/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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/forester-heap/dll-rb-cnstr_1-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:28:05,951 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:28:05,955 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:28:05,999 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:28:06,000 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:28:06,002 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:28:06,003 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:28:06,006 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:28:06,009 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:28:06,010 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:28:06,011 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:28:06,013 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 18:28:06,014 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:28:06,015 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:28:06,017 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:28:06,018 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:28:06,020 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:28:06,021 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:28:06,036 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:28:06,038 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:28:06,040 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:28:06,042 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:28:06,043 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:28:06,045 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:28:06,048 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-23 18:28:06,049 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-23 18:28:06,049 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-23 18:28:06,050 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-23 18:28:06,051 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-23 18:28:06,052 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-23 18:28:06,053 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-23 18:28:06,054 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-23 18:28:06,055 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-23 18:28:06,056 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-23 18:28:06,057 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-23 18:28:06,058 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-23 18:28:06,059 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-23 18:28:06,059 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-23 18:28:06,059 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:28:06,061 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:28:06,062 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:28:06,065 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 [2020-10-23 18:28:06,124 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:28:06,124 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:28:06,127 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:28:06,127 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:28:06,128 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:28:06,128 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:28:06,129 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:28:06,129 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:28:06,131 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:28:06,131 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:28:06,133 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:28:06,133 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:28:06,133 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:28:06,134 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:28:06,134 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:28:06,134 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:28:06,134 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:28:06,135 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:28:06,135 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:28:06,135 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:28:06,136 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:28:06,136 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:28:06,136 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:28:06,136 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:28:06,137 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:28:06,137 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:28:06,137 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:28:06,138 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:28:06,138 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:28:06,138 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:28:06,594 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:28:06,641 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:28:06,644 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:28:06,645 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:28:06,646 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:28:06,647 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-rb-cnstr_1-2.i [2020-10-23 18:28:06,730 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb154e017/37ba3ea591964e6495a1b53c21da50c7/FLAG8a37668fa [2020-10-23 18:28:07,392 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:28:07,393 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/dll-rb-cnstr_1-2.i [2020-10-23 18:28:07,418 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb154e017/37ba3ea591964e6495a1b53c21da50c7/FLAG8a37668fa [2020-10-23 18:28:07,657 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb154e017/37ba3ea591964e6495a1b53c21da50c7 [2020-10-23 18:28:07,661 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:28:07,667 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:28:07,669 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:28:07,669 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:28:07,673 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:28:07,674 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:28:07" (1/1) ... [2020-10-23 18:28:07,678 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56c598d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:28:07, skipping insertion in model container [2020-10-23 18:28:07,678 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:28:07" (1/1) ... [2020-10-23 18:28:07,687 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:28:07,727 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:28:08,095 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:28:08,112 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:28:08,187 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:28:08,245 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:28:08,246 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:28:08 WrapperNode [2020-10-23 18:28:08,246 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:28:08,247 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:28:08,247 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:28:08,248 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:28:08,261 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:28:08" (1/1) ... [2020-10-23 18:28:08,261 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:28:08" (1/1) ... [2020-10-23 18:28:08,277 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:28:08" (1/1) ... [2020-10-23 18:28:08,278 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:28:08" (1/1) ... [2020-10-23 18:28:08,301 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:28:08" (1/1) ... [2020-10-23 18:28:08,308 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:28:08" (1/1) ... [2020-10-23 18:28:08,314 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:28:08" (1/1) ... [2020-10-23 18:28:08,335 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:28:08,336 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:28:08,336 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:28:08,336 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:28:08,337 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:28:08" (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 [2020-10-23 18:28:08,427 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:28:08,427 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:28:08,427 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:28:08,428 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:28:08,428 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-23 18:28:08,429 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-23 18:28:08,429 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-23 18:28:08,430 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-23 18:28:08,430 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-23 18:28:08,430 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-23 18:28:08,431 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-23 18:28:08,431 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-23 18:28:08,431 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-23 18:28:08,432 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-23 18:28:08,432 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-23 18:28:08,433 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-23 18:28:08,433 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-23 18:28:08,433 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-23 18:28:08,433 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-23 18:28:08,434 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-23 18:28:08,434 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-23 18:28:08,434 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-23 18:28:08,434 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-23 18:28:08,434 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-23 18:28:08,435 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-23 18:28:08,435 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-23 18:28:08,435 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-23 18:28:08,435 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-23 18:28:08,435 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-23 18:28:08,435 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-23 18:28:08,435 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-23 18:28:08,436 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-23 18:28:08,436 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-23 18:28:08,436 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-23 18:28:08,436 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-23 18:28:08,436 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-23 18:28:08,436 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-23 18:28:08,436 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-23 18:28:08,437 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-23 18:28:08,437 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-23 18:28:08,437 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-23 18:28:08,437 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-23 18:28:08,437 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-23 18:28:08,437 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-23 18:28:08,437 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-23 18:28:08,438 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-23 18:28:08,438 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-23 18:28:08,438 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-23 18:28:08,438 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-23 18:28:08,438 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-23 18:28:08,438 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-23 18:28:08,438 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-23 18:28:08,439 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-23 18:28:08,439 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-23 18:28:08,439 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-23 18:28:08,440 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-23 18:28:08,440 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-23 18:28:08,440 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-23 18:28:08,440 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-23 18:28:08,440 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-23 18:28:08,441 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-23 18:28:08,441 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-23 18:28:08,441 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-23 18:28:08,441 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:28:08,441 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-23 18:28:08,441 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-23 18:28:08,442 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-23 18:28:08,442 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-23 18:28:08,442 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-23 18:28:08,442 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-23 18:28:08,442 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-23 18:28:08,442 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-23 18:28:08,443 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-23 18:28:08,443 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-23 18:28:08,443 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-23 18:28:08,444 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-23 18:28:08,444 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-23 18:28:08,444 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-23 18:28:08,444 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-23 18:28:08,445 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-23 18:28:08,445 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-23 18:28:08,445 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-23 18:28:08,445 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-23 18:28:08,445 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-23 18:28:08,446 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-23 18:28:08,446 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-23 18:28:08,446 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-23 18:28:08,447 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-23 18:28:08,448 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-23 18:28:08,448 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-23 18:28:08,448 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-23 18:28:08,448 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-23 18:28:08,448 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-23 18:28:08,448 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-23 18:28:08,448 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-23 18:28:08,449 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-23 18:28:08,449 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-23 18:28:08,449 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-23 18:28:08,449 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-23 18:28:08,449 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-23 18:28:08,450 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-23 18:28:08,450 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-23 18:28:08,450 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-23 18:28:08,450 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-23 18:28:08,450 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-23 18:28:08,450 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-23 18:28:08,450 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-23 18:28:08,450 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 18:28:08,451 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:28:08,451 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-23 18:28:08,451 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-23 18:28:08,451 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:28:08,451 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:28:08,451 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:28:08,451 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-23 18:28:08,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-23 18:28:08,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:28:08,453 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-23 18:28:08,453 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:28:08,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:28:08,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:28:08,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:28:08,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:28:09,148 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:28:09,148 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-10-23 18:28:09,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:28:09 BoogieIcfgContainer [2020-10-23 18:28:09,150 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:28:09,152 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:28:09,152 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:28:09,155 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:28:09,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:28:07" (1/3) ... [2020-10-23 18:28:09,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19db1879 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:28:09, skipping insertion in model container [2020-10-23 18:28:09,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:28:08" (2/3) ... [2020-10-23 18:28:09,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19db1879 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:28:09, skipping insertion in model container [2020-10-23 18:28:09,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:28:09" (3/3) ... [2020-10-23 18:28:09,159 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-rb-cnstr_1-2.i [2020-10-23 18:28:09,172 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:28:09,177 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:28:09,191 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:28:09,219 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:28:09,220 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:28:09,220 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:28:09,220 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:28:09,220 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:28:09,220 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:28:09,221 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:28:09,221 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:28:09,240 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-10-23 18:28:09,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-23 18:28:09,246 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:28:09,247 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:28:09,247 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:28:09,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:28:09,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1919368862, now seen corresponding path program 1 times [2020-10-23 18:28:09,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:28:09,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675327108] [2020-10-23 18:28:09,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:28:09,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:09,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:28:09,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:09,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:28:09,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675327108] [2020-10-23 18:28:09,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:28:09,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-23 18:28:09,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787248743] [2020-10-23 18:28:09,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-23 18:28:09,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:28:09,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-23 18:28:09,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 18:28:09,532 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 3 states. [2020-10-23 18:28:09,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:28:09,699 INFO L93 Difference]: Finished difference Result 64 states and 102 transitions. [2020-10-23 18:28:09,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 18:28:09,701 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-23 18:28:09,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:28:09,711 INFO L225 Difference]: With dead ends: 64 [2020-10-23 18:28:09,711 INFO L226 Difference]: Without dead ends: 27 [2020-10-23 18:28:09,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 18:28:09,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-23 18:28:09,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-23 18:28:09,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-23 18:28:09,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2020-10-23 18:28:09,760 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 12 [2020-10-23 18:28:09,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:28:09,760 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2020-10-23 18:28:09,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-23 18:28:09,760 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2020-10-23 18:28:09,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-23 18:28:09,761 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:28:09,762 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:28:09,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:28:09,762 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:28:09,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:28:09,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1624836336, now seen corresponding path program 1 times [2020-10-23 18:28:09,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:28:09,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081879221] [2020-10-23 18:28:09,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:28:09,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:09,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:28:09,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:09,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:28:09,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081879221] [2020-10-23 18:28:09,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:28:09,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 18:28:09,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329025717] [2020-10-23 18:28:09,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 18:28:09,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:28:09,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 18:28:09,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:28:09,956 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 5 states. [2020-10-23 18:28:10,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:28:10,115 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2020-10-23 18:28:10,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 18:28:10,116 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-23 18:28:10,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:28:10,117 INFO L225 Difference]: With dead ends: 37 [2020-10-23 18:28:10,117 INFO L226 Difference]: Without dead ends: 33 [2020-10-23 18:28:10,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:28:10,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-23 18:28:10,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2020-10-23 18:28:10,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-23 18:28:10,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-10-23 18:28:10,126 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 13 [2020-10-23 18:28:10,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:28:10,126 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-10-23 18:28:10,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 18:28:10,126 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-10-23 18:28:10,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-23 18:28:10,127 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:28:10,127 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:28:10,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 18:28:10,128 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:28:10,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:28:10,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1800112252, now seen corresponding path program 1 times [2020-10-23 18:28:10,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:28:10,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964067306] [2020-10-23 18:28:10,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:28:10,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:10,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:28:10,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:10,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:28:10,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964067306] [2020-10-23 18:28:10,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:28:10,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:28:10,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013081528] [2020-10-23 18:28:10,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:28:10,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:28:10,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:28:10,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:28:10,265 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 6 states. [2020-10-23 18:28:10,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:28:10,514 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2020-10-23 18:28:10,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 18:28:10,515 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-23 18:28:10,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:28:10,516 INFO L225 Difference]: With dead ends: 52 [2020-10-23 18:28:10,516 INFO L226 Difference]: Without dead ends: 48 [2020-10-23 18:28:10,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-23 18:28:10,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-23 18:28:10,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 33. [2020-10-23 18:28:10,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-23 18:28:10,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-10-23 18:28:10,536 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 16 [2020-10-23 18:28:10,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:28:10,537 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-10-23 18:28:10,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:28:10,538 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-10-23 18:28:10,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-23 18:28:10,542 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:28:10,543 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:28:10,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 18:28:10,545 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:28:10,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:28:10,546 INFO L82 PathProgramCache]: Analyzing trace with hash 321788843, now seen corresponding path program 1 times [2020-10-23 18:28:10,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:28:10,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903216857] [2020-10-23 18:28:10,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:28:10,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:10,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:28:10,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:10,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:28:10,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903216857] [2020-10-23 18:28:10,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863058384] [2020-10-23 18:28:10,876 INFO L95 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 [2020-10-23 18:28:11,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:11,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-23 18:28:11,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:28:11,128 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-10-23 18:28:11,128 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:11,145 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:11,150 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-10-23 18:28:11,151 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:11,161 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:11,162 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:28:11,162 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:21 [2020-10-23 18:28:11,437 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:11,438 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2020-10-23 18:28:11,440 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:28:11,445 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:11,488 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:11,501 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 18:28:11,530 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:11,534 INFO L545 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 18:28:11,561 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:11,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:28:11,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:28:11,573 INFO L173 IndexEqualityManager]: detected equality via solver [2020-10-23 18:28:11,590 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:11,591 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 55 [2020-10-23 18:28:11,592 INFO L545 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:11,650 INFO L625 ElimStorePlain]: treesize reduction 20, result has 78.3 percent of original size [2020-10-23 18:28:11,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:28:11,657 INFO L545 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:11,676 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:11,680 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, 4 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:28:11,681 INFO L244 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:105, output treesize:14 [2020-10-23 18:28:11,716 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-10-23 18:28:11,717 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:11,726 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:11,728 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-23 18:28:11,729 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:23 [2020-10-23 18:28:11,838 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 10 [2020-10-23 18:28:11,839 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:11,846 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:11,848 INFO L545 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:28:11,848 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:32, output treesize:3 [2020-10-23 18:28:11,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:28:11,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:28:11,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2020-10-23 18:28:11,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030106669] [2020-10-23 18:28:11,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-23 18:28:11,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:28:11,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-23 18:28:11,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-10-23 18:28:11,856 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 12 states. [2020-10-23 18:28:12,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:28:12,706 INFO L93 Difference]: Finished difference Result 82 states and 99 transitions. [2020-10-23 18:28:12,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-23 18:28:12,706 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2020-10-23 18:28:12,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:28:12,708 INFO L225 Difference]: With dead ends: 82 [2020-10-23 18:28:12,708 INFO L226 Difference]: Without dead ends: 78 [2020-10-23 18:28:12,709 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-23 18:28:12,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-23 18:28:12,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 36. [2020-10-23 18:28:12,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-23 18:28:12,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2020-10-23 18:28:12,718 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 19 [2020-10-23 18:28:12,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:28:12,718 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2020-10-23 18:28:12,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-23 18:28:12,718 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2020-10-23 18:28:12,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-23 18:28:12,719 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:28:12,720 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:28:12,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:28:12,934 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:28:12,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:28:12,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1022853421, now seen corresponding path program 1 times [2020-10-23 18:28:12,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:28:12,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485460491] [2020-10-23 18:28:12,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:28:13,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:13,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:28:13,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:13,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:28:13,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485460491] [2020-10-23 18:28:13,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943997276] [2020-10-23 18:28:13,188 INFO L95 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 [2020-10-23 18:28:13,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:13,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 36 conjunts are in the unsatisfiable core [2020-10-23 18:28:13,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:28:13,352 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-10-23 18:28:13,352 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:13,365 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:13,383 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-10-23 18:28:13,383 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:13,402 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:13,403 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:28:13,403 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:29, output treesize:24 [2020-10-23 18:28:13,499 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:13,499 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 39 [2020-10-23 18:28:13,500 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:13,632 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-10-23 18:28:13,633 INFO L625 ElimStorePlain]: treesize reduction 14, result has 88.9 percent of original size [2020-10-23 18:28:13,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:28:13,649 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2020-10-23 18:28:13,650 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:13,685 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:13,689 INFO L545 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 18:28:13,718 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:13,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:28:13,735 INFO L173 IndexEqualityManager]: detected equality via solver [2020-10-23 18:28:13,753 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:13,753 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2020-10-23 18:28:13,754 INFO L545 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:13,824 INFO L625 ElimStorePlain]: treesize reduction 20, result has 79.6 percent of original size [2020-10-23 18:28:13,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:28:13,831 INFO L545 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:13,855 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:13,859 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, 4 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:28:13,859 INFO L244 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:114, output treesize:27 [2020-10-23 18:28:14,007 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:14,007 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2020-10-23 18:28:14,008 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:14,094 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:14,097 INFO L441 ElimStorePlain]: Different costs {2=[|v_#memory_int_40|, |v_#memory_int_38|, |v_#memory_int_39|, |v_#memory_$Pointer$.base_26|], 4=[|v_#memory_int_42|]} [2020-10-23 18:28:14,104 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 18:28:14,168 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:14,183 INFO L545 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 18:28:14,229 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:14,232 INFO L545 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 18:28:14,275 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:14,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:28:14,283 INFO L545 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:14,309 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:14,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:28:14,393 INFO L350 Elim1Store]: treesize reduction 65, result has 46.7 percent of original size [2020-10-23 18:28:14,394 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 85 [2020-10-23 18:28:14,395 INFO L545 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:14,467 INFO L625 ElimStorePlain]: treesize reduction 18, result has 81.4 percent of original size [2020-10-23 18:28:14,486 INFO L545 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, 5 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-10-23 18:28:14,486 INFO L244 ElimStorePlain]: Needed 7 recursive calls to eliminate 11 variables, input treesize:249, output treesize:43 [2020-10-23 18:28:14,701 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2020-10-23 18:28:14,702 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:14,710 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:14,712 INFO L545 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:28:14,712 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:45, output treesize:3 [2020-10-23 18:28:14,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:28:14,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:28:14,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2020-10-23 18:28:14,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973850103] [2020-10-23 18:28:14,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-23 18:28:14,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:28:14,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-23 18:28:14,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-23 18:28:14,719 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand 12 states. [2020-10-23 18:28:17,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:28:17,668 INFO L93 Difference]: Finished difference Result 69 states and 83 transitions. [2020-10-23 18:28:17,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-23 18:28:17,669 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2020-10-23 18:28:17,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:28:17,670 INFO L225 Difference]: With dead ends: 69 [2020-10-23 18:28:17,670 INFO L226 Difference]: Without dead ends: 65 [2020-10-23 18:28:17,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2020-10-23 18:28:17,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-23 18:28:17,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 25. [2020-10-23 18:28:17,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-23 18:28:17,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-10-23 18:28:17,678 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 19 [2020-10-23 18:28:17,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:28:17,678 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-10-23 18:28:17,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-23 18:28:17,679 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-10-23 18:28:17,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-23 18:28:17,679 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:28:17,679 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] [2020-10-23 18:28:17,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:28:17,895 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:28:17,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:28:17,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1329726237, now seen corresponding path program 1 times [2020-10-23 18:28:17,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:28:17,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808119974] [2020-10-23 18:28:17,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:28:17,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:28:17,910 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:28:17,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:28:17,921 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:28:17,946 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-23 18:28:17,946 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 18:28:17,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-23 18:28:17,981 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:28:17 BoogieIcfgContainer [2020-10-23 18:28:17,981 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:28:17,983 INFO L168 Benchmark]: Toolchain (without parser) took 10319.96 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 125.1 MB in the beginning and 76.9 MB in the end (delta: 48.2 MB). Peak memory consumption was 80.0 MB. Max. memory is 8.0 GB. [2020-10-23 18:28:17,983 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory was 123.7 MB in the beginning and 123.6 MB in the end (delta: 77.7 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:28:17,984 INFO L168 Benchmark]: CACSL2BoogieTranslator took 577.25 ms. Allocated memory is still 151.0 MB. Free memory was 124.5 MB in the beginning and 102.3 MB in the end (delta: 22.2 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2020-10-23 18:28:17,985 INFO L168 Benchmark]: Boogie Preprocessor took 87.82 ms. Allocated memory is still 151.0 MB. Free memory was 102.3 MB in the beginning and 133.3 MB in the end (delta: -31.0 MB). Peak memory consumption was 6.5 MB. Max. memory is 8.0 GB. [2020-10-23 18:28:17,985 INFO L168 Benchmark]: RCFGBuilder took 814.25 ms. Allocated memory is still 151.0 MB. Free memory was 133.3 MB in the beginning and 89.5 MB in the end (delta: 43.8 MB). Peak memory consumption was 44.0 MB. Max. memory is 8.0 GB. [2020-10-23 18:28:17,986 INFO L168 Benchmark]: TraceAbstraction took 8829.30 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 89.0 MB in the beginning and 76.9 MB in the end (delta: 12.1 MB). Peak memory consumption was 43.1 MB. Max. memory is 8.0 GB. [2020-10-23 18:28:17,991 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory was 123.7 MB in the beginning and 123.6 MB in the end (delta: 77.7 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 577.25 ms. Allocated memory is still 151.0 MB. Free memory was 124.5 MB in the beginning and 102.3 MB in the end (delta: 22.2 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 87.82 ms. Allocated memory is still 151.0 MB. Free memory was 102.3 MB in the beginning and 133.3 MB in the end (delta: -31.0 MB). Peak memory consumption was 6.5 MB. Max. memory is 8.0 GB. * RCFGBuilder took 814.25 ms. Allocated memory is still 151.0 MB. Free memory was 133.3 MB in the beginning and 89.5 MB in the end (delta: 43.8 MB). Peak memory consumption was 44.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 8829.30 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 89.0 MB in the beginning and 76.9 MB in the end (delta: 12.1 MB). Peak memory consumption was 43.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 991]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L1005] SLL* list = malloc(sizeof(SLL)); [L1006] list->next = ((void*)0) [L1007] list->prev = ((void*)0) [L1008] list->colour = BLACK [L1010] SLL* end = list; VAL [end={-1:0}, list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1013] COND FALSE !(__VERIFIER_nondet_int()) [L1036] end = ((void*)0) [L1037] end = list VAL [end={-1:0}, list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1040] COND FALSE !(!(((void*)0) != end)) VAL [end={-1:0}, list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1041] EXPR end->colour VAL [end={-1:0}, end->colour=1, list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1041] COND FALSE !(!(BLACK == end->colour)) [L1043] COND TRUE ((void*)0) != end [L1045] EXPR end->colour VAL [end={-1:0}, end->colour=1, list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1045] COND FALSE !(RED == end->colour) [L1051] EXPR end->next VAL [end={-1:0}, end->next={0:0}, list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1051] COND TRUE !(end->next) [L1051] CALL reach_error() [L991] COND FALSE !(0) [L991] __assert_fail ("0", "dll-rb-cnstr_1-2.c", 11, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 8.7s, OverallIterations: 6, TraceHistogramMax: 2, AutomataDifference: 4.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 128 SDtfs, 240 SDslu, 331 SDs, 0 SdLazy, 577 SolverSat, 87 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 3.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 85 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred in iteration=0, 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, 5 MinimizatonAttempts, 104 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.9s InterpolantComputationTime, 138 NumberOfCodeBlocks, 138 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 110 ConstructedInterpolants, 12 QuantifiedInterpolants, 18496 SizeOfPredicates, 25 NumberOfNonLiveVariables, 282 ConjunctsInSsa, 57 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 0/8 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...