/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/forester-heap/sll-01-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 05:20:57,503 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 05:20:57,506 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 05:20:57,562 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-07 05:20:57,563 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-07 05:20:57,567 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-07 05:20:57,571 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-07 05:20:57,579 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-07 05:20:57,583 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-07 05:20:57,589 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-07 05:20:57,591 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-07 05:20:57,593 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-07 05:20:57,593 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 05:20:57,598 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 05:20:57,600 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 05:20:57,603 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 05:20:57,604 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 05:20:57,607 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 05:20:57,615 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 05:20:57,623 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 05:20:57,625 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 05:20:57,627 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 05:20:57,629 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 05:20:57,632 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 05:20:57,641 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-07 05:20:57,641 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-07 05:20:57,656 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-07 05:20:57,657 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-07 05:20:57,658 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-07 05:20:57,662 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-07 05:20:57,663 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-07 05:20:57,664 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-07 05:20:57,666 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-07 05:20:57,668 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-07 05:20:57,669 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-07 05:20:57,669 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-07 05:20:57,670 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-07 05:20:57,670 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-07 05:20:57,670 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 05:20:57,671 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 05:20:57,672 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 05:20:57,673 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 05:20:57,696 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 05:20:57,696 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 05:20:57,701 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 05:20:57,701 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 05:20:57,701 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 05:20:57,701 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 05:20:57,702 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 05:20:57,702 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 05:20:57,702 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 05:20:57,702 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 05:20:57,703 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 05:20:57,704 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 05:20:57,704 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 05:20:57,705 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 05:20:57,706 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 05:20:57,706 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 05:20:57,706 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 05:20:57,706 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 05:20:57,706 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 05:20:57,707 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 05:20:57,707 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 05:20:57,707 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 05:20:57,707 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-11-07 05:20:58,142 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 05:20:58,176 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 05:20:58,180 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 05:20:58,182 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 05:20:58,182 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 05:20:58,184 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-01-2.i [2020-11-07 05:20:58,284 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f97fbdcaf/55d2391bfd4c408f86ce50966a63196c/FLAG8dfee5645 [2020-11-07 05:20:58,934 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 05:20:58,935 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/sll-01-2.i [2020-11-07 05:20:58,953 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f97fbdcaf/55d2391bfd4c408f86ce50966a63196c/FLAG8dfee5645 [2020-11-07 05:20:59,218 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f97fbdcaf/55d2391bfd4c408f86ce50966a63196c [2020-11-07 05:20:59,227 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 05:20:59,235 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 05:20:59,242 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 05:20:59,242 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 05:20:59,246 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 05:20:59,247 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 05:20:59" (1/1) ... [2020-11-07 05:20:59,251 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a0e3ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:20:59, skipping insertion in model container [2020-11-07 05:20:59,251 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 05:20:59" (1/1) ... [2020-11-07 05:20:59,260 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 05:20:59,310 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 05:20:59,650 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 05:20:59,669 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 05:20:59,768 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 05:20:59,830 INFO L208 MainTranslator]: Completed translation [2020-11-07 05:20:59,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:20:59 WrapperNode [2020-11-07 05:20:59,831 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 05:20:59,832 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 05:20:59,832 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 05:20:59,832 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 05:20:59,851 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:20:59" (1/1) ... [2020-11-07 05:20:59,852 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:20:59" (1/1) ... [2020-11-07 05:20:59,875 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:20:59" (1/1) ... [2020-11-07 05:20:59,878 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:20:59" (1/1) ... [2020-11-07 05:20:59,930 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:20:59" (1/1) ... [2020-11-07 05:20:59,955 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:20:59" (1/1) ... [2020-11-07 05:20:59,963 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:20:59" (1/1) ... [2020-11-07 05:20:59,975 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 05:20:59,976 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 05:20:59,976 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 05:20:59,976 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 05:20:59,977 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:20:59" (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 [2020-11-07 05:21:00,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 05:21:00,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 05:21:00,055 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 05:21:00,056 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 05:21:00,056 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-11-07 05:21:00,056 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-11-07 05:21:00,057 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-11-07 05:21:00,057 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-11-07 05:21:00,057 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-11-07 05:21:00,057 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-11-07 05:21:00,057 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-11-07 05:21:00,057 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-11-07 05:21:00,058 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-11-07 05:21:00,058 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-11-07 05:21:00,058 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-11-07 05:21:00,059 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-11-07 05:21:00,059 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-11-07 05:21:00,059 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-11-07 05:21:00,059 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-11-07 05:21:00,060 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-11-07 05:21:00,060 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-11-07 05:21:00,061 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-11-07 05:21:00,064 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-11-07 05:21:00,064 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-11-07 05:21:00,064 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-11-07 05:21:00,064 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-11-07 05:21:00,064 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-11-07 05:21:00,064 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-11-07 05:21:00,065 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-11-07 05:21:00,065 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-11-07 05:21:00,065 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-11-07 05:21:00,065 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-11-07 05:21:00,065 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-11-07 05:21:00,066 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-11-07 05:21:00,066 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-11-07 05:21:00,066 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-11-07 05:21:00,066 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-11-07 05:21:00,066 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-11-07 05:21:00,066 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-11-07 05:21:00,066 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-11-07 05:21:00,066 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-11-07 05:21:00,067 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-11-07 05:21:00,067 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-11-07 05:21:00,067 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-11-07 05:21:00,067 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-11-07 05:21:00,067 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-11-07 05:21:00,067 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-11-07 05:21:00,067 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-11-07 05:21:00,067 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-11-07 05:21:00,068 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-11-07 05:21:00,068 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-11-07 05:21:00,068 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-11-07 05:21:00,068 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-11-07 05:21:00,068 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-11-07 05:21:00,068 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-11-07 05:21:00,068 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-11-07 05:21:00,069 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-11-07 05:21:00,069 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-11-07 05:21:00,069 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-11-07 05:21:00,069 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-11-07 05:21:00,069 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-11-07 05:21:00,069 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-11-07 05:21:00,070 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-11-07 05:21:00,071 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 05:21:00,071 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-11-07 05:21:00,071 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-11-07 05:21:00,071 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-11-07 05:21:00,071 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-11-07 05:21:00,071 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-11-07 05:21:00,071 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-11-07 05:21:00,072 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-11-07 05:21:00,072 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-11-07 05:21:00,072 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-11-07 05:21:00,072 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-11-07 05:21:00,073 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-11-07 05:21:00,073 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-11-07 05:21:00,073 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-11-07 05:21:00,073 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-11-07 05:21:00,073 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-11-07 05:21:00,073 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-11-07 05:21:00,074 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-11-07 05:21:00,074 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-11-07 05:21:00,075 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-11-07 05:21:00,075 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-11-07 05:21:00,075 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-11-07 05:21:00,076 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-11-07 05:21:00,076 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-11-07 05:21:00,077 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-11-07 05:21:00,077 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-11-07 05:21:00,077 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-11-07 05:21:00,078 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-11-07 05:21:00,078 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-11-07 05:21:00,078 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-11-07 05:21:00,079 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-11-07 05:21:00,079 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-11-07 05:21:00,079 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-11-07 05:21:00,079 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-11-07 05:21:00,079 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-11-07 05:21:00,079 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-11-07 05:21:00,080 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-11-07 05:21:00,080 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-11-07 05:21:00,080 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-11-07 05:21:00,080 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-11-07 05:21:00,080 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-11-07 05:21:00,080 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-11-07 05:21:00,080 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-11-07 05:21:00,081 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-11-07 05:21:00,081 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-07 05:21:00,081 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 05:21:00,081 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-11-07 05:21:00,081 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-11-07 05:21:00,081 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 05:21:00,081 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 05:21:00,081 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 05:21:00,082 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-07 05:21:00,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-07 05:21:00,082 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-07 05:21:00,082 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 05:21:00,082 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 05:21:00,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 05:21:00,082 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 05:21:00,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 05:21:00,083 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 05:21:00,831 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 05:21:00,831 INFO L298 CfgBuilder]: Removed 30 assume(true) statements. [2020-11-07 05:21:00,834 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 05:21:00 BoogieIcfgContainer [2020-11-07 05:21:00,834 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 05:21:00,837 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 05:21:00,837 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 05:21:00,841 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 05:21:00,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 05:20:59" (1/3) ... [2020-11-07 05:21:00,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c60a181 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 05:21:00, skipping insertion in model container [2020-11-07 05:21:00,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:20:59" (2/3) ... [2020-11-07 05:21:00,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c60a181 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 05:21:00, skipping insertion in model container [2020-11-07 05:21:00,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 05:21:00" (3/3) ... [2020-11-07 05:21:00,845 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-01-2.i [2020-11-07 05:21:00,864 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 05:21:00,868 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 05:21:00,883 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 05:21:00,910 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 05:21:00,910 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 05:21:00,911 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-11-07 05:21:00,911 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 05:21:00,911 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 05:21:00,911 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 05:21:00,911 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 05:21:00,911 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 05:21:00,933 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states. [2020-11-07 05:21:00,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-07 05:21:00,944 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:21:00,945 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 05:21:00,945 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:21:00,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:21:00,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1609758844, now seen corresponding path program 1 times [2020-11-07 05:21:00,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:21:00,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1588114990] [2020-11-07 05:21:00,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:21:01,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:21:01,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:21:01,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:21:01,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:21:01,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1588114990] [2020-11-07 05:21:01,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:21:01,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-07 05:21:01,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884600446] [2020-11-07 05:21:01,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-07 05:21:01,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:21:01,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-07 05:21:01,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-07 05:21:01,284 INFO L87 Difference]: Start difference. First operand 181 states. Second operand 5 states. [2020-11-07 05:21:01,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:21:01,842 INFO L93 Difference]: Finished difference Result 358 states and 505 transitions. [2020-11-07 05:21:01,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-07 05:21:01,844 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-11-07 05:21:01,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:21:01,856 INFO L225 Difference]: With dead ends: 358 [2020-11-07 05:21:01,857 INFO L226 Difference]: Without dead ends: 186 [2020-11-07 05:21:01,863 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 [2020-11-07 05:21:01,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-11-07 05:21:01,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 159. [2020-11-07 05:21:01,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-11-07 05:21:01,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 180 transitions. [2020-11-07 05:21:01,941 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 180 transitions. Word has length 18 [2020-11-07 05:21:01,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:21:01,942 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 180 transitions. [2020-11-07 05:21:01,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-07 05:21:01,942 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 180 transitions. [2020-11-07 05:21:01,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-07 05:21:01,946 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:21:01,946 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] [2020-11-07 05:21:01,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 05:21:01,947 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:21:01,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:21:01,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1384880224, now seen corresponding path program 1 times [2020-11-07 05:21:01,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:21:01,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [995556627] [2020-11-07 05:21:01,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:21:02,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:21:02,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:21:02,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:21:02,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:21:02,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [995556627] [2020-11-07 05:21:02,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:21:02,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 05:21:02,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110891076] [2020-11-07 05:21:02,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 05:21:02,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:21:02,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 05:21:02,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 05:21:02,140 INFO L87 Difference]: Start difference. First operand 159 states and 180 transitions. Second operand 4 states. [2020-11-07 05:21:02,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:21:02,470 INFO L93 Difference]: Finished difference Result 167 states and 188 transitions. [2020-11-07 05:21:02,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 05:21:02,471 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-11-07 05:21:02,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:21:02,473 INFO L225 Difference]: With dead ends: 167 [2020-11-07 05:21:02,473 INFO L226 Difference]: Without dead ends: 160 [2020-11-07 05:21:02,474 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 05:21:02,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-11-07 05:21:02,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2020-11-07 05:21:02,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-11-07 05:21:02,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 181 transitions. [2020-11-07 05:21:02,496 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 181 transitions. Word has length 30 [2020-11-07 05:21:02,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:21:02,497 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 181 transitions. [2020-11-07 05:21:02,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 05:21:02,497 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 181 transitions. [2020-11-07 05:21:02,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-07 05:21:02,498 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:21:02,499 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 05:21:02,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 05:21:02,499 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:21:02,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:21:02,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1492035453, now seen corresponding path program 1 times [2020-11-07 05:21:02,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:21:02,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2074664021] [2020-11-07 05:21:02,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:21:02,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:21:02,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:21:02,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:21:02,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:21:02,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2074664021] [2020-11-07 05:21:02,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:21:02,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-07 05:21:02,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463539207] [2020-11-07 05:21:02,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 05:21:02,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:21:02,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 05:21:02,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-11-07 05:21:02,646 INFO L87 Difference]: Start difference. First operand 160 states and 181 transitions. Second operand 8 states. [2020-11-07 05:21:03,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:21:03,298 INFO L93 Difference]: Finished difference Result 249 states and 284 transitions. [2020-11-07 05:21:03,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-07 05:21:03,299 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-11-07 05:21:03,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:21:03,301 INFO L225 Difference]: With dead ends: 249 [2020-11-07 05:21:03,302 INFO L226 Difference]: Without dead ends: 242 [2020-11-07 05:21:03,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-11-07 05:21:03,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-11-07 05:21:03,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 155. [2020-11-07 05:21:03,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-11-07 05:21:03,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 175 transitions. [2020-11-07 05:21:03,327 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 175 transitions. Word has length 32 [2020-11-07 05:21:03,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:21:03,327 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 175 transitions. [2020-11-07 05:21:03,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 05:21:03,327 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 175 transitions. [2020-11-07 05:21:03,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-07 05:21:03,329 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:21:03,329 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] [2020-11-07 05:21:03,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 05:21:03,329 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:21:03,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:21:03,330 INFO L82 PathProgramCache]: Analyzing trace with hash -66764841, now seen corresponding path program 1 times [2020-11-07 05:21:03,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:21:03,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [885407579] [2020-11-07 05:21:03,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:21:03,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:21:03,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:21:03,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:21:03,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:21:03,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [885407579] [2020-11-07 05:21:03,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:21:03,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 05:21:03,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900562729] [2020-11-07 05:21:03,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 05:21:03,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:21:03,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 05:21:03,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-07 05:21:03,434 INFO L87 Difference]: Start difference. First operand 155 states and 175 transitions. Second operand 6 states. [2020-11-07 05:21:04,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:21:04,108 INFO L93 Difference]: Finished difference Result 362 states and 415 transitions. [2020-11-07 05:21:04,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 05:21:04,108 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2020-11-07 05:21:04,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:21:04,110 INFO L225 Difference]: With dead ends: 362 [2020-11-07 05:21:04,111 INFO L226 Difference]: Without dead ends: 241 [2020-11-07 05:21:04,114 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-11-07 05:21:04,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-11-07 05:21:04,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 158. [2020-11-07 05:21:04,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-11-07 05:21:04,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 178 transitions. [2020-11-07 05:21:04,166 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 178 transitions. Word has length 38 [2020-11-07 05:21:04,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:21:04,166 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 178 transitions. [2020-11-07 05:21:04,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 05:21:04,166 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 178 transitions. [2020-11-07 05:21:04,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-11-07 05:21:04,172 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:21:04,172 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] [2020-11-07 05:21:04,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 05:21:04,172 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:21:04,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:21:04,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1112940044, now seen corresponding path program 1 times [2020-11-07 05:21:04,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:21:04,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1981869164] [2020-11-07 05:21:04,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:21:04,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:21:04,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:21:04,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:21:04,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:21:04,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1981869164] [2020-11-07 05:21:04,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:21:04,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 05:21:04,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758900441] [2020-11-07 05:21:04,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 05:21:04,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:21:04,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 05:21:04,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-07 05:21:04,339 INFO L87 Difference]: Start difference. First operand 158 states and 178 transitions. Second operand 6 states. [2020-11-07 05:21:04,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:21:04,845 INFO L93 Difference]: Finished difference Result 260 states and 296 transitions. [2020-11-07 05:21:04,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-07 05:21:04,846 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 40 [2020-11-07 05:21:04,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:21:04,851 INFO L225 Difference]: With dead ends: 260 [2020-11-07 05:21:04,851 INFO L226 Difference]: Without dead ends: 229 [2020-11-07 05:21:04,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-11-07 05:21:04,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-11-07 05:21:04,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 158. [2020-11-07 05:21:04,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-11-07 05:21:04,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 177 transitions. [2020-11-07 05:21:04,877 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 177 transitions. Word has length 40 [2020-11-07 05:21:04,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:21:04,879 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 177 transitions. [2020-11-07 05:21:04,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 05:21:04,879 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 177 transitions. [2020-11-07 05:21:04,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-11-07 05:21:04,882 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:21:04,882 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] [2020-11-07 05:21:04,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-07 05:21:04,883 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:21:04,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:21:04,884 INFO L82 PathProgramCache]: Analyzing trace with hash 232926315, now seen corresponding path program 1 times [2020-11-07 05:21:04,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:21:04,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [310270477] [2020-11-07 05:21:04,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:21:04,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:21:05,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:21:05,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:21:05,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:21:05,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [310270477] [2020-11-07 05:21:05,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:21:05,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-07 05:21:05,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219883428] [2020-11-07 05:21:05,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-07 05:21:05,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:21:05,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-07 05:21:05,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-07 05:21:05,086 INFO L87 Difference]: Start difference. First operand 158 states and 177 transitions. Second operand 7 states. [2020-11-07 05:21:05,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:21:05,851 INFO L93 Difference]: Finished difference Result 238 states and 269 transitions. [2020-11-07 05:21:05,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-07 05:21:05,852 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 44 [2020-11-07 05:21:05,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:21:05,857 INFO L225 Difference]: With dead ends: 238 [2020-11-07 05:21:05,858 INFO L226 Difference]: Without dead ends: 233 [2020-11-07 05:21:05,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-11-07 05:21:05,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-11-07 05:21:05,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 156. [2020-11-07 05:21:05,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-11-07 05:21:05,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 173 transitions. [2020-11-07 05:21:05,889 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 173 transitions. Word has length 44 [2020-11-07 05:21:05,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:21:05,889 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 173 transitions. [2020-11-07 05:21:05,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-07 05:21:05,890 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 173 transitions. [2020-11-07 05:21:05,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-07 05:21:05,897 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:21:05,898 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] [2020-11-07 05:21:05,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-07 05:21:05,898 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:21:05,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:21:05,899 INFO L82 PathProgramCache]: Analyzing trace with hash 439633619, now seen corresponding path program 1 times [2020-11-07 05:21:05,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:21:05,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [432491416] [2020-11-07 05:21:05,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:21:05,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:21:05,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:21:05,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:21:05,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:21:05,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [432491416] [2020-11-07 05:21:05,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:21:05,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 05:21:05,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86774091] [2020-11-07 05:21:05,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 05:21:05,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:21:05,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 05:21:05,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 05:21:05,980 INFO L87 Difference]: Start difference. First operand 156 states and 173 transitions. Second operand 4 states. [2020-11-07 05:21:06,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:21:06,330 INFO L93 Difference]: Finished difference Result 259 states and 295 transitions. [2020-11-07 05:21:06,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 05:21:06,331 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-11-07 05:21:06,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:21:06,335 INFO L225 Difference]: With dead ends: 259 [2020-11-07 05:21:06,336 INFO L226 Difference]: Without dead ends: 192 [2020-11-07 05:21:06,338 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 05:21:06,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-11-07 05:21:06,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 159. [2020-11-07 05:21:06,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-11-07 05:21:06,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 177 transitions. [2020-11-07 05:21:06,363 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 177 transitions. Word has length 48 [2020-11-07 05:21:06,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:21:06,364 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 177 transitions. [2020-11-07 05:21:06,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 05:21:06,364 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 177 transitions. [2020-11-07 05:21:06,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-11-07 05:21:06,368 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:21:06,370 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] [2020-11-07 05:21:06,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-07 05:21:06,371 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:21:06,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:21:06,372 INFO L82 PathProgramCache]: Analyzing trace with hash 824217848, now seen corresponding path program 1 times [2020-11-07 05:21:06,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:21:06,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [812431788] [2020-11-07 05:21:06,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:21:06,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:21:06,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:21:06,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:21:06,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:21:06,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [812431788] [2020-11-07 05:21:06,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:21:06,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 05:21:06,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946678970] [2020-11-07 05:21:06,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 05:21:06,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:21:06,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 05:21:06,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 05:21:06,503 INFO L87 Difference]: Start difference. First operand 159 states and 177 transitions. Second operand 4 states. [2020-11-07 05:21:06,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:21:06,831 INFO L93 Difference]: Finished difference Result 162 states and 179 transitions. [2020-11-07 05:21:06,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 05:21:06,831 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 50 [2020-11-07 05:21:06,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:21:06,834 INFO L225 Difference]: With dead ends: 162 [2020-11-07 05:21:06,834 INFO L226 Difference]: Without dead ends: 158 [2020-11-07 05:21:06,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 05:21:06,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-11-07 05:21:06,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2020-11-07 05:21:06,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-11-07 05:21:06,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 175 transitions. [2020-11-07 05:21:06,860 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 175 transitions. Word has length 50 [2020-11-07 05:21:06,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:21:06,861 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 175 transitions. [2020-11-07 05:21:06,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 05:21:06,861 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 175 transitions. [2020-11-07 05:21:06,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-11-07 05:21:06,863 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:21:06,863 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] [2020-11-07 05:21:06,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-07 05:21:06,865 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:21:06,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:21:06,865 INFO L82 PathProgramCache]: Analyzing trace with hash -817730258, now seen corresponding path program 1 times [2020-11-07 05:21:06,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:21:06,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [861695316] [2020-11-07 05:21:06,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:21:06,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:21:07,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:21:07,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:21:07,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:21:07,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [861695316] [2020-11-07 05:21:07,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:21:07,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-11-07 05:21:07,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034679500] [2020-11-07 05:21:07,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-07 05:21:07,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:21:07,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-07 05:21:07,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-11-07 05:21:07,097 INFO L87 Difference]: Start difference. First operand 158 states and 175 transitions. Second operand 9 states. [2020-11-07 05:21:07,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:21:07,945 INFO L93 Difference]: Finished difference Result 345 states and 390 transitions. [2020-11-07 05:21:07,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-07 05:21:07,946 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 54 [2020-11-07 05:21:07,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:21:07,948 INFO L225 Difference]: With dead ends: 345 [2020-11-07 05:21:07,948 INFO L226 Difference]: Without dead ends: 276 [2020-11-07 05:21:07,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2020-11-07 05:21:07,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-11-07 05:21:07,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 177. [2020-11-07 05:21:07,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-11-07 05:21:07,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 195 transitions. [2020-11-07 05:21:07,984 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 195 transitions. Word has length 54 [2020-11-07 05:21:07,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:21:07,986 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 195 transitions. [2020-11-07 05:21:07,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-07 05:21:07,986 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 195 transitions. [2020-11-07 05:21:07,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-07 05:21:07,987 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:21:07,988 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] [2020-11-07 05:21:07,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-07 05:21:07,988 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:21:07,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:21:07,989 INFO L82 PathProgramCache]: Analyzing trace with hash -419961564, now seen corresponding path program 1 times [2020-11-07 05:21:07,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:21:07,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [757534651] [2020-11-07 05:21:07,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:21:08,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:21:08,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:21:08,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:21:08,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:21:08,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [757534651] [2020-11-07 05:21:08,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:21:08,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 05:21:08,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676824801] [2020-11-07 05:21:08,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 05:21:08,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:21:08,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 05:21:08,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 05:21:08,102 INFO L87 Difference]: Start difference. First operand 177 states and 195 transitions. Second operand 4 states. [2020-11-07 05:21:08,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:21:08,408 INFO L93 Difference]: Finished difference Result 185 states and 203 transitions. [2020-11-07 05:21:08,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 05:21:08,409 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2020-11-07 05:21:08,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:21:08,411 INFO L225 Difference]: With dead ends: 185 [2020-11-07 05:21:08,412 INFO L226 Difference]: Without dead ends: 178 [2020-11-07 05:21:08,414 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 05:21:08,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-11-07 05:21:08,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2020-11-07 05:21:08,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-11-07 05:21:08,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 196 transitions. [2020-11-07 05:21:08,448 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 196 transitions. Word has length 58 [2020-11-07 05:21:08,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:21:08,448 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 196 transitions. [2020-11-07 05:21:08,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 05:21:08,449 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 196 transitions. [2020-11-07 05:21:08,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-11-07 05:21:08,449 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:21:08,450 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] [2020-11-07 05:21:08,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-07 05:21:08,450 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:21:08,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:21:08,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1529988056, now seen corresponding path program 1 times [2020-11-07 05:21:08,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:21:08,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [996137618] [2020-11-07 05:21:08,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:21:08,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:21:08,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:21:08,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:21:08,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-07 05:21:08,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [996137618] [2020-11-07 05:21:08,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:21:08,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-07 05:21:08,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657371017] [2020-11-07 05:21:08,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 05:21:08,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:21:08,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 05:21:08,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-11-07 05:21:08,614 INFO L87 Difference]: Start difference. First operand 178 states and 196 transitions. Second operand 8 states. [2020-11-07 05:21:09,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:21:09,225 INFO L93 Difference]: Finished difference Result 263 states and 293 transitions. [2020-11-07 05:21:09,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-07 05:21:09,226 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 59 [2020-11-07 05:21:09,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:21:09,229 INFO L225 Difference]: With dead ends: 263 [2020-11-07 05:21:09,230 INFO L226 Difference]: Without dead ends: 233 [2020-11-07 05:21:09,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-11-07 05:21:09,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-11-07 05:21:09,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 217. [2020-11-07 05:21:09,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-11-07 05:21:09,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 243 transitions. [2020-11-07 05:21:09,266 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 243 transitions. Word has length 59 [2020-11-07 05:21:09,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:21:09,266 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 243 transitions. [2020-11-07 05:21:09,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 05:21:09,267 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 243 transitions. [2020-11-07 05:21:09,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-11-07 05:21:09,268 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:21:09,268 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] [2020-11-07 05:21:09,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-07 05:21:09,268 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:21:09,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:21:09,269 INFO L82 PathProgramCache]: Analyzing trace with hash 184861191, now seen corresponding path program 1 times [2020-11-07 05:21:09,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:21:09,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1623578441] [2020-11-07 05:21:09,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:21:09,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:21:09,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:21:09,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:21:09,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:21:09,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1623578441] [2020-11-07 05:21:09,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:21:09,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-11-07 05:21:09,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545800086] [2020-11-07 05:21:09,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-07 05:21:09,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:21:09,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-07 05:21:09,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-11-07 05:21:09,873 INFO L87 Difference]: Start difference. First operand 217 states and 243 transitions. Second operand 14 states. [2020-11-07 05:21:12,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:21:12,353 INFO L93 Difference]: Finished difference Result 637 states and 723 transitions. [2020-11-07 05:21:12,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-07 05:21:12,354 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 59 [2020-11-07 05:21:12,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:21:12,358 INFO L225 Difference]: With dead ends: 637 [2020-11-07 05:21:12,358 INFO L226 Difference]: Without dead ends: 632 [2020-11-07 05:21:12,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=252, Invalid=804, Unknown=0, NotChecked=0, Total=1056 [2020-11-07 05:21:12,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2020-11-07 05:21:12,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 236. [2020-11-07 05:21:12,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-11-07 05:21:12,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 264 transitions. [2020-11-07 05:21:12,418 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 264 transitions. Word has length 59 [2020-11-07 05:21:12,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:21:12,418 INFO L481 AbstractCegarLoop]: Abstraction has 236 states and 264 transitions. [2020-11-07 05:21:12,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-07 05:21:12,419 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 264 transitions. [2020-11-07 05:21:12,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-11-07 05:21:12,420 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:21:12,420 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] [2020-11-07 05:21:12,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-07 05:21:12,420 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:21:12,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:21:12,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1994540127, now seen corresponding path program 1 times [2020-11-07 05:21:12,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:21:12,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [661932383] [2020-11-07 05:21:12,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:21:12,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:21:12,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:21:12,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:21:12,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:21:12,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [661932383] [2020-11-07 05:21:12,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:21:12,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-07 05:21:12,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282174175] [2020-11-07 05:21:12,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 05:21:12,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:21:12,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 05:21:12,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-11-07 05:21:12,540 INFO L87 Difference]: Start difference. First operand 236 states and 264 transitions. Second operand 8 states. [2020-11-07 05:21:13,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:21:13,208 INFO L93 Difference]: Finished difference Result 258 states and 287 transitions. [2020-11-07 05:21:13,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-07 05:21:13,208 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 60 [2020-11-07 05:21:13,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:21:13,210 INFO L225 Difference]: With dead ends: 258 [2020-11-07 05:21:13,210 INFO L226 Difference]: Without dead ends: 251 [2020-11-07 05:21:13,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2020-11-07 05:21:13,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-11-07 05:21:13,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 231. [2020-11-07 05:21:13,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-11-07 05:21:13,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 258 transitions. [2020-11-07 05:21:13,269 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 258 transitions. Word has length 60 [2020-11-07 05:21:13,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:21:13,270 INFO L481 AbstractCegarLoop]: Abstraction has 231 states and 258 transitions. [2020-11-07 05:21:13,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 05:21:13,270 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 258 transitions. [2020-11-07 05:21:13,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-07 05:21:13,271 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:21:13,271 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, 1, 1, 1] [2020-11-07 05:21:13,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-07 05:21:13,271 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:21:13,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:21:13,272 INFO L82 PathProgramCache]: Analyzing trace with hash -215686495, now seen corresponding path program 1 times [2020-11-07 05:21:13,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:21:13,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1833406037] [2020-11-07 05:21:13,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:21:13,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:21:13,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:21:13,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:21:13,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:21:13,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1833406037] [2020-11-07 05:21:13,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:21:13,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-11-07 05:21:13,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063451590] [2020-11-07 05:21:13,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-07 05:21:13,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:21:13,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-07 05:21:13,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-11-07 05:21:13,781 INFO L87 Difference]: Start difference. First operand 231 states and 258 transitions. Second operand 15 states. [2020-11-07 05:21:16,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:21:16,407 INFO L93 Difference]: Finished difference Result 625 states and 708 transitions. [2020-11-07 05:21:16,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-07 05:21:16,407 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 63 [2020-11-07 05:21:16,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:21:16,413 INFO L225 Difference]: With dead ends: 625 [2020-11-07 05:21:16,413 INFO L226 Difference]: Without dead ends: 620 [2020-11-07 05:21:16,415 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=272, Invalid=850, Unknown=0, NotChecked=0, Total=1122 [2020-11-07 05:21:16,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2020-11-07 05:21:16,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 235. [2020-11-07 05:21:16,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-11-07 05:21:16,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 262 transitions. [2020-11-07 05:21:16,482 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 262 transitions. Word has length 63 [2020-11-07 05:21:16,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:21:16,482 INFO L481 AbstractCegarLoop]: Abstraction has 235 states and 262 transitions. [2020-11-07 05:21:16,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-07 05:21:16,482 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 262 transitions. [2020-11-07 05:21:16,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-11-07 05:21:16,490 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:21:16,490 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, 1, 1, 1, 1] [2020-11-07 05:21:16,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-07 05:21:16,491 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:21:16,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:21:16,493 INFO L82 PathProgramCache]: Analyzing trace with hash -233861473, now seen corresponding path program 1 times [2020-11-07 05:21:16,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:21:16,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2043032601] [2020-11-07 05:21:16,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:21:16,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:21:16,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:21:16,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:21:16,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-07 05:21:16,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2043032601] [2020-11-07 05:21:16,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:21:16,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 05:21:16,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656828346] [2020-11-07 05:21:16,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 05:21:16,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:21:16,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 05:21:16,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 05:21:16,564 INFO L87 Difference]: Start difference. First operand 235 states and 262 transitions. Second operand 4 states. [2020-11-07 05:21:16,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:21:16,977 INFO L93 Difference]: Finished difference Result 243 states and 269 transitions. [2020-11-07 05:21:16,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 05:21:16,978 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2020-11-07 05:21:16,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:21:16,980 INFO L225 Difference]: With dead ends: 243 [2020-11-07 05:21:16,980 INFO L226 Difference]: Without dead ends: 239 [2020-11-07 05:21:16,980 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 05:21:16,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-11-07 05:21:17,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 234. [2020-11-07 05:21:17,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-11-07 05:21:17,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 260 transitions. [2020-11-07 05:21:17,042 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 260 transitions. Word has length 64 [2020-11-07 05:21:17,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:21:17,042 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 260 transitions. [2020-11-07 05:21:17,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 05:21:17,043 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 260 transitions. [2020-11-07 05:21:17,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-11-07 05:21:17,044 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:21:17,044 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-11-07 05:21:17,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-11-07 05:21:17,044 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:21:17,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:21:17,045 INFO L82 PathProgramCache]: Analyzing trace with hash 906480798, now seen corresponding path program 1 times [2020-11-07 05:21:17,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:21:17,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1229126308] [2020-11-07 05:21:17,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:21:17,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:21:17,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:21:17,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:21:17,160 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:21:17,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1229126308] [2020-11-07 05:21:17,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 05:21:17,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-11-07 05:21:17,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110522465] [2020-11-07 05:21:17,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-07 05:21:17,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:21:17,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-07 05:21:17,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-07 05:21:17,163 INFO L87 Difference]: Start difference. First operand 234 states and 260 transitions. Second operand 7 states. [2020-11-07 05:21:17,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:21:17,866 INFO L93 Difference]: Finished difference Result 378 states and 425 transitions. [2020-11-07 05:21:17,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-07 05:21:17,867 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 65 [2020-11-07 05:21:17,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:21:17,868 INFO L225 Difference]: With dead ends: 378 [2020-11-07 05:21:17,868 INFO L226 Difference]: Without dead ends: 271 [2020-11-07 05:21:17,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-11-07 05:21:17,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-11-07 05:21:17,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 234. [2020-11-07 05:21:17,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-11-07 05:21:17,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 258 transitions. [2020-11-07 05:21:17,925 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 258 transitions. Word has length 65 [2020-11-07 05:21:17,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:21:17,925 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 258 transitions. [2020-11-07 05:21:17,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-07 05:21:17,925 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 258 transitions. [2020-11-07 05:21:17,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-11-07 05:21:17,926 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:21:17,926 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 05:21:17,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-11-07 05:21:17,926 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:21:17,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:21:17,927 INFO L82 PathProgramCache]: Analyzing trace with hash 894248917, now seen corresponding path program 1 times [2020-11-07 05:21:17,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:21:17,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [886979941] [2020-11-07 05:21:17,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:21:17,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:21:18,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:21:18,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:21:18,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:21:18,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [886979941] [2020-11-07 05:21:18,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 05:21:18,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-11-07 05:21:18,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707882330] [2020-11-07 05:21:18,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-07 05:21:18,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:21:18,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-07 05:21:18,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-11-07 05:21:18,087 INFO L87 Difference]: Start difference. First operand 234 states and 258 transitions. Second operand 9 states. [2020-11-07 05:21:19,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:21:19,233 INFO L93 Difference]: Finished difference Result 490 states and 547 transitions. [2020-11-07 05:21:19,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-07 05:21:19,234 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 68 [2020-11-07 05:21:19,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:21:19,236 INFO L225 Difference]: With dead ends: 490 [2020-11-07 05:21:19,236 INFO L226 Difference]: Without dead ends: 422 [2020-11-07 05:21:19,238 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-11-07 05:21:19,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2020-11-07 05:21:19,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 320. [2020-11-07 05:21:19,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2020-11-07 05:21:19,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 357 transitions. [2020-11-07 05:21:19,343 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 357 transitions. Word has length 68 [2020-11-07 05:21:19,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:21:19,343 INFO L481 AbstractCegarLoop]: Abstraction has 320 states and 357 transitions. [2020-11-07 05:21:19,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-07 05:21:19,344 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 357 transitions. [2020-11-07 05:21:19,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-11-07 05:21:19,345 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:21:19,345 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 05:21:19,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-11-07 05:21:19,346 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:21:19,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:21:19,346 INFO L82 PathProgramCache]: Analyzing trace with hash -680181352, now seen corresponding path program 1 times [2020-11-07 05:21:19,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:21:19,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1342026686] [2020-11-07 05:21:19,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:21:19,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:21:19,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:21:19,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:21:19,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:21:19,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1342026686] [2020-11-07 05:21:19,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:21:19,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 05:21:19,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489303888] [2020-11-07 05:21:19,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 05:21:19,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:21:19,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 05:21:19,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 05:21:19,431 INFO L87 Difference]: Start difference. First operand 320 states and 357 transitions. Second operand 4 states. [2020-11-07 05:21:19,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:21:19,942 INFO L93 Difference]: Finished difference Result 560 states and 644 transitions. [2020-11-07 05:21:19,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 05:21:19,943 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-11-07 05:21:19,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:21:19,946 INFO L225 Difference]: With dead ends: 560 [2020-11-07 05:21:19,946 INFO L226 Difference]: Without dead ends: 426 [2020-11-07 05:21:19,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 05:21:19,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-11-07 05:21:20,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 369. [2020-11-07 05:21:20,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 369 states. [2020-11-07 05:21:20,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 415 transitions. [2020-11-07 05:21:20,088 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 415 transitions. Word has length 70 [2020-11-07 05:21:20,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:21:20,088 INFO L481 AbstractCegarLoop]: Abstraction has 369 states and 415 transitions. [2020-11-07 05:21:20,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 05:21:20,088 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 415 transitions. [2020-11-07 05:21:20,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-11-07 05:21:20,090 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:21:20,090 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-11-07 05:21:20,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-11-07 05:21:20,090 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:21:20,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:21:20,091 INFO L82 PathProgramCache]: Analyzing trace with hash -266651992, now seen corresponding path program 1 times [2020-11-07 05:21:20,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:21:20,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1010797325] [2020-11-07 05:21:20,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:21:20,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:21:20,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:21:20,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:21:20,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:21:20,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1010797325] [2020-11-07 05:21:20,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 05:21:20,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-11-07 05:21:20,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221317032] [2020-11-07 05:21:20,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-07 05:21:20,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:21:20,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-07 05:21:20,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-11-07 05:21:20,340 INFO L87 Difference]: Start difference. First operand 369 states and 415 transitions. Second operand 10 states. [2020-11-07 05:21:21,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:21:21,582 INFO L93 Difference]: Finished difference Result 600 states and 682 transitions. [2020-11-07 05:21:21,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-07 05:21:21,583 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 73 [2020-11-07 05:21:21,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:21:21,586 INFO L225 Difference]: With dead ends: 600 [2020-11-07 05:21:21,586 INFO L226 Difference]: Without dead ends: 539 [2020-11-07 05:21:21,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2020-11-07 05:21:21,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2020-11-07 05:21:21,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 416. [2020-11-07 05:21:21,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 416 states. [2020-11-07 05:21:21,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 470 transitions. [2020-11-07 05:21:21,724 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 470 transitions. Word has length 73 [2020-11-07 05:21:21,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:21:21,724 INFO L481 AbstractCegarLoop]: Abstraction has 416 states and 470 transitions. [2020-11-07 05:21:21,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-07 05:21:21,725 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 470 transitions. [2020-11-07 05:21:21,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-11-07 05:21:21,726 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:21:21,726 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2020-11-07 05:21:21,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-11-07 05:21:21,727 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:21:21,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:21:21,727 INFO L82 PathProgramCache]: Analyzing trace with hash -2064139585, now seen corresponding path program 1 times [2020-11-07 05:21:21,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:21:21,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [581253543] [2020-11-07 05:21:21,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:21:21,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 05:21:21,750 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 05:21:21,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 05:21:21,769 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 05:21:21,815 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-11-07 05:21:21,815 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-07 05:21:21,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-11-07 05:21:21,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 05:21:21 BoogieIcfgContainer [2020-11-07 05:21:21,928 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 05:21:21,932 INFO L168 Benchmark]: Toolchain (without parser) took 22701.54 ms. Allocated memory was 151.0 MB in the beginning and 377.5 MB in the end (delta: 226.5 MB). Free memory was 126.6 MB in the beginning and 234.1 MB in the end (delta: -107.5 MB). Peak memory consumption was 119.5 MB. Max. memory is 8.0 GB. [2020-11-07 05:21:21,932 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 151.0 MB. Free memory was 126.5 MB in the beginning and 126.4 MB in the end (delta: 79.4 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 05:21:21,935 INFO L168 Benchmark]: CACSL2BoogieTranslator took 588.95 ms. Allocated memory is still 151.0 MB. Free memory was 125.9 MB in the beginning and 103.3 MB in the end (delta: 22.7 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2020-11-07 05:21:21,936 INFO L168 Benchmark]: Boogie Preprocessor took 143.06 ms. Allocated memory is still 151.0 MB. Free memory was 103.3 MB in the beginning and 133.2 MB in the end (delta: -29.9 MB). Peak memory consumption was 5.5 MB. Max. memory is 8.0 GB. [2020-11-07 05:21:21,937 INFO L168 Benchmark]: RCFGBuilder took 858.73 ms. Allocated memory is still 151.0 MB. Free memory was 132.6 MB in the beginning and 126.9 MB in the end (delta: 5.7 MB). Peak memory consumption was 59.8 MB. Max. memory is 8.0 GB. [2020-11-07 05:21:21,937 INFO L168 Benchmark]: TraceAbstraction took 21092.45 ms. Allocated memory was 151.0 MB in the beginning and 377.5 MB in the end (delta: 226.5 MB). Free memory was 126.4 MB in the beginning and 234.1 MB in the end (delta: -107.7 MB). Peak memory consumption was 118.2 MB. Max. memory is 8.0 GB. [2020-11-07 05:21:21,944 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 151.0 MB. Free memory was 126.5 MB in the beginning and 126.4 MB in the end (delta: 79.4 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 588.95 ms. Allocated memory is still 151.0 MB. Free memory was 125.9 MB in the beginning and 103.3 MB in the end (delta: 22.7 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 143.06 ms. Allocated memory is still 151.0 MB. Free memory was 103.3 MB in the beginning and 133.2 MB in the end (delta: -29.9 MB). Peak memory consumption was 5.5 MB. Max. memory is 8.0 GB. * RCFGBuilder took 858.73 ms. Allocated memory is still 151.0 MB. Free memory was 132.6 MB in the beginning and 126.9 MB in the end (delta: 5.7 MB). Peak memory consumption was 59.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 21092.45 ms. Allocated memory was 151.0 MB in the beginning and 377.5 MB in the end (delta: 226.5 MB). Free memory was 126.4 MB in the beginning and 234.1 MB in the end (delta: -107.7 MB). Peak memory consumption was 118.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 992]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L1002] SLL* list = malloc(sizeof(SLL)); VAL [list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1003] list->next = ((void*)0) VAL [list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1004] COND FALSE !(!(list != ((void*)0))) VAL [list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1004] COND FALSE !(__VERIFIER_nondet_int()) VAL [__VERIFIER_nondet_int()=0, list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1004] list->inner = malloc(sizeof(SLL)) VAL [list={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1004] EXPR list->inner VAL [list={-1:0}, list->inner={-2:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1004] list->inner->next = ((void*)0) VAL [list={-1:0}, list->inner={-2:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1004] EXPR list->inner VAL [list={-1:0}, list->inner={-2:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1004] list->inner->inner = ((void*)0) VAL [list={-1:0}, list->inner={-2:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1004] EXPR list->inner VAL [list={-1:0}, list->inner={-2:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1004] EXPR list->inner != ((void*)0) || list->inner == ((void*)0) VAL [list={-1:0}, list->inner={-2:0}, list->inner != ((void*)0) || list->inner == ((void*)0)=1, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1004] COND FALSE !(!(list->inner != ((void*)0) || list->inner == ((void*)0))) VAL [list={-1:0}, list->inner={-2:0}, list->inner != ((void*)0) || list->inner == ((void*)0)=1, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1006] SLL* end = list; VAL [end={-1:0}, list={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1009] COND FALSE !(__VERIFIER_nondet_int()) VAL [__VERIFIER_nondet_int()=0, end={-1:0}, list={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1019] end = ((void*)0) VAL [end={0:0}, list={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1020] end = list VAL [end={-1:0}, list={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1023] COND FALSE !(!(((void*)0) != end)) VAL [end={-1:0}, list={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1025] COND TRUE ((void*)0) != end VAL [end={-1:0}, list={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1027] int len = 0; VAL [end={-1:0}, len=0, list={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1028] EXPR end->inner VAL [end={-1:0}, end->inner={-2:0}, len=0, list={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1028] SLL* inner = end->inner; VAL [end={-1:0}, end->inner={-2:0}, inner={-2:0}, len=0, list={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1029] COND TRUE ((void*)0) != inner VAL [end={-1:0}, inner={-2:0}, len=0, list={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1031] COND TRUE len == 0 VAL [end={-1:0}, inner={-2:0}, len=0, list={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1032] len = 1 VAL [end={-1:0}, inner={-2:0}, len=1, list={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1035] COND FALSE !(!(((void*)0) != inner)) VAL [end={-1:0}, inner={-2:0}, len=1, list={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1036] EXPR inner->inner VAL [end={-1:0}, inner={-2:0}, inner->inner={0:0}, len=1, list={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1036] COND FALSE !(!(((void*)0) == inner->inner)) VAL [end={-1:0}, inner={-2:0}, inner->inner={0:0}, len=1, list={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1037] EXPR inner->next VAL [end={-1:0}, inner={-2:0}, inner->next={0:0}, len=1, list={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1037] COND FALSE !(!(((void*)0) == inner->next)) VAL [end={-1:0}, inner={-2:0}, inner->next={0:0}, len=1, list={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1038] EXPR inner->inner VAL [end={-1:0}, inner={-2:0}, inner->inner={0:0}, len=1, list={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1038] inner = inner->inner VAL [end={-1:0}, inner={0:0}, inner->inner={0:0}, len=1, list={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1039] COND TRUE len == 1 VAL [end={-1:0}, inner={0:0}, len=1, list={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1040] EXPR inner->inner VAL [end={-1:0}, inner={0:0}, inner->inner={54:-7}, len=1, list={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1040] inner = inner->inner VAL [end={-1:0}, inner={54:-7}, inner->inner={54:-7}, len=1, list={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1029] COND TRUE ((void*)0) != inner VAL [end={-1:0}, inner={54:-7}, len=1, list={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1031] COND FALSE !(len == 0) VAL [end={-1:0}, inner={54:-7}, len=1, list={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1034] len = 2 VAL [end={-1:0}, inner={54:-7}, len=2, list={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1035] COND FALSE !(!(((void*)0) != inner)) VAL [end={-1:0}, inner={54:-7}, len=2, list={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1036] EXPR inner->inner VAL [end={-1:0}, inner={54:-7}, inner->inner={58:50}, len=2, list={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1036] COND TRUE !(((void*)0) == inner->inner) VAL [end={-1:0}, inner={54:-7}, inner->inner={58:50}, len=2, list={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1036] CALL reach_error() [L992] COND FALSE !(0) [L992] __assert_fail ("0", "sll-01-2.c", 12, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 181 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 20.9s, OverallIterations: 20, TraceHistogramMax: 2, AutomataDifference: 15.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 3286 SDtfs, 4764 SDslu, 9883 SDs, 0 SdLazy, 6964 SolverSat, 430 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 8.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 258 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 4.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=416occurred in iteration=19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.0s AutomataMinimizationTime, 19 MinimizatonAttempts, 1618 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 2.8s InterpolantComputationTime, 1072 NumberOfCodeBlocks, 1072 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 974 ConstructedInterpolants, 0 QuantifiedInterpolants, 366599 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 19 InterpolantComputations, 16 PerfectInterpolantSequences, 12/16 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...