/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/sll-rb-cnstr_1-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:28:23,783 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:28:23,786 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:28:23,829 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:28:23,830 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:28:23,831 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:28:23,833 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:28:23,836 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:28:23,838 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:28:23,840 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:28:23,841 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:28:23,842 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 18:28:23,843 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:28:23,844 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:28:23,846 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:28:23,847 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:28:23,849 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:28:23,850 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:28:23,852 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:28:23,854 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:28:23,864 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:28:23,866 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:28:23,868 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:28:23,871 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:28:23,877 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-23 18:28:23,878 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-23 18:28:23,879 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-23 18:28:23,887 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-23 18:28:23,888 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-23 18:28:23,889 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-23 18:28:23,889 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-23 18:28:23,890 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-23 18:28:23,891 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-23 18:28:23,892 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-23 18:28:23,894 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-23 18:28:23,895 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-23 18:28:23,896 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-23 18:28:23,896 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-23 18:28:23,896 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:28:23,904 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:28:23,905 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:28:23,906 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 18:28:23,960 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:28:23,961 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:28:23,965 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:28:23,965 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:28:23,965 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:28:23,966 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:28:23,966 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:28:23,966 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:28:23,966 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:28:23,966 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:28:23,968 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:28:23,968 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:28:23,968 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:28:23,968 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:28:23,968 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:28:23,969 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:28:23,969 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:28:23,969 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:28:23,969 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:28:23,969 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:28:23,970 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:28:23,970 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:28:23,970 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:28:23,970 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:28:23,970 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:28:23,971 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:28:23,971 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:28:23,971 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:28:23,971 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:28:23,971 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:28:24,349 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:28:24,385 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:28:24,389 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:28:24,391 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:28:24,391 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:28:24,392 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-rb-cnstr_1-2.i [2020-10-23 18:28:24,474 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a49af5353/d91475876e8c40cab35f1cf59f084efc/FLAGf3c968560 [2020-10-23 18:28:25,246 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:28:25,247 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/sll-rb-cnstr_1-2.i [2020-10-23 18:28:25,261 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a49af5353/d91475876e8c40cab35f1cf59f084efc/FLAGf3c968560 [2020-10-23 18:28:25,518 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a49af5353/d91475876e8c40cab35f1cf59f084efc [2020-10-23 18:28:25,524 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:28:25,531 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:28:25,533 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:28:25,534 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:28:25,539 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:28:25,540 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:28:25" (1/1) ... [2020-10-23 18:28:25,544 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69d16f21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:28:25, skipping insertion in model container [2020-10-23 18:28:25,545 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:28:25" (1/1) ... [2020-10-23 18:28:25,554 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:28:25,626 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:28:25,991 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:28:26,003 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:28:26,053 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:28:26,121 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:28:26,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:28:26 WrapperNode [2020-10-23 18:28:26,122 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:28:26,123 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:28:26,124 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:28:26,124 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:28:26,139 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:28:26" (1/1) ... [2020-10-23 18:28:26,140 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:28:26" (1/1) ... [2020-10-23 18:28:26,191 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:28:26" (1/1) ... [2020-10-23 18:28:26,192 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:28:26" (1/1) ... [2020-10-23 18:28:26,252 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:28:26" (1/1) ... [2020-10-23 18:28:26,260 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:28:26" (1/1) ... [2020-10-23 18:28:26,267 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:28:26" (1/1) ... [2020-10-23 18:28:26,279 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:28:26,280 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:28:26,280 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:28:26,280 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:28:26,281 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:28:26" (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 18:28:26,371 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:28:26,371 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:28:26,372 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:28:26,372 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:28:26,372 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-23 18:28:26,373 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-23 18:28:26,373 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-23 18:28:26,374 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-23 18:28:26,374 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-23 18:28:26,374 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-23 18:28:26,374 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-23 18:28:26,375 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-23 18:28:26,375 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-23 18:28:26,376 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-23 18:28:26,376 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-23 18:28:26,377 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-23 18:28:26,377 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-23 18:28:26,378 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-23 18:28:26,378 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-23 18:28:26,379 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-23 18:28:26,379 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-23 18:28:26,379 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-23 18:28:26,379 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-23 18:28:26,379 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-23 18:28:26,379 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-23 18:28:26,380 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-23 18:28:26,380 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-23 18:28:26,380 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-23 18:28:26,380 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-23 18:28:26,380 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-23 18:28:26,380 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-23 18:28:26,380 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-23 18:28:26,381 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-23 18:28:26,381 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-23 18:28:26,381 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-23 18:28:26,381 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-23 18:28:26,381 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-23 18:28:26,381 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-23 18:28:26,382 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-23 18:28:26,382 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-23 18:28:26,382 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-23 18:28:26,382 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-23 18:28:26,382 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-23 18:28:26,382 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-23 18:28:26,382 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-23 18:28:26,383 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-23 18:28:26,383 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-23 18:28:26,383 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-23 18:28:26,383 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-23 18:28:26,383 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-23 18:28:26,383 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-23 18:28:26,383 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-23 18:28:26,384 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-23 18:28:26,384 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-23 18:28:26,384 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-23 18:28:26,385 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-23 18:28:26,385 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-23 18:28:26,386 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-23 18:28:26,386 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-23 18:28:26,386 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-23 18:28:26,386 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-23 18:28:26,386 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-23 18:28:26,386 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-23 18:28:26,386 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:28:26,387 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-23 18:28:26,387 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-23 18:28:26,387 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-23 18:28:26,388 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-23 18:28:26,388 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-23 18:28:26,388 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-23 18:28:26,388 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-23 18:28:26,388 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-23 18:28:26,388 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-23 18:28:26,389 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-23 18:28:26,390 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-23 18:28:26,390 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-23 18:28:26,390 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-23 18:28:26,390 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-23 18:28:26,390 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-23 18:28:26,391 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-23 18:28:26,391 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-23 18:28:26,391 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-23 18:28:26,392 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-23 18:28:26,392 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-23 18:28:26,392 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-23 18:28:26,393 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-23 18:28:26,393 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-23 18:28:26,394 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-23 18:28:26,395 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-23 18:28:26,395 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-23 18:28:26,395 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-23 18:28:26,396 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-23 18:28:26,396 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-23 18:28:26,396 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-23 18:28:26,396 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-23 18:28:26,396 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-23 18:28:26,396 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-23 18:28:26,396 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-23 18:28:26,397 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-23 18:28:26,397 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-23 18:28:26,397 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-23 18:28:26,397 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-23 18:28:26,397 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-23 18:28:26,397 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-23 18:28:26,397 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-23 18:28:26,397 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-23 18:28:26,398 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-23 18:28:26,398 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 18:28:26,398 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:28:26,398 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-23 18:28:26,398 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-23 18:28:26,398 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:28:26,398 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:28:26,398 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:28:26,399 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-23 18:28:26,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-23 18:28:26,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:28:26,400 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-23 18:28:26,401 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:28:26,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:28:26,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:28:26,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:28:26,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:28:27,382 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:28:27,382 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-10-23 18:28:27,384 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:28:27 BoogieIcfgContainer [2020-10-23 18:28:27,385 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:28:27,386 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:28:27,386 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:28:27,403 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:28:27,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:28:25" (1/3) ... [2020-10-23 18:28:27,405 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60adb15d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:28:27, skipping insertion in model container [2020-10-23 18:28:27,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:28:26" (2/3) ... [2020-10-23 18:28:27,406 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60adb15d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:28:27, skipping insertion in model container [2020-10-23 18:28:27,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:28:27" (3/3) ... [2020-10-23 18:28:27,407 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-rb-cnstr_1-2.i [2020-10-23 18:28:27,420 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:28:27,426 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:28:27,440 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:28:27,468 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:28:27,468 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:28:27,469 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:28:27,469 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:28:27,469 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:28:27,469 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:28:27,469 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:28:27,469 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:28:27,487 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-10-23 18:28:27,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-23 18:28:27,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:28:27,493 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:28:27,494 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:28:27,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:28:27,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1919368862, now seen corresponding path program 1 times [2020-10-23 18:28:27,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:28:27,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169322187] [2020-10-23 18:28:27,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:28:27,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:27,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:28:27,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:27,820 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 18:28:27,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169322187] [2020-10-23 18:28:27,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:28:27,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-23 18:28:27,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870613472] [2020-10-23 18:28:27,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-23 18:28:27,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:28:27,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-23 18:28:27,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 18:28:27,848 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 3 states. [2020-10-23 18:28:27,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:28:27,974 INFO L93 Difference]: Finished difference Result 64 states and 102 transitions. [2020-10-23 18:28:27,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 18:28:27,976 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-23 18:28:27,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:28:27,986 INFO L225 Difference]: With dead ends: 64 [2020-10-23 18:28:27,986 INFO L226 Difference]: Without dead ends: 27 [2020-10-23 18:28:27,990 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 18:28:28,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-23 18:28:28,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-23 18:28:28,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-23 18:28:28,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2020-10-23 18:28:28,033 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 12 [2020-10-23 18:28:28,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:28:28,034 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2020-10-23 18:28:28,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-23 18:28:28,034 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2020-10-23 18:28:28,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-23 18:28:28,035 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:28:28,035 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:28:28,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:28:28,035 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:28:28,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:28:28,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1624836336, now seen corresponding path program 1 times [2020-10-23 18:28:28,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:28:28,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053178594] [2020-10-23 18:28:28,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:28:28,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:28,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:28:28,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:28,198 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 18:28:28,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053178594] [2020-10-23 18:28:28,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:28:28,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 18:28:28,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273087767] [2020-10-23 18:28:28,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 18:28:28,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:28:28,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 18:28:28,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:28:28,202 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 5 states. [2020-10-23 18:28:28,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:28:28,332 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2020-10-23 18:28:28,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 18:28:28,333 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-23 18:28:28,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:28:28,334 INFO L225 Difference]: With dead ends: 37 [2020-10-23 18:28:28,334 INFO L226 Difference]: Without dead ends: 33 [2020-10-23 18:28:28,335 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 18:28:28,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-23 18:28:28,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2020-10-23 18:28:28,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-23 18:28:28,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-10-23 18:28:28,344 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 13 [2020-10-23 18:28:28,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:28:28,345 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-10-23 18:28:28,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 18:28:28,345 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-10-23 18:28:28,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-23 18:28:28,346 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:28:28,346 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:28:28,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 18:28:28,347 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:28:28,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:28:28,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1800112252, now seen corresponding path program 1 times [2020-10-23 18:28:28,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:28:28,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654661233] [2020-10-23 18:28:28,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:28:28,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:28,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:28:28,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:28,556 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 18:28:28,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654661233] [2020-10-23 18:28:28,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:28:28,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:28:28,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480995814] [2020-10-23 18:28:28,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:28:28,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:28:28,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:28:28,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:28:28,560 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 6 states. [2020-10-23 18:28:28,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:28:28,741 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2020-10-23 18:28:28,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 18:28:28,741 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-23 18:28:28,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:28:28,743 INFO L225 Difference]: With dead ends: 52 [2020-10-23 18:28:28,743 INFO L226 Difference]: Without dead ends: 48 [2020-10-23 18:28:28,743 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 18:28:28,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-23 18:28:28,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 33. [2020-10-23 18:28:28,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-23 18:28:28,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-10-23 18:28:28,752 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 16 [2020-10-23 18:28:28,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:28:28,753 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-10-23 18:28:28,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:28:28,753 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-10-23 18:28:28,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-23 18:28:28,754 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:28:28,754 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 18:28:28,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 18:28:28,755 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:28:28,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:28:28,756 INFO L82 PathProgramCache]: Analyzing trace with hash 321788843, now seen corresponding path program 1 times [2020-10-23 18:28:28,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:28:28,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716188410] [2020-10-23 18:28:28,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:28:28,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:29,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:28:29,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:29,018 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 18:28:29,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716188410] [2020-10-23 18:28:29,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142796954] [2020-10-23 18:28:29,019 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 18:28:29,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:29,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-23 18:28:29,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:28:29,272 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 18:28:29,272 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:29,283 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:29,289 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 18:28:29,290 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:29,303 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:29,303 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 18:28:29,304 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:21 [2020-10-23 18:28:29,379 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:29,380 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 18:28:29,383 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:28:29,389 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:29,405 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:29,413 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 18:28:29,428 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:29,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:28:29,436 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 41 treesize of output 20 [2020-10-23 18:28:29,438 INFO L545 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:29,448 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:29,451 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:28:29,451 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:14 [2020-10-23 18:28:29,484 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 18:28:29,485 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:29,494 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:29,497 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 18:28:29,498 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:23 [2020-10-23 18:28:29,608 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 18:28:29,610 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:29,615 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:29,616 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 18:28:29,617 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:32, output treesize:3 [2020-10-23 18:28:29,621 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 18:28:29,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:28:29,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2020-10-23 18:28:29,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054375135] [2020-10-23 18:28:29,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-23 18:28:29,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:28:29,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-23 18:28:29,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-10-23 18:28:29,624 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 12 states. [2020-10-23 18:28:30,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:28:30,262 INFO L93 Difference]: Finished difference Result 82 states and 99 transitions. [2020-10-23 18:28:30,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-23 18:28:30,264 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2020-10-23 18:28:30,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:28:30,265 INFO L225 Difference]: With dead ends: 82 [2020-10-23 18:28:30,265 INFO L226 Difference]: Without dead ends: 78 [2020-10-23 18:28:30,268 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 18:28:30,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-23 18:28:30,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 36. [2020-10-23 18:28:30,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-23 18:28:30,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2020-10-23 18:28:30,287 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 19 [2020-10-23 18:28:30,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:28:30,288 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2020-10-23 18:28:30,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-23 18:28:30,288 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2020-10-23 18:28:30,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-23 18:28:30,289 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:28:30,289 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 18:28:30,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:28:30,491 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:28:30,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:28:30,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1022853421, now seen corresponding path program 1 times [2020-10-23 18:28:30,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:28:30,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683405673] [2020-10-23 18:28:30,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:28:30,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:30,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:28:30,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:30,780 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 18:28:30,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683405673] [2020-10-23 18:28:30,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862614505] [2020-10-23 18:28:30,781 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 18:28:30,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:28:30,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 34 conjunts are in the unsatisfiable core [2020-10-23 18:28:30,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:28:30,938 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 18:28:30,938 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:30,951 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:30,956 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 18:28:30,957 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:30,969 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:30,970 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 18:28:30,970 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:29, output treesize:24 [2020-10-23 18:28:31,032 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:31,033 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 18:28:31,034 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:31,090 INFO L625 ElimStorePlain]: treesize reduction 14, result has 81.1 percent of original size [2020-10-23 18:28:31,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:28:31,101 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 18:28:31,102 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:31,124 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:31,130 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 25 treesize of output 13 [2020-10-23 18:28:31,131 INFO L545 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:31,149 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:31,152 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-23 18:28:31,152 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:62, output treesize:27 [2020-10-23 18:28:31,271 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:31,271 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 18:28:31,273 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:31,317 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:31,320 INFO L441 ElimStorePlain]: Different costs {2=[|v_#memory_int_30|, |v_#memory_int_31|], 4=[|v_#memory_int_33|]} [2020-10-23 18:28:31,324 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 18:28:31,351 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:31,355 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 18:28:31,384 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:31,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-23 18:28:31,414 INFO L350 Elim1Store]: treesize reduction 42, result has 28.8 percent of original size [2020-10-23 18:28:31,414 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 2 case distinctions, treesize of input 52 treesize of output 45 [2020-10-23 18:28:31,415 INFO L545 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:31,438 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:31,448 INFO L545 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, 3 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-10-23 18:28:31,449 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:80, output treesize:43 [2020-10-23 18:28:31,675 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 18:28:31,683 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-23 18:28:31,691 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 18:28:31,693 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 18:28:31,693 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:45, output treesize:3 [2020-10-23 18:28:31,697 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 18:28:31,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:28:31,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2020-10-23 18:28:31,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121115269] [2020-10-23 18:28:31,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-23 18:28:31,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:28:31,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-23 18:28:31,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-23 18:28:31,701 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand 12 states. [2020-10-23 18:28:34,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:28:34,995 INFO L93 Difference]: Finished difference Result 69 states and 83 transitions. [2020-10-23 18:28:34,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-23 18:28:34,996 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2020-10-23 18:28:34,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:28:34,997 INFO L225 Difference]: With dead ends: 69 [2020-10-23 18:28:34,997 INFO L226 Difference]: Without dead ends: 65 [2020-10-23 18:28:35,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2020-10-23 18:28:35,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-23 18:28:35,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 25. [2020-10-23 18:28:35,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-23 18:28:35,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-10-23 18:28:35,015 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 19 [2020-10-23 18:28:35,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:28:35,016 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-10-23 18:28:35,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-23 18:28:35,016 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-10-23 18:28:35,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-23 18:28:35,017 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:28:35,018 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 18:28:35,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:28:35,219 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:28:35,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:28:35,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1329726237, now seen corresponding path program 1 times [2020-10-23 18:28:35,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:28:35,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145919762] [2020-10-23 18:28:35,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:28:35,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:28:35,252 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:28:35,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:28:35,264 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:28:35,288 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-23 18:28:35,288 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 18:28:35,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-23 18:28:35,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:28:35 BoogieIcfgContainer [2020-10-23 18:28:35,320 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:28:35,321 INFO L168 Benchmark]: Toolchain (without parser) took 9795.35 ms. Allocated memory was 162.5 MB in the beginning and 195.0 MB in the end (delta: 32.5 MB). Free memory was 137.4 MB in the beginning and 88.5 MB in the end (delta: 48.9 MB). Peak memory consumption was 82.0 MB. Max. memory is 8.0 GB. [2020-10-23 18:28:35,322 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 125.8 MB. Free memory was 100.9 MB in the beginning and 100.8 MB in the end (delta: 69.8 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:28:35,323 INFO L168 Benchmark]: CACSL2BoogieTranslator took 589.40 ms. Allocated memory is still 162.5 MB. Free memory was 136.7 MB in the beginning and 114.8 MB in the end (delta: 21.9 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2020-10-23 18:28:35,324 INFO L168 Benchmark]: Boogie Preprocessor took 155.36 ms. Allocated memory is still 162.5 MB. Free memory was 114.8 MB in the beginning and 144.7 MB in the end (delta: -29.9 MB). Peak memory consumption was 2.7 MB. Max. memory is 8.0 GB. [2020-10-23 18:28:35,324 INFO L168 Benchmark]: RCFGBuilder took 1105.01 ms. Allocated memory is still 162.5 MB. Free memory was 144.3 MB in the beginning and 102.0 MB in the end (delta: 42.3 MB). Peak memory consumption was 41.9 MB. Max. memory is 8.0 GB. [2020-10-23 18:28:35,325 INFO L168 Benchmark]: TraceAbstraction took 7933.46 ms. Allocated memory was 162.5 MB in the beginning and 195.0 MB in the end (delta: 32.5 MB). Free memory was 101.8 MB in the beginning and 88.5 MB in the end (delta: 13.2 MB). Peak memory consumption was 46.8 MB. Max. memory is 8.0 GB. [2020-10-23 18:28:35,328 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 125.8 MB. Free memory was 100.9 MB in the beginning and 100.8 MB in the end (delta: 69.8 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 589.40 ms. Allocated memory is still 162.5 MB. Free memory was 136.7 MB in the beginning and 114.8 MB in the end (delta: 21.9 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 155.36 ms. Allocated memory is still 162.5 MB. Free memory was 114.8 MB in the beginning and 144.7 MB in the end (delta: -29.9 MB). Peak memory consumption was 2.7 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1105.01 ms. Allocated memory is still 162.5 MB. Free memory was 144.3 MB in the beginning and 102.0 MB in the end (delta: 42.3 MB). Peak memory consumption was 41.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 7933.46 ms. Allocated memory was 162.5 MB in the beginning and 195.0 MB in the end (delta: 32.5 MB). Free memory was 101.8 MB in the beginning and 88.5 MB in the end (delta: 13.2 MB). Peak memory consumption was 46.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 993]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L1006] SLL* list = malloc(sizeof(SLL)); [L1007] list->next = ((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()) [L1034] end = ((void*)0) [L1035] end = list VAL [end={-1:0}, list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1038] COND FALSE !(!(((void*)0) != end)) VAL [end={-1:0}, list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1039] EXPR end->colour VAL [end={-1:0}, end->colour=1, list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1039] COND FALSE !(!(BLACK == end->colour)) [L1041] COND TRUE ((void*)0) != end [L1043] EXPR end->colour VAL [end={-1:0}, end->colour=1, list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1043] COND FALSE !(RED == end->colour) [L1049] EXPR end->next VAL [end={-1:0}, end->next={0:0}, list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1049] COND TRUE !(end->next) [L1049] CALL reach_error() [L993] COND FALSE !(0) [L993] __assert_fail ("0", "sll-rb-cnstr_1-2.c", 13, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 7.8s, 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, 1.1s 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, 2.1s InterpolantComputationTime, 138 NumberOfCodeBlocks, 138 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 110 ConstructedInterpolants, 12 QuantifiedInterpolants, 18694 SizeOfPredicates, 22 NumberOfNonLiveVariables, 277 ConjunctsInSsa, 54 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...