/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-ext3-properties/dll_nullified-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 11:21:29,384 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 11:21:29,388 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 11:21:29,407 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 11:21:29,407 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 11:21:29,409 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 11:21:29,411 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 11:21:29,422 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 11:21:29,426 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 11:21:29,429 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 11:21:29,431 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 11:21:29,434 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 11:21:29,434 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 11:21:29,437 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 11:21:29,439 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 11:21:29,440 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 11:21:29,442 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 11:21:29,443 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 11:21:29,444 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 11:21:29,449 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 11:21:29,455 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 11:21:29,459 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 11:21:29,460 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 11:21:29,461 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 11:21:29,463 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-07 11:21:29,463 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-07 11:21:29,464 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-07 11:21:29,466 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-07 11:21:29,467 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-07 11:21:29,468 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-07 11:21:29,469 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-07 11:21:29,469 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-07 11:21:29,471 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-07 11:21:29,471 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-07 11:21:29,473 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-07 11:21:29,473 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-07 11:21:29,473 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-07 11:21:29,474 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-07 11:21:29,474 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 11:21:29,475 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 11:21:29,476 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 11:21:29,477 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 [2020-07-07 11:21:29,515 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 11:21:29,516 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 11:21:29,517 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-07 11:21:29,517 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-07 11:21:29,517 INFO L138 SettingsManager]: * Use SBE=true [2020-07-07 11:21:29,518 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 11:21:29,518 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 11:21:29,518 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 11:21:29,523 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 11:21:29,524 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 11:21:29,524 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 11:21:29,524 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 11:21:29,524 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 11:21:29,524 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 11:21:29,525 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 11:21:29,525 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 11:21:29,525 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 11:21:29,525 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 11:21:29,525 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-07 11:21:29,526 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 11:21:29,526 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 11:21:29,526 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 11:21:29,528 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 11:21:29,528 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-07 11:21:29,528 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-07 11:21:29,528 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-07 11:21:29,529 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-07 11:21:29,529 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 11:21:29,529 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-07 11:21:29,529 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-07 11:21:29,844 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 11:21:29,859 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 11:21:29,863 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 11:21:29,864 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 11:21:29,865 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 11:21:29,866 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/dll_nullified-1.i [2020-07-07 11:21:29,943 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a210bb582/cfe92ce3df57476287e06281f97f3299/FLAG1d598eb64 [2020-07-07 11:21:30,504 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 11:21:30,505 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-ext3-properties/dll_nullified-1.i [2020-07-07 11:21:30,519 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a210bb582/cfe92ce3df57476287e06281f97f3299/FLAG1d598eb64 [2020-07-07 11:21:30,782 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a210bb582/cfe92ce3df57476287e06281f97f3299 [2020-07-07 11:21:30,790 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 11:21:30,792 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 11:21:30,793 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 11:21:30,793 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 11:21:30,797 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 11:21:30,798 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:21:30" (1/1) ... [2020-07-07 11:21:30,803 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cbfc568 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:21:30, skipping insertion in model container [2020-07-07 11:21:30,803 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:21:30" (1/1) ... [2020-07-07 11:21:30,812 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 11:21:30,851 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 11:21:31,362 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:21:31,378 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 11:21:31,455 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:21:31,515 INFO L208 MainTranslator]: Completed translation [2020-07-07 11:21:31,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:21:31 WrapperNode [2020-07-07 11:21:31,516 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 11:21:31,516 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 11:21:31,516 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 11:21:31,517 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 11:21:31,531 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:21:31" (1/1) ... [2020-07-07 11:21:31,531 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:21:31" (1/1) ... [2020-07-07 11:21:31,548 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:21:31" (1/1) ... [2020-07-07 11:21:31,549 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:21:31" (1/1) ... [2020-07-07 11:21:31,565 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:21:31" (1/1) ... [2020-07-07 11:21:31,571 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:21:31" (1/1) ... [2020-07-07 11:21:31,574 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:21:31" (1/1) ... [2020-07-07 11:21:31,581 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 11:21:31,581 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 11:21:31,582 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 11:21:31,582 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 11:21:31,583 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:21:31" (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 [2020-07-07 11:21:31,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 11:21:31,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 11:21:31,645 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-07-07 11:21:31,645 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-07-07 11:21:31,645 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-07-07 11:21:31,645 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create [2020-07-07 11:21:31,645 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 11:21:31,646 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 11:21:31,646 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 11:21:31,646 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-07-07 11:21:31,646 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-07-07 11:21:31,646 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-07 11:21:31,646 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-07 11:21:31,647 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-07 11:21:31,647 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-07 11:21:31,647 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-07 11:21:31,647 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-07 11:21:31,647 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-07 11:21:31,648 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-07 11:21:31,648 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-07 11:21:31,648 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-07 11:21:31,648 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-07 11:21:31,648 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-07 11:21:31,648 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-07 11:21:31,648 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-07 11:21:31,649 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-07 11:21:31,649 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-07 11:21:31,649 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-07 11:21:31,649 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-07 11:21:31,649 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-07 11:21:31,649 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-07 11:21:31,650 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-07 11:21:31,650 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-07 11:21:31,650 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-07 11:21:31,650 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-07 11:21:31,650 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-07 11:21:31,650 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-07 11:21:31,651 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-07 11:21:31,651 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-07 11:21:31,651 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-07 11:21:31,651 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-07 11:21:31,651 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-07 11:21:31,651 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-07 11:21:31,651 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-07 11:21:31,652 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-07 11:21:31,652 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-07 11:21:31,652 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-07 11:21:31,652 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-07 11:21:31,652 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-07 11:21:31,652 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-07 11:21:31,652 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-07 11:21:31,652 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-07 11:21:31,652 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-07 11:21:31,652 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-07 11:21:31,653 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-07 11:21:31,653 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-07 11:21:31,653 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-07 11:21:31,653 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-07 11:21:31,653 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-07 11:21:31,653 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-07 11:21:31,653 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-07 11:21:31,653 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-07 11:21:31,653 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-07 11:21:31,653 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-07 11:21:31,654 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-07 11:21:31,654 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-07-07 11:21:31,654 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-07 11:21:31,654 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-07 11:21:31,654 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-07 11:21:31,654 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-07 11:21:31,654 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-07 11:21:31,655 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-07 11:21:31,655 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-07 11:21:31,655 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-07 11:21:31,655 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-07 11:21:31,655 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-07 11:21:31,655 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-07 11:21:31,656 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-07 11:21:31,656 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-07 11:21:31,656 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-07 11:21:31,656 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-07 11:21:31,656 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-07 11:21:31,656 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-07 11:21:31,657 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-07 11:21:31,657 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-07 11:21:31,657 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-07 11:21:31,657 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-07 11:21:31,657 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-07 11:21:31,657 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-07 11:21:31,657 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-07 11:21:31,657 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-07 11:21:31,658 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-07 11:21:31,658 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-07 11:21:31,658 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-07 11:21:31,658 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-07 11:21:31,658 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-07 11:21:31,658 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-07 11:21:31,659 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-07 11:21:31,659 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-07 11:21:31,659 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-07 11:21:31,659 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-07 11:21:31,659 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-07 11:21:31,659 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-07 11:21:31,659 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-07 11:21:31,659 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-07 11:21:31,659 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-07 11:21:31,659 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-07 11:21:31,660 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-07 11:21:31,660 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-07 11:21:31,660 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-07 11:21:31,660 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-07 11:21:31,660 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-07 11:21:31,660 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-07 11:21:31,660 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-07 11:21:31,660 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-07-07 11:21:31,660 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create [2020-07-07 11:21:31,660 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-07 11:21:31,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-07 11:21:31,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-07 11:21:31,665 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 11:21:31,666 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-07 11:21:31,666 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-07 11:21:31,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-07 11:21:31,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 11:21:31,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 11:21:32,005 INFO L728 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-07-07 11:21:32,199 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 11:21:32,199 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-07 11:21:32,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:21:32 BoogieIcfgContainer [2020-07-07 11:21:32,204 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 11:21:32,205 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 11:21:32,205 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 11:21:32,208 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 11:21:32,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 11:21:30" (1/3) ... [2020-07-07 11:21:32,210 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43b047e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:21:32, skipping insertion in model container [2020-07-07 11:21:32,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:21:31" (2/3) ... [2020-07-07 11:21:32,210 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43b047e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:21:32, skipping insertion in model container [2020-07-07 11:21:32,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:21:32" (3/3) ... [2020-07-07 11:21:32,212 INFO L109 eAbstractionObserver]: Analyzing ICFG dll_nullified-1.i [2020-07-07 11:21:32,223 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-07 11:21:32,232 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 11:21:32,246 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 11:21:32,270 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 11:21:32,270 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 11:21:32,271 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-07 11:21:32,271 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 11:21:32,271 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 11:21:32,271 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 11:21:32,272 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 11:21:32,272 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 11:21:32,289 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-07-07 11:21:32,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-07 11:21:32,296 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:21:32,297 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:21:32,297 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:21:32,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:21:32,302 INFO L82 PathProgramCache]: Analyzing trace with hash 248267832, now seen corresponding path program 1 times [2020-07-07 11:21:32,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:21:32,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788819531] [2020-07-07 11:21:32,310 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:21:32,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:21:32,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:21:32,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:21:32,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:21:32,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788819531] [2020-07-07 11:21:32,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:21:32,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-07 11:21:32,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903789690] [2020-07-07 11:21:32,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-07 11:21:32,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:21:32,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-07 11:21:32,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-07 11:21:32,620 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 7 states. [2020-07-07 11:21:32,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:21:32,947 INFO L93 Difference]: Finished difference Result 73 states and 101 transitions. [2020-07-07 11:21:32,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-07 11:21:32,949 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-07-07 11:21:32,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:21:32,958 INFO L225 Difference]: With dead ends: 73 [2020-07-07 11:21:32,959 INFO L226 Difference]: Without dead ends: 39 [2020-07-07 11:21:32,962 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-07-07 11:21:32,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-07 11:21:33,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2020-07-07 11:21:33,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-07 11:21:33,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2020-07-07 11:21:33,008 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 20 [2020-07-07 11:21:33,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:21:33,008 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2020-07-07 11:21:33,008 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-07 11:21:33,009 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2020-07-07 11:21:33,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-07 11:21:33,010 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:21:33,010 INFO L422 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] [2020-07-07 11:21:33,010 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 11:21:33,011 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:21:33,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:21:33,011 INFO L82 PathProgramCache]: Analyzing trace with hash 215856973, now seen corresponding path program 1 times [2020-07-07 11:21:33,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:21:33,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972626234] [2020-07-07 11:21:33,012 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:21:33,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:21:33,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:21:33,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:21:33,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:21:33,184 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972626234] [2020-07-07 11:21:33,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:21:33,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-07 11:21:33,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571124131] [2020-07-07 11:21:33,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-07 11:21:33,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:21:33,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-07 11:21:33,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:21:33,188 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand 6 states. [2020-07-07 11:21:33,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:21:33,364 INFO L93 Difference]: Finished difference Result 63 states and 83 transitions. [2020-07-07 11:21:33,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-07 11:21:33,364 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-07-07 11:21:33,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:21:33,366 INFO L225 Difference]: With dead ends: 63 [2020-07-07 11:21:33,366 INFO L226 Difference]: Without dead ends: 39 [2020-07-07 11:21:33,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-07-07 11:21:33,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-07 11:21:33,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-07-07 11:21:33,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-07 11:21:33,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2020-07-07 11:21:33,376 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 27 [2020-07-07 11:21:33,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:21:33,376 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2020-07-07 11:21:33,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-07 11:21:33,377 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2020-07-07 11:21:33,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-07 11:21:33,378 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:21:33,378 INFO L422 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] [2020-07-07 11:21:33,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 11:21:33,378 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:21:33,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:21:33,379 INFO L82 PathProgramCache]: Analyzing trace with hash -795260277, now seen corresponding path program 1 times [2020-07-07 11:21:33,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:21:33,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351350008] [2020-07-07 11:21:33,380 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:21:33,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:21:33,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:21:33,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:21:33,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:21:33,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351350008] [2020-07-07 11:21:33,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24017349] [2020-07-07 11:21:33,522 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 [2020-07-07 11:21:33,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:21:33,653 INFO L264 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-07 11:21:33,660 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:21:33,702 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:21:33,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-07 11:21:33,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-07 11:21:33,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2020-07-07 11:21:33,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892692142] [2020-07-07 11:21:33,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:21:33,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:21:33,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:21:33,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-07-07 11:21:33,722 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand 4 states. [2020-07-07 11:21:33,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:21:33,755 INFO L93 Difference]: Finished difference Result 55 states and 74 transitions. [2020-07-07 11:21:33,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:21:33,756 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-07-07 11:21:33,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:21:33,759 INFO L225 Difference]: With dead ends: 55 [2020-07-07 11:21:33,759 INFO L226 Difference]: Without dead ends: 42 [2020-07-07 11:21:33,760 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-07-07 11:21:33,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-07 11:21:33,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-07-07 11:21:33,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-07 11:21:33,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2020-07-07 11:21:33,769 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 27 [2020-07-07 11:21:33,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:21:33,769 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2020-07-07 11:21:33,769 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:21:33,770 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2020-07-07 11:21:33,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-07 11:21:33,771 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:21:33,771 INFO L422 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] [2020-07-07 11:21:33,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-07 11:21:33,987 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:21:33,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:21:33,988 INFO L82 PathProgramCache]: Analyzing trace with hash -795262199, now seen corresponding path program 1 times [2020-07-07 11:21:33,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:21:33,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402190609] [2020-07-07 11:21:33,990 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:21:34,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:21:34,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:21:34,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:21:34,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:21:34,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402190609] [2020-07-07 11:21:34,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481408941] [2020-07-07 11:21:34,138 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 [2020-07-07 11:21:34,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:21:34,247 INFO L264 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-07 11:21:34,249 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:21:34,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:21:34,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:21:34,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 9 [2020-07-07 11:21:34,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939266394] [2020-07-07 11:21:34,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-07 11:21:34,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:21:34,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-07 11:21:34,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-07-07 11:21:34,286 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand 9 states. [2020-07-07 11:21:34,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:21:34,499 INFO L93 Difference]: Finished difference Result 69 states and 88 transitions. [2020-07-07 11:21:34,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-07 11:21:34,500 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-07-07 11:21:34,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:21:34,501 INFO L225 Difference]: With dead ends: 69 [2020-07-07 11:21:34,501 INFO L226 Difference]: Without dead ends: 49 [2020-07-07 11:21:34,502 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-07-07 11:21:34,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-07 11:21:34,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2020-07-07 11:21:34,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-07 11:21:34,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2020-07-07 11:21:34,509 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 27 [2020-07-07 11:21:34,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:21:34,509 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2020-07-07 11:21:34,509 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-07 11:21:34,509 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2020-07-07 11:21:34,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-07 11:21:34,510 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:21:34,511 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:21:34,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:21:34,726 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:21:34,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:21:34,727 INFO L82 PathProgramCache]: Analyzing trace with hash 260011544, now seen corresponding path program 1 times [2020-07-07 11:21:34,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:21:34,728 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22081189] [2020-07-07 11:21:34,729 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:21:34,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:21:34,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:21:34,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:21:34,860 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:21:34,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22081189] [2020-07-07 11:21:34,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196522076] [2020-07-07 11:21:34,861 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:21:34,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:21:34,986 INFO L264 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-07 11:21:34,990 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:21:35,028 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:21:35,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:21:35,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 10 [2020-07-07 11:21:35,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509896630] [2020-07-07 11:21:35,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-07 11:21:35,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:21:35,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-07 11:21:35,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-07-07 11:21:35,033 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand 10 states. [2020-07-07 11:21:35,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:21:35,250 INFO L93 Difference]: Finished difference Result 76 states and 97 transitions. [2020-07-07 11:21:35,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-07 11:21:35,250 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-07-07 11:21:35,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:21:35,252 INFO L225 Difference]: With dead ends: 76 [2020-07-07 11:21:35,252 INFO L226 Difference]: Without dead ends: 56 [2020-07-07 11:21:35,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-07-07 11:21:35,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-07-07 11:21:35,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2020-07-07 11:21:35,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-07 11:21:35,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2020-07-07 11:21:35,260 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 34 [2020-07-07 11:21:35,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:21:35,260 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2020-07-07 11:21:35,260 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-07 11:21:35,260 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2020-07-07 11:21:35,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-07 11:21:35,262 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:21:35,262 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:21:35,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:21:35,476 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:21:35,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:21:35,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1408992297, now seen corresponding path program 2 times [2020-07-07 11:21:35,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:21:35,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277600140] [2020-07-07 11:21:35,478 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:21:35,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:21:35,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:21:35,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:21:35,643 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:21:35,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277600140] [2020-07-07 11:21:35,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231560206] [2020-07-07 11:21:35,644 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:21:35,748 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 11:21:35,748 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:21:35,750 INFO L264 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-07 11:21:35,752 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:21:35,774 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:21:35,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:21:35,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 11 [2020-07-07 11:21:35,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233676480] [2020-07-07 11:21:35,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-07 11:21:35,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:21:35,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-07 11:21:35,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-07-07 11:21:35,777 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand 11 states. [2020-07-07 11:21:36,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:21:36,006 INFO L93 Difference]: Finished difference Result 83 states and 106 transitions. [2020-07-07 11:21:36,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-07 11:21:36,008 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-07-07 11:21:36,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:21:36,010 INFO L225 Difference]: With dead ends: 83 [2020-07-07 11:21:36,013 INFO L226 Difference]: Without dead ends: 63 [2020-07-07 11:21:36,014 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-07-07 11:21:36,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-07 11:21:36,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2020-07-07 11:21:36,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-07 11:21:36,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2020-07-07 11:21:36,027 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 41 [2020-07-07 11:21:36,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:21:36,029 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2020-07-07 11:21:36,029 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-07 11:21:36,029 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2020-07-07 11:21:36,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-07 11:21:36,031 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:21:36,031 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:21:36,246 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:21:36,247 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:21:36,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:21:36,247 INFO L82 PathProgramCache]: Analyzing trace with hash -2107133704, now seen corresponding path program 3 times [2020-07-07 11:21:36,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:21:36,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063795034] [2020-07-07 11:21:36,249 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:21:36,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:21:36,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:21:36,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:21:36,424 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:21:36,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063795034] [2020-07-07 11:21:36,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58903092] [2020-07-07 11:21:36,425 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:21:37,047 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-07-07 11:21:37,048 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:21:37,052 INFO L264 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 29 conjunts are in the unsatisfiable core [2020-07-07 11:21:37,056 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:21:37,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:21:37,141 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2020-07-07 11:21:37,142 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:21:37,152 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:21:37,153 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:21:37,153 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:23 [2020-07-07 11:21:37,185 INFO L440 ElimStorePlain]: Different costs {2=[|v_#memory_int_21|], 10=[|v_#memory_int_23|]} [2020-07-07 11:21:37,190 INFO L544 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-07 11:21:37,208 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:21:37,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:21:37,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:21:37,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:21:37,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:21:37,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:21:37,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:21:37,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:21:37,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:21:37,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:21:37,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:21:37,227 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:21:37,227 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 41 [2020-07-07 11:21:37,228 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-07 11:21:37,241 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:21:37,242 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:21:37,242 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:66, output treesize:23 [2020-07-07 11:21:37,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:21:37,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:21:37,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:21:37,261 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:21:37,261 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 23 [2020-07-07 11:21:37,263 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:21:37,269 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:21:37,270 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:21:37,271 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:20 [2020-07-07 11:21:37,418 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-07 11:21:37,452 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 30 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-07 11:21:37,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:21:37,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2020-07-07 11:21:37,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513156926] [2020-07-07 11:21:37,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-07 11:21:37,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:21:37,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-07 11:21:37,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2020-07-07 11:21:37,454 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand 21 states. [2020-07-07 11:21:38,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:21:38,837 INFO L93 Difference]: Finished difference Result 104 states and 135 transitions. [2020-07-07 11:21:38,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-07 11:21:38,837 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 48 [2020-07-07 11:21:38,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:21:38,839 INFO L225 Difference]: With dead ends: 104 [2020-07-07 11:21:38,839 INFO L226 Difference]: Without dead ends: 84 [2020-07-07 11:21:38,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=278, Invalid=1444, Unknown=0, NotChecked=0, Total=1722 [2020-07-07 11:21:38,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-07-07 11:21:38,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 67. [2020-07-07 11:21:38,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-07-07 11:21:38,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 84 transitions. [2020-07-07 11:21:38,848 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 84 transitions. Word has length 48 [2020-07-07 11:21:38,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:21:38,849 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 84 transitions. [2020-07-07 11:21:38,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-07 11:21:38,849 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 84 transitions. [2020-07-07 11:21:38,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-07 11:21:38,850 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:21:38,850 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:21:39,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-07-07 11:21:39,059 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:21:39,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:21:39,060 INFO L82 PathProgramCache]: Analyzing trace with hash 895583181, now seen corresponding path program 1 times [2020-07-07 11:21:39,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:21:39,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898349777] [2020-07-07 11:21:39,061 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:21:39,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 11:21:39,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 11:21:39,338 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-07-07 11:21:39,339 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-07 11:21:39,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-07 11:21:39,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.07 11:21:39 BoogieIcfgContainer [2020-07-07 11:21:39,392 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-07 11:21:39,398 INFO L168 Benchmark]: Toolchain (without parser) took 8602.26 ms. Allocated memory was 139.5 MB in the beginning and 310.4 MB in the end (delta: 170.9 MB). Free memory was 103.4 MB in the beginning and 269.6 MB in the end (delta: -166.2 MB). Peak memory consumption was 161.2 MB. Max. memory is 7.1 GB. [2020-07-07 11:21:39,399 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 139.5 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-07 11:21:39,400 INFO L168 Benchmark]: CACSL2BoogieTranslator took 722.73 ms. Allocated memory was 139.5 MB in the beginning and 203.9 MB in the end (delta: 64.5 MB). Free memory was 103.2 MB in the beginning and 170.8 MB in the end (delta: -67.6 MB). Peak memory consumption was 26.9 MB. Max. memory is 7.1 GB. [2020-07-07 11:21:39,403 INFO L168 Benchmark]: Boogie Preprocessor took 64.76 ms. Allocated memory is still 203.9 MB. Free memory was 170.8 MB in the beginning and 167.5 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 7.1 GB. [2020-07-07 11:21:39,404 INFO L168 Benchmark]: RCFGBuilder took 622.41 ms. Allocated memory is still 203.9 MB. Free memory was 167.5 MB in the beginning and 122.0 MB in the end (delta: 45.6 MB). Peak memory consumption was 45.6 MB. Max. memory is 7.1 GB. [2020-07-07 11:21:39,405 INFO L168 Benchmark]: TraceAbstraction took 7187.58 ms. Allocated memory was 203.9 MB in the beginning and 310.4 MB in the end (delta: 106.4 MB). Free memory was 121.3 MB in the beginning and 269.6 MB in the end (delta: -148.3 MB). Peak memory consumption was 114.6 MB. Max. memory is 7.1 GB. [2020-07-07 11:21:39,413 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 139.5 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 722.73 ms. Allocated memory was 139.5 MB in the beginning and 203.9 MB in the end (delta: 64.5 MB). Free memory was 103.2 MB in the beginning and 170.8 MB in the end (delta: -67.6 MB). Peak memory consumption was 26.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 64.76 ms. Allocated memory is still 203.9 MB. Free memory was 170.8 MB in the beginning and 167.5 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 622.41 ms. Allocated memory is still 203.9 MB. Free memory was 167.5 MB in the beginning and 122.0 MB in the end (delta: 45.6 MB). Peak memory consumption was 45.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7187.58 ms. Allocated memory was 203.9 MB in the beginning and 310.4 MB in the end (delta: 106.4 MB). Free memory was 121.3 MB in the beginning and 269.6 MB in the end (delta: -148.3 MB). Peak memory consumption was 114.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 605]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L588] const int len = 5; VAL [len=5] [L589] CALL, EXPR dll_create(len) VAL [\old(len)=5] [L568] DLL head = ((void *)0); VAL [\old(len)=5, head={0:0}, len=5] [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); VAL [\old(len)=5, head={0:0}, len=5, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L571] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=5, head={0:0}, len=5, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 VAL [\old(len)=5, __VERIFIER_nondet_int()=5, __VERIFIER_nondet_int() == len? 1 : 0=1, head={0:0}, len=5, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) VAL [\old(len)=5, head={0:0}, len=5, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L579] COND FALSE !(\read(head)) VAL [\old(len)=5, head={0:0}, len=5, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L582] head = new_head [L583] len-- VAL [\old(len)=5, head={-1:0}, len=4, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); VAL [\old(len)=5, head={-1:0}, len=4, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L571] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=5, head={-1:0}, len=4, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 VAL [\old(len)=5, __VERIFIER_nondet_int()=4, __VERIFIER_nondet_int() == len? 1 : 0=1, head={-1:0}, len=4, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) VAL [\old(len)=5, head={-1:0}, len=4, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L579] COND TRUE \read(head) [L580] head->prev = new_head VAL [\old(len)=5, head={-1:0}, len=4, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L582] head = new_head [L583] len-- VAL [\old(len)=5, head={-2:0}, len=3, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); VAL [\old(len)=5, head={-2:0}, len=3, malloc(sizeof(struct node))={-3:0}, new_head={-3:0}] [L571] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=5, head={-2:0}, len=3, malloc(sizeof(struct node))={-3:0}, new_head={-3:0}] [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 VAL [\old(len)=5, __VERIFIER_nondet_int()=3, __VERIFIER_nondet_int() == len? 1 : 0=1, head={-2:0}, len=3, malloc(sizeof(struct node))={-3:0}, new_head={-3:0}] [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) VAL [\old(len)=5, head={-2:0}, len=3, malloc(sizeof(struct node))={-3:0}, new_head={-3:0}] [L579] COND TRUE \read(head) [L580] head->prev = new_head VAL [\old(len)=5, head={-2:0}, len=3, malloc(sizeof(struct node))={-3:0}, new_head={-3:0}] [L582] head = new_head [L583] len-- VAL [\old(len)=5, head={-3:0}, len=2, malloc(sizeof(struct node))={-3:0}, new_head={-3:0}] [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); VAL [\old(len)=5, head={-3:0}, len=2, malloc(sizeof(struct node))={-4:0}, new_head={-4:0}] [L571] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=5, head={-3:0}, len=2, malloc(sizeof(struct node))={-4:0}, new_head={-4:0}] [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 VAL [\old(len)=5, __VERIFIER_nondet_int()=2, __VERIFIER_nondet_int() == len? 1 : 0=1, head={-3:0}, len=2, malloc(sizeof(struct node))={-4:0}, new_head={-4:0}] [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) VAL [\old(len)=5, head={-3:0}, len=2, malloc(sizeof(struct node))={-4:0}, new_head={-4:0}] [L579] COND TRUE \read(head) [L580] head->prev = new_head VAL [\old(len)=5, head={-3:0}, len=2, malloc(sizeof(struct node))={-4:0}, new_head={-4:0}] [L582] head = new_head [L583] len-- VAL [\old(len)=5, head={-4:0}, len=1, malloc(sizeof(struct node))={-4:0}, new_head={-4:0}] [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); VAL [\old(len)=5, head={-4:0}, len=1, malloc(sizeof(struct node))={-5:0}, new_head={-5:0}] [L571] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=5, head={-4:0}, len=1, malloc(sizeof(struct node))={-5:0}, new_head={-5:0}] [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 VAL [\old(len)=5, __VERIFIER_nondet_int()=1, __VERIFIER_nondet_int() == len? 1 : 0=1, head={-4:0}, len=1, malloc(sizeof(struct node))={-5:0}, new_head={-5:0}] [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) VAL [\old(len)=5, head={-4:0}, len=1, malloc(sizeof(struct node))={-5:0}, new_head={-5:0}] [L579] COND TRUE \read(head) [L580] head->prev = new_head VAL [\old(len)=5, head={-4:0}, len=1, malloc(sizeof(struct node))={-5:0}, new_head={-5:0}] [L582] head = new_head [L583] len-- VAL [\old(len)=5, head={-5:0}, len=0, malloc(sizeof(struct node))={-5:0}, new_head={-5:0}] [L569] COND FALSE !(len > 0) VAL [\old(len)=5, head={-5:0}, len=0, malloc(sizeof(struct node))={-5:0}, new_head={-5:0}] [L585] return head; VAL [\old(len)=5, \result={-5:0}, head={-5:0}, len=0, malloc(sizeof(struct node))={-5:0}, new_head={-5:0}] [L589] RET, EXPR dll_create(len) VAL [dll_create(len)={-5:0}, len=5] [L589] DLL head = dll_create(len); [L590] head->next VAL [head={-5:0}, head->next={-4:0}, len=5] [L590] COND TRUE head->next [L591] EXPR head->data_0 [L591] EXPR 0 != head->data_0 || 0 != head->data_1 [L591] EXPR head->data_1 [L591] EXPR 0 != head->data_0 || 0 != head->data_1 VAL [0 != head->data_0 || 0 != head->data_1=0, head={-5:0}, head->data_0=0, head->data_1=0, len=5] [L591] 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L591] EXPR head->data_2 [L591] 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 VAL [0 != head->data_0 || 0 != head->data_1=0, 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2=1, head={-5:0}, head->data_0=0, head->data_1=0, head->data_2=1, len=5] [L591] COND TRUE 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L605] __VERIFIER_error() VAL [head={-5:0}, len=5] - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 47 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 7.0s, OverallIterations: 8, TraceHistogramMax: 5, AutomataDifference: 2.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 242 SDtfs, 448 SDslu, 939 SDs, 0 SdLazy, 962 SolverSat, 168 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 288 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=67occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 43 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 456 NumberOfCodeBlocks, 449 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 389 ConstructedInterpolants, 0 QuantifiedInterpolants, 48760 SizeOfPredicates, 20 NumberOfNonLiveVariables, 808 ConjunctsInSsa, 50 ConjunctsInUnsatCore, 12 InterpolantComputations, 3 PerfectInterpolantSequences, 41/163 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...