/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --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-rb-sentinel-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 22:20:28,822 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 22:20:28,825 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 22:20:28,852 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 22:20:28,853 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 22:20:28,854 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 22:20:28,856 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 22:20:28,858 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 22:20:28,860 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 22:20:28,861 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 22:20:28,862 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 22:20:28,864 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 22:20:28,864 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 22:20:28,865 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 22:20:28,867 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 22:20:28,868 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 22:20:28,869 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 22:20:28,870 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 22:20:28,872 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 22:20:28,875 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 22:20:28,876 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 22:20:28,878 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 22:20:28,881 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 22:20:28,884 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 22:20:28,890 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 22:20:28,890 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 22:20:28,891 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 22:20:28,894 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 22:20:28,894 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 22:20:28,896 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 22:20:28,896 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 22:20:28,898 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 22:20:28,899 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 22:20:28,901 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 22:20:28,903 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 22:20:28,903 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 22:20:28,904 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 22:20:28,904 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 22:20:28,904 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 22:20:28,906 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 22:20:28,909 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 22:20:28,910 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 22:20:28,939 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 22:20:28,940 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 22:20:28,944 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 22:20:28,944 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 22:20:28,944 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 22:20:28,946 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 22:20:28,947 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 22:20:28,947 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 22:20:28,947 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 22:20:28,947 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 22:20:28,947 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 22:20:28,948 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 22:20:28,949 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 22:20:28,949 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 22:20:28,950 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 22:20:28,950 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 22:20:28,950 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 22:20:28,950 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 22:20:28,950 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 22:20:28,951 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 22:20:28,951 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 22:20:28,951 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 22:20:28,951 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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 [2020-08-22 22:20:29,258 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 22:20:29,279 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 22:20:29,286 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 22:20:29,288 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 22:20:29,288 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 22:20:29,289 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-rb-sentinel-1.i [2020-08-22 22:20:29,367 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77bb7c5fc/6c11ab68e18f407193cd6451ebbdc5a0/FLAG3e59a30ee [2020-08-22 22:20:30,006 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 22:20:30,007 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/dll-rb-sentinel-1.i [2020-08-22 22:20:30,021 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77bb7c5fc/6c11ab68e18f407193cd6451ebbdc5a0/FLAG3e59a30ee [2020-08-22 22:20:30,204 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77bb7c5fc/6c11ab68e18f407193cd6451ebbdc5a0 [2020-08-22 22:20:30,217 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 22:20:30,219 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 22:20:30,221 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 22:20:30,221 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 22:20:30,225 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 22:20:30,226 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 10:20:30" (1/1) ... [2020-08-22 22:20:30,230 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73cae183 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:20:30, skipping insertion in model container [2020-08-22 22:20:30,230 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 10:20:30" (1/1) ... [2020-08-22 22:20:30,239 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 22:20:30,293 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 22:20:30,790 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 22:20:30,803 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 22:20:30,861 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 22:20:30,927 INFO L208 MainTranslator]: Completed translation [2020-08-22 22:20:30,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:20:30 WrapperNode [2020-08-22 22:20:30,928 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 22:20:30,929 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 22:20:30,930 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 22:20:30,930 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 22:20:30,948 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:20:30" (1/1) ... [2020-08-22 22:20:30,949 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:20:30" (1/1) ... [2020-08-22 22:20:30,969 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:20:30" (1/1) ... [2020-08-22 22:20:30,970 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:20:30" (1/1) ... [2020-08-22 22:20:30,991 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:20:30" (1/1) ... [2020-08-22 22:20:31,001 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:20:30" (1/1) ... [2020-08-22 22:20:31,008 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:20:30" (1/1) ... [2020-08-22 22:20:31,015 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 22:20:31,016 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 22:20:31,016 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 22:20:31,016 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 22:20:31,017 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:20:30" (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 [2020-08-22 22:20:31,085 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 22:20:31,086 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 22:20:31,086 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 22:20:31,086 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-08-22 22:20:31,087 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-08-22 22:20:31,087 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-08-22 22:20:31,087 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-08-22 22:20:31,087 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-08-22 22:20:31,087 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-08-22 22:20:31,087 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-08-22 22:20:31,088 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-08-22 22:20:31,088 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-08-22 22:20:31,088 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-08-22 22:20:31,088 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-08-22 22:20:31,088 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-08-22 22:20:31,089 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-08-22 22:20:31,089 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-08-22 22:20:31,089 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-08-22 22:20:31,089 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-08-22 22:20:31,089 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-08-22 22:20:31,090 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-08-22 22:20:31,090 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-08-22 22:20:31,090 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-08-22 22:20:31,090 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-08-22 22:20:31,091 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-08-22 22:20:31,091 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-08-22 22:20:31,091 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-08-22 22:20:31,091 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-08-22 22:20:31,091 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-08-22 22:20:31,091 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-08-22 22:20:31,092 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-08-22 22:20:31,092 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-08-22 22:20:31,092 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-08-22 22:20:31,092 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-08-22 22:20:31,092 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-08-22 22:20:31,092 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-08-22 22:20:31,093 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-08-22 22:20:31,093 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-08-22 22:20:31,093 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-08-22 22:20:31,093 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-08-22 22:20:31,093 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-08-22 22:20:31,093 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-08-22 22:20:31,094 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-08-22 22:20:31,094 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-08-22 22:20:31,094 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-08-22 22:20:31,094 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-08-22 22:20:31,094 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-08-22 22:20:31,094 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-08-22 22:20:31,095 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-08-22 22:20:31,095 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-08-22 22:20:31,095 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-08-22 22:20:31,095 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-08-22 22:20:31,095 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-08-22 22:20:31,095 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-22 22:20:31,095 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-22 22:20:31,096 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-22 22:20:31,096 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-22 22:20:31,096 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-08-22 22:20:31,096 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-08-22 22:20:31,096 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-22 22:20:31,096 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-08-22 22:20:31,097 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-08-22 22:20:31,097 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 22:20:31,097 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-08-22 22:20:31,097 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-08-22 22:20:31,097 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-08-22 22:20:31,098 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-22 22:20:31,098 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-08-22 22:20:31,098 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-08-22 22:20:31,098 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-08-22 22:20:31,098 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-08-22 22:20:31,098 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-08-22 22:20:31,099 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-08-22 22:20:31,099 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-08-22 22:20:31,099 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-08-22 22:20:31,099 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-08-22 22:20:31,100 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-08-22 22:20:31,100 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-08-22 22:20:31,100 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-08-22 22:20:31,100 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-08-22 22:20:31,100 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-08-22 22:20:31,100 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-08-22 22:20:31,100 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-08-22 22:20:31,101 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-08-22 22:20:31,101 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-08-22 22:20:31,101 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-08-22 22:20:31,101 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-08-22 22:20:31,101 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-08-22 22:20:31,101 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-08-22 22:20:31,102 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-08-22 22:20:31,102 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-08-22 22:20:31,102 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-08-22 22:20:31,102 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-08-22 22:20:31,102 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-08-22 22:20:31,102 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-08-22 22:20:31,103 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-08-22 22:20:31,103 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-08-22 22:20:31,103 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-08-22 22:20:31,103 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-08-22 22:20:31,103 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-08-22 22:20:31,103 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-08-22 22:20:31,103 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-08-22 22:20:31,104 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-08-22 22:20:31,104 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-08-22 22:20:31,104 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-08-22 22:20:31,104 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-08-22 22:20:31,104 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 22:20:31,104 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 22:20:31,105 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 22:20:31,105 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-22 22:20:31,105 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-22 22:20:31,105 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 22:20:31,105 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-22 22:20:31,105 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 22:20:31,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 22:20:31,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 22:20:31,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 22:20:31,911 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 22:20:31,912 INFO L295 CfgBuilder]: Removed 17 assume(true) statements. [2020-08-22 22:20:31,924 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 10:20:31 BoogieIcfgContainer [2020-08-22 22:20:31,924 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 22:20:31,929 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 22:20:31,929 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 22:20:31,934 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 22:20:31,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 10:20:30" (1/3) ... [2020-08-22 22:20:31,935 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8ff5b9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 10:20:31, skipping insertion in model container [2020-08-22 22:20:31,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:20:30" (2/3) ... [2020-08-22 22:20:31,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8ff5b9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 10:20:31, skipping insertion in model container [2020-08-22 22:20:31,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 10:20:31" (3/3) ... [2020-08-22 22:20:31,939 INFO L109 eAbstractionObserver]: Analyzing ICFG dll-rb-sentinel-1.i [2020-08-22 22:20:31,955 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 22:20:31,969 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2020-08-22 22:20:31,985 INFO L251 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2020-08-22 22:20:32,008 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 22:20:32,008 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 22:20:32,009 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 22:20:32,009 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 22:20:32,009 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 22:20:32,009 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 22:20:32,010 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 22:20:32,010 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 22:20:32,033 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states. [2020-08-22 22:20:32,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 22:20:32,046 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:20:32,048 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] [2020-08-22 22:20:32,049 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:20:32,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:20:32,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1523709425, now seen corresponding path program 1 times [2020-08-22 22:20:32,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:20:32,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1175679075] [2020-08-22 22:20:32,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:20:32,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:20:32,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:20:32,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:20:32,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:20:32,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1175679075] [2020-08-22 22:20:32,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:20:32,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 22:20:32,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65875720] [2020-08-22 22:20:32,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 22:20:32,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:20:32,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 22:20:32,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 22:20:32,413 INFO L87 Difference]: Start difference. First operand 123 states. Second operand 3 states. [2020-08-22 22:20:32,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:20:32,791 INFO L93 Difference]: Finished difference Result 228 states and 286 transitions. [2020-08-22 22:20:32,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 22:20:32,795 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-22 22:20:32,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:20:32,818 INFO L225 Difference]: With dead ends: 228 [2020-08-22 22:20:32,818 INFO L226 Difference]: Without dead ends: 100 [2020-08-22 22:20:32,828 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 22:20:32,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-08-22 22:20:32,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2020-08-22 22:20:32,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-08-22 22:20:32,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 103 transitions. [2020-08-22 22:20:32,931 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 103 transitions. Word has length 23 [2020-08-22 22:20:32,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:20:32,932 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 103 transitions. [2020-08-22 22:20:32,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 22:20:32,932 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 103 transitions. [2020-08-22 22:20:32,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 22:20:32,935 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:20:32,935 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] [2020-08-22 22:20:32,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 22:20:32,936 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:20:32,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:20:32,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1887154194, now seen corresponding path program 1 times [2020-08-22 22:20:32,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:20:32,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [139343384] [2020-08-22 22:20:32,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:20:33,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:20:33,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:20:33,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:20:33,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:20:33,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [139343384] [2020-08-22 22:20:33,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:20:33,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 22:20:33,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652620596] [2020-08-22 22:20:33,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 22:20:33,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:20:33,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 22:20:33,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-22 22:20:33,126 INFO L87 Difference]: Start difference. First operand 100 states and 103 transitions. Second operand 8 states. [2020-08-22 22:20:33,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:20:33,581 INFO L93 Difference]: Finished difference Result 121 states and 126 transitions. [2020-08-22 22:20:33,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 22:20:33,582 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-08-22 22:20:33,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:20:33,584 INFO L225 Difference]: With dead ends: 121 [2020-08-22 22:20:33,584 INFO L226 Difference]: Without dead ends: 119 [2020-08-22 22:20:33,586 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-08-22 22:20:33,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-08-22 22:20:33,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 98. [2020-08-22 22:20:33,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-08-22 22:20:33,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 101 transitions. [2020-08-22 22:20:33,608 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 101 transitions. Word has length 25 [2020-08-22 22:20:33,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:20:33,609 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 101 transitions. [2020-08-22 22:20:33,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 22:20:33,609 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 101 transitions. [2020-08-22 22:20:33,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-22 22:20:33,610 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:20:33,611 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] [2020-08-22 22:20:33,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 22:20:33,611 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:20:33,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:20:33,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1939387545, now seen corresponding path program 1 times [2020-08-22 22:20:33,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:20:33,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1982369710] [2020-08-22 22:20:33,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:20:33,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:20:33,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:20:33,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:20:33,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:20:33,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1982369710] [2020-08-22 22:20:33,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:20:33,907 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-22 22:20:33,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567723868] [2020-08-22 22:20:33,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 22:20:33,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:20:33,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 22:20:33,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-08-22 22:20:33,909 INFO L87 Difference]: Start difference. First operand 98 states and 101 transitions. Second operand 9 states. [2020-08-22 22:20:34,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:20:34,418 INFO L93 Difference]: Finished difference Result 146 states and 152 transitions. [2020-08-22 22:20:34,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 22:20:34,419 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-08-22 22:20:34,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:20:34,421 INFO L225 Difference]: With dead ends: 146 [2020-08-22 22:20:34,422 INFO L226 Difference]: Without dead ends: 143 [2020-08-22 22:20:34,423 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2020-08-22 22:20:34,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-08-22 22:20:34,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 107. [2020-08-22 22:20:34,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-08-22 22:20:34,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2020-08-22 22:20:34,481 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 29 [2020-08-22 22:20:34,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:20:34,481 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2020-08-22 22:20:34,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 22:20:34,482 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2020-08-22 22:20:34,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-22 22:20:34,484 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:20:34,484 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] [2020-08-22 22:20:34,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 22:20:34,485 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:20:34,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:20:34,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1026590761, now seen corresponding path program 1 times [2020-08-22 22:20:34,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:20:34,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1774796275] [2020-08-22 22:20:34,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:20:34,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:20:34,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:20:34,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:20:34,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:20:34,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1774796275] [2020-08-22 22:20:34,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:20:34,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 22:20:34,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348573451] [2020-08-22 22:20:34,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 22:20:34,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:20:34,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 22:20:34,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 22:20:34,744 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand 6 states. [2020-08-22 22:20:35,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:20:35,090 INFO L93 Difference]: Finished difference Result 140 states and 146 transitions. [2020-08-22 22:20:35,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 22:20:35,092 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2020-08-22 22:20:35,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:20:35,094 INFO L225 Difference]: With dead ends: 140 [2020-08-22 22:20:35,095 INFO L226 Difference]: Without dead ends: 118 [2020-08-22 22:20:35,096 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-22 22:20:35,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-08-22 22:20:35,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 110. [2020-08-22 22:20:35,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-08-22 22:20:35,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 114 transitions. [2020-08-22 22:20:35,135 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 114 transitions. Word has length 38 [2020-08-22 22:20:35,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:20:35,136 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 114 transitions. [2020-08-22 22:20:35,136 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 22:20:35,136 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 114 transitions. [2020-08-22 22:20:35,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-22 22:20:35,143 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:20:35,143 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] [2020-08-22 22:20:35,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 22:20:35,144 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:20:35,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:20:35,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1637573847, now seen corresponding path program 1 times [2020-08-22 22:20:35,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:20:35,145 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [89259200] [2020-08-22 22:20:35,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:20:35,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:20:35,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:20:35,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:20:35,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:20:35,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [89259200] [2020-08-22 22:20:35,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:20:35,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 22:20:35,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770512369] [2020-08-22 22:20:35,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 22:20:35,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:20:35,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 22:20:35,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 22:20:35,252 INFO L87 Difference]: Start difference. First operand 110 states and 114 transitions. Second operand 5 states. [2020-08-22 22:20:35,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:20:35,522 INFO L93 Difference]: Finished difference Result 115 states and 119 transitions. [2020-08-22 22:20:35,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 22:20:35,523 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2020-08-22 22:20:35,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:20:35,525 INFO L225 Difference]: With dead ends: 115 [2020-08-22 22:20:35,525 INFO L226 Difference]: Without dead ends: 112 [2020-08-22 22:20:35,526 INFO L675 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 [2020-08-22 22:20:35,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-08-22 22:20:35,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 107. [2020-08-22 22:20:35,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-08-22 22:20:35,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2020-08-22 22:20:35,542 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 38 [2020-08-22 22:20:35,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:20:35,543 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2020-08-22 22:20:35,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 22:20:35,543 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2020-08-22 22:20:35,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-22 22:20:35,544 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:20:35,544 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] [2020-08-22 22:20:35,544 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 22:20:35,545 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:20:35,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:20:35,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1162057661, now seen corresponding path program 1 times [2020-08-22 22:20:35,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:20:35,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1136790478] [2020-08-22 22:20:35,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:20:35,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:20:35,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:20:35,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:20:35,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:20:35,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1136790478] [2020-08-22 22:20:35,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:20:35,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 22:20:35,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078837541] [2020-08-22 22:20:35,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 22:20:35,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:20:35,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 22:20:35,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 22:20:35,637 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand 5 states. [2020-08-22 22:20:35,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:20:35,871 INFO L93 Difference]: Finished difference Result 110 states and 114 transitions. [2020-08-22 22:20:35,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 22:20:35,871 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2020-08-22 22:20:35,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:20:35,873 INFO L225 Difference]: With dead ends: 110 [2020-08-22 22:20:35,873 INFO L226 Difference]: Without dead ends: 107 [2020-08-22 22:20:35,874 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 22:20:35,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-08-22 22:20:35,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 104. [2020-08-22 22:20:35,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-08-22 22:20:35,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 108 transitions. [2020-08-22 22:20:35,900 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 108 transitions. Word has length 42 [2020-08-22 22:20:35,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:20:35,900 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 108 transitions. [2020-08-22 22:20:35,900 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 22:20:35,900 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 108 transitions. [2020-08-22 22:20:35,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-08-22 22:20:35,906 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:20:35,907 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] [2020-08-22 22:20:35,907 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 22:20:35,907 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:20:35,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:20:35,908 INFO L82 PathProgramCache]: Analyzing trace with hash -41137780, now seen corresponding path program 1 times [2020-08-22 22:20:35,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:20:35,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2079451465] [2020-08-22 22:20:35,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:20:35,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:20:36,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:20:36,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:20:36,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:20:36,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2079451465] [2020-08-22 22:20:36,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:20:36,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-08-22 22:20:36,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481884023] [2020-08-22 22:20:36,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 22:20:36,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:20:36,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 22:20:36,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-08-22 22:20:36,171 INFO L87 Difference]: Start difference. First operand 104 states and 108 transitions. Second operand 14 states. [2020-08-22 22:20:36,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:20:36,913 INFO L93 Difference]: Finished difference Result 154 states and 160 transitions. [2020-08-22 22:20:36,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 22:20:36,915 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 44 [2020-08-22 22:20:36,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:20:36,916 INFO L225 Difference]: With dead ends: 154 [2020-08-22 22:20:36,916 INFO L226 Difference]: Without dead ends: 152 [2020-08-22 22:20:36,917 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2020-08-22 22:20:36,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-08-22 22:20:36,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 127. [2020-08-22 22:20:36,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-08-22 22:20:36,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 132 transitions. [2020-08-22 22:20:36,938 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 132 transitions. Word has length 44 [2020-08-22 22:20:36,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:20:36,939 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 132 transitions. [2020-08-22 22:20:36,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 22:20:36,939 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 132 transitions. [2020-08-22 22:20:36,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-22 22:20:36,940 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:20:36,940 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:20:36,940 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 22:20:36,941 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:20:36,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:20:36,941 INFO L82 PathProgramCache]: Analyzing trace with hash 784866741, now seen corresponding path program 1 times [2020-08-22 22:20:36,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:20:36,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1408918217] [2020-08-22 22:20:36,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:20:36,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:20:37,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:20:37,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:20:37,051 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:20:37,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1408918217] [2020-08-22 22:20:37,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:20:37,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 22:20:37,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209186698] [2020-08-22 22:20:37,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 22:20:37,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:20:37,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 22:20:37,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-22 22:20:37,056 INFO L87 Difference]: Start difference. First operand 127 states and 132 transitions. Second operand 7 states. [2020-08-22 22:20:37,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:20:37,495 INFO L93 Difference]: Finished difference Result 159 states and 165 transitions. [2020-08-22 22:20:37,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 22:20:37,495 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 45 [2020-08-22 22:20:37,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:20:37,497 INFO L225 Difference]: With dead ends: 159 [2020-08-22 22:20:37,497 INFO L226 Difference]: Without dead ends: 120 [2020-08-22 22:20:37,498 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-08-22 22:20:37,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-08-22 22:20:37,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2020-08-22 22:20:37,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-08-22 22:20:37,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 124 transitions. [2020-08-22 22:20:37,519 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 124 transitions. Word has length 45 [2020-08-22 22:20:37,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:20:37,519 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 124 transitions. [2020-08-22 22:20:37,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 22:20:37,520 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 124 transitions. [2020-08-22 22:20:37,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-22 22:20:37,520 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:20:37,521 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] [2020-08-22 22:20:37,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 22:20:37,521 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:20:37,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:20:37,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1051665877, now seen corresponding path program 1 times [2020-08-22 22:20:37,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:20:37,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1320718005] [2020-08-22 22:20:37,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:20:37,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:20:37,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:20:37,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:20:37,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:20:37,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1320718005] [2020-08-22 22:20:37,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:20:37,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2020-08-22 22:20:37,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80915988] [2020-08-22 22:20:37,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-22 22:20:37,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:20:37,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-22 22:20:37,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2020-08-22 22:20:37,951 INFO L87 Difference]: Start difference. First operand 120 states and 124 transitions. Second operand 19 states. [2020-08-22 22:20:39,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:20:39,398 INFO L93 Difference]: Finished difference Result 187 states and 195 transitions. [2020-08-22 22:20:39,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-22 22:20:39,399 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 54 [2020-08-22 22:20:39,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:20:39,400 INFO L225 Difference]: With dead ends: 187 [2020-08-22 22:20:39,401 INFO L226 Difference]: Without dead ends: 185 [2020-08-22 22:20:39,402 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=294, Invalid=1112, Unknown=0, NotChecked=0, Total=1406 [2020-08-22 22:20:39,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-08-22 22:20:39,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 167. [2020-08-22 22:20:39,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-08-22 22:20:39,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 174 transitions. [2020-08-22 22:20:39,431 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 174 transitions. Word has length 54 [2020-08-22 22:20:39,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:20:39,432 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 174 transitions. [2020-08-22 22:20:39,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-22 22:20:39,432 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 174 transitions. [2020-08-22 22:20:39,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-22 22:20:39,433 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:20:39,433 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:20:39,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 22:20:39,434 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:20:39,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:20:39,434 INFO L82 PathProgramCache]: Analyzing trace with hash 999535374, now seen corresponding path program 1 times [2020-08-22 22:20:39,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:20:39,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1484546496] [2020-08-22 22:20:39,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:20:39,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:20:40,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:20:40,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:20:40,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:20:40,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1484546496] [2020-08-22 22:20:40,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:20:40,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-22 22:20:40,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142598587] [2020-08-22 22:20:40,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 22:20:40,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:20:40,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 22:20:40,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-08-22 22:20:40,076 INFO L87 Difference]: Start difference. First operand 167 states and 174 transitions. Second operand 17 states. [2020-08-22 22:20:41,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:20:41,228 INFO L93 Difference]: Finished difference Result 224 states and 233 transitions. [2020-08-22 22:20:41,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 22:20:41,228 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 55 [2020-08-22 22:20:41,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:20:41,235 INFO L225 Difference]: With dead ends: 224 [2020-08-22 22:20:41,236 INFO L226 Difference]: Without dead ends: 221 [2020-08-22 22:20:41,237 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=252, Invalid=740, Unknown=0, NotChecked=0, Total=992 [2020-08-22 22:20:41,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-08-22 22:20:41,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 177. [2020-08-22 22:20:41,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-08-22 22:20:41,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 185 transitions. [2020-08-22 22:20:41,266 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 185 transitions. Word has length 55 [2020-08-22 22:20:41,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:20:41,267 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 185 transitions. [2020-08-22 22:20:41,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 22:20:41,267 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 185 transitions. [2020-08-22 22:20:41,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-22 22:20:41,268 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:20:41,268 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:20:41,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 22:20:41,269 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:20:41,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:20:41,269 INFO L82 PathProgramCache]: Analyzing trace with hash 754417445, now seen corresponding path program 1 times [2020-08-22 22:20:41,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:20:41,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [520987680] [2020-08-22 22:20:41,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:20:41,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:20:42,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:20:42,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:20:42,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:20:42,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [520987680] [2020-08-22 22:20:42,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:20:42,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-22 22:20:42,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51237343] [2020-08-22 22:20:42,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-22 22:20:42,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:20:42,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-22 22:20:42,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-08-22 22:20:42,142 INFO L87 Difference]: Start difference. First operand 177 states and 185 transitions. Second operand 23 states. [2020-08-22 22:20:43,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:20:43,807 INFO L93 Difference]: Finished difference Result 254 states and 264 transitions. [2020-08-22 22:20:43,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-22 22:20:43,809 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 65 [2020-08-22 22:20:43,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:20:43,812 INFO L225 Difference]: With dead ends: 254 [2020-08-22 22:20:43,812 INFO L226 Difference]: Without dead ends: 251 [2020-08-22 22:20:43,814 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=436, Invalid=1544, Unknown=0, NotChecked=0, Total=1980 [2020-08-22 22:20:43,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-08-22 22:20:43,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 201. [2020-08-22 22:20:43,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-08-22 22:20:43,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 210 transitions. [2020-08-22 22:20:43,843 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 210 transitions. Word has length 65 [2020-08-22 22:20:43,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:20:43,843 INFO L479 AbstractCegarLoop]: Abstraction has 201 states and 210 transitions. [2020-08-22 22:20:43,844 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-22 22:20:43,844 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 210 transitions. [2020-08-22 22:20:43,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-08-22 22:20:43,844 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:20:43,845 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:20:43,845 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 22:20:43,845 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:20:43,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:20:43,846 INFO L82 PathProgramCache]: Analyzing trace with hash -736103817, now seen corresponding path program 1 times [2020-08-22 22:20:43,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:20:43,846 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [964524221] [2020-08-22 22:20:43,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:20:43,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:20:44,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:20:44,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:20:44,123 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-22 22:20:44,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [964524221] [2020-08-22 22:20:44,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:20:44,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-22 22:20:44,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774216923] [2020-08-22 22:20:44,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-22 22:20:44,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:20:44,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-22 22:20:44,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2020-08-22 22:20:44,126 INFO L87 Difference]: Start difference. First operand 201 states and 210 transitions. Second operand 19 states. [2020-08-22 22:20:45,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:20:45,281 INFO L93 Difference]: Finished difference Result 210 states and 218 transitions. [2020-08-22 22:20:45,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 22:20:45,282 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 70 [2020-08-22 22:20:45,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:20:45,283 INFO L225 Difference]: With dead ends: 210 [2020-08-22 22:20:45,284 INFO L226 Difference]: Without dead ends: 208 [2020-08-22 22:20:45,285 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=326, Invalid=934, Unknown=0, NotChecked=0, Total=1260 [2020-08-22 22:20:45,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-08-22 22:20:45,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 201. [2020-08-22 22:20:45,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-08-22 22:20:45,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 209 transitions. [2020-08-22 22:20:45,313 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 209 transitions. Word has length 70 [2020-08-22 22:20:45,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:20:45,313 INFO L479 AbstractCegarLoop]: Abstraction has 201 states and 209 transitions. [2020-08-22 22:20:45,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-22 22:20:45,314 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 209 transitions. [2020-08-22 22:20:45,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-08-22 22:20:45,314 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:20:45,314 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:20:45,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 22:20:45,315 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:20:45,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:20:45,315 INFO L82 PathProgramCache]: Analyzing trace with hash 715756074, now seen corresponding path program 1 times [2020-08-22 22:20:45,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:20:45,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [623672668] [2020-08-22 22:20:45,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:20:45,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:20:45,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:20:45,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:20:45,918 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:20:45,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [623672668] [2020-08-22 22:20:45,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:20:45,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-22 22:20:45,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462788031] [2020-08-22 22:20:45,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-22 22:20:45,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:20:45,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-22 22:20:45,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2020-08-22 22:20:45,920 INFO L87 Difference]: Start difference. First operand 201 states and 209 transitions. Second operand 25 states. [2020-08-22 22:20:48,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:20:48,118 INFO L93 Difference]: Finished difference Result 278 states and 289 transitions. [2020-08-22 22:20:48,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-08-22 22:20:48,119 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 71 [2020-08-22 22:20:48,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:20:48,121 INFO L225 Difference]: With dead ends: 278 [2020-08-22 22:20:48,121 INFO L226 Difference]: Without dead ends: 256 [2020-08-22 22:20:48,122 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=439, Invalid=2111, Unknown=0, NotChecked=0, Total=2550 [2020-08-22 22:20:48,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-08-22 22:20:48,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 217. [2020-08-22 22:20:48,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-08-22 22:20:48,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 225 transitions. [2020-08-22 22:20:48,155 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 225 transitions. Word has length 71 [2020-08-22 22:20:48,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:20:48,155 INFO L479 AbstractCegarLoop]: Abstraction has 217 states and 225 transitions. [2020-08-22 22:20:48,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-22 22:20:48,155 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 225 transitions. [2020-08-22 22:20:48,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-22 22:20:48,156 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:20:48,157 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:20:48,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 22:20:48,157 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:20:48,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:20:48,157 INFO L82 PathProgramCache]: Analyzing trace with hash 181469332, now seen corresponding path program 2 times [2020-08-22 22:20:48,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:20:48,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [164646206] [2020-08-22 22:20:48,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:20:48,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:20:48,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:20:48,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:20:48,501 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:20:48,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [164646206] [2020-08-22 22:20:48,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:20:48,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-22 22:20:48,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764828425] [2020-08-22 22:20:48,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-22 22:20:48,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:20:48,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-22 22:20:48,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2020-08-22 22:20:48,504 INFO L87 Difference]: Start difference. First operand 217 states and 225 transitions. Second operand 19 states. [2020-08-22 22:20:49,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:20:49,908 INFO L93 Difference]: Finished difference Result 258 states and 267 transitions. [2020-08-22 22:20:49,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-22 22:20:49,908 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 78 [2020-08-22 22:20:49,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:20:49,910 INFO L225 Difference]: With dead ends: 258 [2020-08-22 22:20:49,910 INFO L226 Difference]: Without dead ends: 212 [2020-08-22 22:20:49,912 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=220, Invalid=1262, Unknown=0, NotChecked=0, Total=1482 [2020-08-22 22:20:49,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-08-22 22:20:49,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 201. [2020-08-22 22:20:49,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-08-22 22:20:49,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 208 transitions. [2020-08-22 22:20:49,940 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 208 transitions. Word has length 78 [2020-08-22 22:20:49,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:20:49,940 INFO L479 AbstractCegarLoop]: Abstraction has 201 states and 208 transitions. [2020-08-22 22:20:49,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-22 22:20:49,940 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 208 transitions. [2020-08-22 22:20:49,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-08-22 22:20:49,941 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:20:49,941 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:20:49,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 22:20:49,942 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:20:49,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:20:49,942 INFO L82 PathProgramCache]: Analyzing trace with hash 289772928, now seen corresponding path program 1 times [2020-08-22 22:20:49,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:20:49,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [625458173] [2020-08-22 22:20:49,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:20:49,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:20:50,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:20:50,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:20:50,917 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:20:50,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [625458173] [2020-08-22 22:20:50,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:20:50,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-22 22:20:50,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948309474] [2020-08-22 22:20:50,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-22 22:20:50,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:20:50,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-22 22:20:50,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2020-08-22 22:20:50,921 INFO L87 Difference]: Start difference. First operand 201 states and 208 transitions. Second operand 27 states. [2020-08-22 22:20:53,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:20:53,903 INFO L93 Difference]: Finished difference Result 228 states and 236 transitions. [2020-08-22 22:20:53,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-08-22 22:20:53,904 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 80 [2020-08-22 22:20:53,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:20:53,906 INFO L225 Difference]: With dead ends: 228 [2020-08-22 22:20:53,906 INFO L226 Difference]: Without dead ends: 226 [2020-08-22 22:20:53,907 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=643, Invalid=2219, Unknown=0, NotChecked=0, Total=2862 [2020-08-22 22:20:53,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-08-22 22:20:53,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 201. [2020-08-22 22:20:53,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-08-22 22:20:53,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 208 transitions. [2020-08-22 22:20:53,938 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 208 transitions. Word has length 80 [2020-08-22 22:20:53,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:20:53,938 INFO L479 AbstractCegarLoop]: Abstraction has 201 states and 208 transitions. [2020-08-22 22:20:53,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-22 22:20:53,939 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 208 transitions. [2020-08-22 22:20:53,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-08-22 22:20:53,940 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:20:53,940 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:20:53,940 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 22:20:53,940 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:20:53,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:20:53,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1069144387, now seen corresponding path program 2 times [2020-08-22 22:20:53,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:20:53,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1811728697] [2020-08-22 22:20:53,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:20:53,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:20:54,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:20:54,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:20:54,958 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:20:54,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1811728697] [2020-08-22 22:20:54,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:20:54,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-22 22:20:54,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149095260] [2020-08-22 22:20:54,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-22 22:20:54,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:20:54,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-22 22:20:54,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2020-08-22 22:20:54,961 INFO L87 Difference]: Start difference. First operand 201 states and 208 transitions. Second operand 24 states. [2020-08-22 22:20:57,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:20:57,440 INFO L93 Difference]: Finished difference Result 281 states and 291 transitions. [2020-08-22 22:20:57,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-22 22:20:57,440 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 81 [2020-08-22 22:20:57,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:20:57,442 INFO L225 Difference]: With dead ends: 281 [2020-08-22 22:20:57,442 INFO L226 Difference]: Without dead ends: 278 [2020-08-22 22:20:57,443 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=412, Invalid=1750, Unknown=0, NotChecked=0, Total=2162 [2020-08-22 22:20:57,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-08-22 22:20:57,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 227. [2020-08-22 22:20:57,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-08-22 22:20:57,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 236 transitions. [2020-08-22 22:20:57,496 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 236 transitions. Word has length 81 [2020-08-22 22:20:57,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:20:57,497 INFO L479 AbstractCegarLoop]: Abstraction has 227 states and 236 transitions. [2020-08-22 22:20:57,497 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-22 22:20:57,497 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 236 transitions. [2020-08-22 22:20:57,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-08-22 22:20:57,498 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:20:57,499 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:20:57,499 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 22:20:57,499 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:20:57,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:20:57,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1841803199, now seen corresponding path program 1 times [2020-08-22 22:20:57,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:20:57,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1554613683] [2020-08-22 22:20:57,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:20:57,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:20:58,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:20:58,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:20:58,902 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:20:58,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1554613683] [2020-08-22 22:20:58,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:20:58,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-08-22 22:20:58,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655933707] [2020-08-22 22:20:58,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-22 22:20:58,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:20:58,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-22 22:20:58,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2020-08-22 22:20:58,905 INFO L87 Difference]: Start difference. First operand 227 states and 236 transitions. Second operand 29 states. [2020-08-22 22:21:00,144 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2020-08-22 22:21:00,886 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2020-08-22 22:21:01,115 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 59 [2020-08-22 22:21:01,278 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-08-22 22:21:01,643 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2020-08-22 22:21:01,997 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2020-08-22 22:21:02,246 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 61 [2020-08-22 22:21:03,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:21:03,796 INFO L93 Difference]: Finished difference Result 299 states and 310 transitions. [2020-08-22 22:21:03,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-08-22 22:21:03,797 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 81 [2020-08-22 22:21:03,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:21:03,799 INFO L225 Difference]: With dead ends: 299 [2020-08-22 22:21:03,799 INFO L226 Difference]: Without dead ends: 297 [2020-08-22 22:21:03,800 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=621, Invalid=3669, Unknown=0, NotChecked=0, Total=4290 [2020-08-22 22:21:03,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-08-22 22:21:03,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 251. [2020-08-22 22:21:03,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2020-08-22 22:21:03,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 261 transitions. [2020-08-22 22:21:03,835 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 261 transitions. Word has length 81 [2020-08-22 22:21:03,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:21:03,836 INFO L479 AbstractCegarLoop]: Abstraction has 251 states and 261 transitions. [2020-08-22 22:21:03,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-22 22:21:03,836 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 261 transitions. [2020-08-22 22:21:03,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-22 22:21:03,837 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:21:03,837 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:21:03,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 22:21:03,838 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:21:03,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:21:03,838 INFO L82 PathProgramCache]: Analyzing trace with hash 682951368, now seen corresponding path program 1 times [2020-08-22 22:21:03,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:21:03,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1320584269] [2020-08-22 22:21:03,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:21:03,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 22:21:03,872 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 22:21:03,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 22:21:03,902 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 22:21:03,947 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 22:21:03,947 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 22:21:03,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 22:21:04,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 10:21:04 BoogieIcfgContainer [2020-08-22 22:21:04,022 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 22:21:04,025 INFO L168 Benchmark]: Toolchain (without parser) took 33805.87 ms. Allocated memory was 145.2 MB in the beginning and 482.3 MB in the end (delta: 337.1 MB). Free memory was 101.2 MB in the beginning and 188.8 MB in the end (delta: -87.6 MB). Peak memory consumption was 249.5 MB. Max. memory is 7.1 GB. [2020-08-22 22:21:04,026 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 145.2 MB. Free memory was 120.8 MB in the beginning and 120.4 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. [2020-08-22 22:21:04,026 INFO L168 Benchmark]: CACSL2BoogieTranslator took 708.49 ms. Allocated memory was 145.2 MB in the beginning and 203.9 MB in the end (delta: 58.7 MB). Free memory was 100.8 MB in the beginning and 171.0 MB in the end (delta: -70.3 MB). Peak memory consumption was 23.1 MB. Max. memory is 7.1 GB. [2020-08-22 22:21:04,027 INFO L168 Benchmark]: Boogie Preprocessor took 85.90 ms. Allocated memory is still 203.9 MB. Free memory was 171.0 MB in the beginning and 168.0 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 7.1 GB. [2020-08-22 22:21:04,028 INFO L168 Benchmark]: RCFGBuilder took 909.26 ms. Allocated memory is still 203.9 MB. Free memory was 168.0 MB in the beginning and 110.6 MB in the end (delta: 57.4 MB). Peak memory consumption was 57.4 MB. Max. memory is 7.1 GB. [2020-08-22 22:21:04,029 INFO L168 Benchmark]: TraceAbstraction took 32093.18 ms. Allocated memory was 203.9 MB in the beginning and 482.3 MB in the end (delta: 278.4 MB). Free memory was 110.6 MB in the beginning and 188.8 MB in the end (delta: -78.2 MB). Peak memory consumption was 200.2 MB. Max. memory is 7.1 GB. [2020-08-22 22:21:04,032 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 145.2 MB. Free memory was 120.8 MB in the beginning and 120.4 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 708.49 ms. Allocated memory was 145.2 MB in the beginning and 203.9 MB in the end (delta: 58.7 MB). Free memory was 100.8 MB in the beginning and 171.0 MB in the end (delta: -70.3 MB). Peak memory consumption was 23.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 85.90 ms. Allocated memory is still 203.9 MB. Free memory was 171.0 MB in the beginning and 168.0 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 909.26 ms. Allocated memory is still 203.9 MB. Free memory was 168.0 MB in the beginning and 110.6 MB in the end (delta: 57.4 MB). Peak memory consumption was 57.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 32093.18 ms. Allocated memory was 203.9 MB in the beginning and 482.3 MB in the end (delta: 278.4 MB). Free memory was 110.6 MB in the beginning and 188.8 MB in the end (delta: -78.2 MB). Peak memory consumption was 200.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1038]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L987] struct TSLL* null = malloc(sizeof(struct TSLL)); VAL [malloc(sizeof(struct TSLL))={-1:0}, null={-1:0}] [L988] null->next = ((void*)0) VAL [malloc(sizeof(struct TSLL))={-1:0}, null={-1:0}] [L989] null->prev = ((void*)0) VAL [malloc(sizeof(struct TSLL))={-1:0}, null={-1:0}] [L990] null->colour = BLACK VAL [malloc(sizeof(struct TSLL))={-1:0}, null={-1:0}] [L992] struct TSLL* list = malloc(sizeof(struct TSLL)); VAL [list={-2:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-2:0}, null={-1:0}] [L993] list->next = null VAL [list={-2:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-2:0}, null={-1:0}] [L994] list->prev = null VAL [list={-2:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-2:0}, null={-1:0}] [L995] list->colour = BLACK VAL [list={-2:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-2:0}, null={-1:0}] [L997] struct TSLL* end = list; VAL [end={-2:0}, list={-2:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-2:0}, null={-1:0}] [L1000] COND TRUE __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=1, end={-2:0}, list={-2:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-2:0}, null={-1:0}] [L1003] end->next = malloc(sizeof(struct TSLL)) VAL [end={-2:0}, list={-2:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-3:0}, null={-1:0}] [L1004] EXPR end->next VAL [end={-2:0}, end->next={-3:0}, list={-2:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-3:0}, null={-1:0}] [L1004] end->next->prev = end VAL [end={-2:0}, end->next={-3:0}, list={-2:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-3:0}, null={-1:0}] [L1005] EXPR end->next VAL [end={-2:0}, end->next={-3:0}, list={-2:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-3:0}, null={-1:0}] [L1005] end = end->next VAL [end={-3:0}, end->next={-3:0}, list={-2:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-3:0}, null={-1:0}] [L1006] end->next = null VAL [end={-3:0}, list={-2:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-3:0}, null={-1:0}] [L1008] COND FALSE !(__VERIFIER_nondet_int()) VAL [__VERIFIER_nondet_int()=0, end={-3:0}, list={-2:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-3:0}, null={-1:0}] [L1014] end->colour = RED VAL [end={-3:0}, list={-2:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-3:0}, null={-1:0}] [L1015] end->next = malloc(sizeof(struct TSLL)) VAL [end={-3:0}, list={-2:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-3:0}, malloc(sizeof(struct TSLL))={-4:0}, null={-1:0}] [L1016] EXPR end->next VAL [end={-3:0}, end->next={-4:0}, list={-2:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-3:0}, malloc(sizeof(struct TSLL))={-4:0}, null={-1:0}] [L1016] end->next->prev = end VAL [end={-3:0}, end->next={-4:0}, list={-2:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-3:0}, malloc(sizeof(struct TSLL))={-4:0}, null={-1:0}] [L1017] EXPR end->next VAL [end={-3:0}, end->next={-4:0}, list={-2:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-3:0}, malloc(sizeof(struct TSLL))={-4:0}, null={-1:0}] [L1017] end = end->next VAL [end={-4:0}, end->next={-4:0}, list={-2:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-3:0}, malloc(sizeof(struct TSLL))={-4:0}, null={-1:0}] [L1018] end->next = null VAL [end={-4:0}, list={-2:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-3:0}, malloc(sizeof(struct TSLL))={-4:0}, null={-1:0}] [L1019] end->colour = BLACK VAL [end={-4:0}, list={-2:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-3:0}, malloc(sizeof(struct TSLL))={-4:0}, null={-1:0}] [L1021] EXPR end->colour VAL [end={-4:0}, end->colour=1, list={-2:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-3:0}, malloc(sizeof(struct TSLL))={-4:0}, null={-1:0}] [L1021] COND FALSE !(!(BLACK == end->colour)) VAL [end={-4:0}, end->colour=1, list={-2:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-3:0}, malloc(sizeof(struct TSLL))={-4:0}, null={-1:0}] [L1022] EXPR end->next VAL [end={-4:0}, end->next={-1:0}, list={-2:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-3:0}, malloc(sizeof(struct TSLL))={-4:0}, null={-1:0}] [L1022] COND FALSE !(!(null == end->next)) VAL [end={-4:0}, end->next={-1:0}, list={-2:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-3:0}, malloc(sizeof(struct TSLL))={-4:0}, null={-1:0}] [L1023] COND FALSE !(!(null != end)) VAL [end={-4:0}, list={-2:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-3:0}, malloc(sizeof(struct TSLL))={-4:0}, null={-1:0}] [L1000] COND FALSE !(__VERIFIER_nondet_int()) VAL [__VERIFIER_nondet_int()=0, end={-4:0}, list={-2:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-3:0}, malloc(sizeof(struct TSLL))={-4:0}, null={-1:0}] [L1026] end = null VAL [end={-1:0}, list={-2:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-3:0}, malloc(sizeof(struct TSLL))={-4:0}, null={-1:0}] [L1027] end = list VAL [end={-2:0}, list={-2:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-3:0}, malloc(sizeof(struct TSLL))={-4:0}, null={-1:0}] [L1030] COND FALSE !(!(null != end)) VAL [end={-2:0}, list={-2:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-3:0}, malloc(sizeof(struct TSLL))={-4:0}, null={-1:0}] [L1031] EXPR end->colour VAL [end={-2:0}, end->colour=1, list={-2:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-3:0}, malloc(sizeof(struct TSLL))={-4:0}, null={-1:0}] [L1031] COND FALSE !(!(BLACK == end->colour)) VAL [end={-2:0}, end->colour=1, list={-2:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-3:0}, malloc(sizeof(struct TSLL))={-4:0}, null={-1:0}] [L1032] COND TRUE null != end VAL [end={-2:0}, list={-2:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-3:0}, malloc(sizeof(struct TSLL))={-4:0}, null={-1:0}] [L1034] EXPR end->colour VAL [end={-2:0}, end->colour=1, list={-2:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-3:0}, malloc(sizeof(struct TSLL))={-4:0}, null={-1:0}] [L1034] COND FALSE !(RED == end->colour) VAL [end={-2:0}, end->colour=1, list={-2:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-3:0}, malloc(sizeof(struct TSLL))={-4:0}, null={-1:0}] [L1041] EXPR end->next VAL [end={-2:0}, end->next={-3:0}, list={-2:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-3:0}, malloc(sizeof(struct TSLL))={-4:0}, null={-1:0}] [L1041] end = end->next VAL [end={-3:0}, end->next={-3:0}, list={-2:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-3:0}, malloc(sizeof(struct TSLL))={-4:0}, null={-1:0}] [L1032] COND TRUE null != end VAL [end={-3:0}, list={-2:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-3:0}, malloc(sizeof(struct TSLL))={-4:0}, null={-1:0}] [L1034] EXPR end->colour VAL [end={-3:0}, end->colour=0, list={-2:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-3:0}, malloc(sizeof(struct TSLL))={-4:0}, null={-1:0}] [L1034] COND TRUE RED == end->colour VAL [end={-3:0}, end->colour=0, list={-2:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-3:0}, malloc(sizeof(struct TSLL))={-4:0}, null={-1:0}] [L1036] EXPR end->next VAL [end={-3:0}, end->next={-4:0}, list={-2:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-3:0}, malloc(sizeof(struct TSLL))={-4:0}, null={-1:0}] [L1036] end = end->next VAL [end={-4:0}, end->next={-4:0}, list={-2:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-3:0}, malloc(sizeof(struct TSLL))={-4:0}, null={-1:0}] [L1037] COND FALSE !(!(null != end)) VAL [end={-4:0}, list={-2:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-3:0}, malloc(sizeof(struct TSLL))={-4:0}, null={-1:0}] [L1038] EXPR end->colour VAL [end={-4:0}, end->colour=1, list={-2:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-3:0}, malloc(sizeof(struct TSLL))={-4:0}, null={-1:0}] [L1038] COND TRUE !(BLACK != end->colour) VAL [end={-4:0}, end->colour=1, list={-2:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-3:0}, malloc(sizeof(struct TSLL))={-4:0}, null={-1:0}] [L1038] __VERIFIER_error() VAL [end={-4:0}, list={-2:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-3:0}, malloc(sizeof(struct TSLL))={-4:0}, null={-1:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 123 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 31.9s, OverallIterations: 18, TraceHistogramMax: 3, AutomataDifference: 22.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1307 SDtfs, 7538 SDslu, 8093 SDs, 0 SdLazy, 9216 SolverSat, 1261 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 8.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 536 GetRequests, 63 SyntacticMatches, 12 SemanticMatches, 461 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2993 ImplicationChecksByTransitivity, 17.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=251occurred in iteration=17, 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, 17 MinimizatonAttempts, 389 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 7.1s InterpolantComputationTime, 1004 NumberOfCodeBlocks, 1004 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 902 ConstructedInterpolants, 0 QuantifiedInterpolants, 768247 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 17 InterpolantComputations, 8 PerfectInterpolantSequences, 10/110 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...