/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/forester-heap/sll-rb-sentinel-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 17:28:32,920 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 17:28:32,923 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 17:28:32,939 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 17:28:32,939 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 17:28:32,940 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 17:28:32,942 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 17:28:32,944 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 17:28:32,946 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 17:28:32,947 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 17:28:32,948 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 17:28:32,949 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 17:28:32,949 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 17:28:32,950 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 17:28:32,951 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 17:28:32,953 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 17:28:32,953 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 17:28:32,954 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 17:28:32,956 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 17:28:32,959 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 17:28:32,960 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 17:28:32,961 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 17:28:32,963 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 17:28:32,964 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 17:28:32,966 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-17 17:28:32,966 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-17 17:28:32,967 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-17 17:28:32,968 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-17 17:28:32,968 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-17 17:28:32,969 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-17 17:28:32,969 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-17 17:28:32,970 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-17 17:28:32,971 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-17 17:28:32,972 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-17 17:28:32,974 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-17 17:28:32,974 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-17 17:28:32,975 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-17 17:28:32,975 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-17 17:28:32,977 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 17:28:32,978 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 17:28:32,979 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 17:28:32,982 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-17 17:28:32,997 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 17:28:32,998 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 17:28:33,000 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 17:28:33,000 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 17:28:33,001 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 17:28:33,001 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 17:28:33,001 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 17:28:33,001 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 17:28:33,001 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 17:28:33,002 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 17:28:33,003 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 17:28:33,003 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 17:28:33,003 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 17:28:33,003 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 17:28:33,004 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 17:28:33,004 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-17 17:28:33,004 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 17:28:33,004 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 17:28:33,004 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 17:28:33,005 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 17:28:33,005 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-17 17:28:33,005 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 17:28:33,006 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 [2020-07-17 17:28:33,356 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 17:28:33,374 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 17:28:33,378 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 17:28:33,380 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 17:28:33,380 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 17:28:33,381 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-rb-sentinel-2.i [2020-07-17 17:28:33,474 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11f7c92e3/17516f3bce304de7bc229d00cdef3d72/FLAG6176aa2e9 [2020-07-17 17:28:34,081 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 17:28:34,082 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/sll-rb-sentinel-2.i [2020-07-17 17:28:34,100 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11f7c92e3/17516f3bce304de7bc229d00cdef3d72/FLAG6176aa2e9 [2020-07-17 17:28:34,370 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11f7c92e3/17516f3bce304de7bc229d00cdef3d72 [2020-07-17 17:28:34,383 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 17:28:34,386 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 17:28:34,388 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 17:28:34,388 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 17:28:34,392 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 17:28:34,393 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 05:28:34" (1/1) ... [2020-07-17 17:28:34,397 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1423abb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:28:34, skipping insertion in model container [2020-07-17 17:28:34,397 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 05:28:34" (1/1) ... [2020-07-17 17:28:34,405 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 17:28:34,460 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 17:28:34,931 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 17:28:34,944 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 17:28:34,997 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 17:28:35,056 INFO L208 MainTranslator]: Completed translation [2020-07-17 17:28:35,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:28:35 WrapperNode [2020-07-17 17:28:35,057 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 17:28:35,059 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 17:28:35,059 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 17:28:35,060 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 17:28:35,074 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:28:35" (1/1) ... [2020-07-17 17:28:35,075 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:28:35" (1/1) ... [2020-07-17 17:28:35,094 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:28:35" (1/1) ... [2020-07-17 17:28:35,095 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:28:35" (1/1) ... [2020-07-17 17:28:35,113 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:28:35" (1/1) ... [2020-07-17 17:28:35,121 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:28:35" (1/1) ... [2020-07-17 17:28:35,128 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:28:35" (1/1) ... [2020-07-17 17:28:35,136 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 17:28:35,137 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 17:28:35,137 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 17:28:35,137 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 17:28:35,138 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:28:35" (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 [2020-07-17 17:28:35,222 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 17:28:35,222 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 17:28:35,222 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 17:28:35,222 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-17 17:28:35,223 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-17 17:28:35,223 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-17 17:28:35,224 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-17 17:28:35,224 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-17 17:28:35,224 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-17 17:28:35,224 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-17 17:28:35,224 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-17 17:28:35,225 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-17 17:28:35,225 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-17 17:28:35,225 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-17 17:28:35,225 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-17 17:28:35,226 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-17 17:28:35,226 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-17 17:28:35,226 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-17 17:28:35,226 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-17 17:28:35,227 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-17 17:28:35,227 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-17 17:28:35,227 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-17 17:28:35,227 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-17 17:28:35,228 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-17 17:28:35,228 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-17 17:28:35,229 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-17 17:28:35,229 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-17 17:28:35,229 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-17 17:28:35,230 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-17 17:28:35,230 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-17 17:28:35,230 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-17 17:28:35,230 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-17 17:28:35,230 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-17 17:28:35,230 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-17 17:28:35,231 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-17 17:28:35,231 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-17 17:28:35,231 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-17 17:28:35,231 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-17 17:28:35,231 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-17 17:28:35,231 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-17 17:28:35,232 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-17 17:28:35,232 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-17 17:28:35,232 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-17 17:28:35,232 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-17 17:28:35,232 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-17 17:28:35,232 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-17 17:28:35,233 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-17 17:28:35,233 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-17 17:28:35,233 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-17 17:28:35,233 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-17 17:28:35,233 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-17 17:28:35,233 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-17 17:28:35,234 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-17 17:28:35,234 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-17 17:28:35,234 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-17 17:28:35,234 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-17 17:28:35,234 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-17 17:28:35,234 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-07-17 17:28:35,235 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-17 17:28:35,235 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-17 17:28:35,235 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-17 17:28:35,235 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-17 17:28:35,235 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-17 17:28:35,235 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-17 17:28:35,236 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-17 17:28:35,236 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-17 17:28:35,236 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-17 17:28:35,236 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-17 17:28:35,236 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-17 17:28:35,236 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-17 17:28:35,237 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-17 17:28:35,237 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-17 17:28:35,237 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-17 17:28:35,237 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-17 17:28:35,237 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-17 17:28:35,238 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-17 17:28:35,238 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-17 17:28:35,238 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-17 17:28:35,238 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-17 17:28:35,238 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-17 17:28:35,238 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-17 17:28:35,239 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-17 17:28:35,239 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-17 17:28:35,239 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-17 17:28:35,239 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-17 17:28:35,239 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-17 17:28:35,240 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-17 17:28:35,240 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-17 17:28:35,240 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-17 17:28:35,240 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-17 17:28:35,240 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-17 17:28:35,240 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-17 17:28:35,241 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-17 17:28:35,241 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-17 17:28:35,241 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-17 17:28:35,241 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-17 17:28:35,241 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-17 17:28:35,241 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-17 17:28:35,242 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-17 17:28:35,242 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-17 17:28:35,242 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-17 17:28:35,242 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-17 17:28:35,242 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-17 17:28:35,242 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-17 17:28:35,242 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-17 17:28:35,243 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-17 17:28:35,243 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-17 17:28:35,243 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 17:28:35,243 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 17:28:35,243 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-17 17:28:35,244 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-17 17:28:35,244 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-17 17:28:35,244 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-17 17:28:35,244 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-17 17:28:35,244 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-17 17:28:35,244 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 17:28:35,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 17:28:35,894 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 17:28:35,894 INFO L295 CfgBuilder]: Removed 11 assume(true) statements. [2020-07-17 17:28:35,900 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 05:28:35 BoogieIcfgContainer [2020-07-17 17:28:35,900 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 17:28:35,902 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 17:28:35,902 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 17:28:35,906 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 17:28:35,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 05:28:34" (1/3) ... [2020-07-17 17:28:35,907 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@961bdf9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 05:28:35, skipping insertion in model container [2020-07-17 17:28:35,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:28:35" (2/3) ... [2020-07-17 17:28:35,908 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@961bdf9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 05:28:35, skipping insertion in model container [2020-07-17 17:28:35,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 05:28:35" (3/3) ... [2020-07-17 17:28:35,910 INFO L109 eAbstractionObserver]: Analyzing ICFG sll-rb-sentinel-2.i [2020-07-17 17:28:35,923 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-17 17:28:35,933 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2020-07-17 17:28:35,948 INFO L251 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-07-17 17:28:35,972 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 17:28:35,972 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 17:28:35,972 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-07-17 17:28:35,973 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 17:28:35,973 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 17:28:35,973 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 17:28:35,973 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 17:28:35,973 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 17:28:35,990 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states. [2020-07-17 17:28:36,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-17 17:28:36,004 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:28:36,006 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:28:36,006 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:28:36,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:28:36,013 INFO L82 PathProgramCache]: Analyzing trace with hash -159181327, now seen corresponding path program 1 times [2020-07-17 17:28:36,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:28:36,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1791840551] [2020-07-17 17:28:36,022 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:28:36,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:28:36,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:28:36,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 17:28:36,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1791840551] [2020-07-17 17:28:36,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 17:28:36,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 17:28:36,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632958099] [2020-07-17 17:28:36,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 17:28:36,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:28:36,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 17:28:36,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 17:28:36,365 INFO L87 Difference]: Start difference. First operand 98 states. Second operand 3 states. [2020-07-17 17:28:36,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:28:36,769 INFO L93 Difference]: Finished difference Result 157 states and 194 transitions. [2020-07-17 17:28:36,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 17:28:36,771 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-17 17:28:36,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:28:36,784 INFO L225 Difference]: With dead ends: 157 [2020-07-17 17:28:36,785 INFO L226 Difference]: Without dead ends: 74 [2020-07-17 17:28:36,790 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 17:28:36,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-07-17 17:28:36,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-07-17 17:28:36,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-07-17 17:28:36,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2020-07-17 17:28:36,844 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 21 [2020-07-17 17:28:36,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:28:36,845 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2020-07-17 17:28:36,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 17:28:36,845 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2020-07-17 17:28:36,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-17 17:28:36,846 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:28:36,847 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:28:36,847 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 17:28:36,848 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:28:36,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:28:36,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1476818129, now seen corresponding path program 1 times [2020-07-17 17:28:36,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:28:36,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1609545265] [2020-07-17 17:28:36,849 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:28:36,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:28:37,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:28:37,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 17:28:37,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1609545265] [2020-07-17 17:28:37,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 17:28:37,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-17 17:28:37,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015873508] [2020-07-17 17:28:37,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-17 17:28:37,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:28:37,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-17 17:28:37,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-07-17 17:28:37,060 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand 8 states. [2020-07-17 17:28:37,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:28:37,389 INFO L93 Difference]: Finished difference Result 92 states and 97 transitions. [2020-07-17 17:28:37,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-17 17:28:37,390 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-07-17 17:28:37,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:28:37,392 INFO L225 Difference]: With dead ends: 92 [2020-07-17 17:28:37,392 INFO L226 Difference]: Without dead ends: 90 [2020-07-17 17:28:37,394 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-07-17 17:28:37,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-07-17 17:28:37,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 72. [2020-07-17 17:28:37,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-17 17:28:37,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2020-07-17 17:28:37,412 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 23 [2020-07-17 17:28:37,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:28:37,413 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2020-07-17 17:28:37,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-17 17:28:37,413 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2020-07-17 17:28:37,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-17 17:28:37,414 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:28:37,414 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] [2020-07-17 17:28:37,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 17:28:37,415 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:28:37,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:28:37,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1518762392, now seen corresponding path program 1 times [2020-07-17 17:28:37,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:28:37,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1342259468] [2020-07-17 17:28:37,416 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:28:37,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:28:37,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:28:37,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 17:28:37,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1342259468] [2020-07-17 17:28:37,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 17:28:37,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-17 17:28:37,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764679653] [2020-07-17 17:28:37,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-17 17:28:37,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:28:37,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-17 17:28:37,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-07-17 17:28:37,603 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand 9 states. [2020-07-17 17:28:37,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:28:37,977 INFO L93 Difference]: Finished difference Result 120 states and 126 transitions. [2020-07-17 17:28:37,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-17 17:28:37,978 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-07-17 17:28:37,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:28:37,984 INFO L225 Difference]: With dead ends: 120 [2020-07-17 17:28:37,984 INFO L226 Difference]: Without dead ends: 117 [2020-07-17 17:28:37,988 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2020-07-17 17:28:37,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-07-17 17:28:38,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 81. [2020-07-17 17:28:38,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-07-17 17:28:38,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2020-07-17 17:28:38,014 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 27 [2020-07-17 17:28:38,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:28:38,015 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2020-07-17 17:28:38,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-17 17:28:38,015 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2020-07-17 17:28:38,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-17 17:28:38,017 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:28:38,017 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] [2020-07-17 17:28:38,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-17 17:28:38,018 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:28:38,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:28:38,018 INFO L82 PathProgramCache]: Analyzing trace with hash 2047332937, now seen corresponding path program 1 times [2020-07-17 17:28:38,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:28:38,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1469077605] [2020-07-17 17:28:38,019 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:28:38,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:28:38,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:28:38,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 17:28:38,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1469077605] [2020-07-17 17:28:38,159 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 17:28:38,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-17 17:28:38,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682473449] [2020-07-17 17:28:38,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-17 17:28:38,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:28:38,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-17 17:28:38,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-17 17:28:38,161 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand 6 states. [2020-07-17 17:28:38,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:28:38,399 INFO L93 Difference]: Finished difference Result 114 states and 120 transitions. [2020-07-17 17:28:38,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-17 17:28:38,399 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 36 [2020-07-17 17:28:38,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:28:38,401 INFO L225 Difference]: With dead ends: 114 [2020-07-17 17:28:38,401 INFO L226 Difference]: Without dead ends: 92 [2020-07-17 17:28:38,402 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-17 17:28:38,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-07-17 17:28:38,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 84. [2020-07-17 17:28:38,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-07-17 17:28:38,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2020-07-17 17:28:38,420 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 36 [2020-07-17 17:28:38,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:28:38,421 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2020-07-17 17:28:38,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-17 17:28:38,421 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2020-07-17 17:28:38,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-17 17:28:38,423 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:28:38,423 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:28:38,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-17 17:28:38,424 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:28:38,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:28:38,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1237644091, now seen corresponding path program 1 times [2020-07-17 17:28:38,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:28:38,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [144621835] [2020-07-17 17:28:38,425 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:28:38,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:28:38,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:28:38,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 17:28:38,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [144621835] [2020-07-17 17:28:38,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:28:38,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-07-17 17:28:38,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601964520] [2020-07-17 17:28:38,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-17 17:28:38,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:28:38,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-17 17:28:38,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-07-17 17:28:38,945 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand 16 states. [2020-07-17 17:28:40,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:28:40,023 INFO L93 Difference]: Finished difference Result 155 states and 162 transitions. [2020-07-17 17:28:40,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-17 17:28:40,025 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-07-17 17:28:40,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:28:40,027 INFO L225 Difference]: With dead ends: 155 [2020-07-17 17:28:40,027 INFO L226 Difference]: Without dead ends: 152 [2020-07-17 17:28:40,029 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2020-07-17 17:28:40,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-07-17 17:28:40,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 97. [2020-07-17 17:28:40,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-07-17 17:28:40,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 103 transitions. [2020-07-17 17:28:40,056 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 103 transitions. Word has length 40 [2020-07-17 17:28:40,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:28:40,057 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 103 transitions. [2020-07-17 17:28:40,057 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-17 17:28:40,057 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 103 transitions. [2020-07-17 17:28:40,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-17 17:28:40,059 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:28:40,062 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:28:40,063 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-17 17:28:40,063 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:28:40,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:28:40,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1411163060, now seen corresponding path program 1 times [2020-07-17 17:28:40,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:28:40,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1387917683] [2020-07-17 17:28:40,065 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:28:40,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:28:40,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:28:40,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 17:28:40,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1387917683] [2020-07-17 17:28:40,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:28:40,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-17 17:28:40,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810572410] [2020-07-17 17:28:40,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-17 17:28:40,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:28:40,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-17 17:28:40,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-17 17:28:40,205 INFO L87 Difference]: Start difference. First operand 97 states and 103 transitions. Second operand 7 states. [2020-07-17 17:28:40,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:28:40,500 INFO L93 Difference]: Finished difference Result 136 states and 143 transitions. [2020-07-17 17:28:40,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-17 17:28:40,501 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 43 [2020-07-17 17:28:40,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:28:40,502 INFO L225 Difference]: With dead ends: 136 [2020-07-17 17:28:40,503 INFO L226 Difference]: Without dead ends: 97 [2020-07-17 17:28:40,504 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-07-17 17:28:40,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-07-17 17:28:40,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-07-17 17:28:40,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-07-17 17:28:40,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 102 transitions. [2020-07-17 17:28:40,526 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 102 transitions. Word has length 43 [2020-07-17 17:28:40,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:28:40,527 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 102 transitions. [2020-07-17 17:28:40,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-17 17:28:40,527 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 102 transitions. [2020-07-17 17:28:40,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-07-17 17:28:40,529 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:28:40,529 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:28:40,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-17 17:28:40,530 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:28:40,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:28:40,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1215747511, now seen corresponding path program 1 times [2020-07-17 17:28:40,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:28:40,531 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1691814904] [2020-07-17 17:28:40,531 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:28:40,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:28:41,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:28:41,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 17:28:41,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1691814904] [2020-07-17 17:28:41,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:28:41,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-07-17 17:28:41,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482062670] [2020-07-17 17:28:41,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-17 17:28:41,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:28:41,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-17 17:28:41,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-07-17 17:28:41,167 INFO L87 Difference]: Start difference. First operand 97 states and 102 transitions. Second operand 20 states. [2020-07-17 17:28:42,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:28:42,381 INFO L93 Difference]: Finished difference Result 163 states and 170 transitions. [2020-07-17 17:28:42,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-17 17:28:42,382 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 47 [2020-07-17 17:28:42,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:28:42,383 INFO L225 Difference]: With dead ends: 163 [2020-07-17 17:28:42,383 INFO L226 Difference]: Without dead ends: 160 [2020-07-17 17:28:42,385 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=353, Invalid=1129, Unknown=0, NotChecked=0, Total=1482 [2020-07-17 17:28:42,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-07-17 17:28:42,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 106. [2020-07-17 17:28:42,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-07-17 17:28:42,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 111 transitions. [2020-07-17 17:28:42,407 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 111 transitions. Word has length 47 [2020-07-17 17:28:42,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:28:42,407 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 111 transitions. [2020-07-17 17:28:42,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-17 17:28:42,407 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 111 transitions. [2020-07-17 17:28:42,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-17 17:28:42,409 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:28:42,409 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-07-17 17:28:42,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-17 17:28:42,410 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:28:42,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:28:42,410 INFO L82 PathProgramCache]: Analyzing trace with hash 231328440, now seen corresponding path program 2 times [2020-07-17 17:28:42,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:28:42,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [241409236] [2020-07-17 17:28:42,411 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:28:42,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:28:42,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:28:43,004 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 17:28:43,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [241409236] [2020-07-17 17:28:43,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:28:43,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-07-17 17:28:43,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378201971] [2020-07-17 17:28:43,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-17 17:28:43,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:28:43,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-17 17:28:43,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2020-07-17 17:28:43,007 INFO L87 Difference]: Start difference. First operand 106 states and 111 transitions. Second operand 20 states. [2020-07-17 17:28:44,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:28:44,016 INFO L93 Difference]: Finished difference Result 179 states and 188 transitions. [2020-07-17 17:28:44,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-17 17:28:44,017 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 53 [2020-07-17 17:28:44,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:28:44,019 INFO L225 Difference]: With dead ends: 179 [2020-07-17 17:28:44,019 INFO L226 Difference]: Without dead ends: 176 [2020-07-17 17:28:44,020 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=310, Invalid=950, Unknown=0, NotChecked=0, Total=1260 [2020-07-17 17:28:44,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-07-17 17:28:44,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 117. [2020-07-17 17:28:44,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-07-17 17:28:44,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 124 transitions. [2020-07-17 17:28:44,042 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 124 transitions. Word has length 53 [2020-07-17 17:28:44,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:28:44,043 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 124 transitions. [2020-07-17 17:28:44,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-17 17:28:44,043 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 124 transitions. [2020-07-17 17:28:44,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-17 17:28:44,044 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:28:44,044 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:28:44,045 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-17 17:28:44,045 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:28:44,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:28:44,046 INFO L82 PathProgramCache]: Analyzing trace with hash -2144912159, now seen corresponding path program 1 times [2020-07-17 17:28:44,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:28:44,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [754095885] [2020-07-17 17:28:44,046 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:28:44,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:28:44,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:28:44,575 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 17:28:44,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [754095885] [2020-07-17 17:28:44,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:28:44,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-07-17 17:28:44,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360400528] [2020-07-17 17:28:44,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-17 17:28:44,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:28:44,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-17 17:28:44,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2020-07-17 17:28:44,583 INFO L87 Difference]: Start difference. First operand 117 states and 124 transitions. Second operand 22 states. [2020-07-17 17:28:46,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:28:46,362 INFO L93 Difference]: Finished difference Result 197 states and 208 transitions. [2020-07-17 17:28:46,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-17 17:28:46,365 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 56 [2020-07-17 17:28:46,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:28:46,367 INFO L225 Difference]: With dead ends: 197 [2020-07-17 17:28:46,367 INFO L226 Difference]: Without dead ends: 175 [2020-07-17 17:28:46,369 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=390, Invalid=1680, Unknown=0, NotChecked=0, Total=2070 [2020-07-17 17:28:46,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-07-17 17:28:46,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 137. [2020-07-17 17:28:46,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-07-17 17:28:46,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 145 transitions. [2020-07-17 17:28:46,396 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 145 transitions. Word has length 56 [2020-07-17 17:28:46,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:28:46,397 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 145 transitions. [2020-07-17 17:28:46,397 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-17 17:28:46,397 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 145 transitions. [2020-07-17 17:28:46,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-07-17 17:28:46,398 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:28:46,398 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:28:46,399 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-17 17:28:46,399 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:28:46,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:28:46,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1025074422, now seen corresponding path program 1 times [2020-07-17 17:28:46,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:28:46,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [738069210] [2020-07-17 17:28:46,400 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:28:46,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:28:47,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:28:47,213 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-17 17:28:47,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [738069210] [2020-07-17 17:28:47,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:28:47,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-07-17 17:28:47,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737589983] [2020-07-17 17:28:47,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-17 17:28:47,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:28:47,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-17 17:28:47,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-07-17 17:28:47,221 INFO L87 Difference]: Start difference. First operand 137 states and 145 transitions. Second operand 22 states. [2020-07-17 17:28:48,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:28:48,542 INFO L93 Difference]: Finished difference Result 148 states and 156 transitions. [2020-07-17 17:28:48,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-17 17:28:48,543 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 60 [2020-07-17 17:28:48,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:28:48,544 INFO L225 Difference]: With dead ends: 148 [2020-07-17 17:28:48,544 INFO L226 Difference]: Without dead ends: 145 [2020-07-17 17:28:48,546 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=446, Invalid=1360, Unknown=0, NotChecked=0, Total=1806 [2020-07-17 17:28:48,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-07-17 17:28:48,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 103. [2020-07-17 17:28:48,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-07-17 17:28:48,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 108 transitions. [2020-07-17 17:28:48,567 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 108 transitions. Word has length 60 [2020-07-17 17:28:48,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:28:48,567 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 108 transitions. [2020-07-17 17:28:48,567 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-17 17:28:48,567 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 108 transitions. [2020-07-17 17:28:48,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-07-17 17:28:48,568 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:28:48,568 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:28:48,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-17 17:28:48,569 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:28:48,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:28:48,569 INFO L82 PathProgramCache]: Analyzing trace with hash -412836324, now seen corresponding path program 2 times [2020-07-17 17:28:48,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:28:48,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1014694172] [2020-07-17 17:28:48,570 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:28:48,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:28:48,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:28:48,874 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 17:28:48,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1014694172] [2020-07-17 17:28:48,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:28:48,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-07-17 17:28:48,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173754423] [2020-07-17 17:28:48,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-17 17:28:48,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:28:48,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-17 17:28:48,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2020-07-17 17:28:48,877 INFO L87 Difference]: Start difference. First operand 103 states and 108 transitions. Second operand 17 states. [2020-07-17 17:28:49,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:28:49,905 INFO L93 Difference]: Finished difference Result 147 states and 153 transitions. [2020-07-17 17:28:49,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-17 17:28:49,906 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 63 [2020-07-17 17:28:49,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:28:49,907 INFO L225 Difference]: With dead ends: 147 [2020-07-17 17:28:49,908 INFO L226 Difference]: Without dead ends: 101 [2020-07-17 17:28:49,909 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=179, Invalid=943, Unknown=0, NotChecked=0, Total=1122 [2020-07-17 17:28:49,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-07-17 17:28:49,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 87. [2020-07-17 17:28:49,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-07-17 17:28:49,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2020-07-17 17:28:49,926 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 63 [2020-07-17 17:28:49,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:28:49,926 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2020-07-17 17:28:49,927 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-17 17:28:49,927 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2020-07-17 17:28:49,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-07-17 17:28:49,928 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:28:49,928 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:28:49,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-17 17:28:49,928 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:28:49,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:28:49,929 INFO L82 PathProgramCache]: Analyzing trace with hash -80620955, now seen corresponding path program 1 times [2020-07-17 17:28:49,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:28:49,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [187665523] [2020-07-17 17:28:49,930 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:28:49,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:28:50,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:28:51,025 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 17:28:51,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [187665523] [2020-07-17 17:28:51,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:28:51,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-07-17 17:28:51,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607728184] [2020-07-17 17:28:51,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-17 17:28:51,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:28:51,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-17 17:28:51,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2020-07-17 17:28:51,030 INFO L87 Difference]: Start difference. First operand 87 states and 91 transitions. Second operand 25 states. [2020-07-17 17:28:51,967 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2020-07-17 17:28:52,128 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2020-07-17 17:28:52,413 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-07-17 17:28:52,743 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2020-07-17 17:28:53,033 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 66 [2020-07-17 17:28:53,256 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 71 [2020-07-17 17:28:53,459 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2020-07-17 17:28:53,805 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2020-07-17 17:28:55,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:28:55,777 INFO L93 Difference]: Finished difference Result 172 states and 179 transitions. [2020-07-17 17:28:55,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-07-17 17:28:55,777 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 63 [2020-07-17 17:28:55,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:28:55,779 INFO L225 Difference]: With dead ends: 172 [2020-07-17 17:28:55,779 INFO L226 Difference]: Without dead ends: 170 [2020-07-17 17:28:55,781 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=491, Invalid=2589, Unknown=0, NotChecked=0, Total=3080 [2020-07-17 17:28:55,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-07-17 17:28:55,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 122. [2020-07-17 17:28:55,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-07-17 17:28:55,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 128 transitions. [2020-07-17 17:28:55,813 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 128 transitions. Word has length 63 [2020-07-17 17:28:55,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:28:55,814 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 128 transitions. [2020-07-17 17:28:55,814 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-17 17:28:55,814 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 128 transitions. [2020-07-17 17:28:55,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-17 17:28:55,815 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:28:55,815 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:28:55,815 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-07-17 17:28:55,816 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:28:55,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:28:55,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1761981780, now seen corresponding path program 1 times [2020-07-17 17:28:55,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:28:55,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1237412104] [2020-07-17 17:28:55,817 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:28:55,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 17:28:55,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 17:28:55,911 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-17 17:28:55,911 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-17 17:28:55,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-17 17:28:55,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 05:28:55 BoogieIcfgContainer [2020-07-17 17:28:55,983 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 17:28:55,985 INFO L168 Benchmark]: Toolchain (without parser) took 21600.51 ms. Allocated memory was 142.6 MB in the beginning and 457.2 MB in the end (delta: 314.6 MB). Free memory was 100.1 MB in the beginning and 384.7 MB in the end (delta: -284.6 MB). Peak memory consumption was 30.0 MB. Max. memory is 7.1 GB. [2020-07-17 17:28:55,985 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 142.6 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-17 17:28:55,986 INFO L168 Benchmark]: CACSL2BoogieTranslator took 670.84 ms. Allocated memory was 142.6 MB in the beginning and 201.3 MB in the end (delta: 58.7 MB). Free memory was 99.7 MB in the beginning and 168.0 MB in the end (delta: -68.2 MB). Peak memory consumption was 22.4 MB. Max. memory is 7.1 GB. [2020-07-17 17:28:55,987 INFO L168 Benchmark]: Boogie Preprocessor took 76.81 ms. Allocated memory is still 201.3 MB. Free memory was 168.0 MB in the beginning and 165.1 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. [2020-07-17 17:28:55,988 INFO L168 Benchmark]: RCFGBuilder took 763.61 ms. Allocated memory is still 201.3 MB. Free memory was 165.1 MB in the beginning and 113.4 MB in the end (delta: 51.7 MB). Peak memory consumption was 51.7 MB. Max. memory is 7.1 GB. [2020-07-17 17:28:55,989 INFO L168 Benchmark]: TraceAbstraction took 20081.11 ms. Allocated memory was 201.3 MB in the beginning and 457.2 MB in the end (delta: 255.9 MB). Free memory was 112.7 MB in the beginning and 384.7 MB in the end (delta: -272.0 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-17 17:28:56,001 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 142.6 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 670.84 ms. Allocated memory was 142.6 MB in the beginning and 201.3 MB in the end (delta: 58.7 MB). Free memory was 99.7 MB in the beginning and 168.0 MB in the end (delta: -68.2 MB). Peak memory consumption was 22.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 76.81 ms. Allocated memory is still 201.3 MB. Free memory was 168.0 MB in the beginning and 165.1 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 763.61 ms. Allocated memory is still 201.3 MB. Free memory was 165.1 MB in the beginning and 113.4 MB in the end (delta: 51.7 MB). Peak memory consumption was 51.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 20081.11 ms. Allocated memory was 201.3 MB in the beginning and 457.2 MB in the end (delta: 255.9 MB). Free memory was 112.7 MB in the beginning and 384.7 MB in the end (delta: -272.0 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1039]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L994] SLL* null = malloc(sizeof(SLL)); VAL [malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L995] null->colour = BLACK VAL [malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L996] null->next = ((void*)0) VAL [malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L998] SLL* list = malloc(sizeof(SLL)); VAL [list={-2:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L999] list->next = null VAL [list={-2:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1000] list->colour = BLACK VAL [list={-2:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}, null={-1:0}] [L1002] SLL* end = list; VAL [end={-2:0}, list={-2:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1005] COND TRUE __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=1, end={-2:0}, list={-2:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1008] end->next = malloc(sizeof(SLL)) VAL [end={-2:0}, list={-2:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-3:0}, null={-1:0}] [L1009] EXPR end->next VAL [end={-2:0}, end->next={-3:0}, list={-2:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-3:0}, null={-1:0}] [L1009] end = end->next VAL [end={-3:0}, end->next={-3:0}, list={-2:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-3:0}, null={-1:0}] [L1010] end->next = null VAL [end={-3:0}, list={-2:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-3:0}, null={-1:0}] [L1012] COND FALSE !(__VERIFIER_nondet_int()) VAL [__VERIFIER_nondet_int()=0, end={-3:0}, list={-2:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-3:0}, null={-1:0}] [L1018] end->colour = RED VAL [end={-3:0}, list={-2:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-3:0}, null={-1:0}] [L1019] end->next = malloc(sizeof(SLL)) VAL [end={-3:0}, list={-2:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-3:0}, null={-1:0}] [L1020] EXPR end->next VAL [end={-3:0}, end->next={-4:0}, list={-2:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-3:0}, null={-1:0}] [L1020] end = end->next VAL [end={-4:0}, end->next={-4:0}, list={-2:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-3:0}, null={-1:0}] [L1021] end->next = null VAL [end={-4:0}, list={-2:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-3:0}, null={-1:0}] [L1022] end->colour = BLACK VAL [end={-4:0}, list={-2:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-3:0}, null={-1:0}] [L1005] COND FALSE !(__VERIFIER_nondet_int()) VAL [__VERIFIER_nondet_int()=0, end={-4:0}, list={-2:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-3:0}, null={-1:0}] [L1026] end = null VAL [end={-1:0}, list={-2:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-3:0}, null={-1:0}] [L1027] end = list VAL [end={-2:0}, list={-2:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-3:0}, null={-1:0}] [L1030] COND FALSE !(!(null != end)) VAL [end={-2:0}, list={-2:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-3:0}, null={-1:0}] [L1031] EXPR end->colour VAL [end={-2:0}, end->colour=1, list={-2:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-3:0}, null={-1:0}] [L1031] COND FALSE !(!(BLACK == end->colour)) VAL [end={-2:0}, end->colour=1, list={-2:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-3:0}, null={-1:0}] [L1033] COND TRUE null != end VAL [end={-2:0}, list={-2:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-3:0}, null={-1:0}] [L1035] EXPR end->colour VAL [end={-2:0}, end->colour=1, list={-2:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-3:0}, null={-1:0}] [L1035] COND FALSE !(RED == end->colour) VAL [end={-2:0}, end->colour=1, list={-2:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-3:0}, null={-1:0}] [L1042] EXPR end->next VAL [end={-2:0}, end->next={-3:0}, list={-2:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-3:0}, null={-1:0}] [L1042] end = end->next VAL [end={-3:0}, end->next={-3:0}, list={-2:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-3:0}, null={-1:0}] [L1033] COND TRUE null != end VAL [end={-3:0}, list={-2:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-3:0}, null={-1:0}] [L1035] EXPR end->colour VAL [end={-3:0}, end->colour=0, list={-2:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-3:0}, null={-1:0}] [L1035] COND TRUE RED == end->colour VAL [end={-3:0}, end->colour=0, list={-2:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-3:0}, null={-1:0}] [L1037] EXPR end->next VAL [end={-3:0}, end->next={-4:0}, list={-2:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-3:0}, null={-1:0}] [L1037] end = end->next VAL [end={-4:0}, end->next={-4:0}, list={-2:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-3:0}, null={-1:0}] [L1038] COND FALSE !(!(null != end)) VAL [end={-4:0}, list={-2:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-3:0}, null={-1:0}] [L1039] EXPR end->colour VAL [end={-4:0}, end->colour=1, list={-2:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-3:0}, null={-1:0}] [L1039] COND TRUE !(BLACK != end->colour) VAL [end={-4:0}, end->colour=1, list={-2:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-3:0}, null={-1:0}] [L1039] __VERIFIER_error() VAL [end={-4:0}, list={-2:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-3:0}, null={-1:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 98 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 19.9s, OverallIterations: 13, TraceHistogramMax: 3, AutomataDifference: 13.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 724 SDtfs, 4234 SDslu, 4212 SDs, 0 SdLazy, 4613 SolverSat, 752 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 364 GetRequests, 47 SyntacticMatches, 7 SemanticMatches, 310 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1767 ImplicationChecksByTransitivity, 11.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=137occurred in iteration=9, 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, 12 MinimizatonAttempts, 372 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 4.8s InterpolantComputationTime, 599 NumberOfCodeBlocks, 599 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 520 ConstructedInterpolants, 0 QuantifiedInterpolants, 374421 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 12 InterpolantComputations, 4 PerfectInterpolantSequences, 11/64 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...