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/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/list-simple/dll2n_prepend_equal.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fea9116 [2019-09-20 13:28:59,701 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-20 13:28:59,703 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-20 13:28:59,715 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-20 13:28:59,715 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-20 13:28:59,716 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-20 13:28:59,718 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-20 13:28:59,719 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-20 13:28:59,721 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-20 13:28:59,722 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-20 13:28:59,723 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-20 13:28:59,724 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-20 13:28:59,725 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-20 13:28:59,726 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-20 13:28:59,727 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-20 13:28:59,728 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-20 13:28:59,729 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-20 13:28:59,730 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-20 13:28:59,732 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-20 13:28:59,734 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-20 13:28:59,736 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-20 13:28:59,737 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-20 13:28:59,738 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-20 13:28:59,739 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-20 13:28:59,742 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-09-20 13:28:59,742 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-09-20 13:28:59,743 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-09-20 13:28:59,744 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-09-20 13:28:59,744 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-09-20 13:28:59,745 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-09-20 13:28:59,746 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-20 13:28:59,746 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-20 13:28:59,747 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-20 13:28:59,748 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-20 13:28:59,749 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-20 13:28:59,749 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-20 13:28:59,750 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-20 13:28:59,750 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-20 13:28:59,751 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-20 13:28:59,752 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-20 13:28:59,753 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-20 13:28:59,753 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-20 13:28:59,769 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-20 13:28:59,769 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-20 13:28:59,770 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-20 13:28:59,770 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-20 13:28:59,771 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-20 13:28:59,771 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-20 13:28:59,771 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-20 13:28:59,771 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-20 13:28:59,772 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-20 13:28:59,772 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-20 13:28:59,772 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-20 13:28:59,773 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-20 13:28:59,773 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-20 13:28:59,773 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-20 13:28:59,773 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-20 13:28:59,773 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-20 13:28:59,774 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-20 13:28:59,774 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-20 13:28:59,774 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-20 13:28:59,774 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-20 13:28:59,774 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-20 13:28:59,775 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-20 13:28:59,775 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-20 13:28:59,775 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-20 13:28:59,776 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-20 13:28:59,776 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-20 13:28:59,777 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-20 13:28:59,777 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-20 13:28:59,777 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-20 13:28:59,777 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-20 13:28:59,813 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-20 13:28:59,832 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-20 13:28:59,838 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-20 13:28:59,840 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-20 13:28:59,841 INFO L275 PluginConnector]: CDTParser initialized [2019-09-20 13:28:59,842 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-simple/dll2n_prepend_equal.i [2019-09-20 13:28:59,919 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e042aa0e/e11def5613924718b709878826485f53/FLAG402facf21 [2019-09-20 13:29:00,458 INFO L306 CDTParser]: Found 1 translation units. [2019-09-20 13:29:00,459 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-simple/dll2n_prepend_equal.i [2019-09-20 13:29:00,481 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e042aa0e/e11def5613924718b709878826485f53/FLAG402facf21 [2019-09-20 13:29:00,723 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e042aa0e/e11def5613924718b709878826485f53 [2019-09-20 13:29:00,736 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-20 13:29:00,738 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-20 13:29:00,743 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-20 13:29:00,743 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-20 13:29:00,746 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-20 13:29:00,748 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:29:00" (1/1) ... [2019-09-20 13:29:00,751 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50cabc4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:29:00, skipping insertion in model container [2019-09-20 13:29:00,751 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:29:00" (1/1) ... [2019-09-20 13:29:00,759 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-20 13:29:00,818 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-20 13:29:01,248 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:29:01,262 INFO L188 MainTranslator]: Completed pre-run [2019-09-20 13:29:01,348 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:29:01,407 INFO L192 MainTranslator]: Completed translation [2019-09-20 13:29:01,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:29:01 WrapperNode [2019-09-20 13:29:01,408 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-20 13:29:01,408 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-20 13:29:01,408 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-20 13:29:01,409 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-20 13:29:01,420 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:29:01" (1/1) ... [2019-09-20 13:29:01,421 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:29:01" (1/1) ... [2019-09-20 13:29:01,436 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:29:01" (1/1) ... [2019-09-20 13:29:01,437 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:29:01" (1/1) ... [2019-09-20 13:29:01,454 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:29:01" (1/1) ... [2019-09-20 13:29:01,459 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:29:01" (1/1) ... [2019-09-20 13:29:01,463 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:29:01" (1/1) ... [2019-09-20 13:29:01,470 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-20 13:29:01,471 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-20 13:29:01,471 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-20 13:29:01,471 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-20 13:29:01,472 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:29:01" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-20 13:29:01,532 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-20 13:29:01,532 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-20 13:29:01,532 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-09-20 13:29:01,533 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-09-20 13:29:01,533 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2019-09-20 13:29:01,533 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2019-09-20 13:29:01,533 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create [2019-09-20 13:29:01,533 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_destroy [2019-09-20 13:29:01,533 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_prepend [2019-09-20 13:29:01,534 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-20 13:29:01,534 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-20 13:29:01,534 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-09-20 13:29:01,534 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-09-20 13:29:01,534 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-09-20 13:29:01,535 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-09-20 13:29:01,535 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-09-20 13:29:01,535 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-09-20 13:29:01,535 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-09-20 13:29:01,535 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-09-20 13:29:01,535 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-09-20 13:29:01,536 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-09-20 13:29:01,536 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-09-20 13:29:01,536 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-09-20 13:29:01,536 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-09-20 13:29:01,536 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-09-20 13:29:01,536 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-09-20 13:29:01,536 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-09-20 13:29:01,537 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-09-20 13:29:01,537 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-09-20 13:29:01,537 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-09-20 13:29:01,537 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-09-20 13:29:01,537 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-09-20 13:29:01,537 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-09-20 13:29:01,538 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-09-20 13:29:01,538 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-09-20 13:29:01,538 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-09-20 13:29:01,538 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-09-20 13:29:01,538 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-09-20 13:29:01,538 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-09-20 13:29:01,538 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-09-20 13:29:01,539 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-09-20 13:29:01,539 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-09-20 13:29:01,539 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-09-20 13:29:01,539 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-09-20 13:29:01,539 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-09-20 13:29:01,539 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-09-20 13:29:01,540 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-09-20 13:29:01,540 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-09-20 13:29:01,540 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-09-20 13:29:01,540 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-09-20 13:29:01,540 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-09-20 13:29:01,540 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-09-20 13:29:01,540 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-09-20 13:29:01,541 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-09-20 13:29:01,541 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-09-20 13:29:01,541 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-09-20 13:29:01,541 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-09-20 13:29:01,541 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-09-20 13:29:01,541 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-09-20 13:29:01,542 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-09-20 13:29:01,542 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-09-20 13:29:01,542 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-09-20 13:29:01,542 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-09-20 13:29:01,542 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-09-20 13:29:01,542 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-09-20 13:29:01,543 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-09-20 13:29:01,543 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-09-20 13:29:01,543 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2019-09-20 13:29:01,543 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-09-20 13:29:01,543 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-09-20 13:29:01,543 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-09-20 13:29:01,544 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-09-20 13:29:01,544 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-09-20 13:29:01,544 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-09-20 13:29:01,544 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-09-20 13:29:01,544 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-09-20 13:29:01,544 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-20 13:29:01,544 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-09-20 13:29:01,545 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-09-20 13:29:01,545 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-09-20 13:29:01,545 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-09-20 13:29:01,545 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-09-20 13:29:01,545 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-09-20 13:29:01,545 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-09-20 13:29:01,546 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-09-20 13:29:01,546 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-09-20 13:29:01,546 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-09-20 13:29:01,546 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-09-20 13:29:01,546 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-09-20 13:29:01,546 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-09-20 13:29:01,546 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-09-20 13:29:01,547 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-09-20 13:29:01,547 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-09-20 13:29:01,547 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-09-20 13:29:01,547 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-09-20 13:29:01,547 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-09-20 13:29:01,547 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-09-20 13:29:01,548 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-09-20 13:29:01,548 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-09-20 13:29:01,548 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-09-20 13:29:01,548 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-09-20 13:29:01,548 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-09-20 13:29:01,548 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-09-20 13:29:01,549 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-09-20 13:29:01,549 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-09-20 13:29:01,549 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-09-20 13:29:01,549 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-09-20 13:29:01,549 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-09-20 13:29:01,549 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-09-20 13:29:01,550 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-09-20 13:29:01,550 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-09-20 13:29:01,550 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-09-20 13:29:01,550 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-09-20 13:29:01,550 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-09-20 13:29:01,550 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-09-20 13:29:01,550 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-09-20 13:29:01,551 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2019-09-20 13:29:01,551 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2019-09-20 13:29:01,551 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-09-20 13:29:01,551 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-09-20 13:29:01,551 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-20 13:29:01,551 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create [2019-09-20 13:29:01,552 INFO L130 BoogieDeclarations]: Found specification of procedure dll_destroy [2019-09-20 13:29:01,552 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-09-20 13:29:01,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-20 13:29:01,552 INFO L130 BoogieDeclarations]: Found specification of procedure dll_prepend [2019-09-20 13:29:01,552 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-20 13:29:01,552 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-20 13:29:01,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-09-20 13:29:01,553 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-20 13:29:01,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-20 13:29:01,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-20 13:29:01,926 INFO L683 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2019-09-20 13:29:02,102 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-20 13:29:02,103 INFO L283 CfgBuilder]: Removed 3 assume(true) statements. [2019-09-20 13:29:02,104 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:29:02 BoogieIcfgContainer [2019-09-20 13:29:02,104 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-20 13:29:02,106 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-20 13:29:02,106 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-20 13:29:02,109 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-20 13:29:02,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 01:29:00" (1/3) ... [2019-09-20 13:29:02,110 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bfcaf7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:29:02, skipping insertion in model container [2019-09-20 13:29:02,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:29:01" (2/3) ... [2019-09-20 13:29:02,111 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bfcaf7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:29:02, skipping insertion in model container [2019-09-20 13:29:02,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:29:02" (3/3) ... [2019-09-20 13:29:02,113 INFO L109 eAbstractionObserver]: Analyzing ICFG dll2n_prepend_equal.i [2019-09-20 13:29:02,123 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-20 13:29:02,132 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-20 13:29:02,147 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-20 13:29:02,174 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-20 13:29:02,174 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-20 13:29:02,174 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-20 13:29:02,175 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-20 13:29:02,175 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-20 13:29:02,175 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-20 13:29:02,175 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-20 13:29:02,175 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-20 13:29:02,192 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states. [2019-09-20 13:29:02,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-09-20 13:29:02,203 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:29:02,205 INFO L407 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] [2019-09-20 13:29:02,207 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:29:02,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:29:02,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1196981672, now seen corresponding path program 1 times [2019-09-20 13:29:02,216 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:29:02,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:29:02,281 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:29:02,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:29:02,281 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:29:02,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:29:02,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:29:02,449 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:29:02,450 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-20 13:29:02,450 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:29:02,458 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-20 13:29:02,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-20 13:29:02,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-20 13:29:02,477 INFO L87 Difference]: Start difference. First operand 50 states. Second operand 2 states. [2019-09-20 13:29:02,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:29:02,496 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2019-09-20 13:29:02,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-20 13:29:02,498 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 30 [2019-09-20 13:29:02,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:29:02,507 INFO L225 Difference]: With dead ends: 50 [2019-09-20 13:29:02,507 INFO L226 Difference]: Without dead ends: 36 [2019-09-20 13:29:02,509 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-20 13:29:02,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-09-20 13:29:02,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-09-20 13:29:02,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-09-20 13:29:02,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2019-09-20 13:29:02,553 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 30 [2019-09-20 13:29:02,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:29:02,553 INFO L475 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2019-09-20 13:29:02,554 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-20 13:29:02,554 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2019-09-20 13:29:02,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-09-20 13:29:02,555 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:29:02,555 INFO L407 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] [2019-09-20 13:29:02,556 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:29:02,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:29:02,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1196990321, now seen corresponding path program 1 times [2019-09-20 13:29:02,557 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:29:02,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:29:02,562 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:29:02,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:29:02,562 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:29:02,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:29:02,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:29:02,871 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:29:02,871 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2019-09-20 13:29:02,871 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:29:02,873 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-20 13:29:02,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-20 13:29:02,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-09-20 13:29:02,874 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 10 states. [2019-09-20 13:29:03,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:29:03,062 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2019-09-20 13:29:03,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-20 13:29:03,063 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2019-09-20 13:29:03,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:29:03,065 INFO L225 Difference]: With dead ends: 40 [2019-09-20 13:29:03,065 INFO L226 Difference]: Without dead ends: 40 [2019-09-20 13:29:03,066 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2019-09-20 13:29:03,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-09-20 13:29:03,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2019-09-20 13:29:03,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-09-20 13:29:03,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2019-09-20 13:29:03,072 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 30 [2019-09-20 13:29:03,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:29:03,073 INFO L475 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2019-09-20 13:29:03,073 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-20 13:29:03,073 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2019-09-20 13:29:03,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-09-20 13:29:03,075 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:29:03,075 INFO L407 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] [2019-09-20 13:29:03,075 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:29:03,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:29:03,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1196988647, now seen corresponding path program 1 times [2019-09-20 13:29:03,076 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:29:03,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:29:03,080 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:29:03,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:29:03,080 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:29:03,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:29:03,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:29:03,220 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:29:03,220 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-20 13:29:03,221 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:29:03,222 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-20 13:29:03,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-20 13:29:03,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-20 13:29:03,223 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 5 states. [2019-09-20 13:29:03,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:29:03,270 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2019-09-20 13:29:03,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-20 13:29:03,271 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2019-09-20 13:29:03,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:29:03,272 INFO L225 Difference]: With dead ends: 45 [2019-09-20 13:29:03,272 INFO L226 Difference]: Without dead ends: 42 [2019-09-20 13:29:03,272 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-20 13:29:03,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-09-20 13:29:03,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2019-09-20 13:29:03,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-09-20 13:29:03,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2019-09-20 13:29:03,278 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 30 [2019-09-20 13:29:03,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:29:03,279 INFO L475 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2019-09-20 13:29:03,279 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-20 13:29:03,279 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2019-09-20 13:29:03,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-09-20 13:29:03,280 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:29:03,280 INFO L407 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] [2019-09-20 13:29:03,281 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:29:03,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:29:03,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1608181309, now seen corresponding path program 1 times [2019-09-20 13:29:03,281 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:29:03,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:29:03,285 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:29:03,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:29:03,285 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:29:03,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:29:03,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:29:03,356 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:29:03,357 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-20 13:29:03,357 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:29:03,358 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-20 13:29:03,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-20 13:29:03,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 13:29:03,359 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 3 states. [2019-09-20 13:29:03,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:29:03,382 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2019-09-20 13:29:03,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-20 13:29:03,386 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 35 [2019-09-20 13:29:03,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:29:03,387 INFO L225 Difference]: With dead ends: 42 [2019-09-20 13:29:03,387 INFO L226 Difference]: Without dead ends: 42 [2019-09-20 13:29:03,388 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 13:29:03,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-09-20 13:29:03,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2019-09-20 13:29:03,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-09-20 13:29:03,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2019-09-20 13:29:03,394 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 35 [2019-09-20 13:29:03,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:29:03,395 INFO L475 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2019-09-20 13:29:03,395 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-20 13:29:03,395 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2019-09-20 13:29:03,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-09-20 13:29:03,396 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:29:03,396 INFO L407 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] [2019-09-20 13:29:03,397 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:29:03,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:29:03,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1474167803, now seen corresponding path program 1 times [2019-09-20 13:29:03,397 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:29:03,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:29:03,401 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:29:03,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:29:03,401 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:29:03,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:29:03,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:29:03,488 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:29:03,488 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-20 13:29:03,489 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 36 with the following transitions: [2019-09-20 13:29:03,492 INFO L207 CegarAbsIntRunner]: [21], [27], [29], [30], [31], [32], [33], [35], [37], [46], [49], [62], [67], [74], [76], [82], [84], [89], [91], [95], [96], [97], [99], [102], [106], [107], [113], [114], [115], [116], [121], [122], [123], [124], [125] [2019-09-20 13:29:03,547 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-20 13:29:03,547 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-20 13:29:03,640 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-20 13:29:03,642 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 21 root evaluator evaluations with a maximum evaluation depth of 0. Performed 21 inverse root evaluator evaluations with a maximum inverse evaluation depth of 0. Never found a fixpoint. Largest state had 32 variables. [2019-09-20 13:29:03,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:29:03,647 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-20 13:29:03,683 INFO L227 lantSequenceWeakener]: Weakened 4 states. On average, predicates are now at 100% of their original sizes. [2019-09-20 13:29:03,683 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-20 13:29:03,686 INFO L420 sIntCurrentIteration]: We unified 34 AI predicates to 34 [2019-09-20 13:29:03,686 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-20 13:29:03,687 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-20 13:29:03,687 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 6 [2019-09-20 13:29:03,687 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:29:03,687 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-20 13:29:03,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-20 13:29:03,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-20 13:29:03,688 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 2 states. [2019-09-20 13:29:03,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:29:03,689 INFO L93 Difference]: Finished difference Result 6 states and 5 transitions. [2019-09-20 13:29:03,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-20 13:29:03,689 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 35 [2019-09-20 13:29:03,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:29:03,690 INFO L225 Difference]: With dead ends: 6 [2019-09-20 13:29:03,690 INFO L226 Difference]: Without dead ends: 0 [2019-09-20 13:29:03,690 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-20 13:29:03,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-20 13:29:03,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-20 13:29:03,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-20 13:29:03,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-20 13:29:03,691 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 35 [2019-09-20 13:29:03,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:29:03,692 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-20 13:29:03,692 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-20 13:29:03,692 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-20 13:29:03,692 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-20 13:29:03,697 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.09 01:29:03 BoogieIcfgContainer [2019-09-20 13:29:03,697 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-20 13:29:03,700 INFO L168 Benchmark]: Toolchain (without parser) took 2961.66 ms. Allocated memory was 137.9 MB in the beginning and 219.2 MB in the end (delta: 81.3 MB). Free memory was 84.6 MB in the beginning and 113.6 MB in the end (delta: -29.0 MB). Peak memory consumption was 52.3 MB. Max. memory is 7.1 GB. [2019-09-20 13:29:03,701 INFO L168 Benchmark]: CDTParser took 1.19 ms. Allocated memory is still 137.9 MB. Free memory was 103.8 MB in the beginning and 103.6 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-20 13:29:03,702 INFO L168 Benchmark]: CACSL2BoogieTranslator took 665.34 ms. Allocated memory was 137.9 MB in the beginning and 198.7 MB in the end (delta: 60.8 MB). Free memory was 84.2 MB in the beginning and 160.0 MB in the end (delta: -75.8 MB). Peak memory consumption was 20.8 MB. Max. memory is 7.1 GB. [2019-09-20 13:29:03,703 INFO L168 Benchmark]: Boogie Preprocessor took 62.19 ms. Allocated memory is still 198.7 MB. Free memory was 160.0 MB in the beginning and 156.8 MB in the end (delta: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 7.1 GB. [2019-09-20 13:29:03,704 INFO L168 Benchmark]: RCFGBuilder took 633.58 ms. Allocated memory is still 198.7 MB. Free memory was 156.8 MB in the beginning and 107.4 MB in the end (delta: 49.4 MB). Peak memory consumption was 49.4 MB. Max. memory is 7.1 GB. [2019-09-20 13:29:03,705 INFO L168 Benchmark]: TraceAbstraction took 1591.74 ms. Allocated memory was 198.7 MB in the beginning and 219.2 MB in the end (delta: 20.4 MB). Free memory was 107.4 MB in the beginning and 113.6 MB in the end (delta: -6.2 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. [2019-09-20 13:29:03,709 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.19 ms. Allocated memory is still 137.9 MB. Free memory was 103.8 MB in the beginning and 103.6 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 665.34 ms. Allocated memory was 137.9 MB in the beginning and 198.7 MB in the end (delta: 60.8 MB). Free memory was 84.2 MB in the beginning and 160.0 MB in the end (delta: -75.8 MB). Peak memory consumption was 20.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 62.19 ms. Allocated memory is still 198.7 MB. Free memory was 160.0 MB in the beginning and 156.8 MB in the end (delta: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 633.58 ms. Allocated memory is still 198.7 MB. Free memory was 156.8 MB in the beginning and 107.4 MB in the end (delta: 49.4 MB). Peak memory consumption was 49.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1591.74 ms. Allocated memory was 198.7 MB in the beginning and 219.2 MB in the end (delta: 20.4 MB). Free memory was 107.4 MB in the beginning and 113.6 MB in the end (delta: -6.2 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 627]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 57 locations, 1 error locations. SAFE Result, 1.5s OverallTime, 5 OverallIterations, 1 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 168 SDtfs, 37 SDslu, 351 SDs, 0 SdLazy, 99 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 1 AbstIntIterations, 1 AbstIntStrong, 0.9705882352941176 AbsIntWeakeningRatio, 1.6764705882352942 AbsIntAvgWeakeningVarsNumRemoved, 0.17647058823529413 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 8 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 160 NumberOfCodeBlocks, 160 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 155 ConstructedInterpolants, 0 QuantifiedInterpolants, 8777 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 4 PerfectInterpolantSequences, 1/2 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...