019-11-06 21:15:37,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-06 21:15:37,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2019-11-06 21:15:37,908 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 39 [2019-11-06 21:15:37,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:15:37,908 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2019-11-06 21:15:37,908 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-06 21:15:37,909 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2019-11-06 21:15:37,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-06 21:15:37,911 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:15:37,912 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2019-11-06 21:15:38,115 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:15:38,116 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:15:38,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:15:38,116 INFO L82 PathProgramCache]: Analyzing trace with hash 848249904, now seen corresponding path program 3 times [2019-11-06 21:15:38,117 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:15:38,117 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96913593] [2019-11-06 21:15:38,117 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:15:38,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:38,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:38,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:38,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:38,323 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-06 21:15:38,324 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96913593] [2019-11-06 21:15:38,324 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128923708] [2019-11-06 21:15:38,324 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:15:38,423 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-06 21:15:38,424 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:15:38,424 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-06 21:15:38,434 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:15:38,473 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-06 21:15:38,473 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 21:15:38,473 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2019-11-06 21:15:38,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577620480] [2019-11-06 21:15:38,474 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 21:15:38,474 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:15:38,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 21:15:38,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2019-11-06 21:15:38,475 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 13 states. [2019-11-06 21:15:38,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:15:38,940 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2019-11-06 21:15:38,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 21:15:38,941 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2019-11-06 21:15:38,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:15:38,942 INFO L225 Difference]: With dead ends: 59 [2019-11-06 21:15:38,942 INFO L226 Difference]: Without dead ends: 55 [2019-11-06 21:15:38,943 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2019-11-06 21:15:38,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-11-06 21:15:38,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2019-11-06 21:15:38,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-11-06 21:15:38,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2019-11-06 21:15:38,951 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 40 [2019-11-06 21:15:38,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:15:38,952 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2019-11-06 21:15:38,952 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 21:15:38,952 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2019-11-06 21:15:38,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-06 21:15:38,953 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:15:38,953 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 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] [2019-11-06 21:15:39,162 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:15:39,163 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:15:39,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:15:39,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1406111124, now seen corresponding path program 4 times [2019-11-06 21:15:39,164 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:15:39,164 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522289080] [2019-11-06 21:15:39,164 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:15:39,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:39,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:39,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:39,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:15:40,119 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-06 21:15:40,119 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522289080] [2019-11-06 21:15:40,119 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658860477] [2019-11-06 21:15:40,120 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:15:40,225 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 21:15:40,225 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:15:40,227 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 73 conjunts are in the unsatisfiable core [2019-11-06 21:15:40,229 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:15:40,275 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 11 treesize of output 7 [2019-11-06 21:15:40,276 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 21:15:40,282 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:15:40,288 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 11 treesize of output 7 [2019-11-06 21:15:40,288 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-06 21:15:40,294 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:15:40,294 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 21:15:40,294 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2019-11-06 21:15:40,399 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:15:40,399 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 34 [2019-11-06 21:15:40,400 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 21:15:40,424 INFO L567 ElimStorePlain]: treesize reduction 12, result has 76.9 percent of original size [2019-11-06 21:15:40,438 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:15:40,438 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 34 [2019-11-06 21:15:40,439 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-06 21:15:40,467 INFO L567 ElimStorePlain]: treesize reduction 16, result has 69.2 percent of original size [2019-11-06 21:15:40,468 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 21:15:40,468 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:40, output treesize:41 [2019-11-06 21:15:40,655 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:15:40,692 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:15:40,693 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 66 [2019-11-06 21:15:40,694 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 21:15:40,737 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:15:40,738 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 100 [2019-11-06 21:15:40,739 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:15:40,740 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:15:40,740 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:15:40,741 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:15:40,742 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:15:40,743 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:15:40,745 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:15:40,745 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:15:40,746 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:15:40,746 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:15:40,747 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:15:40,748 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:15:40,749 INFO L496 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-06 21:15:40,868 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2019-11-06 21:15:40,868 INFO L567 ElimStorePlain]: treesize reduction 52, result has 65.6 percent of original size [2019-11-06 21:15:40,893 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:15:40,894 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 55 [2019-11-06 21:15:40,894 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-11-06 21:15:40,951 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:15:40,952 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 100 [2019-11-06 21:15:40,953 INFO L496 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-11-06 21:15:41,052 INFO L567 ElimStorePlain]: treesize reduction 48, result has 65.5 percent of original size [2019-11-06 21:15:41,054 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 2 xjuncts. [2019-11-06 21:15:41,054 INFO L221 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:115, output treesize:110 [2019-11-06 21:15:41,409 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:15:41,713 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:15:41,871 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:15:41,872 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:15:41,874 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:15:42,087 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-11-06 21:15:42,319 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-11-06 21:15:42,779 WARN L191 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2019-11-06 21:15:43,211 WARN L191 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2019-11-06 21:15:43,264 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-06 21:15:43,264 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 21:15:43,264 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 37 [2019-11-06 21:15:43,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658361747] [2019-11-06 21:15:43,265 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-11-06 21:15:43,265 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:15:43,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-11-06 21:15:43,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1238, Unknown=0, NotChecked=0, Total=1332 [2019-11-06 21:15:43,266 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand 37 states. [2019-11-06 21:15:44,736 WARN L191 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 79