/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 0.1.25-3af5e1f [2020-09-04 22:07:44,959 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 22:07:44,963 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 22:07:44,989 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 22:07:44,990 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 22:07:44,991 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 22:07:44,992 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 22:07:44,994 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 22:07:44,996 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 22:07:44,997 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 22:07:44,998 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 22:07:44,999 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 22:07:44,999 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 22:07:45,000 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 22:07:45,001 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 22:07:45,002 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 22:07:45,003 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 22:07:45,004 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 22:07:45,006 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 22:07:45,008 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 22:07:45,010 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 22:07:45,011 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 22:07:45,012 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 22:07:45,013 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 22:07:45,016 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-04 22:07:45,017 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-04 22:07:45,017 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-04 22:07:45,018 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-04 22:07:45,018 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-04 22:07:45,020 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-04 22:07:45,020 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-04 22:07:45,021 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-04 22:07:45,022 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-04 22:07:45,023 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-04 22:07:45,024 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-04 22:07:45,024 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-04 22:07:45,028 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-04 22:07:45,028 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-04 22:07:45,028 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 22:07:45,029 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 22:07:45,031 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 22:07:45,031 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 22:07:45,044 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 22:07:45,044 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 22:07:45,045 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 22:07:45,045 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 22:07:45,046 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 22:07:45,046 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 22:07:45,046 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 22:07:45,046 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 22:07:45,046 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 22:07:45,047 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 22:07:45,047 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 22:07:45,047 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 22:07:45,047 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 22:07:45,047 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 22:07:45,048 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 22:07:45,048 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 22:07:45,048 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 22:07:45,048 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 22:07:45,048 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 22:07:45,049 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 22:07:45,049 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 22:07:45,049 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 22:07:45,049 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 [2020-09-04 22:07:45,485 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 22:07:45,510 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 22:07:45,514 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 22:07:45,516 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 22:07:45,517 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 22:07:45,519 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-rb-sentinel-2.i [2020-09-04 22:07:45,613 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/42921c427/2e7805f7f97d4a57b06f463aa2768e47/FLAGf504f6843 [2020-09-04 22:07:46,217 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 22:07:46,218 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/sll-rb-sentinel-2.i [2020-09-04 22:07:46,237 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/42921c427/2e7805f7f97d4a57b06f463aa2768e47/FLAGf504f6843 [2020-09-04 22:07:46,480 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/42921c427/2e7805f7f97d4a57b06f463aa2768e47 [2020-09-04 22:07:46,494 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 22:07:46,496 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 22:07:46,497 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 22:07:46,498 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 22:07:46,502 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 22:07:46,503 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 10:07:46" (1/1) ... [2020-09-04 22:07:46,507 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28d6e00c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:07:46, skipping insertion in model container [2020-09-04 22:07:46,507 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 10:07:46" (1/1) ... [2020-09-04 22:07:46,516 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 22:07:46,589 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 22:07:47,062 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 22:07:47,081 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 22:07:47,129 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 22:07:47,196 INFO L208 MainTranslator]: Completed translation [2020-09-04 22:07:47,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:07:47 WrapperNode [2020-09-04 22:07:47,198 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 22:07:47,198 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 22:07:47,199 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 22:07:47,199 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 22:07:47,216 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:07:47" (1/1) ... [2020-09-04 22:07:47,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:07:47" (1/1) ... [2020-09-04 22:07:47,243 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:07:47" (1/1) ... [2020-09-04 22:07:47,243 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:07:47" (1/1) ... [2020-09-04 22:07:47,259 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:07:47" (1/1) ... [2020-09-04 22:07:47,267 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:07:47" (1/1) ... [2020-09-04 22:07:47,270 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:07:47" (1/1) ... [2020-09-04 22:07:47,277 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 22:07:47,277 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 22:07:47,277 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 22:07:47,277 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 22:07:47,279 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:07:47" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 22:07:47,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 22:07:47,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 22:07:47,361 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 22:07:47,362 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-09-04 22:07:47,362 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-09-04 22:07:47,362 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-09-04 22:07:47,362 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-09-04 22:07:47,362 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-09-04 22:07:47,363 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-09-04 22:07:47,363 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-09-04 22:07:47,363 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-09-04 22:07:47,363 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-09-04 22:07:47,363 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-09-04 22:07:47,364 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-09-04 22:07:47,364 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-09-04 22:07:47,364 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-09-04 22:07:47,364 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-09-04 22:07:47,365 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-09-04 22:07:47,365 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-09-04 22:07:47,365 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-09-04 22:07:47,365 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-09-04 22:07:47,366 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-09-04 22:07:47,368 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-09-04 22:07:47,368 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-09-04 22:07:47,368 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-09-04 22:07:47,369 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-09-04 22:07:47,369 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-09-04 22:07:47,369 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-09-04 22:07:47,369 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-09-04 22:07:47,369 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-09-04 22:07:47,369 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-09-04 22:07:47,370 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-09-04 22:07:47,370 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-09-04 22:07:47,370 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-09-04 22:07:47,371 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-09-04 22:07:47,371 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-09-04 22:07:47,371 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-09-04 22:07:47,371 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-09-04 22:07:47,371 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-09-04 22:07:47,371 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-09-04 22:07:47,371 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-09-04 22:07:47,372 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-09-04 22:07:47,372 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-09-04 22:07:47,372 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-09-04 22:07:47,373 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-09-04 22:07:47,373 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-09-04 22:07:47,373 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-09-04 22:07:47,373 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-09-04 22:07:47,373 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-09-04 22:07:47,374 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-09-04 22:07:47,374 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-09-04 22:07:47,374 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-09-04 22:07:47,374 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-09-04 22:07:47,374 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-04 22:07:47,374 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-04 22:07:47,375 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-09-04 22:07:47,375 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-04 22:07:47,375 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-09-04 22:07:47,375 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-09-04 22:07:47,375 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-09-04 22:07:47,376 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-09-04 22:07:47,376 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-09-04 22:07:47,376 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-04 22:07:47,376 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-09-04 22:07:47,376 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-09-04 22:07:47,376 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-09-04 22:07:47,377 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-04 22:07:47,377 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-09-04 22:07:47,377 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-09-04 22:07:47,377 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-09-04 22:07:47,377 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-09-04 22:07:47,377 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-09-04 22:07:47,378 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-09-04 22:07:47,378 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-09-04 22:07:47,379 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-09-04 22:07:47,379 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-09-04 22:07:47,379 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-09-04 22:07:47,379 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-09-04 22:07:47,379 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-09-04 22:07:47,380 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-09-04 22:07:47,380 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-09-04 22:07:47,381 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-09-04 22:07:47,381 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-09-04 22:07:47,381 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-09-04 22:07:47,381 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-09-04 22:07:47,381 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-09-04 22:07:47,382 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-09-04 22:07:47,383 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-09-04 22:07:47,383 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-09-04 22:07:47,383 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-09-04 22:07:47,383 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-09-04 22:07:47,384 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-09-04 22:07:47,384 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-09-04 22:07:47,384 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-09-04 22:07:47,384 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-09-04 22:07:47,385 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-09-04 22:07:47,385 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-09-04 22:07:47,385 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-09-04 22:07:47,385 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-09-04 22:07:47,385 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-09-04 22:07:47,386 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-09-04 22:07:47,386 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-09-04 22:07:47,386 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-09-04 22:07:47,386 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-09-04 22:07:47,386 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-09-04 22:07:47,386 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-09-04 22:07:47,387 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 22:07:47,387 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 22:07:47,387 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 22:07:47,387 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-04 22:07:47,387 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-04 22:07:47,387 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-04 22:07:47,387 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-04 22:07:47,388 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-04 22:07:47,388 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-04 22:07:47,388 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 22:07:47,388 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 22:07:47,982 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 22:07:47,982 INFO L295 CfgBuilder]: Removed 11 assume(true) statements. [2020-09-04 22:07:47,988 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 10:07:47 BoogieIcfgContainer [2020-09-04 22:07:47,988 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 22:07:47,989 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 22:07:47,989 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 22:07:47,993 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 22:07:47,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 10:07:46" (1/3) ... [2020-09-04 22:07:47,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@145acbcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 10:07:47, skipping insertion in model container [2020-09-04 22:07:47,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:07:47" (2/3) ... [2020-09-04 22:07:47,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@145acbcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 10:07:47, skipping insertion in model container [2020-09-04 22:07:47,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 10:07:47" (3/3) ... [2020-09-04 22:07:47,997 INFO L109 eAbstractionObserver]: Analyzing ICFG sll-rb-sentinel-2.i [2020-09-04 22:07:48,009 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 22:07:48,019 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2020-09-04 22:07:48,042 INFO L251 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-09-04 22:07:48,071 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 22:07:48,071 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 22:07:48,072 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-04 22:07:48,072 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 22:07:48,072 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 22:07:48,072 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 22:07:48,072 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 22:07:48,072 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 22:07:48,093 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states. [2020-09-04 22:07:48,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-04 22:07:48,113 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:07:48,115 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] [2020-09-04 22:07:48,116 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:07:48,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:07:48,124 INFO L82 PathProgramCache]: Analyzing trace with hash -159181327, now seen corresponding path program 1 times [2020-09-04 22:07:48,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:07:48,137 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [333333477] [2020-09-04 22:07:48,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:07:48,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:07:48,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:07:48,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:07:48,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:07:48,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [333333477] [2020-09-04 22:07:48,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 22:07:48,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 22:07:48,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986227255] [2020-09-04 22:07:48,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 22:07:48,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:07:48,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 22:07:48,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 22:07:48,426 INFO L87 Difference]: Start difference. First operand 98 states. Second operand 3 states. [2020-09-04 22:07:48,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:07:48,687 INFO L93 Difference]: Finished difference Result 157 states and 194 transitions. [2020-09-04 22:07:48,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 22:07:48,689 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-09-04 22:07:48,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:07:48,703 INFO L225 Difference]: With dead ends: 157 [2020-09-04 22:07:48,704 INFO L226 Difference]: Without dead ends: 74 [2020-09-04 22:07:48,709 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 [2020-09-04 22:07:48,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-09-04 22:07:48,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-09-04 22:07:48,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-04 22:07:48,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2020-09-04 22:07:48,767 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 21 [2020-09-04 22:07:48,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:07:48,767 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2020-09-04 22:07:48,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 22:07:48,768 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2020-09-04 22:07:48,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-04 22:07:48,769 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:07:48,769 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] [2020-09-04 22:07:48,769 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 22:07:48,770 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:07:48,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:07:48,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1476818129, now seen corresponding path program 1 times [2020-09-04 22:07:48,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:07:48,771 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [947608665] [2020-09-04 22:07:48,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:07:48,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:07:48,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:07:48,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:07:48,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:07:48,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [947608665] [2020-09-04 22:07:48,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 22:07:48,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-04 22:07:48,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439752783] [2020-09-04 22:07:48,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-04 22:07:48,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:07:48,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-04 22:07:48,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-04 22:07:48,999 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand 8 states. [2020-09-04 22:07:49,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:07:49,295 INFO L93 Difference]: Finished difference Result 92 states and 97 transitions. [2020-09-04 22:07:49,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-04 22:07:49,297 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-09-04 22:07:49,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:07:49,299 INFO L225 Difference]: With dead ends: 92 [2020-09-04 22:07:49,299 INFO L226 Difference]: Without dead ends: 90 [2020-09-04 22:07:49,301 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 [2020-09-04 22:07:49,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-04 22:07:49,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 72. [2020-09-04 22:07:49,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-04 22:07:49,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2020-09-04 22:07:49,320 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 23 [2020-09-04 22:07:49,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:07:49,321 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2020-09-04 22:07:49,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-04 22:07:49,321 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2020-09-04 22:07:49,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-04 22:07:49,325 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:07:49,325 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] [2020-09-04 22:07:49,325 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 22:07:49,326 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:07:49,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:07:49,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1518762392, now seen corresponding path program 1 times [2020-09-04 22:07:49,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:07:49,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [428533654] [2020-09-04 22:07:49,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:07:49,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:07:49,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:07:49,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:07:49,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:07:49,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [428533654] [2020-09-04 22:07:49,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 22:07:49,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-04 22:07:49,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314182000] [2020-09-04 22:07:49,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-04 22:07:49,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:07:49,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-04 22:07:49,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-04 22:07:49,565 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand 9 states. [2020-09-04 22:07:49,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:07:49,952 INFO L93 Difference]: Finished difference Result 120 states and 126 transitions. [2020-09-04 22:07:49,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-04 22:07:49,953 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-09-04 22:07:49,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:07:49,955 INFO L225 Difference]: With dead ends: 120 [2020-09-04 22:07:49,955 INFO L226 Difference]: Without dead ends: 117 [2020-09-04 22:07:49,956 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 [2020-09-04 22:07:49,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-04 22:07:49,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 81. [2020-09-04 22:07:49,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-04 22:07:49,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2020-09-04 22:07:49,980 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 27 [2020-09-04 22:07:49,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:07:49,980 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2020-09-04 22:07:49,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-04 22:07:49,980 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2020-09-04 22:07:49,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-04 22:07:49,982 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:07:49,982 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] [2020-09-04 22:07:49,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 22:07:49,982 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:07:49,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:07:49,983 INFO L82 PathProgramCache]: Analyzing trace with hash 2047332937, now seen corresponding path program 1 times [2020-09-04 22:07:49,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:07:49,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267872079] [2020-09-04 22:07:49,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:07:50,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:07:50,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:07:50,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:07:50,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:07:50,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1267872079] [2020-09-04 22:07:50,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 22:07:50,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-04 22:07:50,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085095058] [2020-09-04 22:07:50,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-04 22:07:50,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:07:50,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-04 22:07:50,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-04 22:07:50,175 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand 6 states. [2020-09-04 22:07:50,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:07:50,408 INFO L93 Difference]: Finished difference Result 114 states and 120 transitions. [2020-09-04 22:07:50,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 22:07:50,408 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 36 [2020-09-04 22:07:50,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:07:50,410 INFO L225 Difference]: With dead ends: 114 [2020-09-04 22:07:50,410 INFO L226 Difference]: Without dead ends: 92 [2020-09-04 22:07:50,411 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 [2020-09-04 22:07:50,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-04 22:07:50,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 84. [2020-09-04 22:07:50,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-04 22:07:50,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2020-09-04 22:07:50,431 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 36 [2020-09-04 22:07:50,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:07:50,432 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2020-09-04 22:07:50,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-04 22:07:50,432 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2020-09-04 22:07:50,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-04 22:07:50,434 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:07:50,434 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] [2020-09-04 22:07:50,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 22:07:50,435 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:07:50,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:07:50,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1237644091, now seen corresponding path program 1 times [2020-09-04 22:07:50,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:07:50,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1838202827] [2020-09-04 22:07:50,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:07:50,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:07:50,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:07:50,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:07:50,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:07:50,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1838202827] [2020-09-04 22:07:50,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 22:07:50,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-04 22:07:50,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075908733] [2020-09-04 22:07:50,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-04 22:07:50,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:07:50,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-04 22:07:50,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-09-04 22:07:50,925 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand 16 states. [2020-09-04 22:07:51,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:07:51,890 INFO L93 Difference]: Finished difference Result 155 states and 162 transitions. [2020-09-04 22:07:51,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-04 22:07:51,891 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-09-04 22:07:51,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:07:51,893 INFO L225 Difference]: With dead ends: 155 [2020-09-04 22:07:51,893 INFO L226 Difference]: Without dead ends: 152 [2020-09-04 22:07:51,900 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2020-09-04 22:07:51,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-09-04 22:07:51,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 97. [2020-09-04 22:07:51,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-09-04 22:07:51,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 103 transitions. [2020-09-04 22:07:51,936 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 103 transitions. Word has length 40 [2020-09-04 22:07:51,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:07:51,939 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 103 transitions. [2020-09-04 22:07:51,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-04 22:07:51,939 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 103 transitions. [2020-09-04 22:07:51,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-04 22:07:51,943 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:07:51,943 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] [2020-09-04 22:07:51,943 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-04 22:07:51,944 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:07:51,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:07:51,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1411163060, now seen corresponding path program 1 times [2020-09-04 22:07:51,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:07:51,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [498532588] [2020-09-04 22:07:51,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:07:51,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:07:52,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:07:52,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:07:52,083 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:07:52,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [498532588] [2020-09-04 22:07:52,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 22:07:52,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-04 22:07:52,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137939219] [2020-09-04 22:07:52,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 22:07:52,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:07:52,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 22:07:52,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-04 22:07:52,089 INFO L87 Difference]: Start difference. First operand 97 states and 103 transitions. Second operand 7 states. [2020-09-04 22:07:52,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:07:52,368 INFO L93 Difference]: Finished difference Result 136 states and 143 transitions. [2020-09-04 22:07:52,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-04 22:07:52,368 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 43 [2020-09-04 22:07:52,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:07:52,370 INFO L225 Difference]: With dead ends: 136 [2020-09-04 22:07:52,370 INFO L226 Difference]: Without dead ends: 97 [2020-09-04 22:07:52,371 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-09-04 22:07:52,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-04 22:07:52,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-09-04 22:07:52,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-09-04 22:07:52,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 102 transitions. [2020-09-04 22:07:52,397 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 102 transitions. Word has length 43 [2020-09-04 22:07:52,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:07:52,397 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 102 transitions. [2020-09-04 22:07:52,397 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 22:07:52,398 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 102 transitions. [2020-09-04 22:07:52,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-09-04 22:07:52,405 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:07:52,406 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] [2020-09-04 22:07:52,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-04 22:07:52,406 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:07:52,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:07:52,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1215747511, now seen corresponding path program 1 times [2020-09-04 22:07:52,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:07:52,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [942443163] [2020-09-04 22:07:52,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:07:52,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:07:53,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:07:53,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:07:53,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:07:53,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [942443163] [2020-09-04 22:07:53,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 22:07:53,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-04 22:07:53,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429846963] [2020-09-04 22:07:53,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-04 22:07:53,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:07:53,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-04 22:07:53,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-09-04 22:07:53,216 INFO L87 Difference]: Start difference. First operand 97 states and 102 transitions. Second operand 20 states. [2020-09-04 22:07:54,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:07:54,406 INFO L93 Difference]: Finished difference Result 163 states and 170 transitions. [2020-09-04 22:07:54,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-04 22:07:54,410 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 47 [2020-09-04 22:07:54,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:07:54,412 INFO L225 Difference]: With dead ends: 163 [2020-09-04 22:07:54,413 INFO L226 Difference]: Without dead ends: 160 [2020-09-04 22:07:54,415 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=353, Invalid=1129, Unknown=0, NotChecked=0, Total=1482 [2020-09-04 22:07:54,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-09-04 22:07:54,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 106. [2020-09-04 22:07:54,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-09-04 22:07:54,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 111 transitions. [2020-09-04 22:07:54,462 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 111 transitions. Word has length 47 [2020-09-04 22:07:54,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:07:54,465 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 111 transitions. [2020-09-04 22:07:54,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-04 22:07:54,465 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 111 transitions. [2020-09-04 22:07:54,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-04 22:07:54,467 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:07:54,467 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] [2020-09-04 22:07:54,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-04 22:07:54,467 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:07:54,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:07:54,468 INFO L82 PathProgramCache]: Analyzing trace with hash 231328440, now seen corresponding path program 2 times [2020-09-04 22:07:54,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:07:54,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2002009412] [2020-09-04 22:07:54,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:07:54,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:07:55,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:07:55,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:07:55,202 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:07:55,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2002009412] [2020-09-04 22:07:55,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 22:07:55,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-04 22:07:55,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734742390] [2020-09-04 22:07:55,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-04 22:07:55,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:07:55,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-04 22:07:55,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2020-09-04 22:07:55,205 INFO L87 Difference]: Start difference. First operand 106 states and 111 transitions. Second operand 20 states. [2020-09-04 22:07:56,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:07:56,412 INFO L93 Difference]: Finished difference Result 179 states and 188 transitions. [2020-09-04 22:07:56,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-04 22:07:56,413 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 53 [2020-09-04 22:07:56,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:07:56,415 INFO L225 Difference]: With dead ends: 179 [2020-09-04 22:07:56,415 INFO L226 Difference]: Without dead ends: 176 [2020-09-04 22:07:56,416 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=310, Invalid=950, Unknown=0, NotChecked=0, Total=1260 [2020-09-04 22:07:56,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-09-04 22:07:56,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 117. [2020-09-04 22:07:56,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-09-04 22:07:56,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 124 transitions. [2020-09-04 22:07:56,437 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 124 transitions. Word has length 53 [2020-09-04 22:07:56,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:07:56,437 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 124 transitions. [2020-09-04 22:07:56,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-04 22:07:56,438 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 124 transitions. [2020-09-04 22:07:56,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-09-04 22:07:56,439 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:07:56,439 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] [2020-09-04 22:07:56,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-04 22:07:56,439 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:07:56,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:07:56,440 INFO L82 PathProgramCache]: Analyzing trace with hash -2144912159, now seen corresponding path program 1 times [2020-09-04 22:07:56,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:07:56,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1877770724] [2020-09-04 22:07:56,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:07:56,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:07:56,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:07:56,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:07:56,975 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:07:56,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1877770724] [2020-09-04 22:07:56,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 22:07:56,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-04 22:07:56,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920022146] [2020-09-04 22:07:56,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-04 22:07:56,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:07:56,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-04 22:07:56,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2020-09-04 22:07:56,978 INFO L87 Difference]: Start difference. First operand 117 states and 124 transitions. Second operand 22 states. [2020-09-04 22:07:58,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:07:58,944 INFO L93 Difference]: Finished difference Result 197 states and 208 transitions. [2020-09-04 22:07:58,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-04 22:07:58,944 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 56 [2020-09-04 22:07:58,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:07:58,946 INFO L225 Difference]: With dead ends: 197 [2020-09-04 22:07:58,946 INFO L226 Difference]: Without dead ends: 175 [2020-09-04 22:07:58,947 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=390, Invalid=1680, Unknown=0, NotChecked=0, Total=2070 [2020-09-04 22:07:58,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-09-04 22:07:58,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 137. [2020-09-04 22:07:58,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-09-04 22:07:58,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 145 transitions. [2020-09-04 22:07:58,973 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 145 transitions. Word has length 56 [2020-09-04 22:07:58,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:07:58,974 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 145 transitions. [2020-09-04 22:07:58,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-04 22:07:58,974 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 145 transitions. [2020-09-04 22:07:58,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-04 22:07:58,975 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:07:58,975 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] [2020-09-04 22:07:58,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-04 22:07:58,976 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:07:58,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:07:58,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1025074422, now seen corresponding path program 1 times [2020-09-04 22:07:58,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:07:58,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [767388198] [2020-09-04 22:07:58,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:07:59,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:07:59,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:07:59,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:07:59,750 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-04 22:07:59,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [767388198] [2020-09-04 22:07:59,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 22:07:59,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-04 22:07:59,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845028592] [2020-09-04 22:07:59,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-04 22:07:59,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:07:59,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-04 22:07:59,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-09-04 22:07:59,753 INFO L87 Difference]: Start difference. First operand 137 states and 145 transitions. Second operand 22 states. [2020-09-04 22:08:01,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:08:01,213 INFO L93 Difference]: Finished difference Result 148 states and 156 transitions. [2020-09-04 22:08:01,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-04 22:08:01,214 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 60 [2020-09-04 22:08:01,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:08:01,215 INFO L225 Difference]: With dead ends: 148 [2020-09-04 22:08:01,215 INFO L226 Difference]: Without dead ends: 145 [2020-09-04 22:08:01,217 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=446, Invalid=1360, Unknown=0, NotChecked=0, Total=1806 [2020-09-04 22:08:01,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-09-04 22:08:01,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 103. [2020-09-04 22:08:01,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-09-04 22:08:01,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 108 transitions. [2020-09-04 22:08:01,237 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 108 transitions. Word has length 60 [2020-09-04 22:08:01,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:08:01,237 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 108 transitions. [2020-09-04 22:08:01,237 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-04 22:08:01,237 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 108 transitions. [2020-09-04 22:08:01,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-09-04 22:08:01,238 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:08:01,238 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] [2020-09-04 22:08:01,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-04 22:08:01,239 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:08:01,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:08:01,239 INFO L82 PathProgramCache]: Analyzing trace with hash -412836324, now seen corresponding path program 2 times [2020-09-04 22:08:01,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:08:01,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [263050094] [2020-09-04 22:08:01,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:08:01,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:08:01,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:08:01,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:08:01,572 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:08:01,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [263050094] [2020-09-04 22:08:01,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 22:08:01,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-04 22:08:01,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605567807] [2020-09-04 22:08:01,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-04 22:08:01,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:08:01,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-04 22:08:01,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2020-09-04 22:08:01,574 INFO L87 Difference]: Start difference. First operand 103 states and 108 transitions. Second operand 17 states. [2020-09-04 22:08:02,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:08:02,735 INFO L93 Difference]: Finished difference Result 147 states and 153 transitions. [2020-09-04 22:08:02,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-04 22:08:02,736 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 63 [2020-09-04 22:08:02,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:08:02,737 INFO L225 Difference]: With dead ends: 147 [2020-09-04 22:08:02,737 INFO L226 Difference]: Without dead ends: 101 [2020-09-04 22:08:02,738 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 [2020-09-04 22:08:02,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-04 22:08:02,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 87. [2020-09-04 22:08:02,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-04 22:08:02,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2020-09-04 22:08:02,755 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 63 [2020-09-04 22:08:02,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:08:02,755 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2020-09-04 22:08:02,755 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-04 22:08:02,755 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2020-09-04 22:08:02,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-09-04 22:08:02,756 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:08:02,756 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] [2020-09-04 22:08:02,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-04 22:08:02,757 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:08:02,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:08:02,757 INFO L82 PathProgramCache]: Analyzing trace with hash -80620955, now seen corresponding path program 1 times [2020-09-04 22:08:02,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:08:02,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2024071838] [2020-09-04 22:08:02,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:08:02,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:08:03,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:08:03,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:08:03,979 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:08:03,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2024071838] [2020-09-04 22:08:03,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 22:08:03,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-09-04 22:08:03,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362622674] [2020-09-04 22:08:03,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-04 22:08:03,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:08:03,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-04 22:08:03,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2020-09-04 22:08:03,981 INFO L87 Difference]: Start difference. First operand 87 states and 91 transitions. Second operand 25 states. [2020-09-04 22:08:04,638 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2020-09-04 22:08:04,938 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2020-09-04 22:08:05,099 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2020-09-04 22:08:05,404 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2020-09-04 22:08:05,752 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 70 [2020-09-04 22:08:05,979 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 64 [2020-09-04 22:08:06,328 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 73 [2020-09-04 22:08:06,530 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2020-09-04 22:08:06,731 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2020-09-04 22:08:06,939 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2020-09-04 22:08:07,448 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-09-04 22:08:08,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:08:08,879 INFO L93 Difference]: Finished difference Result 172 states and 179 transitions. [2020-09-04 22:08:08,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-04 22:08:08,879 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 63 [2020-09-04 22:08:08,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:08:08,881 INFO L225 Difference]: With dead ends: 172 [2020-09-04 22:08:08,881 INFO L226 Difference]: Without dead ends: 170 [2020-09-04 22:08:08,883 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=480, Invalid=2490, Unknown=0, NotChecked=0, Total=2970 [2020-09-04 22:08:08,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-09-04 22:08:08,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 122. [2020-09-04 22:08:08,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-09-04 22:08:08,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 128 transitions. [2020-09-04 22:08:08,918 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 128 transitions. Word has length 63 [2020-09-04 22:08:08,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:08:08,918 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 128 transitions. [2020-09-04 22:08:08,918 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-04 22:08:08,918 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 128 transitions. [2020-09-04 22:08:08,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-04 22:08:08,919 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:08:08,919 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] [2020-09-04 22:08:08,920 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-04 22:08:08,922 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:08:08,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:08:08,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1761981780, now seen corresponding path program 1 times [2020-09-04 22:08:08,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:08:08,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [745884790] [2020-09-04 22:08:08,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:08:08,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 22:08:08,978 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 22:08:09,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 22:08:09,017 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 22:08:09,072 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-04 22:08:09,073 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 22:08:09,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-04 22:08:09,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 10:08:09 BoogieIcfgContainer [2020-09-04 22:08:09,149 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 22:08:09,151 INFO L168 Benchmark]: Toolchain (without parser) took 22655.71 ms. Allocated memory was 146.3 MB in the beginning and 437.8 MB in the end (delta: 291.5 MB). Free memory was 102.2 MB in the beginning and 297.6 MB in the end (delta: -195.4 MB). Peak memory consumption was 96.1 MB. Max. memory is 7.1 GB. [2020-09-04 22:08:09,152 INFO L168 Benchmark]: CDTParser took 0.89 ms. Allocated memory is still 146.3 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-04 22:08:09,153 INFO L168 Benchmark]: CACSL2BoogieTranslator took 700.67 ms. Allocated memory was 146.3 MB in the beginning and 203.9 MB in the end (delta: 57.7 MB). Free memory was 102.0 MB in the beginning and 171.3 MB in the end (delta: -69.3 MB). Peak memory consumption was 23.0 MB. Max. memory is 7.1 GB. [2020-09-04 22:08:09,154 INFO L168 Benchmark]: Boogie Preprocessor took 78.47 ms. Allocated memory is still 203.9 MB. Free memory was 171.3 MB in the beginning and 167.9 MB in the end (delta: 3.5 MB). Peak memory consumption was 3.5 MB. Max. memory is 7.1 GB. [2020-09-04 22:08:09,155 INFO L168 Benchmark]: RCFGBuilder took 710.94 ms. Allocated memory is still 203.9 MB. Free memory was 167.9 MB in the beginning and 116.5 MB in the end (delta: 51.4 MB). Peak memory consumption was 51.4 MB. Max. memory is 7.1 GB. [2020-09-04 22:08:09,156 INFO L168 Benchmark]: TraceAbstraction took 21160.27 ms. Allocated memory was 203.9 MB in the beginning and 437.8 MB in the end (delta: 233.8 MB). Free memory was 115.8 MB in the beginning and 297.6 MB in the end (delta: -181.7 MB). Peak memory consumption was 52.1 MB. Max. memory is 7.1 GB. [2020-09-04 22:08:09,162 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.89 ms. Allocated memory is still 146.3 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 700.67 ms. Allocated memory was 146.3 MB in the beginning and 203.9 MB in the end (delta: 57.7 MB). Free memory was 102.0 MB in the beginning and 171.3 MB in the end (delta: -69.3 MB). Peak memory consumption was 23.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 78.47 ms. Allocated memory is still 203.9 MB. Free memory was 171.3 MB in the beginning and 167.9 MB in the end (delta: 3.5 MB). Peak memory consumption was 3.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 710.94 ms. Allocated memory is still 203.9 MB. Free memory was 167.9 MB in the beginning and 116.5 MB in the end (delta: 51.4 MB). Peak memory consumption was 51.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 21160.27 ms. Allocated memory was 203.9 MB in the beginning and 437.8 MB in the end (delta: 233.8 MB). Free memory was 115.8 MB in the beginning and 297.6 MB in the end (delta: -181.7 MB). Peak memory consumption was 52.1 MB. 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))={-1:0}, malloc(sizeof(SLL))={-2:0}, null={-1:0}] [L999] list->next = null VAL [list={-2:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}, 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))={-1:0}, malloc(sizeof(SLL))={-2:0}, null={-1:0}] [L1005] COND TRUE __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=1, end={-2:0}, list={-2:0}, malloc(sizeof(SLL))={-1:0}, malloc(sizeof(SLL))={-2:0}, 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))={-1:0}, malloc(sizeof(SLL))={-2:0}, 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))={-1:0}, malloc(sizeof(SLL))={-2:0}, 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))={-1:0}, malloc(sizeof(SLL))={-2:0}, 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))={-1:0}, malloc(sizeof(SLL))={-2:0}, 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))={-1:0}, malloc(sizeof(SLL))={-2:0}, 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))={-1:0}, malloc(sizeof(SLL))={-2:0}, 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))={-1:0}, malloc(sizeof(SLL))={-2:0}, 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))={-1:0}, malloc(sizeof(SLL))={-2:0}, 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))={-1:0}, malloc(sizeof(SLL))={-2:0}, 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))={-1:0}, malloc(sizeof(SLL))={-2:0}, 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))={-1:0}, malloc(sizeof(SLL))={-2:0}, 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))={-1:0}, malloc(sizeof(SLL))={-2:0}, 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))={-1:0}, malloc(sizeof(SLL))={-2:0}, 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: 21.0s, OverallIterations: 13, TraceHistogramMax: 3, AutomataDifference: 14.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 724 SDtfs, 4258 SDslu, 4191 SDs, 0 SdLazy, 4599 SolverSat, 790 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 363 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 309 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1740 ImplicationChecksByTransitivity, 12.1s 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: 0.3s AutomataMinimizationTime, 12 MinimizatonAttempts, 372 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 5.2s InterpolantComputationTime, 599 NumberOfCodeBlocks, 599 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 520 ConstructedInterpolants, 0 QuantifiedInterpolants, 378343 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...