/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/dll-rb-sentinel-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-24 01:08:38,969 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 01:08:38,972 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 01:08:39,014 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-24 01:08:39,015 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-24 01:08:39,018 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-24 01:08:39,037 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-24 01:08:39,046 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-24 01:08:39,050 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-24 01:08:39,057 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-24 01:08:39,059 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-24 01:08:39,063 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-24 01:08:39,064 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 01:08:39,068 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 01:08:39,071 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 01:08:39,074 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 01:08:39,076 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 01:08:39,081 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 01:08:39,090 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 01:08:39,100 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 01:08:39,104 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 01:08:39,107 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 01:08:39,109 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 01:08:39,110 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 01:08:39,118 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-24 01:08:39,118 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-24 01:08:39,119 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-24 01:08:39,123 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-24 01:08:39,125 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-24 01:08:39,127 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-24 01:08:39,127 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-24 01:08:39,128 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-24 01:08:39,131 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-24 01:08:39,132 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-24 01:08:39,134 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-24 01:08:39,135 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-24 01:08:39,136 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-24 01:08:39,136 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-24 01:08:39,137 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-24 01:08:39,138 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-24 01:08:39,139 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-24 01:08:39,141 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 01:08:39,172 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 01:08:39,173 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 01:08:39,180 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 01:08:39,180 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 01:08:39,180 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-24 01:08:39,181 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 01:08:39,181 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 01:08:39,181 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 01:08:39,181 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 01:08:39,182 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 01:08:39,183 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 01:08:39,184 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 01:08:39,184 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 01:08:39,185 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 01:08:39,186 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 01:08:39,186 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-24 01:08:39,187 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 01:08:39,187 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 01:08:39,187 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 01:08:39,187 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 01:08:39,188 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-24 01:08:39,188 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 01:08:39,188 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-10-24 01:08:39,700 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 01:08:39,778 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 01:08:39,782 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 01:08:39,784 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 01:08:39,785 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 01:08:39,786 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-rb-sentinel-1.i [2020-10-24 01:08:39,883 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9bfe3095b/8371746441a843e6a798ef9249c68ebd/FLAGc1f07fa40 [2020-10-24 01:08:40,780 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 01:08:40,781 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/dll-rb-sentinel-1.i [2020-10-24 01:08:40,794 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9bfe3095b/8371746441a843e6a798ef9249c68ebd/FLAGc1f07fa40 [2020-10-24 01:08:40,973 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9bfe3095b/8371746441a843e6a798ef9249c68ebd [2020-10-24 01:08:40,976 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 01:08:40,982 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-24 01:08:40,984 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 01:08:40,984 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 01:08:40,993 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 01:08:40,994 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 01:08:40" (1/1) ... [2020-10-24 01:08:41,000 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f13cb01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:08:40, skipping insertion in model container [2020-10-24 01:08:41,000 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 01:08:40" (1/1) ... [2020-10-24 01:08:41,008 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 01:08:41,061 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-24 01:08:41,414 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 01:08:41,425 INFO L203 MainTranslator]: Completed pre-run [2020-10-24 01:08:41,492 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 01:08:41,557 INFO L208 MainTranslator]: Completed translation [2020-10-24 01:08:41,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:08:41 WrapperNode [2020-10-24 01:08:41,557 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 01:08:41,559 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 01:08:41,559 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 01:08:41,559 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 01:08:41,572 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:08:41" (1/1) ... [2020-10-24 01:08:41,573 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:08:41" (1/1) ... [2020-10-24 01:08:41,589 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:08:41" (1/1) ... [2020-10-24 01:08:41,590 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:08:41" (1/1) ... [2020-10-24 01:08:41,635 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:08:41" (1/1) ... [2020-10-24 01:08:41,642 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:08:41" (1/1) ... [2020-10-24 01:08:41,646 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:08:41" (1/1) ... [2020-10-24 01:08:41,661 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 01:08:41,662 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 01:08:41,662 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 01:08:41,662 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 01:08:41,666 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:08:41" (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 01:08:41,737 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-24 01:08:41,737 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 01:08:41,738 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-24 01:08:41,738 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-24 01:08:41,738 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-24 01:08:41,738 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-24 01:08:41,739 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-24 01:08:41,739 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-24 01:08:41,739 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-24 01:08:41,739 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-24 01:08:41,739 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-24 01:08:41,740 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-24 01:08:41,740 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-24 01:08:41,740 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-24 01:08:41,740 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-24 01:08:41,740 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-24 01:08:41,741 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-24 01:08:41,741 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-24 01:08:41,742 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-24 01:08:41,743 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-24 01:08:41,743 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-24 01:08:41,743 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-24 01:08:41,746 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-24 01:08:41,747 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-24 01:08:41,747 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-24 01:08:41,747 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-24 01:08:41,747 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-24 01:08:41,748 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-24 01:08:41,748 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-24 01:08:41,748 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-24 01:08:41,748 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-24 01:08:41,749 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-24 01:08:41,753 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-24 01:08:41,753 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-24 01:08:41,753 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-24 01:08:41,753 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-24 01:08:41,753 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-24 01:08:41,754 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-24 01:08:41,754 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-24 01:08:41,754 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-24 01:08:41,754 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-24 01:08:41,754 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-24 01:08:41,754 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-24 01:08:41,754 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-24 01:08:41,754 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-24 01:08:41,754 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-24 01:08:41,754 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-24 01:08:41,755 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-24 01:08:41,755 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-24 01:08:41,755 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-24 01:08:41,755 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-24 01:08:41,755 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-24 01:08:41,755 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-24 01:08:41,755 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-24 01:08:41,755 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-24 01:08:41,755 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-24 01:08:41,756 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-24 01:08:41,756 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-24 01:08:41,756 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-24 01:08:41,756 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-24 01:08:41,756 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-24 01:08:41,756 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-24 01:08:41,756 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-24 01:08:41,756 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-24 01:08:41,756 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-24 01:08:41,757 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-24 01:08:41,757 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-24 01:08:41,757 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-24 01:08:41,757 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-24 01:08:41,757 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-24 01:08:41,757 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-24 01:08:41,758 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-24 01:08:41,758 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-24 01:08:41,758 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-24 01:08:41,758 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-24 01:08:41,758 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-24 01:08:41,758 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-24 01:08:41,758 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-24 01:08:41,758 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-24 01:08:41,759 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-24 01:08:41,759 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-24 01:08:41,759 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-24 01:08:41,759 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-24 01:08:41,759 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-24 01:08:41,759 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-24 01:08:41,759 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-24 01:08:41,760 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-24 01:08:41,760 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-24 01:08:41,760 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-24 01:08:41,760 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-24 01:08:41,760 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-24 01:08:41,760 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-24 01:08:41,760 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-24 01:08:41,761 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-24 01:08:41,761 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-24 01:08:41,762 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-24 01:08:41,762 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-24 01:08:41,762 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-24 01:08:41,762 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-24 01:08:41,762 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-24 01:08:41,762 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-24 01:08:41,762 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-24 01:08:41,763 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-24 01:08:41,763 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-24 01:08:41,763 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-24 01:08:41,763 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-24 01:08:41,763 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-24 01:08:41,763 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-24 01:08:41,763 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-24 01:08:41,763 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-24 01:08:41,764 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-24 01:08:41,764 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-24 01:08:41,764 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 01:08:41,764 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-24 01:08:41,764 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-24 01:08:41,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-24 01:08:41,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-24 01:08:41,764 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-24 01:08:41,765 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-24 01:08:41,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-24 01:08:41,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-24 01:08:41,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-24 01:08:41,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 01:08:42,667 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 01:08:42,667 INFO L298 CfgBuilder]: Removed 17 assume(true) statements. [2020-10-24 01:08:42,671 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 01:08:42 BoogieIcfgContainer [2020-10-24 01:08:42,671 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 01:08:42,675 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 01:08:42,675 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 01:08:42,679 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 01:08:42,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 01:08:40" (1/3) ... [2020-10-24 01:08:42,681 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b73a825 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 01:08:42, skipping insertion in model container [2020-10-24 01:08:42,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:08:41" (2/3) ... [2020-10-24 01:08:42,682 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b73a825 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 01:08:42, skipping insertion in model container [2020-10-24 01:08:42,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 01:08:42" (3/3) ... [2020-10-24 01:08:42,684 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-rb-sentinel-1.i [2020-10-24 01:08:42,697 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-24 01:08:42,704 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 01:08:42,721 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 01:08:42,754 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 01:08:42,754 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 01:08:42,755 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-24 01:08:42,756 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 01:08:42,757 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 01:08:42,760 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 01:08:42,760 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 01:08:42,762 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 01:08:42,793 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states. [2020-10-24 01:08:42,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-24 01:08:42,814 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:08:42,825 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 01:08:42,826 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:08:42,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:08:42,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1693122140, now seen corresponding path program 1 times [2020-10-24 01:08:42,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:08:42,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [812830479] [2020-10-24 01:08:42,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:08:43,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:08:43,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:08:43,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:08:43,329 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 01:08:43,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [812830479] [2020-10-24 01:08:43,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 01:08:43,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-24 01:08:43,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054990905] [2020-10-24 01:08:43,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-24 01:08:43,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:08:43,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-24 01:08:43,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-24 01:08:43,368 INFO L87 Difference]: Start difference. First operand 133 states. Second operand 3 states. [2020-10-24 01:08:43,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:08:43,741 INFO L93 Difference]: Finished difference Result 234 states and 307 transitions. [2020-10-24 01:08:43,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-24 01:08:43,743 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-10-24 01:08:43,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:08:43,755 INFO L225 Difference]: With dead ends: 234 [2020-10-24 01:08:43,755 INFO L226 Difference]: Without dead ends: 100 [2020-10-24 01:08:43,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-24 01:08:43,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-24 01:08:43,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2020-10-24 01:08:43,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-24 01:08:43,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 109 transitions. [2020-10-24 01:08:43,818 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 109 transitions. Word has length 29 [2020-10-24 01:08:43,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:08:43,819 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 109 transitions. [2020-10-24 01:08:43,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-24 01:08:43,819 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 109 transitions. [2020-10-24 01:08:43,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-24 01:08:43,821 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:08:43,821 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] [2020-10-24 01:08:43,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-24 01:08:43,822 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:08:43,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:08:43,823 INFO L82 PathProgramCache]: Analyzing trace with hash -88926595, now seen corresponding path program 1 times [2020-10-24 01:08:43,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:08:43,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [107248903] [2020-10-24 01:08:43,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:08:43,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:08:43,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:08:43,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:08:44,024 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 01:08:44,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [107248903] [2020-10-24 01:08:44,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 01:08:44,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-24 01:08:44,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220459375] [2020-10-24 01:08:44,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-24 01:08:44,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:08:44,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-24 01:08:44,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-24 01:08:44,039 INFO L87 Difference]: Start difference. First operand 100 states and 109 transitions. Second operand 8 states. [2020-10-24 01:08:44,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:08:44,603 INFO L93 Difference]: Finished difference Result 124 states and 134 transitions. [2020-10-24 01:08:44,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-24 01:08:44,604 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-10-24 01:08:44,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:08:44,606 INFO L225 Difference]: With dead ends: 124 [2020-10-24 01:08:44,606 INFO L226 Difference]: Without dead ends: 120 [2020-10-24 01:08:44,607 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 01:08:44,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-24 01:08:44,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 99. [2020-10-24 01:08:44,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-24 01:08:44,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 107 transitions. [2020-10-24 01:08:44,629 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 107 transitions. Word has length 31 [2020-10-24 01:08:44,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:08:44,629 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 107 transitions. [2020-10-24 01:08:44,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-24 01:08:44,629 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 107 transitions. [2020-10-24 01:08:44,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-24 01:08:44,631 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:08:44,631 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] [2020-10-24 01:08:44,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-24 01:08:44,631 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:08:44,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:08:44,632 INFO L82 PathProgramCache]: Analyzing trace with hash -790697485, now seen corresponding path program 1 times [2020-10-24 01:08:44,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:08:44,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1149252349] [2020-10-24 01:08:44,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:08:44,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:08:44,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:08:44,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:08:44,940 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 01:08:44,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1149252349] [2020-10-24 01:08:44,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 01:08:44,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-24 01:08:44,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321034987] [2020-10-24 01:08:44,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-24 01:08:44,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:08:44,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-24 01:08:44,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-24 01:08:44,944 INFO L87 Difference]: Start difference. First operand 99 states and 107 transitions. Second operand 9 states. [2020-10-24 01:08:45,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:08:45,459 INFO L93 Difference]: Finished difference Result 147 states and 160 transitions. [2020-10-24 01:08:45,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-24 01:08:45,459 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-10-24 01:08:45,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:08:45,524 INFO L225 Difference]: With dead ends: 147 [2020-10-24 01:08:45,524 INFO L226 Difference]: Without dead ends: 142 [2020-10-24 01:08:45,525 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 01:08:45,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-24 01:08:45,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 108. [2020-10-24 01:08:45,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-24 01:08:45,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 117 transitions. [2020-10-24 01:08:45,669 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 117 transitions. Word has length 35 [2020-10-24 01:08:45,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:08:45,670 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 117 transitions. [2020-10-24 01:08:45,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-24 01:08:45,670 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 117 transitions. [2020-10-24 01:08:45,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-24 01:08:45,674 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:08:45,674 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 01:08:45,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-24 01:08:45,680 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:08:45,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:08:45,681 INFO L82 PathProgramCache]: Analyzing trace with hash -748527052, now seen corresponding path program 1 times [2020-10-24 01:08:45,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:08:45,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470969161] [2020-10-24 01:08:45,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:08:45,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:08:45,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:08:45,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:08:45,868 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 01:08:45,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1470969161] [2020-10-24 01:08:45,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 01:08:45,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-24 01:08:45,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51627339] [2020-10-24 01:08:45,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-24 01:08:45,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:08:45,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-24 01:08:45,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-24 01:08:45,871 INFO L87 Difference]: Start difference. First operand 108 states and 117 transitions. Second operand 6 states. [2020-10-24 01:08:46,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:08:46,247 INFO L93 Difference]: Finished difference Result 142 states and 154 transitions. [2020-10-24 01:08:46,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-24 01:08:46,248 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2020-10-24 01:08:46,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:08:46,251 INFO L225 Difference]: With dead ends: 142 [2020-10-24 01:08:46,251 INFO L226 Difference]: Without dead ends: 119 [2020-10-24 01:08:46,252 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-24 01:08:46,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-24 01:08:46,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 111. [2020-10-24 01:08:46,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-24 01:08:46,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 120 transitions. [2020-10-24 01:08:46,275 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 120 transitions. Word has length 44 [2020-10-24 01:08:46,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:08:46,275 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 120 transitions. [2020-10-24 01:08:46,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-24 01:08:46,276 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 120 transitions. [2020-10-24 01:08:46,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-24 01:08:46,277 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:08:46,277 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 01:08:46,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-24 01:08:46,278 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:08:46,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:08:46,278 INFO L82 PathProgramCache]: Analyzing trace with hash -2004200053, now seen corresponding path program 1 times [2020-10-24 01:08:46,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:08:46,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [771126764] [2020-10-24 01:08:46,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:08:46,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:08:46,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:08:46,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:08:46,365 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 01:08:46,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [771126764] [2020-10-24 01:08:46,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 01:08:46,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-24 01:08:46,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992540221] [2020-10-24 01:08:46,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-24 01:08:46,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:08:46,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-24 01:08:46,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-24 01:08:46,367 INFO L87 Difference]: Start difference. First operand 111 states and 120 transitions. Second operand 5 states. [2020-10-24 01:08:46,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:08:46,644 INFO L93 Difference]: Finished difference Result 119 states and 127 transitions. [2020-10-24 01:08:46,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-24 01:08:46,645 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 44 [2020-10-24 01:08:46,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:08:46,647 INFO L225 Difference]: With dead ends: 119 [2020-10-24 01:08:46,647 INFO L226 Difference]: Without dead ends: 114 [2020-10-24 01:08:46,647 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-24 01:08:46,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-24 01:08:46,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 109. [2020-10-24 01:08:46,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-24 01:08:46,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 117 transitions. [2020-10-24 01:08:46,667 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 117 transitions. Word has length 44 [2020-10-24 01:08:46,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:08:46,667 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 117 transitions. [2020-10-24 01:08:46,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-24 01:08:46,668 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 117 transitions. [2020-10-24 01:08:46,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-24 01:08:46,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:08:46,669 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 01:08:46,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-24 01:08:46,669 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:08:46,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:08:46,670 INFO L82 PathProgramCache]: Analyzing trace with hash -828430875, now seen corresponding path program 1 times [2020-10-24 01:08:46,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:08:46,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1250749930] [2020-10-24 01:08:46,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:08:46,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:08:46,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:08:46,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:08:46,824 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 01:08:46,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1250749930] [2020-10-24 01:08:46,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 01:08:46,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-24 01:08:46,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075861321] [2020-10-24 01:08:46,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-24 01:08:46,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:08:46,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-24 01:08:46,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-24 01:08:46,827 INFO L87 Difference]: Start difference. First operand 109 states and 117 transitions. Second operand 5 states. [2020-10-24 01:08:47,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:08:47,176 INFO L93 Difference]: Finished difference Result 115 states and 122 transitions. [2020-10-24 01:08:47,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-24 01:08:47,176 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 48 [2020-10-24 01:08:47,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:08:47,178 INFO L225 Difference]: With dead ends: 115 [2020-10-24 01:08:47,178 INFO L226 Difference]: Without dead ends: 110 [2020-10-24 01:08:47,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-24 01:08:47,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-24 01:08:47,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 107. [2020-10-24 01:08:47,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-24 01:08:47,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 114 transitions. [2020-10-24 01:08:47,201 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 114 transitions. Word has length 48 [2020-10-24 01:08:47,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:08:47,204 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 114 transitions. [2020-10-24 01:08:47,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-24 01:08:47,204 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 114 transitions. [2020-10-24 01:08:47,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-24 01:08:47,211 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:08:47,211 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 01:08:47,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-24 01:08:47,212 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:08:47,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:08:47,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1419930978, now seen corresponding path program 1 times [2020-10-24 01:08:47,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:08:47,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [694319277] [2020-10-24 01:08:47,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:08:47,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:08:47,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:08:47,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:08:47,576 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 01:08:47,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [694319277] [2020-10-24 01:08:47,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 01:08:47,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-10-24 01:08:47,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218367568] [2020-10-24 01:08:47,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-24 01:08:47,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:08:47,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-24 01:08:47,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-10-24 01:08:47,579 INFO L87 Difference]: Start difference. First operand 107 states and 114 transitions. Second operand 14 states. [2020-10-24 01:08:48,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:08:48,661 INFO L93 Difference]: Finished difference Result 159 states and 168 transitions. [2020-10-24 01:08:48,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-24 01:08:48,661 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 50 [2020-10-24 01:08:48,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:08:48,663 INFO L225 Difference]: With dead ends: 159 [2020-10-24 01:08:48,663 INFO L226 Difference]: Without dead ends: 155 [2020-10-24 01:08:48,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2020-10-24 01:08:48,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-24 01:08:48,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 130. [2020-10-24 01:08:48,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-24 01:08:48,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 138 transitions. [2020-10-24 01:08:48,693 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 138 transitions. Word has length 50 [2020-10-24 01:08:48,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:08:48,693 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 138 transitions. [2020-10-24 01:08:48,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-24 01:08:48,693 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 138 transitions. [2020-10-24 01:08:48,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-24 01:08:48,694 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:08:48,695 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, 1, 1] [2020-10-24 01:08:48,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-24 01:08:48,695 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:08:48,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:08:48,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1260269010, now seen corresponding path program 1 times [2020-10-24 01:08:48,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:08:48,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2074543698] [2020-10-24 01:08:48,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:08:48,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:08:48,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:08:48,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:08:48,869 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 01:08:48,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2074543698] [2020-10-24 01:08:48,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 01:08:48,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-24 01:08:48,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181469445] [2020-10-24 01:08:48,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-24 01:08:48,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:08:48,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-24 01:08:48,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-24 01:08:48,874 INFO L87 Difference]: Start difference. First operand 130 states and 138 transitions. Second operand 7 states. [2020-10-24 01:08:49,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:08:49,417 INFO L93 Difference]: Finished difference Result 163 states and 173 transitions. [2020-10-24 01:08:49,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-24 01:08:49,418 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 51 [2020-10-24 01:08:49,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:08:49,419 INFO L225 Difference]: With dead ends: 163 [2020-10-24 01:08:49,419 INFO L226 Difference]: Without dead ends: 123 [2020-10-24 01:08:49,420 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-24 01:08:49,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-24 01:08:49,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2020-10-24 01:08:49,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-24 01:08:49,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 130 transitions. [2020-10-24 01:08:49,443 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 130 transitions. Word has length 51 [2020-10-24 01:08:49,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:08:49,443 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 130 transitions. [2020-10-24 01:08:49,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-24 01:08:49,444 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 130 transitions. [2020-10-24 01:08:49,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-24 01:08:49,444 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:08:49,445 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 01:08:49,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-24 01:08:49,445 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:08:49,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:08:49,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1368636775, now seen corresponding path program 1 times [2020-10-24 01:08:49,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:08:49,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [800624453] [2020-10-24 01:08:49,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:08:49,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:08:49,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:08:49,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:08:49,862 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 01:08:49,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [800624453] [2020-10-24 01:08:49,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 01:08:49,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2020-10-24 01:08:49,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123327331] [2020-10-24 01:08:49,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-24 01:08:49,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:08:49,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-24 01:08:49,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2020-10-24 01:08:49,865 INFO L87 Difference]: Start difference. First operand 123 states and 130 transitions. Second operand 19 states. [2020-10-24 01:08:51,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:08:51,570 INFO L93 Difference]: Finished difference Result 192 states and 203 transitions. [2020-10-24 01:08:51,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-24 01:08:51,573 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 60 [2020-10-24 01:08:51,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:08:51,575 INFO L225 Difference]: With dead ends: 192 [2020-10-24 01:08:51,575 INFO L226 Difference]: Without dead ends: 188 [2020-10-24 01:08:51,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=294, Invalid=1112, Unknown=0, NotChecked=0, Total=1406 [2020-10-24 01:08:51,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-10-24 01:08:51,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 170. [2020-10-24 01:08:51,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-10-24 01:08:51,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 180 transitions. [2020-10-24 01:08:51,629 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 180 transitions. Word has length 60 [2020-10-24 01:08:51,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:08:51,631 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 180 transitions. [2020-10-24 01:08:51,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-24 01:08:51,631 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 180 transitions. [2020-10-24 01:08:51,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-24 01:08:51,632 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:08:51,632 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 01:08:51,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-24 01:08:51,632 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:08:51,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:08:51,633 INFO L82 PathProgramCache]: Analyzing trace with hash -437498776, now seen corresponding path program 1 times [2020-10-24 01:08:51,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:08:51,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1426727804] [2020-10-24 01:08:51,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:08:51,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:08:52,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:08:52,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:08:52,399 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 01:08:52,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1426727804] [2020-10-24 01:08:52,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 01:08:52,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-24 01:08:52,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022595836] [2020-10-24 01:08:52,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-24 01:08:52,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:08:52,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-24 01:08:52,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-10-24 01:08:52,402 INFO L87 Difference]: Start difference. First operand 170 states and 180 transitions. Second operand 17 states. [2020-10-24 01:08:53,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:08:53,795 INFO L93 Difference]: Finished difference Result 227 states and 241 transitions. [2020-10-24 01:08:53,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-24 01:08:53,796 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 61 [2020-10-24 01:08:53,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:08:53,798 INFO L225 Difference]: With dead ends: 227 [2020-10-24 01:08:53,799 INFO L226 Difference]: Without dead ends: 222 [2020-10-24 01:08:53,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=252, Invalid=740, Unknown=0, NotChecked=0, Total=992 [2020-10-24 01:08:53,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-24 01:08:53,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 180. [2020-10-24 01:08:53,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-24 01:08:53,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 191 transitions. [2020-10-24 01:08:53,842 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 191 transitions. Word has length 61 [2020-10-24 01:08:53,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:08:53,843 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 191 transitions. [2020-10-24 01:08:53,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-24 01:08:53,843 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 191 transitions. [2020-10-24 01:08:53,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-24 01:08:53,844 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:08:53,844 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 01:08:53,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-24 01:08:53,844 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:08:53,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:08:53,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1852655105, now seen corresponding path program 1 times [2020-10-24 01:08:53,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:08:53,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2048134857] [2020-10-24 01:08:53,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:08:53,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:08:54,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:08:54,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:08:55,002 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 01:08:55,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2048134857] [2020-10-24 01:08:55,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 01:08:55,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-24 01:08:55,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427992884] [2020-10-24 01:08:55,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-24 01:08:55,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:08:55,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-24 01:08:55,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-10-24 01:08:55,004 INFO L87 Difference]: Start difference. First operand 180 states and 191 transitions. Second operand 23 states. [2020-10-24 01:08:57,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:08:57,051 INFO L93 Difference]: Finished difference Result 257 states and 272 transitions. [2020-10-24 01:08:57,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-24 01:08:57,051 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 71 [2020-10-24 01:08:57,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:08:57,054 INFO L225 Difference]: With dead ends: 257 [2020-10-24 01:08:57,054 INFO L226 Difference]: Without dead ends: 252 [2020-10-24 01:08:57,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=436, Invalid=1544, Unknown=0, NotChecked=0, Total=1980 [2020-10-24 01:08:57,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-24 01:08:57,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 204. [2020-10-24 01:08:57,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-10-24 01:08:57,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 216 transitions. [2020-10-24 01:08:57,101 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 216 transitions. Word has length 71 [2020-10-24 01:08:57,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:08:57,101 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 216 transitions. [2020-10-24 01:08:57,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-24 01:08:57,102 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 216 transitions. [2020-10-24 01:08:57,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-24 01:08:57,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:08:57,103 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 01:08:57,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-24 01:08:57,103 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:08:57,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:08:57,104 INFO L82 PathProgramCache]: Analyzing trace with hash 692737929, now seen corresponding path program 1 times [2020-10-24 01:08:57,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:08:57,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1460530346] [2020-10-24 01:08:57,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:08:57,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:08:57,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:08:57,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:08:57,768 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 01:08:57,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1460530346] [2020-10-24 01:08:57,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 01:08:57,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-24 01:08:57,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046170408] [2020-10-24 01:08:57,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-24 01:08:57,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:08:57,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-24 01:08:57,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2020-10-24 01:08:57,771 INFO L87 Difference]: Start difference. First operand 204 states and 216 transitions. Second operand 21 states. [2020-10-24 01:08:58,619 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 46 [2020-10-24 01:08:59,776 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 48 [2020-10-24 01:09:00,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:09:00,190 INFO L93 Difference]: Finished difference Result 215 states and 226 transitions. [2020-10-24 01:09:00,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-24 01:09:00,191 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 76 [2020-10-24 01:09:00,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:09:00,192 INFO L225 Difference]: With dead ends: 215 [2020-10-24 01:09:00,192 INFO L226 Difference]: Without dead ends: 211 [2020-10-24 01:09:00,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=354, Invalid=1052, Unknown=0, NotChecked=0, Total=1406 [2020-10-24 01:09:00,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-10-24 01:09:00,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 204. [2020-10-24 01:09:00,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-10-24 01:09:00,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 215 transitions. [2020-10-24 01:09:00,258 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 215 transitions. Word has length 76 [2020-10-24 01:09:00,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:09:00,259 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 215 transitions. [2020-10-24 01:09:00,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-24 01:09:00,259 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 215 transitions. [2020-10-24 01:09:00,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-24 01:09:00,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:09:00,267 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 01:09:00,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-24 01:09:00,268 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:09:00,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:09:00,268 INFO L82 PathProgramCache]: Analyzing trace with hash -192042333, now seen corresponding path program 1 times [2020-10-24 01:09:00,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:09:00,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [149988097] [2020-10-24 01:09:00,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:09:00,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:09:01,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:09:01,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:09:01,096 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 01:09:01,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [149988097] [2020-10-24 01:09:01,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 01:09:01,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-24 01:09:01,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725798802] [2020-10-24 01:09:01,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-24 01:09:01,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:09:01,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-24 01:09:01,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2020-10-24 01:09:01,099 INFO L87 Difference]: Start difference. First operand 204 states and 215 transitions. Second operand 25 states. [2020-10-24 01:09:03,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:09:03,921 INFO L93 Difference]: Finished difference Result 280 states and 297 transitions. [2020-10-24 01:09:03,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-24 01:09:03,921 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 77 [2020-10-24 01:09:03,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:09:03,923 INFO L225 Difference]: With dead ends: 280 [2020-10-24 01:09:03,923 INFO L226 Difference]: Without dead ends: 257 [2020-10-24 01:09:03,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=439, Invalid=2111, Unknown=0, NotChecked=0, Total=2550 [2020-10-24 01:09:03,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-10-24 01:09:03,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 220. [2020-10-24 01:09:03,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-10-24 01:09:03,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 231 transitions. [2020-10-24 01:09:03,969 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 231 transitions. Word has length 77 [2020-10-24 01:09:03,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:09:03,969 INFO L481 AbstractCegarLoop]: Abstraction has 220 states and 231 transitions. [2020-10-24 01:09:03,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-24 01:09:03,969 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 231 transitions. [2020-10-24 01:09:03,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-24 01:09:03,970 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:09:03,971 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 01:09:03,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-24 01:09:03,971 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:09:03,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:09:03,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1553465055, now seen corresponding path program 2 times [2020-10-24 01:09:03,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:09:03,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [794354637] [2020-10-24 01:09:03,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:09:03,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:09:04,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:09:04,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:09:04,414 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 01:09:04,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [794354637] [2020-10-24 01:09:04,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 01:09:04,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-24 01:09:04,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163977087] [2020-10-24 01:09:04,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-24 01:09:04,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:09:04,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-24 01:09:04,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2020-10-24 01:09:04,417 INFO L87 Difference]: Start difference. First operand 220 states and 231 transitions. Second operand 19 states. [2020-10-24 01:09:06,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:09:06,246 INFO L93 Difference]: Finished difference Result 262 states and 275 transitions. [2020-10-24 01:09:06,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-24 01:09:06,246 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 84 [2020-10-24 01:09:06,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:09:06,249 INFO L225 Difference]: With dead ends: 262 [2020-10-24 01:09:06,249 INFO L226 Difference]: Without dead ends: 215 [2020-10-24 01:09:06,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=220, Invalid=1262, Unknown=0, NotChecked=0, Total=1482 [2020-10-24 01:09:06,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-24 01:09:06,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 204. [2020-10-24 01:09:06,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-10-24 01:09:06,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 214 transitions. [2020-10-24 01:09:06,292 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 214 transitions. Word has length 84 [2020-10-24 01:09:06,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:09:06,293 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 214 transitions. [2020-10-24 01:09:06,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-24 01:09:06,293 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 214 transitions. [2020-10-24 01:09:06,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-24 01:09:06,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:09:06,294 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 01:09:06,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-24 01:09:06,295 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:09:06,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:09:06,295 INFO L82 PathProgramCache]: Analyzing trace with hash 627452178, now seen corresponding path program 1 times [2020-10-24 01:09:06,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:09:06,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [610877033] [2020-10-24 01:09:06,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:09:06,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:09:07,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:09:07,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:09:07,045 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 01:09:07,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [610877033] [2020-10-24 01:09:07,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 01:09:07,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-24 01:09:07,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147020957] [2020-10-24 01:09:07,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-24 01:09:07,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:09:07,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-24 01:09:07,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2020-10-24 01:09:07,047 INFO L87 Difference]: Start difference. First operand 204 states and 214 transitions. Second operand 26 states. [2020-10-24 01:09:09,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:09:09,470 INFO L93 Difference]: Finished difference Result 233 states and 244 transitions. [2020-10-24 01:09:09,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-24 01:09:09,471 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 86 [2020-10-24 01:09:09,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:09:09,472 INFO L225 Difference]: With dead ends: 233 [2020-10-24 01:09:09,472 INFO L226 Difference]: Without dead ends: 229 [2020-10-24 01:09:09,474 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=484, Invalid=1678, Unknown=0, NotChecked=0, Total=2162 [2020-10-24 01:09:09,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-24 01:09:09,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 204. [2020-10-24 01:09:09,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-10-24 01:09:09,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 214 transitions. [2020-10-24 01:09:09,507 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 214 transitions. Word has length 86 [2020-10-24 01:09:09,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:09:09,508 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 214 transitions. [2020-10-24 01:09:09,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-24 01:09:09,508 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 214 transitions. [2020-10-24 01:09:09,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-24 01:09:09,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:09:09,510 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 01:09:09,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-24 01:09:09,510 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:09:09,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:09:09,510 INFO L82 PathProgramCache]: Analyzing trace with hash -818948451, now seen corresponding path program 2 times [2020-10-24 01:09:09,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:09:09,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1053248057] [2020-10-24 01:09:09,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:09:09,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:09:10,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:09:10,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:09:10,649 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 01:09:10,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1053248057] [2020-10-24 01:09:10,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 01:09:10,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-24 01:09:10,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544756579] [2020-10-24 01:09:10,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-24 01:09:10,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:09:10,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-24 01:09:10,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2020-10-24 01:09:10,654 INFO L87 Difference]: Start difference. First operand 204 states and 214 transitions. Second operand 23 states. [2020-10-24 01:09:12,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:09:12,837 INFO L93 Difference]: Finished difference Result 284 states and 299 transitions. [2020-10-24 01:09:12,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-24 01:09:12,838 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 87 [2020-10-24 01:09:12,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:09:12,840 INFO L225 Difference]: With dead ends: 284 [2020-10-24 01:09:12,840 INFO L226 Difference]: Without dead ends: 279 [2020-10-24 01:09:12,841 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=458, Invalid=1522, Unknown=0, NotChecked=0, Total=1980 [2020-10-24 01:09:12,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-10-24 01:09:12,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 230. [2020-10-24 01:09:12,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2020-10-24 01:09:12,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 242 transitions. [2020-10-24 01:09:12,885 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 242 transitions. Word has length 87 [2020-10-24 01:09:12,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:09:12,886 INFO L481 AbstractCegarLoop]: Abstraction has 230 states and 242 transitions. [2020-10-24 01:09:12,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-24 01:09:12,886 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 242 transitions. [2020-10-24 01:09:12,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-24 01:09:12,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:09:12,887 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 01:09:12,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-24 01:09:12,888 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:09:12,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:09:12,888 INFO L82 PathProgramCache]: Analyzing trace with hash 2079066682, now seen corresponding path program 1 times [2020-10-24 01:09:12,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:09:12,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1094059209] [2020-10-24 01:09:12,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:09:12,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:09:13,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:09:13,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:09:13,837 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 01:09:13,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1094059209] [2020-10-24 01:09:13,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 01:09:13,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-24 01:09:13,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682425022] [2020-10-24 01:09:13,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-24 01:09:13,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:09:13,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-24 01:09:13,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2020-10-24 01:09:13,844 INFO L87 Difference]: Start difference. First operand 230 states and 242 transitions. Second operand 25 states. [2020-10-24 01:09:15,348 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2020-10-24 01:09:16,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:09:16,881 INFO L93 Difference]: Finished difference Result 301 states and 318 transitions. [2020-10-24 01:09:16,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-24 01:09:16,882 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 87 [2020-10-24 01:09:16,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:09:16,883 INFO L225 Difference]: With dead ends: 301 [2020-10-24 01:09:16,883 INFO L226 Difference]: Without dead ends: 297 [2020-10-24 01:09:16,885 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=398, Invalid=2152, Unknown=0, NotChecked=0, Total=2550 [2020-10-24 01:09:16,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-10-24 01:09:16,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 254. [2020-10-24 01:09:16,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-10-24 01:09:16,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 267 transitions. [2020-10-24 01:09:16,941 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 267 transitions. Word has length 87 [2020-10-24 01:09:16,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:09:16,941 INFO L481 AbstractCegarLoop]: Abstraction has 254 states and 267 transitions. [2020-10-24 01:09:16,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-24 01:09:16,941 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 267 transitions. [2020-10-24 01:09:16,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-24 01:09:16,942 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:09:16,943 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 01:09:16,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-24 01:09:16,943 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:09:16,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:09:16,944 INFO L82 PathProgramCache]: Analyzing trace with hash 352095152, now seen corresponding path program 1 times [2020-10-24 01:09:16,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:09:16,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1804671777] [2020-10-24 01:09:16,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:09:16,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 01:09:16,974 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 01:09:17,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 01:09:17,003 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 01:09:17,051 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-24 01:09:17,051 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-24 01:09:17,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-24 01:09:17,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 01:09:17 BoogieIcfgContainer [2020-10-24 01:09:17,126 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-24 01:09:17,128 INFO L168 Benchmark]: Toolchain (without parser) took 36150.38 ms. Allocated memory was 151.0 MB in the beginning and 381.7 MB in the end (delta: 230.7 MB). Free memory was 126.6 MB in the beginning and 330.0 MB in the end (delta: -203.4 MB). Peak memory consumption was 28.7 MB. Max. memory is 8.0 GB. [2020-10-24 01:09:17,129 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 151.0 MB. Free memory was 123.9 MB in the beginning and 123.9 MB in the end (delta: 73.7 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-24 01:09:17,130 INFO L168 Benchmark]: CACSL2BoogieTranslator took 573.71 ms. Allocated memory is still 151.0 MB. Free memory was 126.1 MB in the beginning and 103.7 MB in the end (delta: 22.4 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2020-10-24 01:09:17,130 INFO L168 Benchmark]: Boogie Preprocessor took 102.21 ms. Allocated memory is still 151.0 MB. Free memory was 103.7 MB in the beginning and 133.2 MB in the end (delta: -29.5 MB). Peak memory consumption was 5.8 MB. Max. memory is 8.0 GB. [2020-10-24 01:09:17,131 INFO L168 Benchmark]: RCFGBuilder took 1009.30 ms. Allocated memory is still 151.0 MB. Free memory was 133.2 MB in the beginning and 78.7 MB in the end (delta: 54.5 MB). Peak memory consumption was 54.5 MB. Max. memory is 8.0 GB. [2020-10-24 01:09:17,132 INFO L168 Benchmark]: TraceAbstraction took 34451.55 ms. Allocated memory was 151.0 MB in the beginning and 381.7 MB in the end (delta: 230.7 MB). Free memory was 78.2 MB in the beginning and 330.0 MB in the end (delta: -251.8 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-24 01:09:17,135 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 151.0 MB. Free memory was 123.9 MB in the beginning and 123.9 MB in the end (delta: 73.7 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 573.71 ms. Allocated memory is still 151.0 MB. Free memory was 126.1 MB in the beginning and 103.7 MB in the end (delta: 22.4 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 102.21 ms. Allocated memory is still 151.0 MB. Free memory was 103.7 MB in the beginning and 133.2 MB in the end (delta: -29.5 MB). Peak memory consumption was 5.8 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1009.30 ms. Allocated memory is still 151.0 MB. Free memory was 133.2 MB in the beginning and 78.7 MB in the end (delta: 54.5 MB). Peak memory consumption was 54.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 34451.55 ms. Allocated memory was 151.0 MB in the beginning and 381.7 MB in the end (delta: 230.7 MB). Free memory was 78.2 MB in the beginning and 330.0 MB in the end (delta: -251.8 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 985]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L998] struct TSLL* null = malloc(sizeof(struct TSLL)); VAL [malloc(sizeof(struct TSLL))={-1:0}, null={-1:0}] [L999] null->next = ((void*)0) VAL [malloc(sizeof(struct TSLL))={-1:0}, null={-1:0}] [L1000] null->prev = ((void*)0) VAL [malloc(sizeof(struct TSLL))={-1:0}, null={-1:0}] [L1001] null->colour = BLACK VAL [malloc(sizeof(struct TSLL))={-1:0}, null={-1:0}] [L1003] struct TSLL* list = malloc(sizeof(struct TSLL)); VAL [list={-2:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-1:0}, null={-1:0}] [L1004] list->next = null VAL [list={-2:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-1:0}, null={-1:0}] [L1005] list->prev = null VAL [list={-2:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-1:0}, null={-1:0}] [L1006] list->colour = BLACK VAL [list={-2:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-1:0}, null={-1:0}] [L1008] struct TSLL* end = list; VAL [end={-2:0}, list={-2:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-1:0}, null={-1:0}] [L1011] COND TRUE __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=1, end={-2:0}, list={-2:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-1:0}, null={-1:0}] [L1014] end->next = malloc(sizeof(struct TSLL)) VAL [end={-2:0}, list={-2:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-3:0}, null={-1:0}] [L1015] EXPR end->next VAL [end={-2:0}, end->next={-3:0}, list={-2:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-3:0}, null={-1:0}] [L1015] end->next->prev = end VAL [end={-2:0}, end->next={-3:0}, list={-2:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-3:0}, null={-1:0}] [L1016] EXPR end->next VAL [end={-2:0}, end->next={-3:0}, list={-2:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-3:0}, null={-1:0}] [L1016] end = end->next VAL [end={-3:0}, end->next={-3:0}, list={-2:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-3:0}, null={-1:0}] [L1017] end->next = null VAL [end={-3:0}, list={-2:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-3:0}, null={-1:0}] [L1019] COND FALSE !(__VERIFIER_nondet_int()) VAL [__VERIFIER_nondet_int()=0, end={-3:0}, list={-2:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-3:0}, null={-1:0}] [L1025] end->colour = RED VAL [end={-3:0}, list={-2:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-3:0}, null={-1:0}] [L1026] end->next = malloc(sizeof(struct TSLL)) VAL [end={-3:0}, list={-2:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-4:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-3:0}, null={-1:0}] [L1027] EXPR end->next VAL [end={-3:0}, end->next={-4:0}, list={-2:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-4:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-3:0}, null={-1:0}] [L1027] end->next->prev = end VAL [end={-3:0}, end->next={-4:0}, list={-2:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-4:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-3:0}, null={-1:0}] [L1028] EXPR end->next VAL [end={-3:0}, end->next={-4:0}, list={-2:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-4:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-3:0}, null={-1:0}] [L1028] end = end->next VAL [end={-4:0}, end->next={-4:0}, list={-2:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-4:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-3:0}, null={-1:0}] [L1029] end->next = null VAL [end={-4:0}, list={-2:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-4:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-3:0}, null={-1:0}] [L1030] end->colour = BLACK VAL [end={-4:0}, list={-2:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-4:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-3:0}, null={-1:0}] [L1032] EXPR end->colour VAL [end={-4:0}, end->colour=1, list={-2:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-4:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-3:0}, null={-1:0}] [L1032] COND FALSE !(!(BLACK == end->colour)) VAL [end={-4:0}, end->colour=1, list={-2:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-4:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-3:0}, null={-1:0}] [L1033] EXPR end->next VAL [end={-4:0}, end->next={-1:0}, list={-2:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-4:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-3:0}, null={-1:0}] [L1033] COND FALSE !(!(null == end->next)) VAL [end={-4:0}, end->next={-1:0}, list={-2:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-4:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-3:0}, null={-1:0}] [L1034] COND FALSE !(!(null != end)) VAL [end={-4:0}, list={-2:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-4:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-3:0}, null={-1:0}] [L1011] COND FALSE !(__VERIFIER_nondet_int()) VAL [__VERIFIER_nondet_int()=0, end={-4:0}, list={-2:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-4:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-3:0}, null={-1:0}] [L1037] end = null VAL [end={-1:0}, list={-2:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-4:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-3:0}, null={-1:0}] [L1038] end = list VAL [end={-2:0}, list={-2:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-4:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-3:0}, null={-1:0}] [L1041] COND FALSE !(!(null != end)) VAL [end={-2:0}, list={-2:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-4:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-3:0}, null={-1:0}] [L1042] EXPR end->colour VAL [end={-2:0}, end->colour=1, list={-2:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-4:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-3:0}, null={-1:0}] [L1042] COND FALSE !(!(BLACK == end->colour)) VAL [end={-2:0}, end->colour=1, list={-2:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-4:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-3:0}, null={-1:0}] [L1043] COND TRUE null != end VAL [end={-2:0}, list={-2:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-4:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-3:0}, null={-1:0}] [L1045] EXPR end->colour VAL [end={-2:0}, end->colour=1, list={-2:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-4:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-3:0}, null={-1:0}] [L1045] COND FALSE !(RED == end->colour) VAL [end={-2:0}, end->colour=1, list={-2:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-4:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-3:0}, null={-1:0}] [L1052] EXPR end->next VAL [end={-2:0}, end->next={-3:0}, list={-2:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-4:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-3:0}, null={-1:0}] [L1052] end = end->next VAL [end={-3:0}, end->next={-3:0}, list={-2:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-4:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-3:0}, null={-1:0}] [L1043] COND TRUE null != end VAL [end={-3:0}, list={-2:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-4:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-3:0}, null={-1:0}] [L1045] EXPR end->colour VAL [end={-3:0}, end->colour=0, list={-2:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-4:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-3:0}, null={-1:0}] [L1045] COND TRUE RED == end->colour VAL [end={-3:0}, end->colour=0, list={-2:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-4:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-3:0}, null={-1:0}] [L1047] EXPR end->next VAL [end={-3:0}, end->next={-4:0}, list={-2:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-4:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-3:0}, null={-1:0}] [L1047] end = end->next VAL [end={-4:0}, end->next={-4:0}, list={-2:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-4:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-3:0}, null={-1:0}] [L1048] COND FALSE !(!(null != end)) VAL [end={-4:0}, list={-2:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-4:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-3:0}, null={-1:0}] [L1049] EXPR end->colour VAL [end={-4:0}, end->colour=1, list={-2:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-4:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-3:0}, null={-1:0}] [L1049] COND TRUE !(BLACK != end->colour) VAL [end={-4:0}, end->colour=1, list={-2:0}, malloc(sizeof(struct TSLL))={-2:0}, malloc(sizeof(struct TSLL))={-4:0}, malloc(sizeof(struct TSLL))={-1:0}, malloc(sizeof(struct TSLL))={-3:0}, null={-1:0}] [L1049] CALL reach_error() [L985] COND FALSE !(0) [L985] __assert_fail ("0", "dll-rb-sentinel-1.c", 14, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 133 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 34.3s, OverallIterations: 18, TraceHistogramMax: 3, AutomataDifference: 24.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1399 SDtfs, 7268 SDslu, 8115 SDs, 0 SdLazy, 9818 SolverSat, 1257 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 9.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 514 GetRequests, 61 SyntacticMatches, 14 SemanticMatches, 439 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2615 ImplicationChecksByTransitivity, 16.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=254occurred in iteration=17, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 17 MinimizatonAttempts, 376 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 7.9s InterpolantComputationTime, 1112 NumberOfCodeBlocks, 1112 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 1004 ConstructedInterpolants, 0 QuantifiedInterpolants, 780296 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 17 InterpolantComputations, 8 PerfectInterpolantSequences, 6/110 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...