/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/forester-heap/sll-rb-sentinel-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-24 01:09:02,278 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 01:09:02,282 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 01:09:02,322 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-24 01:09:02,323 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-24 01:09:02,324 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-24 01:09:02,326 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-24 01:09:02,329 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-24 01:09:02,331 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-24 01:09:02,333 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-24 01:09:02,334 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-24 01:09:02,335 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-24 01:09:02,336 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 01:09:02,337 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 01:09:02,339 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 01:09:02,340 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 01:09:02,341 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 01:09:02,343 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 01:09:02,360 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 01:09:02,366 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 01:09:02,368 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 01:09:02,369 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 01:09:02,371 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 01:09:02,372 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 01:09:02,375 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-24 01:09:02,376 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-24 01:09:02,376 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-24 01:09:02,377 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-24 01:09:02,378 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-24 01:09:02,379 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-24 01:09:02,379 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-24 01:09:02,380 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-24 01:09:02,381 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-24 01:09:02,382 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-24 01:09:02,384 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-24 01:09:02,384 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-24 01:09:02,385 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-24 01:09:02,386 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-24 01:09:02,386 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-24 01:09:02,387 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-24 01:09:02,388 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-24 01:09:02,391 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-24 01:09:02,406 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 01:09:02,407 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 01:09:02,409 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 01:09:02,409 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 01:09:02,410 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-24 01:09:02,410 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 01:09:02,410 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 01:09:02,411 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 01:09:02,411 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 01:09:02,411 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 01:09:02,411 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 01:09:02,412 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 01:09:02,412 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 01:09:02,412 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 01:09:02,413 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 01:09:02,413 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-24 01:09:02,413 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 01:09:02,414 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 01:09:02,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 01:09:02,414 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 01:09:02,415 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-24 01:09:02,415 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 01:09:02,415 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-10-24 01:09:02,884 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 01:09:02,934 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 01:09:02,937 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 01:09:02,938 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 01:09:02,939 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 01:09:02,940 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-rb-sentinel-2.i [2020-10-24 01:09:03,037 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e9c80171/76375a124c7a42bf99f9098ee75b62bf/FLAG1a976ff73 [2020-10-24 01:09:03,781 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 01:09:03,781 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/sll-rb-sentinel-2.i [2020-10-24 01:09:03,795 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e9c80171/76375a124c7a42bf99f9098ee75b62bf/FLAG1a976ff73 [2020-10-24 01:09:04,081 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e9c80171/76375a124c7a42bf99f9098ee75b62bf [2020-10-24 01:09:04,084 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 01:09:04,092 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-24 01:09:04,094 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 01:09:04,094 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 01:09:04,098 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 01:09:04,099 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 01:09:04" (1/1) ... [2020-10-24 01:09:04,103 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5961ee98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:09:04, skipping insertion in model container [2020-10-24 01:09:04,103 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 01:09:04" (1/1) ... [2020-10-24 01:09:04,113 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 01:09:04,153 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-24 01:09:04,537 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 01:09:04,548 INFO L203 MainTranslator]: Completed pre-run [2020-10-24 01:09:04,593 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 01:09:04,649 INFO L208 MainTranslator]: Completed translation [2020-10-24 01:09:04,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:09:04 WrapperNode [2020-10-24 01:09:04,650 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 01:09:04,651 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 01:09:04,651 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 01:09:04,651 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 01:09:04,664 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:09:04" (1/1) ... [2020-10-24 01:09:04,665 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:09:04" (1/1) ... [2020-10-24 01:09:04,681 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:09:04" (1/1) ... [2020-10-24 01:09:04,681 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:09:04" (1/1) ... [2020-10-24 01:09:04,716 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:09:04" (1/1) ... [2020-10-24 01:09:04,726 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:09:04" (1/1) ... [2020-10-24 01:09:04,732 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:09:04" (1/1) ... [2020-10-24 01:09:04,747 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 01:09:04,749 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 01:09:04,750 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 01:09:04,750 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 01:09:04,754 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:09:04" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 01:09:04,832 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-24 01:09:04,832 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 01:09:04,833 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-24 01:09:04,833 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-24 01:09:04,833 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-24 01:09:04,834 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-24 01:09:04,834 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-24 01:09:04,834 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-24 01:09:04,834 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-24 01:09:04,834 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-24 01:09:04,835 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-24 01:09:04,835 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-24 01:09:04,836 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-24 01:09:04,836 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-24 01:09:04,836 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-24 01:09:04,836 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-24 01:09:04,837 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-24 01:09:04,838 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-24 01:09:04,839 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-24 01:09:04,840 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-24 01:09:04,840 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-24 01:09:04,840 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-24 01:09:04,843 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-24 01:09:04,844 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-24 01:09:04,844 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-24 01:09:04,844 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-24 01:09:04,844 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-24 01:09:04,844 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-24 01:09:04,845 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-24 01:09:04,845 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-24 01:09:04,845 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-24 01:09:04,845 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-24 01:09:04,845 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-24 01:09:04,850 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-24 01:09:04,850 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-24 01:09:04,850 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-24 01:09:04,850 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-24 01:09:04,850 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-24 01:09:04,850 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-24 01:09:04,850 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-24 01:09:04,851 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-24 01:09:04,851 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-24 01:09:04,851 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-24 01:09:04,851 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-24 01:09:04,851 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-24 01:09:04,851 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-24 01:09:04,851 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-24 01:09:04,851 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-24 01:09:04,851 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-24 01:09:04,852 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-24 01:09:04,852 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-24 01:09:04,852 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-24 01:09:04,852 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-24 01:09:04,852 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-24 01:09:04,852 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-24 01:09:04,852 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-24 01:09:04,852 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-24 01:09:04,852 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-24 01:09:04,852 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-24 01:09:04,853 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-24 01:09:04,853 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-24 01:09:04,853 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-24 01:09:04,853 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-24 01:09:04,853 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-24 01:09:04,853 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-24 01:09:04,853 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-24 01:09:04,853 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-24 01:09:04,854 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-24 01:09:04,854 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-24 01:09:04,854 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-24 01:09:04,854 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-24 01:09:04,854 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-24 01:09:04,854 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-24 01:09:04,854 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-24 01:09:04,854 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-24 01:09:04,855 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-24 01:09:04,855 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-24 01:09:04,855 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-24 01:09:04,855 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-24 01:09:04,855 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-24 01:09:04,855 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-24 01:09:04,855 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-24 01:09:04,855 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-24 01:09:04,856 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-24 01:09:04,856 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-24 01:09:04,856 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-24 01:09:04,856 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-24 01:09:04,856 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-24 01:09:04,856 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-24 01:09:04,856 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-24 01:09:04,857 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-24 01:09:04,857 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-24 01:09:04,858 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-24 01:09:04,858 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-24 01:09:04,858 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-24 01:09:04,858 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-24 01:09:04,858 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-24 01:09:04,859 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-24 01:09:04,859 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-24 01:09:04,859 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-24 01:09:04,859 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-24 01:09:04,859 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-24 01:09:04,859 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-24 01:09:04,859 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-24 01:09:04,860 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-24 01:09:04,860 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-24 01:09:04,860 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-24 01:09:04,860 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-24 01:09:04,860 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-24 01:09:04,860 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-24 01:09:04,860 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-24 01:09:04,860 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-24 01:09:04,861 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 01:09:04,861 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-24 01:09:04,861 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-24 01:09:04,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-24 01:09:04,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-24 01:09:04,861 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-24 01:09:04,861 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-24 01:09:04,861 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-24 01:09:04,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-24 01:09:04,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-24 01:09:04,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 01:09:05,528 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 01:09:05,528 INFO L298 CfgBuilder]: Removed 11 assume(true) statements. [2020-10-24 01:09:05,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 01:09:05 BoogieIcfgContainer [2020-10-24 01:09:05,531 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 01:09:05,533 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 01:09:05,533 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 01:09:05,537 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 01:09:05,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 01:09:04" (1/3) ... [2020-10-24 01:09:05,538 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6504a5ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 01:09:05, skipping insertion in model container [2020-10-24 01:09:05,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:09:04" (2/3) ... [2020-10-24 01:09:05,539 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6504a5ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 01:09:05, skipping insertion in model container [2020-10-24 01:09:05,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 01:09:05" (3/3) ... [2020-10-24 01:09:05,541 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-rb-sentinel-2.i [2020-10-24 01:09:05,555 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-24 01:09:05,561 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 01:09:05,577 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 01:09:05,604 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 01:09:05,604 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 01:09:05,604 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-24 01:09:05,604 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 01:09:05,605 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 01:09:05,605 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 01:09:05,605 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 01:09:05,605 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 01:09:05,625 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states. [2020-10-24 01:09:05,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-24 01:09:05,636 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:09:05,637 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] [2020-10-24 01:09:05,638 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:09:05,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:09:05,645 INFO L82 PathProgramCache]: Analyzing trace with hash -539929583, now seen corresponding path program 1 times [2020-10-24 01:09:05,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:09:05,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1197756042] [2020-10-24 01:09:05,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:09:05,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:09:05,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:09:06,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:09:06,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 01:09:06,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1197756042] [2020-10-24 01:09:06,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 01:09:06,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-24 01:09:06,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246218158] [2020-10-24 01:09:06,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-24 01:09:06,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:09:06,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-24 01:09:06,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-24 01:09:06,063 INFO L87 Difference]: Start difference. First operand 108 states. Second operand 3 states. [2020-10-24 01:09:06,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:09:06,328 INFO L93 Difference]: Finished difference Result 166 states and 212 transitions. [2020-10-24 01:09:06,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-24 01:09:06,330 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-10-24 01:09:06,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:09:06,341 INFO L225 Difference]: With dead ends: 166 [2020-10-24 01:09:06,341 INFO L226 Difference]: Without dead ends: 77 [2020-10-24 01:09:06,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-24 01:09:06,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-24 01:09:06,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-10-24 01:09:06,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-24 01:09:06,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 83 transitions. [2020-10-24 01:09:06,402 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 83 transitions. Word has length 27 [2020-10-24 01:09:06,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:09:06,403 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 83 transitions. [2020-10-24 01:09:06,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-24 01:09:06,404 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 83 transitions. [2020-10-24 01:09:06,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-24 01:09:06,405 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:09:06,405 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 01:09:06,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-24 01:09:06,406 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:09:06,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:09:06,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1735173809, now seen corresponding path program 1 times [2020-10-24 01:09:06,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:09:06,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [72691816] [2020-10-24 01:09:06,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:09:06,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:09:06,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:09:06,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:09:06,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 01:09:06,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [72691816] [2020-10-24 01:09:06,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 01:09:06,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-24 01:09:06,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134624786] [2020-10-24 01:09:06,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-24 01:09:06,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:09:06,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-24 01:09:06,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-24 01:09:06,574 INFO L87 Difference]: Start difference. First operand 77 states and 83 transitions. Second operand 8 states. [2020-10-24 01:09:06,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:09:06,910 INFO L93 Difference]: Finished difference Result 98 states and 105 transitions. [2020-10-24 01:09:06,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-24 01:09:06,910 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-10-24 01:09:06,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:09:06,913 INFO L225 Difference]: With dead ends: 98 [2020-10-24 01:09:06,913 INFO L226 Difference]: Without dead ends: 94 [2020-10-24 01:09:06,914 INFO L677 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 [2020-10-24 01:09:06,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-24 01:09:06,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 76. [2020-10-24 01:09:06,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-24 01:09:06,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 81 transitions. [2020-10-24 01:09:06,964 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 81 transitions. Word has length 29 [2020-10-24 01:09:06,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:09:06,965 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 81 transitions. [2020-10-24 01:09:06,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-24 01:09:06,965 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 81 transitions. [2020-10-24 01:09:06,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-24 01:09:06,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:09:06,970 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 01:09:06,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-24 01:09:06,970 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:09:06,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:09:06,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1089544857, now seen corresponding path program 1 times [2020-10-24 01:09:06,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:09:06,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1493566783] [2020-10-24 01:09:06,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:09:07,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:09:07,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:09:07,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:09:07,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 01:09:07,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1493566783] [2020-10-24 01:09:07,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 01:09:07,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-24 01:09:07,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316541607] [2020-10-24 01:09:07,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-24 01:09:07,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:09:07,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-24 01:09:07,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-24 01:09:07,232 INFO L87 Difference]: Start difference. First operand 76 states and 81 transitions. Second operand 9 states. [2020-10-24 01:09:07,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:09:07,661 INFO L93 Difference]: Finished difference Result 124 states and 134 transitions. [2020-10-24 01:09:07,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-24 01:09:07,662 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2020-10-24 01:09:07,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:09:07,664 INFO L225 Difference]: With dead ends: 124 [2020-10-24 01:09:07,664 INFO L226 Difference]: Without dead ends: 119 [2020-10-24 01:09:07,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2020-10-24 01:09:07,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-24 01:09:07,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 85. [2020-10-24 01:09:07,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-24 01:09:07,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 91 transitions. [2020-10-24 01:09:07,694 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 91 transitions. Word has length 33 [2020-10-24 01:09:07,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:09:07,694 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 91 transitions. [2020-10-24 01:09:07,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-24 01:09:07,695 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 91 transitions. [2020-10-24 01:09:07,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-24 01:09:07,698 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:09:07,698 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 01:09:07,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-24 01:09:07,699 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:09:07,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:09:07,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1021117909, now seen corresponding path program 1 times [2020-10-24 01:09:07,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:09:07,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [747559031] [2020-10-24 01:09:07,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:09:07,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:09:07,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:09:07,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:09:07,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 01:09:07,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [747559031] [2020-10-24 01:09:07,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 01:09:07,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-24 01:09:07,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900578792] [2020-10-24 01:09:07,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-24 01:09:07,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:09:07,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-24 01:09:07,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-24 01:09:07,994 INFO L87 Difference]: Start difference. First operand 85 states and 91 transitions. Second operand 6 states. [2020-10-24 01:09:08,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:09:08,301 INFO L93 Difference]: Finished difference Result 119 states and 128 transitions. [2020-10-24 01:09:08,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-24 01:09:08,301 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 42 [2020-10-24 01:09:08,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:09:08,303 INFO L225 Difference]: With dead ends: 119 [2020-10-24 01:09:08,304 INFO L226 Difference]: Without dead ends: 96 [2020-10-24 01:09:08,304 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-24 01:09:08,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-24 01:09:08,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 88. [2020-10-24 01:09:08,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-24 01:09:08,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 94 transitions. [2020-10-24 01:09:08,323 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 94 transitions. Word has length 42 [2020-10-24 01:09:08,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:09:08,324 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 94 transitions. [2020-10-24 01:09:08,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-24 01:09:08,324 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 94 transitions. [2020-10-24 01:09:08,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-24 01:09:08,325 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:09:08,325 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] [2020-10-24 01:09:08,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-24 01:09:08,326 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:09:08,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:09:08,326 INFO L82 PathProgramCache]: Analyzing trace with hash -497830478, now seen corresponding path program 1 times [2020-10-24 01:09:08,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:09:08,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2032998197] [2020-10-24 01:09:08,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:09:08,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:09:08,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:09:08,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:09:08,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 01:09:08,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2032998197] [2020-10-24 01:09:08,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 01:09:08,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-24 01:09:08,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625328168] [2020-10-24 01:09:08,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-24 01:09:08,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:09:08,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-24 01:09:08,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-24 01:09:08,825 INFO L87 Difference]: Start difference. First operand 88 states and 94 transitions. Second operand 16 states. [2020-10-24 01:09:10,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:09:10,089 INFO L93 Difference]: Finished difference Result 159 states and 170 transitions. [2020-10-24 01:09:10,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-24 01:09:10,089 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 46 [2020-10-24 01:09:10,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:09:10,091 INFO L225 Difference]: With dead ends: 159 [2020-10-24 01:09:10,091 INFO L226 Difference]: Without dead ends: 154 [2020-10-24 01:09:10,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2020-10-24 01:09:10,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-24 01:09:10,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 101. [2020-10-24 01:09:10,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-24 01:09:10,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 109 transitions. [2020-10-24 01:09:10,120 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 109 transitions. Word has length 46 [2020-10-24 01:09:10,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:09:10,120 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 109 transitions. [2020-10-24 01:09:10,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-24 01:09:10,120 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 109 transitions. [2020-10-24 01:09:10,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-24 01:09:10,122 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:09:10,122 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 01:09:10,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-24 01:09:10,122 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:09:10,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:09:10,123 INFO L82 PathProgramCache]: Analyzing trace with hash 556208802, now seen corresponding path program 1 times [2020-10-24 01:09:10,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:09:10,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1258961546] [2020-10-24 01:09:10,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:09:10,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:09:10,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:09:10,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:09:10,237 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 01:09:10,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1258961546] [2020-10-24 01:09:10,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 01:09:10,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-24 01:09:10,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985233648] [2020-10-24 01:09:10,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-24 01:09:10,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:09:10,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-24 01:09:10,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-24 01:09:10,240 INFO L87 Difference]: Start difference. First operand 101 states and 109 transitions. Second operand 7 states. [2020-10-24 01:09:10,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:09:10,623 INFO L93 Difference]: Finished difference Result 141 states and 151 transitions. [2020-10-24 01:09:10,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-24 01:09:10,624 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 49 [2020-10-24 01:09:10,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:09:10,625 INFO L225 Difference]: With dead ends: 141 [2020-10-24 01:09:10,625 INFO L226 Difference]: Without dead ends: 101 [2020-10-24 01:09:10,626 INFO L677 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 [2020-10-24 01:09:10,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-24 01:09:10,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2020-10-24 01:09:10,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-24 01:09:10,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 108 transitions. [2020-10-24 01:09:10,651 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 108 transitions. Word has length 49 [2020-10-24 01:09:10,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:09:10,651 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 108 transitions. [2020-10-24 01:09:10,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-24 01:09:10,651 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 108 transitions. [2020-10-24 01:09:10,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-24 01:09:10,655 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:09:10,655 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 01:09:10,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-24 01:09:10,655 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:09:10,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:09:10,659 INFO L82 PathProgramCache]: Analyzing trace with hash 512658264, now seen corresponding path program 1 times [2020-10-24 01:09:10,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:09:10,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1484402544] [2020-10-24 01:09:10,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:09:10,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:09:11,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:09:11,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:09:11,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 01:09:11,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1484402544] [2020-10-24 01:09:11,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 01:09:11,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-24 01:09:11,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151595993] [2020-10-24 01:09:11,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-24 01:09:11,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:09:11,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-24 01:09:11,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-10-24 01:09:11,400 INFO L87 Difference]: Start difference. First operand 101 states and 108 transitions. Second operand 20 states. [2020-10-24 01:09:12,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:09:12,802 INFO L93 Difference]: Finished difference Result 167 states and 178 transitions. [2020-10-24 01:09:12,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-24 01:09:12,803 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 53 [2020-10-24 01:09:12,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:09:12,807 INFO L225 Difference]: With dead ends: 167 [2020-10-24 01:09:12,807 INFO L226 Difference]: Without dead ends: 162 [2020-10-24 01:09:12,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=353, Invalid=1129, Unknown=0, NotChecked=0, Total=1482 [2020-10-24 01:09:12,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-24 01:09:12,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 110. [2020-10-24 01:09:12,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-24 01:09:12,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 117 transitions. [2020-10-24 01:09:12,845 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 117 transitions. Word has length 53 [2020-10-24 01:09:12,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:09:12,845 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 117 transitions. [2020-10-24 01:09:12,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-24 01:09:12,846 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 117 transitions. [2020-10-24 01:09:12,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-24 01:09:12,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:09:12,851 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, 1, 1, 1, 1, 1, 1] [2020-10-24 01:09:12,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-24 01:09:12,852 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:09:12,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:09:12,853 INFO L82 PathProgramCache]: Analyzing trace with hash 2074603335, now seen corresponding path program 2 times [2020-10-24 01:09:12,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:09:12,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1191057003] [2020-10-24 01:09:12,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:09:12,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:09:13,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:09:13,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:09:13,701 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 01:09:13,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1191057003] [2020-10-24 01:09:13,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 01:09:13,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-24 01:09:13,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824128638] [2020-10-24 01:09:13,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-24 01:09:13,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:09:13,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-24 01:09:13,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2020-10-24 01:09:13,704 INFO L87 Difference]: Start difference. First operand 110 states and 117 transitions. Second operand 20 states. [2020-10-24 01:09:14,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:09:14,985 INFO L93 Difference]: Finished difference Result 183 states and 196 transitions. [2020-10-24 01:09:14,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-24 01:09:14,985 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 59 [2020-10-24 01:09:14,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:09:14,988 INFO L225 Difference]: With dead ends: 183 [2020-10-24 01:09:14,989 INFO L226 Difference]: Without dead ends: 178 [2020-10-24 01:09:14,991 INFO L677 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 [2020-10-24 01:09:14,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-24 01:09:15,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 121. [2020-10-24 01:09:15,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-24 01:09:15,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 130 transitions. [2020-10-24 01:09:15,025 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 130 transitions. Word has length 59 [2020-10-24 01:09:15,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:09:15,025 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 130 transitions. [2020-10-24 01:09:15,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-24 01:09:15,026 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 130 transitions. [2020-10-24 01:09:15,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-24 01:09:15,028 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:09:15,029 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] [2020-10-24 01:09:15,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-24 01:09:15,029 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:09:15,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:09:15,030 INFO L82 PathProgramCache]: Analyzing trace with hash 830469357, now seen corresponding path program 1 times [2020-10-24 01:09:15,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:09:15,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1308311354] [2020-10-24 01:09:15,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:09:15,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:09:15,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:09:15,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:09:15,651 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 01:09:15,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1308311354] [2020-10-24 01:09:15,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 01:09:15,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-24 01:09:15,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434586449] [2020-10-24 01:09:15,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-24 01:09:15,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:09:15,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-24 01:09:15,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2020-10-24 01:09:15,654 INFO L87 Difference]: Start difference. First operand 121 states and 130 transitions. Second operand 22 states. [2020-10-24 01:09:17,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:09:17,717 INFO L93 Difference]: Finished difference Result 200 states and 216 transitions. [2020-10-24 01:09:17,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-24 01:09:17,718 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 62 [2020-10-24 01:09:17,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:09:17,721 INFO L225 Difference]: With dead ends: 200 [2020-10-24 01:09:17,721 INFO L226 Difference]: Without dead ends: 177 [2020-10-24 01:09:17,724 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=390, Invalid=1680, Unknown=0, NotChecked=0, Total=2070 [2020-10-24 01:09:17,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-24 01:09:17,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 141. [2020-10-24 01:09:17,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-24 01:09:17,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 151 transitions. [2020-10-24 01:09:17,752 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 151 transitions. Word has length 62 [2020-10-24 01:09:17,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:09:17,752 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 151 transitions. [2020-10-24 01:09:17,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-24 01:09:17,752 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 151 transitions. [2020-10-24 01:09:17,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-24 01:09:17,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:09:17,753 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, 1, 1, 1, 1, 1, 1] [2020-10-24 01:09:17,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-24 01:09:17,754 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:09:17,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:09:17,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1211674589, now seen corresponding path program 1 times [2020-10-24 01:09:17,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:09:17,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [967255730] [2020-10-24 01:09:17,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:09:17,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:09:18,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:09:18,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:09:18,695 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-24 01:09:18,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [967255730] [2020-10-24 01:09:18,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 01:09:18,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-24 01:09:18,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897862878] [2020-10-24 01:09:18,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-24 01:09:18,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:09:18,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-24 01:09:18,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-10-24 01:09:18,698 INFO L87 Difference]: Start difference. First operand 141 states and 151 transitions. Second operand 22 states. [2020-10-24 01:09:20,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:09:20,406 INFO L93 Difference]: Finished difference Result 155 states and 164 transitions. [2020-10-24 01:09:20,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-24 01:09:20,406 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 66 [2020-10-24 01:09:20,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:09:20,408 INFO L225 Difference]: With dead ends: 155 [2020-10-24 01:09:20,408 INFO L226 Difference]: Without dead ends: 150 [2020-10-24 01:09:20,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 6 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=446, Invalid=1360, Unknown=0, NotChecked=0, Total=1806 [2020-10-24 01:09:20,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-24 01:09:20,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 108. [2020-10-24 01:09:20,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-24 01:09:20,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 114 transitions. [2020-10-24 01:09:20,441 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 114 transitions. Word has length 66 [2020-10-24 01:09:20,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:09:20,441 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 114 transitions. [2020-10-24 01:09:20,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-24 01:09:20,441 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 114 transitions. [2020-10-24 01:09:20,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-24 01:09:20,442 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:09:20,442 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 01:09:20,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-24 01:09:20,443 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:09:20,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:09:20,444 INFO L82 PathProgramCache]: Analyzing trace with hash 138770570, now seen corresponding path program 2 times [2020-10-24 01:09:20,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:09:20,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1766732261] [2020-10-24 01:09:20,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:09:20,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:09:20,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:09:20,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:09:20,929 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 01:09:20,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1766732261] [2020-10-24 01:09:20,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 01:09:20,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-24 01:09:20,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123267739] [2020-10-24 01:09:20,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-24 01:09:20,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:09:20,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-24 01:09:20,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2020-10-24 01:09:20,932 INFO L87 Difference]: Start difference. First operand 108 states and 114 transitions. Second operand 17 states. [2020-10-24 01:09:22,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:09:22,294 INFO L93 Difference]: Finished difference Result 153 states and 161 transitions. [2020-10-24 01:09:22,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-24 01:09:22,294 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 69 [2020-10-24 01:09:22,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:09:22,296 INFO L225 Difference]: With dead ends: 153 [2020-10-24 01:09:22,296 INFO L226 Difference]: Without dead ends: 106 [2020-10-24 01:09:22,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=179, Invalid=943, Unknown=0, NotChecked=0, Total=1122 [2020-10-24 01:09:22,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-24 01:09:22,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 92. [2020-10-24 01:09:22,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-24 01:09:22,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 97 transitions. [2020-10-24 01:09:22,322 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 97 transitions. Word has length 69 [2020-10-24 01:09:22,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:09:22,323 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 97 transitions. [2020-10-24 01:09:22,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-24 01:09:22,323 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 97 transitions. [2020-10-24 01:09:22,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-24 01:09:22,324 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:09:22,324 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 01:09:22,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-24 01:09:22,324 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:09:22,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:09:22,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1570160275, now seen corresponding path program 1 times [2020-10-24 01:09:22,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:09:22,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1868688625] [2020-10-24 01:09:22,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:09:22,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:09:23,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:09:23,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:09:23,951 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 01:09:23,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1868688625] [2020-10-24 01:09:23,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 01:09:23,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-24 01:09:23,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179551254] [2020-10-24 01:09:23,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-24 01:09:23,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:09:23,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-24 01:09:23,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=499, Unknown=0, NotChecked=0, Total=552 [2020-10-24 01:09:23,954 INFO L87 Difference]: Start difference. First operand 92 states and 97 transitions. Second operand 24 states. [2020-10-24 01:09:24,743 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2020-10-24 01:09:24,921 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-10-24 01:09:25,139 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2020-10-24 01:09:25,361 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2020-10-24 01:09:25,515 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-10-24 01:09:25,711 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-10-24 01:09:26,057 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2020-10-24 01:09:26,358 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 76 [2020-10-24 01:09:26,677 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 85 [2020-10-24 01:09:26,906 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2020-10-24 01:09:27,271 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-10-24 01:09:28,280 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2020-10-24 01:09:28,443 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-10-24 01:09:29,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:09:29,288 INFO L93 Difference]: Finished difference Result 178 states and 189 transitions. [2020-10-24 01:09:29,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-24 01:09:29,289 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 69 [2020-10-24 01:09:29,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:09:29,291 INFO L225 Difference]: With dead ends: 178 [2020-10-24 01:09:29,291 INFO L226 Difference]: Without dead ends: 174 [2020-10-24 01:09:29,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=439, Invalid=2317, Unknown=0, NotChecked=0, Total=2756 [2020-10-24 01:09:29,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-24 01:09:29,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 127. [2020-10-24 01:09:29,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-24 01:09:29,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 134 transitions. [2020-10-24 01:09:29,326 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 134 transitions. Word has length 69 [2020-10-24 01:09:29,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:09:29,327 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 134 transitions. [2020-10-24 01:09:29,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-24 01:09:29,327 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 134 transitions. [2020-10-24 01:09:29,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-24 01:09:29,328 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:09:29,328 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 01:09:29,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-24 01:09:29,328 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:09:29,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:09:29,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1795880759, now seen corresponding path program 1 times [2020-10-24 01:09:29,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:09:29,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1621779836] [2020-10-24 01:09:29,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:09:29,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 01:09:29,359 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 01:09:29,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 01:09:29,395 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 01:09:29,444 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-24 01:09:29,444 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-24 01:09:29,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-24 01:09:29,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 01:09:29 BoogieIcfgContainer [2020-10-24 01:09:29,527 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-24 01:09:29,530 INFO L168 Benchmark]: Toolchain (without parser) took 25440.86 ms. Allocated memory was 157.3 MB in the beginning and 345.0 MB in the end (delta: 187.7 MB). Free memory was 132.6 MB in the beginning and 311.7 MB in the end (delta: -179.2 MB). Peak memory consumption was 203.7 MB. Max. memory is 8.0 GB. [2020-10-24 01:09:29,530 INFO L168 Benchmark]: CDTParser took 3.23 ms. Allocated memory is still 157.3 MB. Free memory is still 131.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-24 01:09:29,531 INFO L168 Benchmark]: CACSL2BoogieTranslator took 556.20 ms. Allocated memory is still 157.3 MB. Free memory was 132.0 MB in the beginning and 109.9 MB in the end (delta: 22.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. [2020-10-24 01:09:29,534 INFO L168 Benchmark]: Boogie Preprocessor took 96.69 ms. Allocated memory is still 157.3 MB. Free memory was 109.9 MB in the beginning and 139.1 MB in the end (delta: -29.1 MB). Peak memory consumption was 7.2 MB. Max. memory is 8.0 GB. [2020-10-24 01:09:29,535 INFO L168 Benchmark]: RCFGBuilder took 781.32 ms. Allocated memory is still 157.3 MB. Free memory was 139.1 MB in the beginning and 89.9 MB in the end (delta: 49.2 MB). Peak memory consumption was 49.3 MB. Max. memory is 8.0 GB. [2020-10-24 01:09:29,536 INFO L168 Benchmark]: TraceAbstraction took 23994.06 ms. Allocated memory was 157.3 MB in the beginning and 345.0 MB in the end (delta: 187.7 MB). Free memory was 89.4 MB in the beginning and 311.7 MB in the end (delta: -222.4 MB). Peak memory consumption was 159.8 MB. Max. memory is 8.0 GB. [2020-10-24 01:09:29,545 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 3.23 ms. Allocated memory is still 157.3 MB. Free memory is still 131.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 556.20 ms. Allocated memory is still 157.3 MB. Free memory was 132.0 MB in the beginning and 109.9 MB in the end (delta: 22.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 96.69 ms. Allocated memory is still 157.3 MB. Free memory was 109.9 MB in the beginning and 139.1 MB in the end (delta: -29.1 MB). Peak memory consumption was 7.2 MB. Max. memory is 8.0 GB. * RCFGBuilder took 781.32 ms. Allocated memory is still 157.3 MB. Free memory was 139.1 MB in the beginning and 89.9 MB in the end (delta: 49.2 MB). Peak memory consumption was 49.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 23994.06 ms. Allocated memory was 157.3 MB in the beginning and 345.0 MB in the end (delta: 187.7 MB). Free memory was 89.4 MB in the beginning and 311.7 MB in the end (delta: -222.4 MB). Peak memory consumption was 159.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 993]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L1005] SLL* null = malloc(sizeof(SLL)); VAL [malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1006] null->colour = BLACK VAL [malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1007] null->next = ((void*)0) VAL [malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1009] SLL* list = malloc(sizeof(SLL)); VAL [list={-2:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1010] list->next = null VAL [list={-2:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1011] list->colour = BLACK VAL [list={-2:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1013] SLL* end = list; VAL [end={-2:0}, list={-2:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1016] COND TRUE __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=1, end={-2:0}, list={-2:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1019] end->next = malloc(sizeof(SLL)) VAL [end={-2:0}, list={-2:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-3:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1020] EXPR end->next VAL [end={-2:0}, end->next={-3:0}, list={-2:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-3:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1020] end = end->next VAL [end={-3:0}, end->next={-3:0}, list={-2:0}, malloc(sizeof(SLL))={-3:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1021] end->next = null VAL [end={-3:0}, list={-2:0}, malloc(sizeof(SLL))={-3:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1023] COND FALSE !(__VERIFIER_nondet_int()) VAL [__VERIFIER_nondet_int()=0, end={-3:0}, list={-2:0}, malloc(sizeof(SLL))={-3:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1029] end->colour = RED VAL [end={-3:0}, list={-2:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-3:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1030] end->next = malloc(sizeof(SLL)) VAL [end={-3:0}, list={-2:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-3:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1031] EXPR end->next VAL [end={-3:0}, end->next={-4:0}, list={-2:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-3:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1031] end = end->next VAL [end={-4:0}, end->next={-4:0}, list={-2:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-3:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1032] end->next = null VAL [end={-4:0}, list={-2:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-3:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1033] end->colour = BLACK VAL [end={-4:0}, list={-2:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-3:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1016] COND FALSE !(__VERIFIER_nondet_int()) VAL [__VERIFIER_nondet_int()=0, end={-4:0}, list={-2:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-3:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1037] end = null VAL [end={-1:0}, list={-2:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-3:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1038] end = list VAL [end={-2:0}, list={-2:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-3:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1041] COND FALSE !(!(null != end)) VAL [end={-2:0}, list={-2:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-3:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1042] EXPR end->colour VAL [end={-2:0}, end->colour=1, list={-2:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-3:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1042] COND FALSE !(!(BLACK == end->colour)) VAL [end={-2:0}, end->colour=1, list={-2:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-3:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1044] COND TRUE null != end VAL [end={-2:0}, list={-2:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-3:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1046] EXPR end->colour VAL [end={-2:0}, end->colour=1, list={-2:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-3:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1046] COND FALSE !(RED == end->colour) VAL [end={-2:0}, end->colour=1, list={-2:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-3:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1053] EXPR end->next VAL [end={-2:0}, end->next={-3:0}, list={-2:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-3:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1053] end = end->next VAL [end={-3:0}, end->next={-3:0}, list={-2:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-3:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1044] COND TRUE null != end VAL [end={-3:0}, list={-2:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-3:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1046] EXPR end->colour VAL [end={-3:0}, end->colour=0, list={-2:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-3:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1046] COND TRUE RED == end->colour VAL [end={-3:0}, end->colour=0, list={-2:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-3:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1048] EXPR end->next VAL [end={-3:0}, end->next={-4:0}, list={-2:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-3:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1048] end = end->next VAL [end={-4:0}, end->next={-4:0}, list={-2:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-3:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1049] COND FALSE !(!(null != end)) VAL [end={-4:0}, list={-2:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-3:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1050] EXPR end->colour VAL [end={-4:0}, end->colour=1, list={-2:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-3:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1050] COND TRUE !(BLACK != end->colour) VAL [end={-4:0}, end->colour=1, list={-2:0}, malloc(sizeof(SLL))={-4:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-3:0}, malloc(sizeof(SLL))={-1:0}, null={-1:0}] [L1050] CALL reach_error() [L993] COND FALSE !(0) [L993] __assert_fail ("0", "sll-rb-sentinel-2.c", 13, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 108 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 23.8s, OverallIterations: 13, TraceHistogramMax: 3, AutomataDifference: 16.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 798 SDtfs, 4166 SDslu, 4342 SDs, 0 SdLazy, 5120 SolverSat, 805 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 362 GetRequests, 45 SyntacticMatches, 10 SemanticMatches, 307 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1711 ImplicationChecksByTransitivity, 13.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=141occurred 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, 361 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 6.2s InterpolantComputationTime, 677 NumberOfCodeBlocks, 677 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 592 ConstructedInterpolants, 0 QuantifiedInterpolants, 428679 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...