/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/list-ext3-properties/dll_nullified-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 22:21:11,889 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 22:21:11,892 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 22:21:11,917 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 22:21:11,917 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 22:21:11,918 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 22:21:11,920 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 22:21:11,921 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 22:21:11,923 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 22:21:11,924 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 22:21:11,925 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 22:21:11,926 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 22:21:11,926 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 22:21:11,927 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 22:21:11,928 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 22:21:11,929 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 22:21:11,929 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 22:21:11,930 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 22:21:11,932 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 22:21:11,934 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 22:21:11,935 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 22:21:11,936 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 22:21:11,937 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 22:21:11,938 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 22:21:11,940 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 22:21:11,940 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 22:21:11,941 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 22:21:11,941 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 22:21:11,942 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 22:21:11,943 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 22:21:11,943 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 22:21:11,944 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 22:21:11,944 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 22:21:11,945 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 22:21:11,946 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 22:21:11,946 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 22:21:11,947 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 22:21:11,947 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 22:21:11,947 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 22:21:11,948 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 22:21:11,950 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 22:21:11,950 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 22:21:11,968 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 22:21:11,972 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 22:21:11,973 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 22:21:11,973 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 22:21:11,974 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 22:21:11,974 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 22:21:11,974 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 22:21:11,974 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 22:21:11,974 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 22:21:11,974 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 22:21:11,975 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 22:21:11,975 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 22:21:11,975 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 22:21:11,975 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 22:21:11,975 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 22:21:11,977 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 22:21:11,977 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 22:21:11,978 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 22:21:11,978 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 22:21:11,978 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 22:21:11,978 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 22:21:11,978 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 22:21:11,979 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 22:21:12,272 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 22:21:12,282 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 22:21:12,286 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 22:21:12,287 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 22:21:12,288 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 22:21:12,288 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/dll_nullified-1.i [2020-08-22 22:21:12,348 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/581a321b8/c51c58fc22074a7198b34547de627a0c/FLAG4b2f79009 [2020-08-22 22:21:12,819 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 22:21:12,820 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-ext3-properties/dll_nullified-1.i [2020-08-22 22:21:12,847 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/581a321b8/c51c58fc22074a7198b34547de627a0c/FLAG4b2f79009 [2020-08-22 22:21:13,114 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/581a321b8/c51c58fc22074a7198b34547de627a0c [2020-08-22 22:21:13,123 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 22:21:13,125 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 22:21:13,126 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 22:21:13,126 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 22:21:13,130 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 22:21:13,131 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 10:21:13" (1/1) ... [2020-08-22 22:21:13,134 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b9a1b8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:21:13, skipping insertion in model container [2020-08-22 22:21:13,134 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 10:21:13" (1/1) ... [2020-08-22 22:21:13,142 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 22:21:13,188 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 22:21:13,724 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 22:21:13,737 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 22:21:13,790 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 22:21:13,848 INFO L208 MainTranslator]: Completed translation [2020-08-22 22:21:13,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:21:13 WrapperNode [2020-08-22 22:21:13,849 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 22:21:13,850 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 22:21:13,850 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 22:21:13,850 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 22:21:13,864 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:21:13" (1/1) ... [2020-08-22 22:21:13,864 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:21:13" (1/1) ... [2020-08-22 22:21:13,890 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:21:13" (1/1) ... [2020-08-22 22:21:13,892 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:21:13" (1/1) ... [2020-08-22 22:21:13,929 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:21:13" (1/1) ... [2020-08-22 22:21:13,939 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:21:13" (1/1) ... [2020-08-22 22:21:13,944 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:21:13" (1/1) ... [2020-08-22 22:21:13,950 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 22:21:13,951 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 22:21:13,951 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 22:21:13,951 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 22:21:13,952 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:21:13" (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 22:21:14,024 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 22:21:14,025 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 22:21:14,025 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-08-22 22:21:14,025 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-08-22 22:21:14,025 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-08-22 22:21:14,025 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create [2020-08-22 22:21:14,025 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 22:21:14,026 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 22:21:14,026 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 22:21:14,026 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-08-22 22:21:14,026 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-08-22 22:21:14,026 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-08-22 22:21:14,027 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-08-22 22:21:14,027 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-08-22 22:21:14,027 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-08-22 22:21:14,027 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-08-22 22:21:14,027 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-08-22 22:21:14,027 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-08-22 22:21:14,028 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-08-22 22:21:14,028 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-08-22 22:21:14,028 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-08-22 22:21:14,028 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-08-22 22:21:14,028 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-08-22 22:21:14,029 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-08-22 22:21:14,029 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-08-22 22:21:14,029 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-08-22 22:21:14,029 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-08-22 22:21:14,029 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-08-22 22:21:14,029 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-08-22 22:21:14,030 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-08-22 22:21:14,030 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-08-22 22:21:14,030 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-08-22 22:21:14,030 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-08-22 22:21:14,030 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-08-22 22:21:14,030 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-08-22 22:21:14,031 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-08-22 22:21:14,031 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-08-22 22:21:14,031 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-08-22 22:21:14,031 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-08-22 22:21:14,031 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-08-22 22:21:14,031 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-08-22 22:21:14,032 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-08-22 22:21:14,032 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-08-22 22:21:14,032 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-08-22 22:21:14,032 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-08-22 22:21:14,032 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-08-22 22:21:14,032 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-08-22 22:21:14,032 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-08-22 22:21:14,033 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-08-22 22:21:14,033 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-08-22 22:21:14,033 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-08-22 22:21:14,033 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-08-22 22:21:14,033 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-08-22 22:21:14,034 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-08-22 22:21:14,034 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-08-22 22:21:14,034 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-08-22 22:21:14,034 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-08-22 22:21:14,034 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-08-22 22:21:14,034 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-08-22 22:21:14,034 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-08-22 22:21:14,035 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-08-22 22:21:14,035 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-22 22:21:14,035 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-22 22:21:14,035 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-22 22:21:14,035 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-22 22:21:14,035 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-08-22 22:21:14,036 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-08-22 22:21:14,036 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-22 22:21:14,036 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-08-22 22:21:14,036 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-08-22 22:21:14,036 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 22:21:14,036 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-08-22 22:21:14,037 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-08-22 22:21:14,037 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-08-22 22:21:14,037 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-22 22:21:14,037 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-08-22 22:21:14,037 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-08-22 22:21:14,037 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-08-22 22:21:14,037 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-08-22 22:21:14,038 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-08-22 22:21:14,038 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-08-22 22:21:14,038 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-08-22 22:21:14,038 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-08-22 22:21:14,038 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-08-22 22:21:14,038 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-08-22 22:21:14,039 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-08-22 22:21:14,039 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-08-22 22:21:14,039 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-08-22 22:21:14,039 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-08-22 22:21:14,039 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-08-22 22:21:14,039 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-08-22 22:21:14,040 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-08-22 22:21:14,040 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-08-22 22:21:14,040 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-08-22 22:21:14,040 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-08-22 22:21:14,040 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-08-22 22:21:14,040 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-08-22 22:21:14,040 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-08-22 22:21:14,041 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-08-22 22:21:14,041 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-08-22 22:21:14,041 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-08-22 22:21:14,041 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-08-22 22:21:14,041 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-08-22 22:21:14,041 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-08-22 22:21:14,041 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-08-22 22:21:14,042 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-08-22 22:21:14,042 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-08-22 22:21:14,042 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-08-22 22:21:14,042 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-08-22 22:21:14,042 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-08-22 22:21:14,042 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-08-22 22:21:14,043 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-08-22 22:21:14,043 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-08-22 22:21:14,043 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-08-22 22:21:14,043 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-08-22 22:21:14,043 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create [2020-08-22 22:21:14,043 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-22 22:21:14,043 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 22:21:14,043 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-22 22:21:14,044 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 22:21:14,044 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-22 22:21:14,044 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 22:21:14,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 22:21:14,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 22:21:14,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 22:21:14,473 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-08-22 22:21:14,678 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 22:21:14,678 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-08-22 22:21:14,683 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 10:21:14 BoogieIcfgContainer [2020-08-22 22:21:14,683 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 22:21:14,684 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 22:21:14,684 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 22:21:14,688 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 22:21:14,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 10:21:13" (1/3) ... [2020-08-22 22:21:14,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c88703f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 10:21:14, skipping insertion in model container [2020-08-22 22:21:14,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:21:13" (2/3) ... [2020-08-22 22:21:14,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c88703f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 10:21:14, skipping insertion in model container [2020-08-22 22:21:14,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 10:21:14" (3/3) ... [2020-08-22 22:21:14,692 INFO L109 eAbstractionObserver]: Analyzing ICFG dll_nullified-1.i [2020-08-22 22:21:14,704 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 22:21:14,712 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 22:21:14,726 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 22:21:14,748 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 22:21:14,749 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 22:21:14,749 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 22:21:14,750 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 22:21:14,750 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 22:21:14,750 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 22:21:14,750 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 22:21:14,751 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 22:21:14,766 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states. [2020-08-22 22:21:14,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-22 22:21:14,776 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:21:14,777 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] [2020-08-22 22:21:14,777 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:21:14,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:21:14,784 INFO L82 PathProgramCache]: Analyzing trace with hash 136898680, now seen corresponding path program 1 times [2020-08-22 22:21:14,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:21:14,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2108500844] [2020-08-22 22:21:14,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:21:14,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:14,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:21:14,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:15,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-22 22:21:15,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:15,027 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 22:21:15,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2108500844] [2020-08-22 22:21:15,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:21:15,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 22:21:15,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097679294] [2020-08-22 22:21:15,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 22:21:15,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:21:15,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 22:21:15,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 22:21:15,056 INFO L87 Difference]: Start difference. First operand 101 states. Second operand 4 states. [2020-08-22 22:21:15,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:21:15,466 INFO L93 Difference]: Finished difference Result 230 states and 265 transitions. [2020-08-22 22:21:15,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 22:21:15,468 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-08-22 22:21:15,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:21:15,480 INFO L225 Difference]: With dead ends: 230 [2020-08-22 22:21:15,481 INFO L226 Difference]: Without dead ends: 153 [2020-08-22 22:21:15,485 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 22:21:15,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-08-22 22:21:15,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 92. [2020-08-22 22:21:15,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-08-22 22:21:15,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 101 transitions. [2020-08-22 22:21:15,538 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 101 transitions. Word has length 32 [2020-08-22 22:21:15,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:21:15,538 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 101 transitions. [2020-08-22 22:21:15,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 22:21:15,539 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 101 transitions. [2020-08-22 22:21:15,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-22 22:21:15,541 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:21:15,541 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] [2020-08-22 22:21:15,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 22:21:15,541 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:21:15,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:21:15,542 INFO L82 PathProgramCache]: Analyzing trace with hash 272796752, now seen corresponding path program 1 times [2020-08-22 22:21:15,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:21:15,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1198567506] [2020-08-22 22:21:15,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:21:15,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:15,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:21:15,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:15,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-22 22:21:15,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:15,693 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 22:21:15,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1198567506] [2020-08-22 22:21:15,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:21:15,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 22:21:15,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951971382] [2020-08-22 22:21:15,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 22:21:15,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:21:15,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 22:21:15,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-22 22:21:15,698 INFO L87 Difference]: Start difference. First operand 92 states and 101 transitions. Second operand 7 states. [2020-08-22 22:21:16,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:21:16,012 INFO L93 Difference]: Finished difference Result 172 states and 190 transitions. [2020-08-22 22:21:16,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 22:21:16,012 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2020-08-22 22:21:16,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:21:16,015 INFO L225 Difference]: With dead ends: 172 [2020-08-22 22:21:16,015 INFO L226 Difference]: Without dead ends: 112 [2020-08-22 22:21:16,016 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-08-22 22:21:16,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-08-22 22:21:16,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 93. [2020-08-22 22:21:16,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-08-22 22:21:16,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 102 transitions. [2020-08-22 22:21:16,047 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 102 transitions. Word has length 32 [2020-08-22 22:21:16,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:21:16,047 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 102 transitions. [2020-08-22 22:21:16,047 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 22:21:16,048 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 102 transitions. [2020-08-22 22:21:16,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-22 22:21:16,053 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:21:16,053 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:21:16,053 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 22:21:16,054 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:21:16,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:21:16,054 INFO L82 PathProgramCache]: Analyzing trace with hash -54471897, now seen corresponding path program 1 times [2020-08-22 22:21:16,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:21:16,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1960998374] [2020-08-22 22:21:16,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:21:16,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:16,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:21:16,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:16,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-22 22:21:16,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:16,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:21:16,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1960998374] [2020-08-22 22:21:16,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:21:16,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 22:21:16,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049588294] [2020-08-22 22:21:16,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 22:21:16,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:21:16,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 22:21:16,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-08-22 22:21:16,337 INFO L87 Difference]: Start difference. First operand 93 states and 102 transitions. Second operand 9 states. [2020-08-22 22:21:16,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:21:16,786 INFO L93 Difference]: Finished difference Result 193 states and 213 transitions. [2020-08-22 22:21:16,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 22:21:16,786 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 51 [2020-08-22 22:21:16,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:21:16,789 INFO L225 Difference]: With dead ends: 193 [2020-08-22 22:21:16,789 INFO L226 Difference]: Without dead ends: 133 [2020-08-22 22:21:16,790 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-08-22 22:21:16,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-08-22 22:21:16,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 114. [2020-08-22 22:21:16,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-08-22 22:21:16,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 125 transitions. [2020-08-22 22:21:16,805 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 125 transitions. Word has length 51 [2020-08-22 22:21:16,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:21:16,805 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 125 transitions. [2020-08-22 22:21:16,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 22:21:16,805 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 125 transitions. [2020-08-22 22:21:16,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-08-22 22:21:16,807 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:21:16,808 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-22 22:21:16,808 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 22:21:16,808 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:21:16,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:21:16,809 INFO L82 PathProgramCache]: Analyzing trace with hash -586426640, now seen corresponding path program 2 times [2020-08-22 22:21:16,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:21:16,809 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [289805061] [2020-08-22 22:21:16,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:21:16,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:16,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:21:16,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:16,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-22 22:21:16,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:16,963 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:21:16,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [289805061] [2020-08-22 22:21:16,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:21:16,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 22:21:16,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81879765] [2020-08-22 22:21:16,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 22:21:16,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:21:16,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 22:21:16,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-22 22:21:16,965 INFO L87 Difference]: Start difference. First operand 114 states and 125 transitions. Second operand 7 states. [2020-08-22 22:21:17,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:21:17,224 INFO L93 Difference]: Finished difference Result 195 states and 215 transitions. [2020-08-22 22:21:17,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 22:21:17,225 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 70 [2020-08-22 22:21:17,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:21:17,226 INFO L225 Difference]: With dead ends: 195 [2020-08-22 22:21:17,227 INFO L226 Difference]: Without dead ends: 114 [2020-08-22 22:21:17,230 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-08-22 22:21:17,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-08-22 22:21:17,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2020-08-22 22:21:17,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-08-22 22:21:17,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 124 transitions. [2020-08-22 22:21:17,248 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 124 transitions. Word has length 70 [2020-08-22 22:21:17,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:21:17,249 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 124 transitions. [2020-08-22 22:21:17,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 22:21:17,249 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 124 transitions. [2020-08-22 22:21:17,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-08-22 22:21:17,251 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:21:17,251 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-22 22:21:17,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 22:21:17,252 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:21:17,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:21:17,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1356086606, now seen corresponding path program 1 times [2020-08-22 22:21:17,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:21:17,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [973044395] [2020-08-22 22:21:17,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:21:17,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:17,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:21:17,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:17,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-22 22:21:17,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:17,559 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:21:17,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [973044395] [2020-08-22 22:21:17,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:21:17,561 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 22:21:17,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990798925] [2020-08-22 22:21:17,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 22:21:17,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:21:17,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 22:21:17,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-08-22 22:21:17,564 INFO L87 Difference]: Start difference. First operand 114 states and 124 transitions. Second operand 11 states. [2020-08-22 22:21:17,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:21:17,933 INFO L93 Difference]: Finished difference Result 214 states and 233 transitions. [2020-08-22 22:21:17,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 22:21:17,933 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 71 [2020-08-22 22:21:17,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:21:17,935 INFO L225 Difference]: With dead ends: 214 [2020-08-22 22:21:17,935 INFO L226 Difference]: Without dead ends: 154 [2020-08-22 22:21:17,938 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2020-08-22 22:21:17,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-08-22 22:21:17,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 135. [2020-08-22 22:21:17,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-08-22 22:21:17,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 146 transitions. [2020-08-22 22:21:17,955 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 146 transitions. Word has length 71 [2020-08-22 22:21:17,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:21:17,955 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 146 transitions. [2020-08-22 22:21:17,955 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 22:21:17,955 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 146 transitions. [2020-08-22 22:21:17,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-22 22:21:17,957 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:21:17,957 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-08-22 22:21:17,958 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 22:21:17,958 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:21:17,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:21:17,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1395228995, now seen corresponding path program 2 times [2020-08-22 22:21:17,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:21:17,959 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2079383916] [2020-08-22 22:21:17,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:21:18,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:18,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:21:18,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:18,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-22 22:21:18,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:18,286 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:21:18,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2079383916] [2020-08-22 22:21:18,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:21:18,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 22:21:18,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160636382] [2020-08-22 22:21:18,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 22:21:18,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:21:18,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 22:21:18,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-08-22 22:21:18,291 INFO L87 Difference]: Start difference. First operand 135 states and 146 transitions. Second operand 13 states. [2020-08-22 22:21:18,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:21:18,672 INFO L93 Difference]: Finished difference Result 235 states and 255 transitions. [2020-08-22 22:21:18,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 22:21:18,672 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 91 [2020-08-22 22:21:18,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:21:18,674 INFO L225 Difference]: With dead ends: 235 [2020-08-22 22:21:18,674 INFO L226 Difference]: Without dead ends: 175 [2020-08-22 22:21:18,679 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-08-22 22:21:18,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-08-22 22:21:18,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 156. [2020-08-22 22:21:18,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-08-22 22:21:18,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 168 transitions. [2020-08-22 22:21:18,704 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 168 transitions. Word has length 91 [2020-08-22 22:21:18,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:21:18,705 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 168 transitions. [2020-08-22 22:21:18,707 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 22:21:18,708 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 168 transitions. [2020-08-22 22:21:18,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-08-22 22:21:18,712 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:21:18,713 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:21:18,713 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 22:21:18,720 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:21:18,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:21:18,721 INFO L82 PathProgramCache]: Analyzing trace with hash 274581320, now seen corresponding path program 3 times [2020-08-22 22:21:18,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:21:18,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [320436458] [2020-08-22 22:21:18,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:21:18,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:18,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:21:18,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:18,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-22 22:21:18,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:19,127 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:21:19,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [320436458] [2020-08-22 22:21:19,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:21:19,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-22 22:21:19,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146421727] [2020-08-22 22:21:19,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 22:21:19,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:21:19,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 22:21:19,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-08-22 22:21:19,132 INFO L87 Difference]: Start difference. First operand 156 states and 168 transitions. Second operand 15 states. [2020-08-22 22:21:19,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:21:19,588 INFO L93 Difference]: Finished difference Result 256 states and 277 transitions. [2020-08-22 22:21:19,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 22:21:19,588 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 111 [2020-08-22 22:21:19,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:21:19,591 INFO L225 Difference]: With dead ends: 256 [2020-08-22 22:21:19,591 INFO L226 Difference]: Without dead ends: 196 [2020-08-22 22:21:19,594 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2020-08-22 22:21:19,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-08-22 22:21:19,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 177. [2020-08-22 22:21:19,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-08-22 22:21:19,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 190 transitions. [2020-08-22 22:21:19,617 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 190 transitions. Word has length 111 [2020-08-22 22:21:19,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:21:19,619 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 190 transitions. [2020-08-22 22:21:19,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 22:21:19,619 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 190 transitions. [2020-08-22 22:21:19,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-08-22 22:21:19,622 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:21:19,622 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:21:19,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 22:21:19,623 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:21:19,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:21:19,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1182686291, now seen corresponding path program 4 times [2020-08-22 22:21:19,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:21:19,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1940832430] [2020-08-22 22:21:19,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:21:19,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:19,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:21:19,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:19,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-22 22:21:19,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:20,211 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 118 proven. 19 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-08-22 22:21:20,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1940832430] [2020-08-22 22:21:20,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:21:20,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-22 22:21:20,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483179164] [2020-08-22 22:21:20,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 22:21:20,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:21:20,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 22:21:20,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-08-22 22:21:20,214 INFO L87 Difference]: Start difference. First operand 177 states and 190 transitions. Second operand 17 states. [2020-08-22 22:21:21,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:21:21,066 INFO L93 Difference]: Finished difference Result 308 states and 334 transitions. [2020-08-22 22:21:21,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 22:21:21,066 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 131 [2020-08-22 22:21:21,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:21:21,068 INFO L225 Difference]: With dead ends: 308 [2020-08-22 22:21:21,068 INFO L226 Difference]: Without dead ends: 253 [2020-08-22 22:21:21,069 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=165, Invalid=827, Unknown=0, NotChecked=0, Total=992 [2020-08-22 22:21:21,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-08-22 22:21:21,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 183. [2020-08-22 22:21:21,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-08-22 22:21:21,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 197 transitions. [2020-08-22 22:21:21,098 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 197 transitions. Word has length 131 [2020-08-22 22:21:21,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:21:21,098 INFO L479 AbstractCegarLoop]: Abstraction has 183 states and 197 transitions. [2020-08-22 22:21:21,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 22:21:21,099 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 197 transitions. [2020-08-22 22:21:21,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-08-22 22:21:21,100 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:21:21,100 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:21:21,100 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 22:21:21,101 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:21:21,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:21:21,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1200683152, now seen corresponding path program 1 times [2020-08-22 22:21:21,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:21:21,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1859510108] [2020-08-22 22:21:21,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:21:21,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:21,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:21:21,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:21,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-22 22:21:21,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:21,775 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 118 proven. 19 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-08-22 22:21:21,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1859510108] [2020-08-22 22:21:21,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:21:21,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-22 22:21:21,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556312078] [2020-08-22 22:21:21,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 22:21:21,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:21:21,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 22:21:21,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2020-08-22 22:21:21,779 INFO L87 Difference]: Start difference. First operand 183 states and 197 transitions. Second operand 18 states. [2020-08-22 22:21:22,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:21:22,984 INFO L93 Difference]: Finished difference Result 286 states and 310 transitions. [2020-08-22 22:21:22,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-22 22:21:22,986 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 133 [2020-08-22 22:21:22,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:21:22,988 INFO L225 Difference]: With dead ends: 286 [2020-08-22 22:21:22,988 INFO L226 Difference]: Without dead ends: 231 [2020-08-22 22:21:22,990 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=177, Invalid=1013, Unknown=0, NotChecked=0, Total=1190 [2020-08-22 22:21:22,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-08-22 22:21:23,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 187. [2020-08-22 22:21:23,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-08-22 22:21:23,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 201 transitions. [2020-08-22 22:21:23,021 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 201 transitions. Word has length 133 [2020-08-22 22:21:23,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:21:23,021 INFO L479 AbstractCegarLoop]: Abstraction has 187 states and 201 transitions. [2020-08-22 22:21:23,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 22:21:23,026 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 201 transitions. [2020-08-22 22:21:23,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-22 22:21:23,029 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:21:23,029 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:21:23,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 22:21:23,030 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:21:23,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:21:23,033 INFO L82 PathProgramCache]: Analyzing trace with hash 2062394754, now seen corresponding path program 1 times [2020-08-22 22:21:23,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:21:23,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [831498327] [2020-08-22 22:21:23,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:21:23,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:23,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:21:23,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:23,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-22 22:21:23,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:23,519 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 118 proven. 19 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-08-22 22:21:23,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [831498327] [2020-08-22 22:21:23,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:21:23,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-22 22:21:23,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355317891] [2020-08-22 22:21:23,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 22:21:23,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:21:23,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 22:21:23,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-08-22 22:21:23,522 INFO L87 Difference]: Start difference. First operand 187 states and 201 transitions. Second operand 17 states. [2020-08-22 22:21:24,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:21:24,364 INFO L93 Difference]: Finished difference Result 281 states and 301 transitions. [2020-08-22 22:21:24,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 22:21:24,365 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 135 [2020-08-22 22:21:24,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:21:24,366 INFO L225 Difference]: With dead ends: 281 [2020-08-22 22:21:24,367 INFO L226 Difference]: Without dead ends: 253 [2020-08-22 22:21:24,368 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=165, Invalid=827, Unknown=0, NotChecked=0, Total=992 [2020-08-22 22:21:24,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-08-22 22:21:24,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 195. [2020-08-22 22:21:24,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-08-22 22:21:24,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 209 transitions. [2020-08-22 22:21:24,395 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 209 transitions. Word has length 135 [2020-08-22 22:21:24,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:21:24,396 INFO L479 AbstractCegarLoop]: Abstraction has 195 states and 209 transitions. [2020-08-22 22:21:24,396 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 22:21:24,396 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 209 transitions. [2020-08-22 22:21:24,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-22 22:21:24,397 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:21:24,398 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:21:24,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 22:21:24,398 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:21:24,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:21:24,399 INFO L82 PathProgramCache]: Analyzing trace with hash -414346707, now seen corresponding path program 1 times [2020-08-22 22:21:24,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:21:24,399 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [508068955] [2020-08-22 22:21:24,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:21:24,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 22:21:24,464 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 22:21:24,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 22:21:24,528 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 22:21:24,598 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 22:21:24,598 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 22:21:24,598 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 22:21:24,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 10:21:24 BoogieIcfgContainer [2020-08-22 22:21:24,691 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 22:21:24,694 INFO L168 Benchmark]: Toolchain (without parser) took 11568.53 ms. Allocated memory was 146.3 MB in the beginning and 363.3 MB in the end (delta: 217.1 MB). Free memory was 102.5 MB in the beginning and 212.0 MB in the end (delta: -109.5 MB). Peak memory consumption was 107.6 MB. Max. memory is 7.1 GB. [2020-08-22 22:21:24,694 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 146.3 MB. Free memory was 121.9 MB in the beginning and 121.6 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 22:21:24,695 INFO L168 Benchmark]: CACSL2BoogieTranslator took 723.92 ms. Allocated memory was 146.3 MB in the beginning and 203.4 MB in the end (delta: 57.1 MB). Free memory was 102.1 MB in the beginning and 169.9 MB in the end (delta: -67.8 MB). Peak memory consumption was 22.9 MB. Max. memory is 7.1 GB. [2020-08-22 22:21:24,696 INFO L168 Benchmark]: Boogie Preprocessor took 100.23 ms. Allocated memory is still 203.4 MB. Free memory was 169.9 MB in the beginning and 166.5 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 7.1 GB. [2020-08-22 22:21:24,697 INFO L168 Benchmark]: RCFGBuilder took 732.57 ms. Allocated memory is still 203.4 MB. Free memory was 166.5 MB in the beginning and 116.0 MB in the end (delta: 50.6 MB). Peak memory consumption was 50.6 MB. Max. memory is 7.1 GB. [2020-08-22 22:21:24,697 INFO L168 Benchmark]: TraceAbstraction took 10006.72 ms. Allocated memory was 203.4 MB in the beginning and 363.3 MB in the end (delta: 159.9 MB). Free memory was 115.3 MB in the beginning and 212.0 MB in the end (delta: -96.7 MB). Peak memory consumption was 63.2 MB. Max. memory is 7.1 GB. [2020-08-22 22:21:24,701 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 146.3 MB. Free memory was 121.9 MB in the beginning and 121.6 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 723.92 ms. Allocated memory was 146.3 MB in the beginning and 203.4 MB in the end (delta: 57.1 MB). Free memory was 102.1 MB in the beginning and 169.9 MB in the end (delta: -67.8 MB). Peak memory consumption was 22.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 100.23 ms. Allocated memory is still 203.4 MB. Free memory was 169.9 MB in the beginning and 166.5 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 732.57 ms. Allocated memory is still 203.4 MB. Free memory was 166.5 MB in the beginning and 116.0 MB in the end (delta: 50.6 MB). Peak memory consumption was 50.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 10006.72 ms. Allocated memory was 203.4 MB in the beginning and 363.3 MB in the end (delta: 159.9 MB). Free memory was 115.3 MB in the beginning and 212.0 MB in the end (delta: -96.7 MB). Peak memory consumption was 63.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 605]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L588] const int len = 5; VAL [len=5] [L589] CALL, EXPR dll_create(len) VAL [\old(len)=5] [L568] DLL head = ((void *)0); VAL [\old(len)=5, head={0:0}, len=5] [L569] COND TRUE len > 0 VAL [\old(len)=5, head={0:0}, len=5] [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); VAL [\old(len)=5, head={0:0}, len=5, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L571] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=5, head={0:0}, len=5, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L574] new_head->data_0 = 0 VAL [\old(len)=5, head={0:0}, len=5, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L575] new_head->data_1 = 0 VAL [\old(len)=5, head={0:0}, len=5, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 VAL [\old(len)=5, __VERIFIER_nondet_int()=5, __VERIFIER_nondet_int() == len? 1 : 0=1, head={0:0}, len=5, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 VAL [\old(len)=5, __VERIFIER_nondet_int()=5, __VERIFIER_nondet_int() == len? 1 : 0=1, head={0:0}, len=5, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L577] new_head->next = head VAL [\old(len)=5, head={0:0}, len=5, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L578] new_head->prev = ((void *)0) VAL [\old(len)=5, head={0:0}, len=5, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L579] COND FALSE !(\read(head)) VAL [\old(len)=5, head={0:0}, len=5, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L582] head = new_head VAL [\old(len)=5, head={-1:0}, len=5, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L583] len-- VAL [\old(len)=5, head={-1:0}, len=4, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L569] COND TRUE len > 0 VAL [\old(len)=5, head={-1:0}, len=4, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); VAL [\old(len)=5, head={-1:0}, len=4, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L571] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=5, head={-1:0}, len=4, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L574] new_head->data_0 = 0 VAL [\old(len)=5, head={-1:0}, len=4, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L575] new_head->data_1 = 0 VAL [\old(len)=5, head={-1:0}, len=4, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 VAL [\old(len)=5, __VERIFIER_nondet_int()=4, __VERIFIER_nondet_int() == len? 1 : 0=1, head={-1:0}, len=4, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 VAL [\old(len)=5, __VERIFIER_nondet_int()=4, __VERIFIER_nondet_int() == len? 1 : 0=1, head={-1:0}, len=4, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L577] new_head->next = head VAL [\old(len)=5, head={-1:0}, len=4, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L578] new_head->prev = ((void *)0) VAL [\old(len)=5, head={-1:0}, len=4, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L579] COND TRUE \read(head) VAL [\old(len)=5, head={-1:0}, len=4, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L580] head->prev = new_head VAL [\old(len)=5, head={-1:0}, len=4, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L582] head = new_head VAL [\old(len)=5, head={-2:0}, len=4, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L583] len-- VAL [\old(len)=5, head={-2:0}, len=3, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L569] COND TRUE len > 0 VAL [\old(len)=5, head={-2:0}, len=3, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); VAL [\old(len)=5, head={-2:0}, len=3, malloc(sizeof(struct node))={-3:0}, new_head={-3:0}] [L571] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=5, head={-2:0}, len=3, malloc(sizeof(struct node))={-3:0}, new_head={-3:0}] [L574] new_head->data_0 = 0 VAL [\old(len)=5, head={-2:0}, len=3, malloc(sizeof(struct node))={-3:0}, new_head={-3:0}] [L575] new_head->data_1 = 0 VAL [\old(len)=5, head={-2:0}, len=3, malloc(sizeof(struct node))={-3:0}, new_head={-3:0}] [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 VAL [\old(len)=5, __VERIFIER_nondet_int()=3, __VERIFIER_nondet_int() == len? 1 : 0=1, head={-2:0}, len=3, malloc(sizeof(struct node))={-3:0}, new_head={-3:0}] [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 VAL [\old(len)=5, __VERIFIER_nondet_int()=3, __VERIFIER_nondet_int() == len? 1 : 0=1, head={-2:0}, len=3, malloc(sizeof(struct node))={-3:0}, new_head={-3:0}] [L577] new_head->next = head VAL [\old(len)=5, head={-2:0}, len=3, malloc(sizeof(struct node))={-3:0}, new_head={-3:0}] [L578] new_head->prev = ((void *)0) VAL [\old(len)=5, head={-2:0}, len=3, malloc(sizeof(struct node))={-3:0}, new_head={-3:0}] [L579] COND TRUE \read(head) VAL [\old(len)=5, head={-2:0}, len=3, malloc(sizeof(struct node))={-3:0}, new_head={-3:0}] [L580] head->prev = new_head VAL [\old(len)=5, head={-2:0}, len=3, malloc(sizeof(struct node))={-3:0}, new_head={-3:0}] [L582] head = new_head VAL [\old(len)=5, head={-3:0}, len=3, malloc(sizeof(struct node))={-3:0}, new_head={-3:0}] [L583] len-- VAL [\old(len)=5, head={-3:0}, len=2, malloc(sizeof(struct node))={-3:0}, new_head={-3:0}] [L569] COND TRUE len > 0 VAL [\old(len)=5, head={-3:0}, len=2, malloc(sizeof(struct node))={-3:0}, new_head={-3:0}] [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); VAL [\old(len)=5, head={-3:0}, len=2, malloc(sizeof(struct node))={-4:0}, new_head={-4:0}] [L571] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=5, head={-3:0}, len=2, malloc(sizeof(struct node))={-4:0}, new_head={-4:0}] [L574] new_head->data_0 = 0 VAL [\old(len)=5, head={-3:0}, len=2, malloc(sizeof(struct node))={-4:0}, new_head={-4:0}] [L575] new_head->data_1 = 0 VAL [\old(len)=5, head={-3:0}, len=2, malloc(sizeof(struct node))={-4:0}, new_head={-4:0}] [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 VAL [\old(len)=5, __VERIFIER_nondet_int()=2, __VERIFIER_nondet_int() == len? 1 : 0=1, head={-3:0}, len=2, malloc(sizeof(struct node))={-4:0}, new_head={-4:0}] [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 VAL [\old(len)=5, __VERIFIER_nondet_int()=2, __VERIFIER_nondet_int() == len? 1 : 0=1, head={-3:0}, len=2, malloc(sizeof(struct node))={-4:0}, new_head={-4:0}] [L577] new_head->next = head VAL [\old(len)=5, head={-3:0}, len=2, malloc(sizeof(struct node))={-4:0}, new_head={-4:0}] [L578] new_head->prev = ((void *)0) VAL [\old(len)=5, head={-3:0}, len=2, malloc(sizeof(struct node))={-4:0}, new_head={-4:0}] [L579] COND TRUE \read(head) VAL [\old(len)=5, head={-3:0}, len=2, malloc(sizeof(struct node))={-4:0}, new_head={-4:0}] [L580] head->prev = new_head VAL [\old(len)=5, head={-3:0}, len=2, malloc(sizeof(struct node))={-4:0}, new_head={-4:0}] [L582] head = new_head VAL [\old(len)=5, head={-4:0}, len=2, malloc(sizeof(struct node))={-4:0}, new_head={-4:0}] [L583] len-- VAL [\old(len)=5, head={-4:0}, len=1, malloc(sizeof(struct node))={-4:0}, new_head={-4:0}] [L569] COND TRUE len > 0 VAL [\old(len)=5, head={-4:0}, len=1, malloc(sizeof(struct node))={-4:0}, new_head={-4:0}] [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); VAL [\old(len)=5, head={-4:0}, len=1, malloc(sizeof(struct node))={-5:0}, new_head={-5:0}] [L571] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=5, head={-4:0}, len=1, malloc(sizeof(struct node))={-5:0}, new_head={-5:0}] [L574] new_head->data_0 = 0 VAL [\old(len)=5, head={-4:0}, len=1, malloc(sizeof(struct node))={-5:0}, new_head={-5:0}] [L575] new_head->data_1 = 0 VAL [\old(len)=5, head={-4:0}, len=1, malloc(sizeof(struct node))={-5:0}, new_head={-5:0}] [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 VAL [\old(len)=5, __VERIFIER_nondet_int()=1, __VERIFIER_nondet_int() == len? 1 : 0=1, head={-4:0}, len=1, malloc(sizeof(struct node))={-5:0}, new_head={-5:0}] [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 VAL [\old(len)=5, __VERIFIER_nondet_int()=1, __VERIFIER_nondet_int() == len? 1 : 0=1, head={-4:0}, len=1, malloc(sizeof(struct node))={-5:0}, new_head={-5:0}] [L577] new_head->next = head VAL [\old(len)=5, head={-4:0}, len=1, malloc(sizeof(struct node))={-5:0}, new_head={-5:0}] [L578] new_head->prev = ((void *)0) VAL [\old(len)=5, head={-4:0}, len=1, malloc(sizeof(struct node))={-5:0}, new_head={-5:0}] [L579] COND TRUE \read(head) VAL [\old(len)=5, head={-4:0}, len=1, malloc(sizeof(struct node))={-5:0}, new_head={-5:0}] [L580] head->prev = new_head VAL [\old(len)=5, head={-4:0}, len=1, malloc(sizeof(struct node))={-5:0}, new_head={-5:0}] [L582] head = new_head VAL [\old(len)=5, head={-5:0}, len=1, malloc(sizeof(struct node))={-5:0}, new_head={-5:0}] [L583] len-- VAL [\old(len)=5, head={-5:0}, len=0, malloc(sizeof(struct node))={-5:0}, new_head={-5:0}] [L569] COND FALSE !(len > 0) VAL [\old(len)=5, head={-5:0}, len=0, malloc(sizeof(struct node))={-5:0}, new_head={-5:0}] [L585] return head; VAL [\old(len)=5, \result={-5:0}, head={-5:0}, len=0, malloc(sizeof(struct node))={-5:0}, new_head={-5:0}] [L589] RET, EXPR dll_create(len) VAL [dll_create(len)={-5:0}, len=5] [L589] DLL head = dll_create(len); VAL [dll_create(len)={-5:0}, head={-5:0}, len=5] [L590] head->next VAL [head={-5:0}, head->next={-4:0}, len=5] [L590] COND TRUE head->next VAL [head={-5:0}, head->next={-4:0}, len=5] [L591] EXPR head->data_0 VAL [head={-5:0}, head->data_0=0, len=5] [L591] EXPR 0 != head->data_0 || 0 != head->data_1 VAL [0 != head->data_0 || 0 != head->data_1=0, head={-5:0}, head->data_0=0, len=5] [L591] EXPR head->data_1 VAL [0 != head->data_0 || 0 != head->data_1=0, head={-5:0}, head->data_0=0, head->data_1=0, len=5] [L591] EXPR 0 != head->data_0 || 0 != head->data_1 VAL [0 != head->data_0 || 0 != head->data_1=0, head={-5:0}, head->data_0=0, head->data_1=0, len=5] [L591] 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 VAL [0 != head->data_0 || 0 != head->data_1=0, 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2=0, head={-5:0}, head->data_0=0, head->data_1=0, len=5] [L591] EXPR head->data_2 VAL [0 != head->data_0 || 0 != head->data_1=0, 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2=0, head={-5:0}, head->data_0=0, head->data_1=0, head->data_2=1, len=5] [L591] 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 VAL [0 != head->data_0 || 0 != head->data_1=0, 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2=1, head={-5:0}, head->data_0=0, head->data_1=0, head->data_2=1, len=5] [L591] COND TRUE 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 VAL [0 != head->data_0 || 0 != head->data_1=0, 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2=1, head={-5:0}, head->data_0=0, head->data_1=0, head->data_2=1, len=5] [L605] __VERIFIER_error() VAL [head={-5:0}, len=5] - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 112 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 9.8s, OverallIterations: 11, TraceHistogramMax: 5, AutomataDifference: 5.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 920 SDtfs, 1499 SDslu, 6246 SDs, 0 SdLazy, 3420 SolverSat, 232 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 260 GetRequests, 63 SyntacticMatches, 8 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 3.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=195occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 10 MinimizatonAttempts, 328 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 2.8s InterpolantComputationTime, 992 NumberOfCodeBlocks, 992 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 847 ConstructedInterpolants, 0 QuantifiedInterpolants, 334431 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 2 PerfectInterpolantSequences, 554/828 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...