/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 --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/forester-heap/dll-01-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 05:19:43,098 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 05:19:43,101 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 05:19:43,158 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-07 05:19:43,159 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-07 05:19:43,164 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-07 05:19:43,169 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-07 05:19:43,176 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-07 05:19:43,180 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-07 05:19:43,186 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-07 05:19:43,187 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-07 05:19:43,189 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-07 05:19:43,189 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 05:19:43,193 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 05:19:43,195 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 05:19:43,197 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 05:19:43,198 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 05:19:43,203 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 05:19:43,224 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 05:19:43,230 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 05:19:43,232 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 05:19:43,233 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 05:19:43,235 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 05:19:43,238 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 05:19:43,248 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-07 05:19:43,248 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-07 05:19:43,248 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-07 05:19:43,252 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-07 05:19:43,253 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-07 05:19:43,255 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-07 05:19:43,256 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-07 05:19:43,257 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-07 05:19:43,258 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-07 05:19:43,260 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-07 05:19:43,262 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-07 05:19:43,262 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-07 05:19:43,263 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-07 05:19:43,263 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-07 05:19:43,263 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 05:19:43,264 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 05:19:43,265 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 05:19:43,266 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 05:19:43,290 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 05:19:43,290 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 05:19:43,294 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 05:19:43,294 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 05:19:43,294 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 05:19:43,294 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 05:19:43,295 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 05:19:43,295 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 05:19:43,295 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 05:19:43,295 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 05:19:43,297 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 05:19:43,297 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 05:19:43,297 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 05:19:43,298 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 05:19:43,298 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 05:19:43,298 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 05:19:43,298 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 05:19:43,299 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 05:19:43,299 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 05:19:43,299 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 05:19:43,299 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 05:19:43,299 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 05:19:43,300 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-11-07 05:19:43,739 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 05:19:43,799 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 05:19:43,803 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 05:19:43,804 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 05:19:43,805 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 05:19:43,806 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-01-1.i [2020-11-07 05:19:43,909 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2338326e1/9a06e3a87395439bbc87ddaaaca96836/FLAGc56f3d72e [2020-11-07 05:19:44,732 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 05:19:44,733 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/dll-01-1.i [2020-11-07 05:19:44,754 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2338326e1/9a06e3a87395439bbc87ddaaaca96836/FLAGc56f3d72e [2020-11-07 05:19:45,028 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2338326e1/9a06e3a87395439bbc87ddaaaca96836 [2020-11-07 05:19:45,031 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 05:19:45,039 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 05:19:45,041 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 05:19:45,042 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 05:19:45,046 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 05:19:45,048 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 05:19:45" (1/1) ... [2020-11-07 05:19:45,052 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e1a987d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:19:45, skipping insertion in model container [2020-11-07 05:19:45,053 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 05:19:45" (1/1) ... [2020-11-07 05:19:45,062 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 05:19:45,109 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 05:19:45,489 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 05:19:45,502 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 05:19:45,567 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 05:19:45,632 INFO L208 MainTranslator]: Completed translation [2020-11-07 05:19:45,633 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:19:45 WrapperNode [2020-11-07 05:19:45,633 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 05:19:45,635 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 05:19:45,635 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 05:19:45,635 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 05:19:45,650 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:19:45" (1/1) ... [2020-11-07 05:19:45,650 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:19:45" (1/1) ... [2020-11-07 05:19:45,670 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:19:45" (1/1) ... [2020-11-07 05:19:45,670 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:19:45" (1/1) ... [2020-11-07 05:19:45,723 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:19:45" (1/1) ... [2020-11-07 05:19:45,747 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:19:45" (1/1) ... [2020-11-07 05:19:45,753 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:19:45" (1/1) ... [2020-11-07 05:19:45,762 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 05:19:45,773 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 05:19:45,774 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 05:19:45,774 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 05:19:45,776 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:19:45" (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 [2020-11-07 05:19:45,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 05:19:45,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 05:19:45,867 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 05:19:45,867 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 05:19:45,867 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-11-07 05:19:45,867 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-11-07 05:19:45,867 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-11-07 05:19:45,868 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-11-07 05:19:45,868 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-11-07 05:19:45,868 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-11-07 05:19:45,868 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-11-07 05:19:45,868 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-11-07 05:19:45,868 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-11-07 05:19:45,869 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-11-07 05:19:45,869 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-11-07 05:19:45,869 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-11-07 05:19:45,869 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-11-07 05:19:45,869 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-11-07 05:19:45,869 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-11-07 05:19:45,870 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-11-07 05:19:45,870 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-11-07 05:19:45,870 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-11-07 05:19:45,870 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-11-07 05:19:45,870 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-11-07 05:19:45,870 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-11-07 05:19:45,871 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-11-07 05:19:45,871 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-11-07 05:19:45,871 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-11-07 05:19:45,871 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-11-07 05:19:45,871 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-11-07 05:19:45,871 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-11-07 05:19:45,872 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-11-07 05:19:45,872 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-11-07 05:19:45,872 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-11-07 05:19:45,872 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-11-07 05:19:45,872 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-11-07 05:19:45,873 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-11-07 05:19:45,873 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-11-07 05:19:45,873 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-11-07 05:19:45,873 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-11-07 05:19:45,873 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-11-07 05:19:45,873 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-11-07 05:19:45,873 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-11-07 05:19:45,874 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-11-07 05:19:45,874 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-11-07 05:19:45,874 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-11-07 05:19:45,874 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-11-07 05:19:45,874 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-11-07 05:19:45,874 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-11-07 05:19:45,874 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-11-07 05:19:45,875 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-11-07 05:19:45,875 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-11-07 05:19:45,875 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-11-07 05:19:45,875 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-11-07 05:19:45,875 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-11-07 05:19:45,875 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-11-07 05:19:45,875 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-11-07 05:19:45,876 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-11-07 05:19:45,876 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-11-07 05:19:45,876 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-11-07 05:19:45,876 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-11-07 05:19:45,876 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-11-07 05:19:45,876 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-11-07 05:19:45,876 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 05:19:45,877 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-11-07 05:19:45,877 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-11-07 05:19:45,877 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-11-07 05:19:45,877 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-11-07 05:19:45,877 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-11-07 05:19:45,877 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-11-07 05:19:45,878 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-11-07 05:19:45,878 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-11-07 05:19:45,878 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-11-07 05:19:45,878 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-11-07 05:19:45,878 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-11-07 05:19:45,878 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-11-07 05:19:45,878 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-11-07 05:19:45,879 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-11-07 05:19:45,879 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-11-07 05:19:45,879 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-11-07 05:19:45,879 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-11-07 05:19:45,879 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-11-07 05:19:45,879 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-11-07 05:19:45,880 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-11-07 05:19:45,880 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-11-07 05:19:45,880 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-11-07 05:19:45,880 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-11-07 05:19:45,880 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-11-07 05:19:45,880 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-11-07 05:19:45,880 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-11-07 05:19:45,881 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-11-07 05:19:45,881 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-11-07 05:19:45,881 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-11-07 05:19:45,881 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-11-07 05:19:45,881 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-11-07 05:19:45,881 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-11-07 05:19:45,881 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-11-07 05:19:45,882 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-11-07 05:19:45,882 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-11-07 05:19:45,882 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-11-07 05:19:45,882 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-11-07 05:19:45,882 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-11-07 05:19:45,882 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-11-07 05:19:45,883 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-11-07 05:19:45,883 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-11-07 05:19:45,883 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-11-07 05:19:45,883 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-11-07 05:19:45,883 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-07 05:19:45,883 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 05:19:45,883 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-11-07 05:19:45,884 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-11-07 05:19:45,884 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 05:19:45,884 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 05:19:45,884 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 05:19:45,884 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-07 05:19:45,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-07 05:19:45,884 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-07 05:19:45,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 05:19:45,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 05:19:45,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 05:19:45,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 05:19:45,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 05:19:45,885 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 05:19:47,124 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 05:19:47,125 INFO L298 CfgBuilder]: Removed 30 assume(true) statements. [2020-11-07 05:19:47,128 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 05:19:47 BoogieIcfgContainer [2020-11-07 05:19:47,129 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 05:19:47,132 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 05:19:47,133 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 05:19:47,137 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 05:19:47,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 05:19:45" (1/3) ... [2020-11-07 05:19:47,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37678e95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 05:19:47, skipping insertion in model container [2020-11-07 05:19:47,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:19:45" (2/3) ... [2020-11-07 05:19:47,141 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37678e95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 05:19:47, skipping insertion in model container [2020-11-07 05:19:47,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 05:19:47" (3/3) ... [2020-11-07 05:19:47,143 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-01-1.i [2020-11-07 05:19:47,168 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 05:19:47,174 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 05:19:47,192 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 05:19:47,228 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 05:19:47,229 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 05:19:47,229 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-11-07 05:19:47,230 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 05:19:47,231 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 05:19:47,234 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 05:19:47,234 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 05:19:47,235 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 05:19:47,268 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states. [2020-11-07 05:19:47,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-07 05:19:47,285 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:19:47,293 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 05:19:47,294 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:19:47,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:19:47,307 INFO L82 PathProgramCache]: Analyzing trace with hash -296062564, now seen corresponding path program 1 times [2020-11-07 05:19:47,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:19:47,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [650545724] [2020-11-07 05:19:47,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:19:47,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:19:47,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:19:47,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:19:47,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:19:47,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [650545724] [2020-11-07 05:19:47,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:19:47,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-07 05:19:47,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780633478] [2020-11-07 05:19:47,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-07 05:19:47,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:19:47,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-07 05:19:47,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-07 05:19:47,758 INFO L87 Difference]: Start difference. First operand 181 states. Second operand 5 states. [2020-11-07 05:19:48,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:19:48,294 INFO L93 Difference]: Finished difference Result 357 states and 502 transitions. [2020-11-07 05:19:48,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-07 05:19:48,296 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-11-07 05:19:48,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:19:48,310 INFO L225 Difference]: With dead ends: 357 [2020-11-07 05:19:48,310 INFO L226 Difference]: Without dead ends: 186 [2020-11-07 05:19:48,317 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 [2020-11-07 05:19:48,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-11-07 05:19:48,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 159. [2020-11-07 05:19:48,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-11-07 05:19:48,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 179 transitions. [2020-11-07 05:19:48,393 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 179 transitions. Word has length 19 [2020-11-07 05:19:48,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:19:48,393 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 179 transitions. [2020-11-07 05:19:48,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-07 05:19:48,394 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 179 transitions. [2020-11-07 05:19:48,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-07 05:19:48,395 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:19:48,395 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 05:19:48,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 05:19:48,396 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:19:48,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:19:48,397 INFO L82 PathProgramCache]: Analyzing trace with hash -333799104, now seen corresponding path program 1 times [2020-11-07 05:19:48,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:19:48,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1841874151] [2020-11-07 05:19:48,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:19:48,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:19:48,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:19:48,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:19:48,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:19:48,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1841874151] [2020-11-07 05:19:48,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:19:48,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 05:19:48,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449962827] [2020-11-07 05:19:48,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 05:19:48,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:19:48,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 05:19:48,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 05:19:48,550 INFO L87 Difference]: Start difference. First operand 159 states and 179 transitions. Second operand 4 states. [2020-11-07 05:19:48,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:19:48,926 INFO L93 Difference]: Finished difference Result 167 states and 187 transitions. [2020-11-07 05:19:48,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 05:19:48,926 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-11-07 05:19:48,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:19:48,929 INFO L225 Difference]: With dead ends: 167 [2020-11-07 05:19:48,929 INFO L226 Difference]: Without dead ends: 160 [2020-11-07 05:19:48,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 05:19:48,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-11-07 05:19:48,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2020-11-07 05:19:48,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-11-07 05:19:48,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 180 transitions. [2020-11-07 05:19:48,956 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 180 transitions. Word has length 31 [2020-11-07 05:19:48,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:19:48,957 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 180 transitions. [2020-11-07 05:19:48,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 05:19:48,957 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 180 transitions. [2020-11-07 05:19:48,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-07 05:19:48,958 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:19:48,959 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 05:19:48,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 05:19:48,959 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:19:48,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:19:48,960 INFO L82 PathProgramCache]: Analyzing trace with hash -885790979, now seen corresponding path program 1 times [2020-11-07 05:19:48,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:19:48,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2068242379] [2020-11-07 05:19:48,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:19:48,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:19:49,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:19:49,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:19:49,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:19:49,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2068242379] [2020-11-07 05:19:49,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:19:49,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-07 05:19:49,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865902475] [2020-11-07 05:19:49,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 05:19:49,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:19:49,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 05:19:49,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-11-07 05:19:49,138 INFO L87 Difference]: Start difference. First operand 160 states and 180 transitions. Second operand 8 states. [2020-11-07 05:19:49,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:19:49,814 INFO L93 Difference]: Finished difference Result 245 states and 278 transitions. [2020-11-07 05:19:49,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-07 05:19:49,815 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-11-07 05:19:49,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:19:49,817 INFO L225 Difference]: With dead ends: 245 [2020-11-07 05:19:49,817 INFO L226 Difference]: Without dead ends: 238 [2020-11-07 05:19:49,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-11-07 05:19:49,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-11-07 05:19:49,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 155. [2020-11-07 05:19:49,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-11-07 05:19:49,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 174 transitions. [2020-11-07 05:19:49,846 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 174 transitions. Word has length 33 [2020-11-07 05:19:49,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:19:49,847 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 174 transitions. [2020-11-07 05:19:49,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 05:19:49,847 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 174 transitions. [2020-11-07 05:19:49,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-11-07 05:19:49,849 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:19:49,849 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 05:19:49,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 05:19:49,849 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:19:49,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:19:49,850 INFO L82 PathProgramCache]: Analyzing trace with hash 531390644, now seen corresponding path program 1 times [2020-11-07 05:19:49,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:19:49,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1471180568] [2020-11-07 05:19:49,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:19:49,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:19:49,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:19:49,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:19:50,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:19:50,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1471180568] [2020-11-07 05:19:50,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:19:50,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 05:19:50,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548285345] [2020-11-07 05:19:50,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 05:19:50,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:19:50,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 05:19:50,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-07 05:19:50,014 INFO L87 Difference]: Start difference. First operand 155 states and 174 transitions. Second operand 6 states. [2020-11-07 05:19:50,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:19:50,589 INFO L93 Difference]: Finished difference Result 357 states and 407 transitions. [2020-11-07 05:19:50,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 05:19:50,589 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 39 [2020-11-07 05:19:50,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:19:50,592 INFO L225 Difference]: With dead ends: 357 [2020-11-07 05:19:50,592 INFO L226 Difference]: Without dead ends: 237 [2020-11-07 05:19:50,593 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 [2020-11-07 05:19:50,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-11-07 05:19:50,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 158. [2020-11-07 05:19:50,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-11-07 05:19:50,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 177 transitions. [2020-11-07 05:19:50,622 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 177 transitions. Word has length 39 [2020-11-07 05:19:50,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:19:50,622 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 177 transitions. [2020-11-07 05:19:50,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 05:19:50,622 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 177 transitions. [2020-11-07 05:19:50,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-07 05:19:50,623 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:19:50,624 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 05:19:50,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 05:19:50,624 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:19:50,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:19:50,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1103718031, now seen corresponding path program 1 times [2020-11-07 05:19:50,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:19:50,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1449859568] [2020-11-07 05:19:50,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:19:50,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:19:50,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:19:50,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:19:50,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:19:50,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1449859568] [2020-11-07 05:19:50,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:19:50,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 05:19:50,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958928177] [2020-11-07 05:19:50,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 05:19:50,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:19:50,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 05:19:50,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-07 05:19:50,742 INFO L87 Difference]: Start difference. First operand 158 states and 177 transitions. Second operand 6 states. [2020-11-07 05:19:51,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:19:51,244 INFO L93 Difference]: Finished difference Result 259 states and 293 transitions. [2020-11-07 05:19:51,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-07 05:19:51,245 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2020-11-07 05:19:51,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:19:51,248 INFO L225 Difference]: With dead ends: 259 [2020-11-07 05:19:51,248 INFO L226 Difference]: Without dead ends: 228 [2020-11-07 05:19:51,249 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 [2020-11-07 05:19:51,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-11-07 05:19:51,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 158. [2020-11-07 05:19:51,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-11-07 05:19:51,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 176 transitions. [2020-11-07 05:19:51,286 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 176 transitions. Word has length 41 [2020-11-07 05:19:51,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:19:51,287 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 176 transitions. [2020-11-07 05:19:51,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 05:19:51,287 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 176 transitions. [2020-11-07 05:19:51,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-07 05:19:51,289 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:19:51,289 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 05:19:51,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-07 05:19:51,289 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:19:51,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:19:51,290 INFO L82 PathProgramCache]: Analyzing trace with hash -107537349, now seen corresponding path program 1 times [2020-11-07 05:19:51,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:19:51,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1935838882] [2020-11-07 05:19:51,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:19:51,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:19:51,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:19:51,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:19:51,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:19:51,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1935838882] [2020-11-07 05:19:51,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:19:51,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-11-07 05:19:51,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224247948] [2020-11-07 05:19:51,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-07 05:19:51,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:19:51,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-07 05:19:51,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-11-07 05:19:51,607 INFO L87 Difference]: Start difference. First operand 158 states and 176 transitions. Second operand 12 states. [2020-11-07 05:19:52,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:19:52,640 INFO L93 Difference]: Finished difference Result 276 states and 310 transitions. [2020-11-07 05:19:52,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-07 05:19:52,641 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2020-11-07 05:19:52,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:19:52,643 INFO L225 Difference]: With dead ends: 276 [2020-11-07 05:19:52,646 INFO L226 Difference]: Without dead ends: 271 [2020-11-07 05:19:52,647 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2020-11-07 05:19:52,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-11-07 05:19:52,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 173. [2020-11-07 05:19:52,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-11-07 05:19:52,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 192 transitions. [2020-11-07 05:19:52,688 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 192 transitions. Word has length 48 [2020-11-07 05:19:52,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:19:52,691 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 192 transitions. [2020-11-07 05:19:52,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-07 05:19:52,691 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 192 transitions. [2020-11-07 05:19:52,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-11-07 05:19:52,702 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:19:52,702 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 05:19:52,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-07 05:19:52,703 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:19:52,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:19:52,706 INFO L82 PathProgramCache]: Analyzing trace with hash -135462151, now seen corresponding path program 1 times [2020-11-07 05:19:52,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:19:52,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1266789805] [2020-11-07 05:19:52,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:19:52,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:19:52,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:19:52,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:19:52,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:19:52,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1266789805] [2020-11-07 05:19:52,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:19:52,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 05:19:52,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561743946] [2020-11-07 05:19:52,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 05:19:52,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:19:52,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 05:19:52,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 05:19:52,800 INFO L87 Difference]: Start difference. First operand 173 states and 192 transitions. Second operand 4 states. [2020-11-07 05:19:53,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:19:53,115 INFO L93 Difference]: Finished difference Result 272 states and 309 transitions. [2020-11-07 05:19:53,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 05:19:53,115 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 49 [2020-11-07 05:19:53,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:19:53,117 INFO L225 Difference]: With dead ends: 272 [2020-11-07 05:19:53,117 INFO L226 Difference]: Without dead ends: 209 [2020-11-07 05:19:53,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 05:19:53,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-11-07 05:19:53,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 176. [2020-11-07 05:19:53,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-11-07 05:19:53,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 196 transitions. [2020-11-07 05:19:53,148 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 196 transitions. Word has length 49 [2020-11-07 05:19:53,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:19:53,148 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 196 transitions. [2020-11-07 05:19:53,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 05:19:53,148 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 196 transitions. [2020-11-07 05:19:53,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-07 05:19:53,149 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:19:53,150 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 05:19:53,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-07 05:19:53,150 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:19:53,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:19:53,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1820914827, now seen corresponding path program 1 times [2020-11-07 05:19:53,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:19:53,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [753372076] [2020-11-07 05:19:53,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:19:53,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:19:53,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:19:53,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:19:53,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:19:53,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [753372076] [2020-11-07 05:19:53,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:19:53,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 05:19:53,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734884751] [2020-11-07 05:19:53,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 05:19:53,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:19:53,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 05:19:53,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 05:19:53,285 INFO L87 Difference]: Start difference. First operand 176 states and 196 transitions. Second operand 4 states. [2020-11-07 05:19:53,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:19:53,625 INFO L93 Difference]: Finished difference Result 179 states and 198 transitions. [2020-11-07 05:19:53,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 05:19:53,626 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2020-11-07 05:19:53,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:19:53,627 INFO L225 Difference]: With dead ends: 179 [2020-11-07 05:19:53,627 INFO L226 Difference]: Without dead ends: 175 [2020-11-07 05:19:53,628 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 05:19:53,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-11-07 05:19:53,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2020-11-07 05:19:53,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-11-07 05:19:53,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 194 transitions. [2020-11-07 05:19:53,655 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 194 transitions. Word has length 51 [2020-11-07 05:19:53,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:19:53,656 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 194 transitions. [2020-11-07 05:19:53,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 05:19:53,656 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 194 transitions. [2020-11-07 05:19:53,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-11-07 05:19:53,657 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:19:53,657 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 05:19:53,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-07 05:19:53,657 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:19:53,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:19:53,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1210911317, now seen corresponding path program 1 times [2020-11-07 05:19:53,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:19:53,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [345011135] [2020-11-07 05:19:53,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:19:53,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:19:53,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:19:53,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:19:53,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:19:53,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [345011135] [2020-11-07 05:19:53,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:19:53,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-11-07 05:19:53,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543952213] [2020-11-07 05:19:53,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-07 05:19:53,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:19:53,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-07 05:19:53,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-11-07 05:19:53,823 INFO L87 Difference]: Start difference. First operand 175 states and 194 transitions. Second operand 9 states. [2020-11-07 05:19:54,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:19:54,649 INFO L93 Difference]: Finished difference Result 356 states and 401 transitions. [2020-11-07 05:19:54,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-07 05:19:54,649 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 55 [2020-11-07 05:19:54,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:19:54,652 INFO L225 Difference]: With dead ends: 356 [2020-11-07 05:19:54,653 INFO L226 Difference]: Without dead ends: 291 [2020-11-07 05:19:54,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2020-11-07 05:19:54,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-11-07 05:19:54,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 194. [2020-11-07 05:19:54,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-11-07 05:19:54,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 214 transitions. [2020-11-07 05:19:54,690 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 214 transitions. Word has length 55 [2020-11-07 05:19:54,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:19:54,691 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 214 transitions. [2020-11-07 05:19:54,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-07 05:19:54,692 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 214 transitions. [2020-11-07 05:19:54,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-11-07 05:19:54,698 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:19:54,698 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 05:19:54,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-07 05:19:54,699 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:19:54,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:19:54,699 INFO L82 PathProgramCache]: Analyzing trace with hash -270220700, now seen corresponding path program 1 times [2020-11-07 05:19:54,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:19:54,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1339966660] [2020-11-07 05:19:54,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:19:54,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:19:54,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:19:54,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:19:54,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-07 05:19:54,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1339966660] [2020-11-07 05:19:54,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:19:54,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-07 05:19:54,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489650795] [2020-11-07 05:19:54,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 05:19:54,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:19:54,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 05:19:54,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-11-07 05:19:54,879 INFO L87 Difference]: Start difference. First operand 194 states and 214 transitions. Second operand 8 states. [2020-11-07 05:19:55,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:19:55,521 INFO L93 Difference]: Finished difference Result 275 states and 306 transitions. [2020-11-07 05:19:55,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-07 05:19:55,522 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 60 [2020-11-07 05:19:55,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:19:55,524 INFO L225 Difference]: With dead ends: 275 [2020-11-07 05:19:55,524 INFO L226 Difference]: Without dead ends: 245 [2020-11-07 05:19:55,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-11-07 05:19:55,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-11-07 05:19:55,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 229. [2020-11-07 05:19:55,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-11-07 05:19:55,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 256 transitions. [2020-11-07 05:19:55,569 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 256 transitions. Word has length 60 [2020-11-07 05:19:55,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:19:55,570 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 256 transitions. [2020-11-07 05:19:55,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 05:19:55,570 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 256 transitions. [2020-11-07 05:19:55,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-11-07 05:19:55,571 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:19:55,571 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 05:19:55,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-07 05:19:55,571 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:19:55,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:19:55,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1306628089, now seen corresponding path program 1 times [2020-11-07 05:19:55,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:19:55,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1979459968] [2020-11-07 05:19:55,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:19:55,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:19:56,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:19:56,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:19:56,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:19:56,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1979459968] [2020-11-07 05:19:56,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:19:56,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-11-07 05:19:56,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688486154] [2020-11-07 05:19:56,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-07 05:19:56,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:19:56,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-07 05:19:56,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2020-11-07 05:19:56,242 INFO L87 Difference]: Start difference. First operand 229 states and 256 transitions. Second operand 16 states. [2020-11-07 05:20:00,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:20:00,089 INFO L93 Difference]: Finished difference Result 631 states and 711 transitions. [2020-11-07 05:20:00,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-07 05:20:00,090 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 60 [2020-11-07 05:20:00,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:20:00,095 INFO L225 Difference]: With dead ends: 631 [2020-11-07 05:20:00,095 INFO L226 Difference]: Without dead ends: 626 [2020-11-07 05:20:00,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=470, Invalid=1980, Unknown=0, NotChecked=0, Total=2450 [2020-11-07 05:20:00,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2020-11-07 05:20:00,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 246. [2020-11-07 05:20:00,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-11-07 05:20:00,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 274 transitions. [2020-11-07 05:20:00,169 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 274 transitions. Word has length 60 [2020-11-07 05:20:00,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:20:00,169 INFO L481 AbstractCegarLoop]: Abstraction has 246 states and 274 transitions. [2020-11-07 05:20:00,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-07 05:20:00,169 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 274 transitions. [2020-11-07 05:20:00,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-11-07 05:20:00,170 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:20:00,171 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 05:20:00,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-07 05:20:00,171 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:20:00,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:20:00,172 INFO L82 PathProgramCache]: Analyzing trace with hash 907155636, now seen corresponding path program 1 times [2020-11-07 05:20:00,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:20:00,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1920923842] [2020-11-07 05:20:00,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:20:00,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:20:00,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:20:00,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:20:00,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:20:00,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1920923842] [2020-11-07 05:20:00,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:20:00,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 05:20:00,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133171813] [2020-11-07 05:20:00,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 05:20:00,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:20:00,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 05:20:00,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 05:20:00,241 INFO L87 Difference]: Start difference. First operand 246 states and 274 transitions. Second operand 4 states. [2020-11-07 05:20:00,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:20:00,606 INFO L93 Difference]: Finished difference Result 254 states and 282 transitions. [2020-11-07 05:20:00,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 05:20:00,606 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 62 [2020-11-07 05:20:00,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:20:00,609 INFO L225 Difference]: With dead ends: 254 [2020-11-07 05:20:00,609 INFO L226 Difference]: Without dead ends: 247 [2020-11-07 05:20:00,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 05:20:00,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-11-07 05:20:00,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2020-11-07 05:20:00,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-11-07 05:20:00,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 275 transitions. [2020-11-07 05:20:00,669 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 275 transitions. Word has length 62 [2020-11-07 05:20:00,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:20:00,670 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 275 transitions. [2020-11-07 05:20:00,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 05:20:00,670 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 275 transitions. [2020-11-07 05:20:00,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-11-07 05:20:00,671 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:20:00,671 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 05:20:00,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-07 05:20:00,672 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:20:00,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:20:00,672 INFO L82 PathProgramCache]: Analyzing trace with hash 2063195505, now seen corresponding path program 1 times [2020-11-07 05:20:00,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:20:00,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [683810098] [2020-11-07 05:20:00,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:20:00,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:20:00,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:20:00,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:20:00,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:20:00,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [683810098] [2020-11-07 05:20:00,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:20:00,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-07 05:20:00,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574341909] [2020-11-07 05:20:00,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 05:20:00,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:20:00,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 05:20:00,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-11-07 05:20:00,798 INFO L87 Difference]: Start difference. First operand 247 states and 275 transitions. Second operand 8 states. [2020-11-07 05:20:01,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:20:01,500 INFO L93 Difference]: Finished difference Result 270 states and 299 transitions. [2020-11-07 05:20:01,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-07 05:20:01,501 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 64 [2020-11-07 05:20:01,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:20:01,504 INFO L225 Difference]: With dead ends: 270 [2020-11-07 05:20:01,504 INFO L226 Difference]: Without dead ends: 263 [2020-11-07 05:20:01,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-11-07 05:20:01,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-11-07 05:20:01,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 242. [2020-11-07 05:20:01,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-11-07 05:20:01,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 269 transitions. [2020-11-07 05:20:01,559 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 269 transitions. Word has length 64 [2020-11-07 05:20:01,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:20:01,559 INFO L481 AbstractCegarLoop]: Abstraction has 242 states and 269 transitions. [2020-11-07 05:20:01,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 05:20:01,560 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 269 transitions. [2020-11-07 05:20:01,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-11-07 05:20:01,561 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:20:01,561 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 05:20:01,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-07 05:20:01,561 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:20:01,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:20:01,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1588921325, now seen corresponding path program 1 times [2020-11-07 05:20:01,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:20:01,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [442699560] [2020-11-07 05:20:01,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:20:01,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 05:20:01,584 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 05:20:01,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 05:20:01,602 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 05:20:01,644 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-11-07 05:20:01,644 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-07 05:20:01,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-07 05:20:01,701 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 05:20:01 BoogieIcfgContainer [2020-11-07 05:20:01,702 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 05:20:01,704 INFO L168 Benchmark]: Toolchain (without parser) took 16669.59 ms. Allocated memory was 151.0 MB in the beginning and 324.0 MB in the end (delta: 173.0 MB). Free memory was 126.3 MB in the beginning and 187.3 MB in the end (delta: -61.0 MB). Peak memory consumption was 113.2 MB. Max. memory is 8.0 GB. [2020-11-07 05:20:01,705 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 151.0 MB. Free memory was 125.3 MB in the beginning and 125.2 MB in the end (delta: 80.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 05:20:01,706 INFO L168 Benchmark]: CACSL2BoogieTranslator took 592.48 ms. Allocated memory is still 151.0 MB. Free memory was 125.6 MB in the beginning and 103.0 MB in the end (delta: 22.7 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2020-11-07 05:20:01,707 INFO L168 Benchmark]: Boogie Preprocessor took 127.22 ms. Allocated memory is still 151.0 MB. Free memory was 103.0 MB in the beginning and 132.0 MB in the end (delta: -29.1 MB). Peak memory consumption was 6.0 MB. Max. memory is 8.0 GB. [2020-11-07 05:20:01,708 INFO L168 Benchmark]: RCFGBuilder took 1355.39 ms. Allocated memory is still 151.0 MB. Free memory was 132.0 MB in the beginning and 129.1 MB in the end (delta: 2.9 MB). Peak memory consumption was 63.8 MB. Max. memory is 8.0 GB. [2020-11-07 05:20:01,709 INFO L168 Benchmark]: TraceAbstraction took 14569.25 ms. Allocated memory was 151.0 MB in the beginning and 324.0 MB in the end (delta: 173.0 MB). Free memory was 128.5 MB in the beginning and 187.3 MB in the end (delta: -58.8 MB). Peak memory consumption was 114.7 MB. Max. memory is 8.0 GB. [2020-11-07 05:20:01,712 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 151.0 MB. Free memory was 125.3 MB in the beginning and 125.2 MB in the end (delta: 80.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 592.48 ms. Allocated memory is still 151.0 MB. Free memory was 125.6 MB in the beginning and 103.0 MB in the end (delta: 22.7 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 127.22 ms. Allocated memory is still 151.0 MB. Free memory was 103.0 MB in the beginning and 132.0 MB in the end (delta: -29.1 MB). Peak memory consumption was 6.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1355.39 ms. Allocated memory is still 151.0 MB. Free memory was 132.0 MB in the beginning and 129.1 MB in the end (delta: 2.9 MB). Peak memory consumption was 63.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 14569.25 ms. Allocated memory was 151.0 MB in the beginning and 324.0 MB in the end (delta: 173.0 MB). Free memory was 128.5 MB in the beginning and 187.3 MB in the end (delta: -58.8 MB). Peak memory consumption was 114.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 992]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L1003] SLL* list = malloc(sizeof(SLL)); VAL [list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1004] list->next = ((void*)0) VAL [list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1005] list->prev = ((void*)0) VAL [list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1006] COND FALSE !(!(list != ((void*)0))) VAL [list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1006] COND FALSE !(__VERIFIER_nondet_int()) VAL [__VERIFIER_nondet_int()=0, list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1006] list->inner = malloc(sizeof(SLL)) VAL [list={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1006] EXPR list->inner VAL [list={-1:0}, list->inner={-2:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1006] list->inner->next = ((void*)0) VAL [list={-1:0}, list->inner={-2:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1006] EXPR list->inner VAL [list={-1:0}, list->inner={-2:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1006] list->inner->inner = ((void*)0) VAL [list={-1:0}, list->inner={-2:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1006] EXPR list->inner VAL [list={-1:0}, list->inner={-2:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1006] EXPR list->inner != ((void*)0) || list->inner == ((void*)0) VAL [list={-1:0}, list->inner={-2:0}, list->inner != ((void*)0) || list->inner == ((void*)0)=1, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1006] COND FALSE !(!(list->inner != ((void*)0) || list->inner == ((void*)0))) VAL [list={-1:0}, list->inner={-2:0}, list->inner != ((void*)0) || list->inner == ((void*)0)=1, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1008] SLL* end = list; VAL [end={-1:0}, list={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1011] COND FALSE !(__VERIFIER_nondet_int()) VAL [__VERIFIER_nondet_int()=0, end={-1:0}, list={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1022] end = ((void*)0) VAL [end={0:0}, list={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1023] end = list VAL [end={-1:0}, list={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1026] COND FALSE !(!(((void*)0) != end)) VAL [end={-1:0}, list={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1028] COND TRUE ((void*)0) != end VAL [end={-1:0}, list={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1030] int len = 0; VAL [end={-1:0}, len=0, list={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1031] EXPR end->inner VAL [end={-1:0}, end->inner={-2:0}, len=0, list={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1031] SLL* inner = end->inner; VAL [end={-1:0}, end->inner={-2:0}, inner={-2:0}, len=0, list={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1032] COND TRUE ((void*)0) != inner VAL [end={-1:0}, inner={-2:0}, len=0, list={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1034] COND TRUE len == 0 VAL [end={-1:0}, inner={-2:0}, len=0, list={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1035] len = 1 VAL [end={-1:0}, inner={-2:0}, len=1, list={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1038] COND FALSE !(!(((void*)0) != inner)) VAL [end={-1:0}, inner={-2:0}, len=1, list={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1039] EXPR inner->inner VAL [end={-1:0}, inner={-2:0}, inner->inner={0:0}, len=1, list={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1039] COND FALSE !(!(((void*)0) == inner->inner)) VAL [end={-1:0}, inner={-2:0}, inner->inner={0:0}, len=1, list={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1040] EXPR inner->next VAL [end={-1:0}, inner={-2:0}, inner->next={0:0}, len=1, list={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1040] COND TRUE !(((void*)0) != inner->next) VAL [end={-1:0}, inner={-2:0}, inner->next={0:0}, len=1, list={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1040] CALL reach_error() [L992] COND FALSE !(0) [L992] __assert_fail ("0", "dll-01-1.c", 12, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 181 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 14.4s, OverallIterations: 14, TraceHistogramMax: 1, AutomataDifference: 10.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2177 SDtfs, 3343 SDslu, 5805 SDs, 0 SdLazy, 4491 SolverSat, 317 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 178 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 3.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=247occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 13 MinimizatonAttempts, 904 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 676 NumberOfCodeBlocks, 676 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 599 ConstructedInterpolants, 0 QuantifiedInterpolants, 199691 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 13 InterpolantComputations, 13 PerfectInterpolantSequences, 1/1 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...