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-simple/sll2n_remove_all_reverse.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:13:27,520 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:13:27,522 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:13:27,535 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:13:27,535 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:13:27,536 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:13:27,538 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:13:27,539 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:13:27,541 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:13:27,542 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:13:27,543 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:13:27,544 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:13:27,544 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:13:27,545 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:13:27,546 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:13:27,547 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:13:27,548 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:13:27,548 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:13:27,550 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:13:27,552 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:13:27,553 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:13:27,554 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:13:27,555 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:13:27,556 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:13:27,558 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 23:13:27,558 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 23:13:27,559 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 23:13:27,559 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 23:13:27,560 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 23:13:27,561 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 23:13:27,561 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:13:27,561 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:13:27,562 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:13:27,563 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:13:27,564 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:13:27,564 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:13:27,565 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:13:27,565 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:13:27,566 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:13:27,567 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:13:27,567 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:13:27,568 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 23:13:27,588 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:13:27,588 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:13:27,590 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:13:27,590 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:13:27,591 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:13:27,591 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:13:27,591 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:13:27,591 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:13:27,592 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:13:27,592 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:13:27,593 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:13:27,593 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:13:27,593 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:13:27,594 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:13:27,594 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:13:27,594 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:13:27,594 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:13:27,594 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:13:27,594 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:13:27,595 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:13:27,595 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:13:27,595 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:13:27,595 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:13:27,596 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:13:27,596 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:13:27,596 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:13:27,596 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:13:27,597 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:13:27,597 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:13:27,870 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:13:27,885 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:13:27,890 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:13:27,891 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:13:27,892 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:13:27,893 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-simple/sll2n_remove_all_reverse.i [2019-10-14 23:13:27,969 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5be3fbf1e/7ef8a41382184333859b4f589cdfe713/FLAG4d91f84ca [2019-10-14 23:13:28,512 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:13:28,513 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-simple/sll2n_remove_all_reverse.i [2019-10-14 23:13:28,525 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5be3fbf1e/7ef8a41382184333859b4f589cdfe713/FLAG4d91f84ca [2019-10-14 23:13:28,786 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5be3fbf1e/7ef8a41382184333859b4f589cdfe713 [2019-10-14 23:13:28,794 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:13:28,796 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:13:28,797 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:13:28,797 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:13:28,804 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:13:28,805 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:13:28" (1/1) ... [2019-10-14 23:13:28,812 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@553f51cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:13:28, skipping insertion in model container [2019-10-14 23:13:28,813 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:13:28" (1/1) ... [2019-10-14 23:13:28,819 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:13:28,853 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:13:29,285 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:13:29,295 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:13:29,356 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:13:29,420 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:13:29,420 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:13:29 WrapperNode [2019-10-14 23:13:29,420 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:13:29,421 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:13:29,421 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:13:29,422 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:13:29,432 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:13:29" (1/1) ... [2019-10-14 23:13:29,432 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:13:29" (1/1) ... [2019-10-14 23:13:29,452 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:13:29" (1/1) ... [2019-10-14 23:13:29,454 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:13:29" (1/1) ... [2019-10-14 23:13:29,473 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:13:29" (1/1) ... [2019-10-14 23:13:29,478 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:13:29" (1/1) ... [2019-10-14 23:13:29,482 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:13:29" (1/1) ... [2019-10-14 23:13:29,492 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:13:29,499 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:13:29,499 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:13:29,499 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:13:29,500 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:13:29" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:13:29,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:13:29,558 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:13:29,558 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-10-14 23:13:29,558 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-10-14 23:13:29,558 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2019-10-14 23:13:29,558 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2019-10-14 23:13:29,559 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2019-10-14 23:13:29,559 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_remove_last [2019-10-14 23:13:29,559 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:13:29,559 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:13:29,559 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-10-14 23:13:29,559 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-10-14 23:13:29,560 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-10-14 23:13:29,560 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-10-14 23:13:29,560 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-10-14 23:13:29,560 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-10-14 23:13:29,560 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-10-14 23:13:29,560 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-10-14 23:13:29,561 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-10-14 23:13:29,561 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-10-14 23:13:29,561 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-10-14 23:13:29,561 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-10-14 23:13:29,561 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-10-14 23:13:29,561 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-10-14 23:13:29,562 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-10-14 23:13:29,562 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-10-14 23:13:29,562 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-10-14 23:13:29,562 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-10-14 23:13:29,562 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-10-14 23:13:29,562 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-10-14 23:13:29,563 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-10-14 23:13:29,563 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-10-14 23:13:29,563 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-10-14 23:13:29,563 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-10-14 23:13:29,563 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-10-14 23:13:29,563 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-10-14 23:13:29,563 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-10-14 23:13:29,564 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-10-14 23:13:29,564 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-10-14 23:13:29,564 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-10-14 23:13:29,564 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-10-14 23:13:29,564 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-10-14 23:13:29,564 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-10-14 23:13:29,565 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-10-14 23:13:29,565 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-10-14 23:13:29,565 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-10-14 23:13:29,565 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-10-14 23:13:29,565 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-10-14 23:13:29,565 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-10-14 23:13:29,566 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-10-14 23:13:29,566 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-10-14 23:13:29,566 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-10-14 23:13:29,566 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-10-14 23:13:29,566 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-10-14 23:13:29,566 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-10-14 23:13:29,566 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-10-14 23:13:29,567 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-10-14 23:13:29,567 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-10-14 23:13:29,567 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-10-14 23:13:29,567 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-10-14 23:13:29,567 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-10-14 23:13:29,567 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-10-14 23:13:29,567 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-14 23:13:29,568 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-10-14 23:13:29,568 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-10-14 23:13:29,568 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-14 23:13:29,568 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2019-10-14 23:13:29,568 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-10-14 23:13:29,568 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-10-14 23:13:29,569 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-10-14 23:13:29,569 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-10-14 23:13:29,569 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-10-14 23:13:29,569 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-10-14 23:13:29,569 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-10-14 23:13:29,569 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-10-14 23:13:29,569 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 23:13:29,570 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-10-14 23:13:29,570 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-10-14 23:13:29,570 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-10-14 23:13:29,570 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-10-14 23:13:29,570 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-10-14 23:13:29,570 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-10-14 23:13:29,571 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-10-14 23:13:29,571 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-10-14 23:13:29,571 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-10-14 23:13:29,571 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-10-14 23:13:29,571 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-10-14 23:13:29,571 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-10-14 23:13:29,571 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-10-14 23:13:29,572 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-10-14 23:13:29,572 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-10-14 23:13:29,572 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-10-14 23:13:29,572 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-10-14 23:13:29,572 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-10-14 23:13:29,572 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-10-14 23:13:29,573 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-10-14 23:13:29,573 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-10-14 23:13:29,573 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-10-14 23:13:29,573 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-10-14 23:13:29,573 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-10-14 23:13:29,573 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-10-14 23:13:29,573 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-10-14 23:13:29,574 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-10-14 23:13:29,574 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-10-14 23:13:29,574 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-10-14 23:13:29,574 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-10-14 23:13:29,574 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-10-14 23:13:29,574 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-10-14 23:13:29,574 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-10-14 23:13:29,575 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-10-14 23:13:29,575 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-10-14 23:13:29,575 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-10-14 23:13:29,575 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-10-14 23:13:29,575 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-10-14 23:13:29,575 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-10-14 23:13:29,575 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2019-10-14 23:13:29,575 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2019-10-14 23:13:29,576 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-14 23:13:29,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-14 23:13:29,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 23:13:29,576 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2019-10-14 23:13:29,576 INFO L130 BoogieDeclarations]: Found specification of procedure sll_remove_last [2019-10-14 23:13:29,576 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-14 23:13:29,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 23:13:29,577 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:13:29,577 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 23:13:29,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-10-14 23:13:29,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:13:29,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:13:29,577 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 23:13:29,921 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2019-10-14 23:13:30,094 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:13:30,094 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-14 23:13:30,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:13:30 BoogieIcfgContainer [2019-10-14 23:13:30,096 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:13:30,102 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:13:30,102 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:13:30,105 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:13:30,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:13:28" (1/3) ... [2019-10-14 23:13:30,106 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65d3c55a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:13:30, skipping insertion in model container [2019-10-14 23:13:30,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:13:29" (2/3) ... [2019-10-14 23:13:30,107 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65d3c55a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:13:30, skipping insertion in model container [2019-10-14 23:13:30,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:13:30" (3/3) ... [2019-10-14 23:13:30,109 INFO L109 eAbstractionObserver]: Analyzing ICFG sll2n_remove_all_reverse.i [2019-10-14 23:13:30,122 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:13:30,132 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:13:30,143 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:13:30,175 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:13:30,176 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:13:30,176 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:13:30,176 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:13:30,176 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:13:30,177 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:13:30,177 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:13:30,177 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:13:30,200 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2019-10-14 23:13:30,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-14 23:13:30,208 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:13:30,209 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:13:30,214 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:13:30,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:13:30,220 INFO L82 PathProgramCache]: Analyzing trace with hash 852060024, now seen corresponding path program 1 times [2019-10-14 23:13:30,229 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:13:30,229 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013208519] [2019-10-14 23:13:30,230 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:13:30,230 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:13:30,230 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:13:30,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:13:30,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:13:30,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:13:30,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:13:30,466 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013208519] [2019-10-14 23:13:30,467 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:13:30,467 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:13:30,468 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705250355] [2019-10-14 23:13:30,472 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:13:30,472 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:13:30,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:13:30,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:13:30,485 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 4 states. [2019-10-14 23:13:30,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:13:30,699 INFO L93 Difference]: Finished difference Result 69 states and 86 transitions. [2019-10-14 23:13:30,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:13:30,702 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2019-10-14 23:13:30,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:13:30,716 INFO L225 Difference]: With dead ends: 69 [2019-10-14 23:13:30,716 INFO L226 Difference]: Without dead ends: 40 [2019-10-14 23:13:30,723 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:13:30,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-14 23:13:30,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2019-10-14 23:13:30,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-14 23:13:30,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2019-10-14 23:13:30,769 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 17 [2019-10-14 23:13:30,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:13:30,769 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2019-10-14 23:13:30,770 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:13:30,770 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2019-10-14 23:13:30,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-14 23:13:30,772 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:13:30,772 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:13:30,772 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:13:30,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:13:30,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1868381993, now seen corresponding path program 1 times [2019-10-14 23:13:30,774 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:13:30,774 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771137485] [2019-10-14 23:13:30,775 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:13:30,775 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:13:30,775 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:13:30,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:13:30,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:13:30,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:13:30,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:13:30,941 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771137485] [2019-10-14 23:13:30,942 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:13:30,942 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:13:30,942 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042527290] [2019-10-14 23:13:30,944 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:13:30,945 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:13:30,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:13:30,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:13:30,950 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 6 states. [2019-10-14 23:13:31,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:13:31,140 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2019-10-14 23:13:31,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:13:31,141 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2019-10-14 23:13:31,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:13:31,142 INFO L225 Difference]: With dead ends: 47 [2019-10-14 23:13:31,142 INFO L226 Difference]: Without dead ends: 43 [2019-10-14 23:13:31,143 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:13:31,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-14 23:13:31,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2019-10-14 23:13:31,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-14 23:13:31,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2019-10-14 23:13:31,153 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 17 [2019-10-14 23:13:31,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:13:31,153 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2019-10-14 23:13:31,153 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:13:31,154 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2019-10-14 23:13:31,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-14 23:13:31,155 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:13:31,155 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:13:31,155 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:13:31,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:13:31,155 INFO L82 PathProgramCache]: Analyzing trace with hash 528543346, now seen corresponding path program 1 times [2019-10-14 23:13:31,156 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:13:31,156 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253379103] [2019-10-14 23:13:31,156 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:13:31,156 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:13:31,156 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:13:31,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:13:31,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:13:31,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:13:31,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:13:31,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:13:31,394 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253379103] [2019-10-14 23:13:31,394 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:13:31,395 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-10-14 23:13:31,395 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549023615] [2019-10-14 23:13:31,395 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:13:31,396 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:13:31,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:13:31,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:13:31,397 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 9 states. [2019-10-14 23:13:31,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:13:31,762 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2019-10-14 23:13:31,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 23:13:31,763 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2019-10-14 23:13:31,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:13:31,764 INFO L225 Difference]: With dead ends: 55 [2019-10-14 23:13:31,765 INFO L226 Difference]: Without dead ends: 41 [2019-10-14 23:13:31,765 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2019-10-14 23:13:31,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-14 23:13:31,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2019-10-14 23:13:31,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-14 23:13:31,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2019-10-14 23:13:31,773 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 24 [2019-10-14 23:13:31,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:13:31,774 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2019-10-14 23:13:31,774 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:13:31,774 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2019-10-14 23:13:31,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-14 23:13:31,775 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:13:31,776 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:13:31,776 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:13:31,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:13:31,776 INFO L82 PathProgramCache]: Analyzing trace with hash -233245789, now seen corresponding path program 1 times [2019-10-14 23:13:31,776 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:13:31,777 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037122082] [2019-10-14 23:13:31,777 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:13:31,777 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:13:31,777 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:13:31,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:13:31,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:13:31,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:13:31,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:13:32,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:13:32,011 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037122082] [2019-10-14 23:13:32,012 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839809587] [2019-10-14 23:13:32,012 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:13:32,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:13:32,138 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:13:32,147 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:13:32,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 23:13:32,220 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:13:32,220 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 12 [2019-10-14 23:13:32,221 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246967903] [2019-10-14 23:13:32,222 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:13:32,222 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:13:32,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:13:32,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:13:32,222 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 5 states. [2019-10-14 23:13:32,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:13:32,277 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2019-10-14 23:13:32,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:13:32,279 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2019-10-14 23:13:32,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:13:32,281 INFO L225 Difference]: With dead ends: 59 [2019-10-14 23:13:32,281 INFO L226 Difference]: Without dead ends: 40 [2019-10-14 23:13:32,281 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:13:32,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-14 23:13:32,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2019-10-14 23:13:32,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-14 23:13:32,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2019-10-14 23:13:32,293 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 27 [2019-10-14 23:13:32,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:13:32,293 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2019-10-14 23:13:32,293 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:13:32,293 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2019-10-14 23:13:32,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-14 23:13:32,296 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:13:32,296 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:13:32,507 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:13:32,508 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:13:32,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:13:32,508 INFO L82 PathProgramCache]: Analyzing trace with hash -2086641938, now seen corresponding path program 1 times [2019-10-14 23:13:32,508 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:13:32,508 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80354959] [2019-10-14 23:13:32,509 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:13:32,509 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:13:32,509 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:13:32,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:13:32,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:13:32,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:13:32,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:13:32,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:13:32,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:13:32,708 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80354959] [2019-10-14 23:13:32,708 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638008929] [2019-10-14 23:13:32,708 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:13:32,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:13:32,812 INFO L256 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 23:13:32,815 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:13:32,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 23:13:32,843 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:13:32,844 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 13 [2019-10-14 23:13:32,844 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356613599] [2019-10-14 23:13:32,845 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 23:13:32,846 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:13:32,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 23:13:32,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:13:32,846 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 13 states. [2019-10-14 23:13:33,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:13:33,130 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2019-10-14 23:13:33,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:13:33,131 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2019-10-14 23:13:33,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:13:33,132 INFO L225 Difference]: With dead ends: 65 [2019-10-14 23:13:33,132 INFO L226 Difference]: Without dead ends: 46 [2019-10-14 23:13:33,133 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2019-10-14 23:13:33,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-14 23:13:33,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2019-10-14 23:13:33,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-14 23:13:33,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2019-10-14 23:13:33,141 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 36 [2019-10-14 23:13:33,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:13:33,141 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2019-10-14 23:13:33,141 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 23:13:33,142 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2019-10-14 23:13:33,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-14 23:13:33,144 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:13:33,144 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:13:33,348 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:13:33,349 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:13:33,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:13:33,350 INFO L82 PathProgramCache]: Analyzing trace with hash -37390333, now seen corresponding path program 2 times [2019-10-14 23:13:33,350 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:13:33,351 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769711200] [2019-10-14 23:13:33,351 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:13:33,351 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:13:33,351 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:13:33,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:13:33,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:13:33,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:13:33,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:13:33,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:13:33,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:13:33,519 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-14 23:13:33,519 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769711200] [2019-10-14 23:13:33,520 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765043276] [2019-10-14 23:13:33,520 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:13:33,638 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:13:33,639 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:13:33,641 INFO L256 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:13:33,644 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:13:33,652 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-14 23:13:33,652 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:13:33,652 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 8 [2019-10-14 23:13:33,653 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584334065] [2019-10-14 23:13:33,653 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 23:13:33,653 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:13:33,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 23:13:33,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:13:33,654 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 8 states. [2019-10-14 23:13:33,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:13:33,799 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2019-10-14 23:13:33,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:13:33,800 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 45 [2019-10-14 23:13:33,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:13:33,801 INFO L225 Difference]: With dead ends: 48 [2019-10-14 23:13:33,801 INFO L226 Difference]: Without dead ends: 44 [2019-10-14 23:13:33,802 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:13:33,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-14 23:13:33,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-10-14 23:13:33,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-14 23:13:33,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2019-10-14 23:13:33,809 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 45 [2019-10-14 23:13:33,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:13:33,809 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2019-10-14 23:13:33,809 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 23:13:33,809 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2019-10-14 23:13:33,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-10-14 23:13:33,811 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:13:33,811 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:13:34,015 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:13:34,016 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:13:34,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:13:34,017 INFO L82 PathProgramCache]: Analyzing trace with hash -271473713, now seen corresponding path program 3 times [2019-10-14 23:13:34,017 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:13:34,017 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532764695] [2019-10-14 23:13:34,018 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:13:34,018 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:13:34,018 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:13:34,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:13:34,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:13:34,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:13:34,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:13:34,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:13:34,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:13:34,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:13:34,435 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-14 23:13:34,435 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532764695] [2019-10-14 23:13:34,435 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047826015] [2019-10-14 23:13:34,436 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:13:34,565 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-14 23:13:34,565 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:13:34,567 INFO L256 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 37 conjunts are in the unsatisfiable core [2019-10-14 23:13:34,571 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:13:34,696 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:13:34,762 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:13:34,762 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 45 [2019-10-14 23:13:34,764 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:13:34,765 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:13:34,766 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-14 23:13:34,782 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:13:34,783 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 55 [2019-10-14 23:13:34,784 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:13:34,785 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:13:34,786 INFO L496 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-14 23:13:34,825 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:13:34,826 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:13:34,827 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:13:34,828 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2019-10-14 23:13:34,829 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:113, output treesize:89 [2019-10-14 23:13:34,829 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:13:34,830 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:13:34,913 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-14 23:13:34,914 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:13:34,914 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [15] total 19 [2019-10-14 23:13:34,914 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295952577] [2019-10-14 23:13:34,915 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:13:34,915 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:13:34,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:13:34,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2019-10-14 23:13:34,916 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 6 states. [2019-10-14 23:13:35,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:13:35,095 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2019-10-14 23:13:35,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:13:35,096 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2019-10-14 23:13:35,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:13:35,097 INFO L225 Difference]: With dead ends: 62 [2019-10-14 23:13:35,099 INFO L226 Difference]: Without dead ends: 46 [2019-10-14 23:13:35,099 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2019-10-14 23:13:35,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-14 23:13:35,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2019-10-14 23:13:35,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-10-14 23:13:35,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2019-10-14 23:13:35,111 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 55 [2019-10-14 23:13:35,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:13:35,112 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2019-10-14 23:13:35,115 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:13:35,115 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2019-10-14 23:13:35,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-10-14 23:13:35,116 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:13:35,117 INFO L380 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:13:35,317 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:13:35,318 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:13:35,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:13:35,318 INFO L82 PathProgramCache]: Analyzing trace with hash 278447769, now seen corresponding path program 1 times [2019-10-14 23:13:35,319 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:13:35,319 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597346230] [2019-10-14 23:13:35,319 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:13:35,320 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:13:35,320 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:13:35,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:13:35,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:13:35,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:13:35,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:13:35,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:13:35,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:13:36,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:13:36,447 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-14 23:13:36,448 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597346230] [2019-10-14 23:13:36,448 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023304213] [2019-10-14 23:13:36,448 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 [2019-10-14 23:13:36,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:13:36,618 INFO L256 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 55 conjunts are in the unsatisfiable core [2019-10-14 23:13:36,623 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:13:37,155 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:13:37,159 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 45 [2019-10-14 23:13:37,160 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:13:37,173 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:13:37,196 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:13:37,197 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 78 [2019-10-14 23:13:37,198 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-14 23:13:37,199 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:13:37,200 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:13:37,201 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2019-10-14 23:13:37,254 INFO L567 ElimStorePlain]: treesize reduction 114, result has 29.6 percent of original size [2019-10-14 23:13:37,254 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:13:37,255 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:47 [2019-10-14 23:13:37,440 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-14 23:13:37,440 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:13:37,440 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 36 [2019-10-14 23:13:37,441 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582894756] [2019-10-14 23:13:37,441 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-10-14 23:13:37,441 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:13:37,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-10-14 23:13:37,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1171, Unknown=0, NotChecked=0, Total=1260 [2019-10-14 23:13:37,443 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 36 states. [2019-10-14 23:13:39,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:13:39,338 INFO L93 Difference]: Finished difference Result 72 states and 80 transitions. [2019-10-14 23:13:39,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-14 23:13:39,339 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 59 [2019-10-14 23:13:39,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:13:39,341 INFO L225 Difference]: With dead ends: 72 [2019-10-14 23:13:39,341 INFO L226 Difference]: Without dead ends: 51 [2019-10-14 23:13:39,343 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=222, Invalid=2430, Unknown=0, NotChecked=0, Total=2652 [2019-10-14 23:13:39,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-10-14 23:13:39,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2019-10-14 23:13:39,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-14 23:13:39,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2019-10-14 23:13:39,351 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 59 [2019-10-14 23:13:39,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:13:39,351 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2019-10-14 23:13:39,351 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-10-14 23:13:39,351 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2019-10-14 23:13:39,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-10-14 23:13:39,353 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:13:39,353 INFO L380 BasicCegarLoop]: trace histogram [5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:13:39,563 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:13:39,564 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:13:39,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:13:39,565 INFO L82 PathProgramCache]: Analyzing trace with hash 932322430, now seen corresponding path program 2 times [2019-10-14 23:13:39,565 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:13:39,565 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903734129] [2019-10-14 23:13:39,566 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:13:39,566 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:13:39,566 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:13:39,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:13:39,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:13:39,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:13:40,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:13:40,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:13:40,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:13:40,949 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2019-10-14 23:13:41,141 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2019-10-14 23:13:41,334 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2019-10-14 23:13:41,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:13:41,757 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2019-10-14 23:13:42,389 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 3 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-14 23:13:42,389 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903734129] [2019-10-14 23:13:42,389 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536444196] [2019-10-14 23:13:42,389 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:13:42,530 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:13:42,531 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:13:42,535 INFO L256 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 119 conjunts are in the unsatisfiable core [2019-10-14 23:13:42,555 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:13:42,630 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-10-14 23:13:42,631 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:13:42,638 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:13:42,638 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:13:42,638 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-10-14 23:13:42,864 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 [2019-10-14 23:13:42,864 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:13:42,874 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:13:42,880 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 [2019-10-14 23:13:42,880 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 23:13:42,890 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:13:42,891 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:13:42,891 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:34, output treesize:26 [2019-10-14 23:13:42,974 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2019-10-14 23:13:42,975 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:13:42,986 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:13:43,001 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2019-10-14 23:13:43,001 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 23:13:43,012 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:13:43,015 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2019-10-14 23:13:43,016 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-10-14 23:13:43,023 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:13:43,024 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:13:43,024 INFO L221 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:32, output treesize:10 [2019-10-14 23:13:45,255 WARN L191 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 29 [2019-10-14 23:13:45,281 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:13:45,282 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 [2019-10-14 23:13:45,282 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:13:45,321 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:13:45,330 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:13:45,331 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2019-10-14 23:13:45,332 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 23:13:45,351 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:13:45,358 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:13:45,361 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2019-10-14 23:13:45,361 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-10-14 23:13:45,378 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:13:45,379 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-14 23:13:45,379 INFO L221 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:71, output treesize:43 [2019-10-14 23:13:45,508 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:13:45,508 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 1 case distinctions, treesize of input 30 treesize of output 58 [2019-10-14 23:13:45,509 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:13:45,566 INFO L567 ElimStorePlain]: treesize reduction 18, result has 79.5 percent of original size [2019-10-14 23:13:45,588 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:13:45,589 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 1 case distinctions, treesize of input 30 treesize of output 58 [2019-10-14 23:13:45,590 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 23:13:45,639 INFO L567 ElimStorePlain]: treesize reduction 26, result has 71.7 percent of original size [2019-10-14 23:13:45,640 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:13:45,641 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-14 23:13:45,641 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:66, output treesize:81 [2019-10-14 23:13:45,642 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:13:51,733 WARN L191 SmtUtils]: Spent 3.00 s on a formula simplification that was a NOOP. DAG size: 34 [2019-10-14 23:13:52,717 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:13:52,727 INFO L392 ElimStorePlain]: Different costs {12=[|v_old(#memory_$Pointer$.offset)_AFTER_CALL_23|], 28=[|v_#memory_$Pointer$.base_BEFORE_CALL_8|]} [2019-10-14 23:13:52,797 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:13:52,797 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 183 treesize of output 188 [2019-10-14 23:13:52,799 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:13:52,821 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:13:52,822 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 183 treesize of output 163 [2019-10-14 23:13:52,823 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 23:13:52,826 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:13:52,827 INFO L464 ElimStorePlain]: Eliminatee |v_#memory_$Pointer$.base_BEFORE_CALL_8| vanished before elimination [2019-10-14 23:13:52,827 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:13:52,827 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:367, output treesize:1 [2019-10-14 23:13:52,849 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 23:13:52,849 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:13:52,849 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 23] total 53 [2019-10-14 23:13:52,850 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072954639] [2019-10-14 23:13:52,851 INFO L442 AbstractCegarLoop]: Interpolant automaton has 53 states [2019-10-14 23:13:52,851 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:13:52,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2019-10-14 23:13:52,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2621, Unknown=1, NotChecked=0, Total=2756 [2019-10-14 23:13:52,853 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand 53 states. [2019-10-14 23:13:58,787 WARN L191 SmtUtils]: Spent 4.26 s on a formula simplification. DAG size of input: 68 DAG size of output: 46 [2019-10-14 23:13:59,726 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 48 [2019-10-14 23:14:00,935 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2019-10-14 23:14:01,137 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2019-10-14 23:14:01,446 WARN L191 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 67 [2019-10-14 23:14:01,693 WARN L191 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2019-10-14 23:14:03,808 WARN L191 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 85 [2019-10-14 23:14:06,068 WARN L191 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 92 [2019-10-14 23:14:08,122 WARN L191 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 89