/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/list-ext3-properties/sll_nondet_insert-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 22:21:17,918 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 22:21:17,920 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 22:21:17,943 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 22:21:17,943 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 22:21:17,944 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 22:21:17,945 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 22:21:17,947 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 22:21:17,949 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 22:21:17,949 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 22:21:17,950 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 22:21:17,951 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 22:21:17,952 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 22:21:17,952 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 22:21:17,953 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 22:21:17,954 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 22:21:17,955 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 22:21:17,956 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 22:21:17,958 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 22:21:17,959 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 22:21:17,961 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 22:21:17,962 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 22:21:17,963 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 22:21:17,963 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 22:21:17,966 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 22:21:17,966 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 22:21:17,966 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 22:21:17,967 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 22:21:17,967 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 22:21:17,968 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 22:21:17,968 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 22:21:17,969 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 22:21:17,970 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 22:21:17,970 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 22:21:17,971 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 22:21:17,972 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 22:21:17,972 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 22:21:17,972 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 22:21:17,973 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 22:21:17,973 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 22:21:17,974 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 22:21:17,975 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 22:21:17,984 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 22:21:17,985 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 22:21:17,986 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 22:21:17,986 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 22:21:17,986 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 22:21:17,986 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 22:21:17,987 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 22:21:17,987 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 22:21:17,987 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 22:21:17,987 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 22:21:17,987 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 22:21:17,988 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 22:21:17,988 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 22:21:17,988 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 22:21:17,988 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 22:21:17,988 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 22:21:17,989 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 22:21:17,989 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 22:21:17,989 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 22:21:17,989 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 22:21:17,989 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 22:21:17,989 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 22:21:17,990 INFO L138 SettingsManager]: * Use separate solver for trace checks=false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-08-22 22:21:18,285 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 22:21:18,300 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 22:21:18,305 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 22:21:18,307 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 22:21:18,307 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 22:21:18,308 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/sll_nondet_insert-1.i [2020-08-22 22:21:18,384 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/249219e78/fa162d6ac8694ec4aa9b49c5dec1c112/FLAG0d09394e9 [2020-08-22 22:21:18,926 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 22:21:18,927 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-ext3-properties/sll_nondet_insert-1.i [2020-08-22 22:21:18,942 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/249219e78/fa162d6ac8694ec4aa9b49c5dec1c112/FLAG0d09394e9 [2020-08-22 22:21:19,207 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/249219e78/fa162d6ac8694ec4aa9b49c5dec1c112 [2020-08-22 22:21:19,218 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 22:21:19,220 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 22:21:19,221 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 22:21:19,222 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 22:21:19,228 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 22:21:19,229 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 10:21:19" (1/1) ... [2020-08-22 22:21:19,232 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@374bc386 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:21:19, skipping insertion in model container [2020-08-22 22:21:19,232 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 10:21:19" (1/1) ... [2020-08-22 22:21:19,240 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 22:21:19,299 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 22:21:19,783 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 22:21:19,792 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 22:21:19,842 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 22:21:19,903 INFO L208 MainTranslator]: Completed translation [2020-08-22 22:21:19,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:21:19 WrapperNode [2020-08-22 22:21:19,904 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 22:21:19,904 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 22:21:19,905 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 22:21:19,905 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 22:21:19,919 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:21:19" (1/1) ... [2020-08-22 22:21:19,919 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:21:19" (1/1) ... [2020-08-22 22:21:19,936 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:21:19" (1/1) ... [2020-08-22 22:21:19,936 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:21:19" (1/1) ... [2020-08-22 22:21:19,952 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:21:19" (1/1) ... [2020-08-22 22:21:19,958 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:21:19" (1/1) ... [2020-08-22 22:21:19,961 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:21:19" (1/1) ... [2020-08-22 22:21:19,968 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 22:21:19,969 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 22:21:19,969 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 22:21:19,969 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 22:21:19,970 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:21:19" (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 [2020-08-22 22:21:20,027 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 22:21:20,028 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 22:21:20,028 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-08-22 22:21:20,028 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-08-22 22:21:20,028 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-08-22 22:21:20,028 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2020-08-22 22:21:20,028 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_length [2020-08-22 22:21:20,029 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2020-08-22 22:21:20,029 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_insert [2020-08-22 22:21:20,029 INFO L138 BoogieDeclarations]: Found implementation of procedure _get_nondet_int [2020-08-22 22:21:20,029 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 22:21:20,030 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 22:21:20,030 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 22:21:20,030 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-08-22 22:21:20,031 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-08-22 22:21:20,031 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-08-22 22:21:20,031 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-08-22 22:21:20,032 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-08-22 22:21:20,032 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-08-22 22:21:20,033 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-08-22 22:21:20,034 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-08-22 22:21:20,034 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-08-22 22:21:20,036 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-08-22 22:21:20,036 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-08-22 22:21:20,036 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-08-22 22:21:20,036 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-08-22 22:21:20,037 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-08-22 22:21:20,037 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-08-22 22:21:20,037 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-08-22 22:21:20,038 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-08-22 22:21:20,038 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-08-22 22:21:20,038 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-08-22 22:21:20,038 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-08-22 22:21:20,038 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-08-22 22:21:20,039 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-08-22 22:21:20,039 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-08-22 22:21:20,039 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-08-22 22:21:20,039 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-08-22 22:21:20,039 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-08-22 22:21:20,039 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-08-22 22:21:20,039 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-08-22 22:21:20,040 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-08-22 22:21:20,040 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-08-22 22:21:20,040 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-08-22 22:21:20,040 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-08-22 22:21:20,040 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-08-22 22:21:20,041 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-08-22 22:21:20,041 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-08-22 22:21:20,041 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-08-22 22:21:20,041 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-08-22 22:21:20,041 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-08-22 22:21:20,041 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-08-22 22:21:20,041 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-08-22 22:21:20,042 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-08-22 22:21:20,042 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-08-22 22:21:20,042 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-08-22 22:21:20,042 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-08-22 22:21:20,042 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-08-22 22:21:20,042 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-08-22 22:21:20,042 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-08-22 22:21:20,043 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-08-22 22:21:20,043 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-08-22 22:21:20,044 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-08-22 22:21:20,044 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-08-22 22:21:20,044 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-08-22 22:21:20,044 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-22 22:21:20,044 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-22 22:21:20,044 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-22 22:21:20,044 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-22 22:21:20,045 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-08-22 22:21:20,045 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-08-22 22:21:20,045 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-22 22:21:20,045 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-08-22 22:21:20,045 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-08-22 22:21:20,046 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 22:21:20,046 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-08-22 22:21:20,047 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-08-22 22:21:20,047 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-08-22 22:21:20,047 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-22 22:21:20,047 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-08-22 22:21:20,048 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-08-22 22:21:20,048 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-08-22 22:21:20,048 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-08-22 22:21:20,048 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-08-22 22:21:20,048 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-08-22 22:21:20,049 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-08-22 22:21:20,049 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-08-22 22:21:20,050 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-08-22 22:21:20,050 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-08-22 22:21:20,050 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-08-22 22:21:20,050 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-08-22 22:21:20,051 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-08-22 22:21:20,051 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-08-22 22:21:20,051 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-08-22 22:21:20,051 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-08-22 22:21:20,052 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-08-22 22:21:20,052 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-08-22 22:21:20,052 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-08-22 22:21:20,052 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-08-22 22:21:20,053 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-08-22 22:21:20,053 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-08-22 22:21:20,053 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-08-22 22:21:20,053 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-08-22 22:21:20,053 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-08-22 22:21:20,053 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-08-22 22:21:20,053 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-08-22 22:21:20,054 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-08-22 22:21:20,054 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-08-22 22:21:20,054 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-08-22 22:21:20,054 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-08-22 22:21:20,054 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-08-22 22:21:20,054 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-08-22 22:21:20,054 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-08-22 22:21:20,054 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-08-22 22:21:20,054 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-08-22 22:21:20,055 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-08-22 22:21:20,055 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-08-22 22:21:20,055 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-08-22 22:21:20,055 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-08-22 22:21:20,055 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2020-08-22 22:21:20,055 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-22 22:21:20,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-22 22:21:20,055 INFO L130 BoogieDeclarations]: Found specification of procedure sll_length [2020-08-22 22:21:20,055 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-22 22:21:20,056 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2020-08-22 22:21:20,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 22:21:20,056 INFO L130 BoogieDeclarations]: Found specification of procedure sll_insert [2020-08-22 22:21:20,056 INFO L130 BoogieDeclarations]: Found specification of procedure _get_nondet_int [2020-08-22 22:21:20,056 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 22:21:20,056 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 22:21:20,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-08-22 22:21:20,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 22:21:20,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 22:21:20,436 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-08-22 22:21:20,712 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 22:21:20,713 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-08-22 22:21:20,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 10:21:20 BoogieIcfgContainer [2020-08-22 22:21:20,718 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 22:21:20,719 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 22:21:20,720 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 22:21:20,723 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 22:21:20,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 10:21:19" (1/3) ... [2020-08-22 22:21:20,724 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61ab93f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 10:21:20, skipping insertion in model container [2020-08-22 22:21:20,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:21:19" (2/3) ... [2020-08-22 22:21:20,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61ab93f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 10:21:20, skipping insertion in model container [2020-08-22 22:21:20,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 10:21:20" (3/3) ... [2020-08-22 22:21:20,727 INFO L109 eAbstractionObserver]: Analyzing ICFG sll_nondet_insert-1.i [2020-08-22 22:21:20,738 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 22:21:20,746 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 22:21:20,761 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 22:21:20,784 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 22:21:20,784 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 22:21:20,785 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 22:21:20,785 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 22:21:20,785 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 22:21:20,786 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 22:21:20,786 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 22:21:20,786 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 22:21:20,807 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states. [2020-08-22 22:21:20,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-22 22:21:20,820 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:21:20,822 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:21:20,822 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:21:20,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:21:20,830 INFO L82 PathProgramCache]: Analyzing trace with hash 422432984, now seen corresponding path program 1 times [2020-08-22 22:21:20,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:21:20,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1568372418] [2020-08-22 22:21:20,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:21:20,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:21,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:21:21,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:21,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 22:21:21,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:21,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-22 22:21:21,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:21,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:21:21,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:21,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-22 22:21:21,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:21,154 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-22 22:21:21,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1568372418] [2020-08-22 22:21:21,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:21:21,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 22:21:21,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205957902] [2020-08-22 22:21:21,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 22:21:21,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:21:21,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 22:21:21,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 22:21:21,181 INFO L87 Difference]: Start difference. First operand 142 states. Second operand 4 states. [2020-08-22 22:21:21,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:21:21,556 INFO L93 Difference]: Finished difference Result 289 states and 337 transitions. [2020-08-22 22:21:21,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 22:21:21,558 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2020-08-22 22:21:21,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:21:21,571 INFO L225 Difference]: With dead ends: 289 [2020-08-22 22:21:21,571 INFO L226 Difference]: Without dead ends: 123 [2020-08-22 22:21:21,576 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 22:21:21,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-08-22 22:21:21,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 114. [2020-08-22 22:21:21,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-08-22 22:21:21,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 123 transitions. [2020-08-22 22:21:21,640 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 123 transitions. Word has length 54 [2020-08-22 22:21:21,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:21:21,640 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 123 transitions. [2020-08-22 22:21:21,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 22:21:21,640 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 123 transitions. [2020-08-22 22:21:21,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-22 22:21:21,647 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:21:21,647 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:21:21,647 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 22:21:21,648 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:21:21,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:21:21,648 INFO L82 PathProgramCache]: Analyzing trace with hash 333013349, now seen corresponding path program 1 times [2020-08-22 22:21:21,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:21:21,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [742473488] [2020-08-22 22:21:21,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:21:21,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:21,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:21:21,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:21,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 22:21:21,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:21,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 22:21:21,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:21,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-22 22:21:21,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:21,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-22 22:21:21,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:21,988 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 22:21:21,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [742473488] [2020-08-22 22:21:21,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:21:21,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 22:21:21,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985052630] [2020-08-22 22:21:21,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 22:21:21,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:21:21,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 22:21:21,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-22 22:21:21,992 INFO L87 Difference]: Start difference. First operand 114 states and 123 transitions. Second operand 9 states. [2020-08-22 22:21:22,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:21:22,823 INFO L93 Difference]: Finished difference Result 275 states and 301 transitions. [2020-08-22 22:21:22,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 22:21:22,824 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 69 [2020-08-22 22:21:22,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:21:22,827 INFO L225 Difference]: With dead ends: 275 [2020-08-22 22:21:22,827 INFO L226 Difference]: Without dead ends: 169 [2020-08-22 22:21:22,829 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2020-08-22 22:21:22,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-08-22 22:21:22,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 134. [2020-08-22 22:21:22,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-08-22 22:21:22,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 145 transitions. [2020-08-22 22:21:22,856 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 145 transitions. Word has length 69 [2020-08-22 22:21:22,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:21:22,856 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 145 transitions. [2020-08-22 22:21:22,857 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 22:21:22,857 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 145 transitions. [2020-08-22 22:21:22,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-08-22 22:21:22,859 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:21:22,860 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:21:22,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 22:21:22,860 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:21:22,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:21:22,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1735568478, now seen corresponding path program 1 times [2020-08-22 22:21:22,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:21:22,861 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [844505049] [2020-08-22 22:21:22,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:21:22,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:22,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:21:22,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:22,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 22:21:22,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:23,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-22 22:21:23,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:23,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 22:21:23,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:23,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-22 22:21:23,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:23,073 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 22:21:23,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [844505049] [2020-08-22 22:21:23,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:21:23,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 22:21:23,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006823421] [2020-08-22 22:21:23,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 22:21:23,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:21:23,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 22:21:23,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-08-22 22:21:23,076 INFO L87 Difference]: Start difference. First operand 134 states and 145 transitions. Second operand 12 states. [2020-08-22 22:21:24,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:21:24,028 INFO L93 Difference]: Finished difference Result 313 states and 348 transitions. [2020-08-22 22:21:24,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 22:21:24,028 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 71 [2020-08-22 22:21:24,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:21:24,031 INFO L225 Difference]: With dead ends: 313 [2020-08-22 22:21:24,031 INFO L226 Difference]: Without dead ends: 206 [2020-08-22 22:21:24,033 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2020-08-22 22:21:24,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-08-22 22:21:24,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 154. [2020-08-22 22:21:24,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-08-22 22:21:24,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 167 transitions. [2020-08-22 22:21:24,089 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 167 transitions. Word has length 71 [2020-08-22 22:21:24,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:21:24,090 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 167 transitions. [2020-08-22 22:21:24,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 22:21:24,090 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 167 transitions. [2020-08-22 22:21:24,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-22 22:21:24,092 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:21:24,093 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:21:24,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 22:21:24,093 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:21:24,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:21:24,094 INFO L82 PathProgramCache]: Analyzing trace with hash -472966004, now seen corresponding path program 1 times [2020-08-22 22:21:24,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:21:24,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1495052559] [2020-08-22 22:21:24,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:21:24,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:24,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:21:24,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:24,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 22:21:24,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:24,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-22 22:21:24,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:24,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-22 22:21:24,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:24,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-22 22:21:24,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:24,425 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 22:21:24,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1495052559] [2020-08-22 22:21:24,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:21:24,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 22:21:24,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035025304] [2020-08-22 22:21:24,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 22:21:24,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:21:24,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 22:21:24,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-08-22 22:21:24,427 INFO L87 Difference]: Start difference. First operand 154 states and 167 transitions. Second operand 11 states. [2020-08-22 22:21:25,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:21:25,955 INFO L93 Difference]: Finished difference Result 342 states and 375 transitions. [2020-08-22 22:21:25,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 22:21:25,955 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 79 [2020-08-22 22:21:25,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:21:25,957 INFO L225 Difference]: With dead ends: 342 [2020-08-22 22:21:25,957 INFO L226 Difference]: Without dead ends: 204 [2020-08-22 22:21:25,959 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=224, Invalid=478, Unknown=0, NotChecked=0, Total=702 [2020-08-22 22:21:25,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-08-22 22:21:25,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 161. [2020-08-22 22:21:25,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-08-22 22:21:25,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 174 transitions. [2020-08-22 22:21:25,988 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 174 transitions. Word has length 79 [2020-08-22 22:21:25,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:21:25,988 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 174 transitions. [2020-08-22 22:21:25,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 22:21:25,988 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 174 transitions. [2020-08-22 22:21:25,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-08-22 22:21:25,990 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:21:25,990 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:21:25,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 22:21:25,991 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:21:25,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:21:25,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1820928426, now seen corresponding path program 1 times [2020-08-22 22:21:25,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:21:25,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1016639814] [2020-08-22 22:21:25,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:21:26,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:26,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:21:26,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:26,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 22:21:26,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:26,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-22 22:21:26,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:26,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 22:21:26,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:26,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-08-22 22:21:26,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:26,227 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 22:21:26,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1016639814] [2020-08-22 22:21:26,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:21:26,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 22:21:26,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349585796] [2020-08-22 22:21:26,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 22:21:26,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:21:26,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 22:21:26,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-08-22 22:21:26,229 INFO L87 Difference]: Start difference. First operand 161 states and 174 transitions. Second operand 14 states. [2020-08-22 22:21:27,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:21:27,296 INFO L93 Difference]: Finished difference Result 307 states and 339 transitions. [2020-08-22 22:21:27,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-22 22:21:27,296 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 80 [2020-08-22 22:21:27,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:21:27,299 INFO L225 Difference]: With dead ends: 307 [2020-08-22 22:21:27,299 INFO L226 Difference]: Without dead ends: 221 [2020-08-22 22:21:27,300 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=160, Invalid=770, Unknown=0, NotChecked=0, Total=930 [2020-08-22 22:21:27,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-08-22 22:21:27,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 170. [2020-08-22 22:21:27,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-08-22 22:21:27,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 184 transitions. [2020-08-22 22:21:27,330 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 184 transitions. Word has length 80 [2020-08-22 22:21:27,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:21:27,330 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 184 transitions. [2020-08-22 22:21:27,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 22:21:27,330 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 184 transitions. [2020-08-22 22:21:27,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-08-22 22:21:27,332 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:21:27,333 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:21:27,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 22:21:27,333 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:21:27,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:21:27,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1107353865, now seen corresponding path program 2 times [2020-08-22 22:21:27,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:21:27,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1511339033] [2020-08-22 22:21:27,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:21:27,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:27,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:21:27,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:27,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 22:21:27,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:27,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-22 22:21:27,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:27,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-22 22:21:27,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:27,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-22 22:21:27,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:27,580 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 22:21:27,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1511339033] [2020-08-22 22:21:27,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:21:27,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 22:21:27,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489974578] [2020-08-22 22:21:27,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 22:21:27,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:21:27,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 22:21:27,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-08-22 22:21:27,585 INFO L87 Difference]: Start difference. First operand 170 states and 184 transitions. Second operand 14 states. [2020-08-22 22:21:28,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:21:28,913 INFO L93 Difference]: Finished difference Result 306 states and 337 transitions. [2020-08-22 22:21:28,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 22:21:28,914 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 81 [2020-08-22 22:21:28,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:21:28,916 INFO L225 Difference]: With dead ends: 306 [2020-08-22 22:21:28,917 INFO L226 Difference]: Without dead ends: 216 [2020-08-22 22:21:28,918 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=172, Invalid=820, Unknown=0, NotChecked=0, Total=992 [2020-08-22 22:21:28,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-08-22 22:21:28,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 170. [2020-08-22 22:21:28,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-08-22 22:21:28,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 183 transitions. [2020-08-22 22:21:28,940 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 183 transitions. Word has length 81 [2020-08-22 22:21:28,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:21:28,940 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 183 transitions. [2020-08-22 22:21:28,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 22:21:28,940 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 183 transitions. [2020-08-22 22:21:28,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-22 22:21:28,941 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:21:28,942 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:21:28,942 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 22:21:28,942 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:21:28,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:21:28,942 INFO L82 PathProgramCache]: Analyzing trace with hash -574415326, now seen corresponding path program 2 times [2020-08-22 22:21:28,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:21:28,943 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [836380131] [2020-08-22 22:21:28,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:21:28,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:29,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:21:29,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:29,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 22:21:29,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:29,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-22 22:21:29,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:29,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-22 22:21:29,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:29,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-22 22:21:29,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:29,138 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-22 22:21:29,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [836380131] [2020-08-22 22:21:29,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:21:29,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-08-22 22:21:29,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361048937] [2020-08-22 22:21:29,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 22:21:29,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:21:29,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 22:21:29,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-08-22 22:21:29,141 INFO L87 Difference]: Start difference. First operand 170 states and 183 transitions. Second operand 13 states. [2020-08-22 22:21:29,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:21:29,798 INFO L93 Difference]: Finished difference Result 207 states and 225 transitions. [2020-08-22 22:21:29,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 22:21:29,798 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 89 [2020-08-22 22:21:29,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:21:29,800 INFO L225 Difference]: With dead ends: 207 [2020-08-22 22:21:29,800 INFO L226 Difference]: Without dead ends: 201 [2020-08-22 22:21:29,801 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2020-08-22 22:21:29,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-08-22 22:21:29,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 183. [2020-08-22 22:21:29,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-08-22 22:21:29,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 200 transitions. [2020-08-22 22:21:29,825 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 200 transitions. Word has length 89 [2020-08-22 22:21:29,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:21:29,826 INFO L479 AbstractCegarLoop]: Abstraction has 183 states and 200 transitions. [2020-08-22 22:21:29,826 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 22:21:29,826 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 200 transitions. [2020-08-22 22:21:29,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-08-22 22:21:29,827 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:21:29,827 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:21:29,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 22:21:29,828 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:21:29,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:21:29,828 INFO L82 PathProgramCache]: Analyzing trace with hash 263120297, now seen corresponding path program 1 times [2020-08-22 22:21:29,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:21:29,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [568916808] [2020-08-22 22:21:29,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:21:29,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:29,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:21:29,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:29,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 22:21:29,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:29,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-22 22:21:29,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:29,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-22 22:21:29,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:30,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-22 22:21:30,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:30,129 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 22:21:30,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [568916808] [2020-08-22 22:21:30,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:21:30,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-22 22:21:30,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095356561] [2020-08-22 22:21:30,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 22:21:30,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:21:30,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 22:21:30,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-08-22 22:21:30,132 INFO L87 Difference]: Start difference. First operand 183 states and 200 transitions. Second operand 18 states. [2020-08-22 22:21:31,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:21:31,382 INFO L93 Difference]: Finished difference Result 239 states and 263 transitions. [2020-08-22 22:21:31,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-22 22:21:31,382 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 96 [2020-08-22 22:21:31,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:21:31,385 INFO L225 Difference]: With dead ends: 239 [2020-08-22 22:21:31,385 INFO L226 Difference]: Without dead ends: 233 [2020-08-22 22:21:31,387 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=169, Invalid=1021, Unknown=0, NotChecked=0, Total=1190 [2020-08-22 22:21:31,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-08-22 22:21:31,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 209. [2020-08-22 22:21:31,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-08-22 22:21:31,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 232 transitions. [2020-08-22 22:21:31,416 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 232 transitions. Word has length 96 [2020-08-22 22:21:31,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:21:31,417 INFO L479 AbstractCegarLoop]: Abstraction has 209 states and 232 transitions. [2020-08-22 22:21:31,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 22:21:31,417 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 232 transitions. [2020-08-22 22:21:31,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-22 22:21:31,418 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:21:31,419 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:21:31,419 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 22:21:31,419 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:21:31,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:21:31,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1940597340, now seen corresponding path program 1 times [2020-08-22 22:21:31,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:21:31,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1597717692] [2020-08-22 22:21:31,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:21:31,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:31,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:21:31,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:31,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 22:21:31,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:31,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-22 22:21:31,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:31,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-08-22 22:21:31,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:31,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-08-22 22:21:31,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:31,681 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 22:21:31,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1597717692] [2020-08-22 22:21:31,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:21:31,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-22 22:21:31,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786580522] [2020-08-22 22:21:31,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 22:21:31,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:21:31,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 22:21:31,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-08-22 22:21:31,684 INFO L87 Difference]: Start difference. First operand 209 states and 232 transitions. Second operand 16 states. [2020-08-22 22:21:33,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:21:33,132 INFO L93 Difference]: Finished difference Result 358 states and 404 transitions. [2020-08-22 22:21:33,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-22 22:21:33,133 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 97 [2020-08-22 22:21:33,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:21:33,135 INFO L225 Difference]: With dead ends: 358 [2020-08-22 22:21:33,136 INFO L226 Difference]: Without dead ends: 245 [2020-08-22 22:21:33,138 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=187, Invalid=1003, Unknown=0, NotChecked=0, Total=1190 [2020-08-22 22:21:33,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-08-22 22:21:33,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 176. [2020-08-22 22:21:33,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-08-22 22:21:33,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 192 transitions. [2020-08-22 22:21:33,168 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 192 transitions. Word has length 97 [2020-08-22 22:21:33,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:21:33,169 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 192 transitions. [2020-08-22 22:21:33,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 22:21:33,169 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 192 transitions. [2020-08-22 22:21:33,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-22 22:21:33,170 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:21:33,171 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:21:33,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 22:21:33,171 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:21:33,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:21:33,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1056708542, now seen corresponding path program 2 times [2020-08-22 22:21:33,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:21:33,172 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1021233990] [2020-08-22 22:21:33,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:21:33,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:33,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:21:33,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:33,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 22:21:33,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:33,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-22 22:21:33,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:33,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-22 22:21:33,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:33,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-22 22:21:33,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:33,402 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-08-22 22:21:33,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1021233990] [2020-08-22 22:21:33,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:21:33,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 22:21:33,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941370467] [2020-08-22 22:21:33,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 22:21:33,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:21:33,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 22:21:33,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-08-22 22:21:33,405 INFO L87 Difference]: Start difference. First operand 176 states and 192 transitions. Second operand 13 states. [2020-08-22 22:21:34,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:21:34,502 INFO L93 Difference]: Finished difference Result 369 states and 420 transitions. [2020-08-22 22:21:34,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 22:21:34,503 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 103 [2020-08-22 22:21:34,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:21:34,504 INFO L225 Difference]: With dead ends: 369 [2020-08-22 22:21:34,505 INFO L226 Difference]: Without dead ends: 266 [2020-08-22 22:21:34,506 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=211, Invalid=659, Unknown=0, NotChecked=0, Total=870 [2020-08-22 22:21:34,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-08-22 22:21:34,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 206. [2020-08-22 22:21:34,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-08-22 22:21:34,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 228 transitions. [2020-08-22 22:21:34,534 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 228 transitions. Word has length 103 [2020-08-22 22:21:34,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:21:34,535 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 228 transitions. [2020-08-22 22:21:34,535 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 22:21:34,535 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 228 transitions. [2020-08-22 22:21:34,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-08-22 22:21:34,536 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:21:34,537 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:21:34,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 22:21:34,537 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:21:34,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:21:34,537 INFO L82 PathProgramCache]: Analyzing trace with hash 2144765375, now seen corresponding path program 1 times [2020-08-22 22:21:34,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:21:34,538 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2028128030] [2020-08-22 22:21:34,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:21:34,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:34,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:21:34,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:34,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 22:21:34,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:34,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-22 22:21:34,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:34,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-22 22:21:34,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:34,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-22 22:21:34,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:34,952 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 22:21:34,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2028128030] [2020-08-22 22:21:34,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:21:34,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-22 22:21:34,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491948669] [2020-08-22 22:21:34,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-22 22:21:34,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:21:34,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-22 22:21:34,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2020-08-22 22:21:34,954 INFO L87 Difference]: Start difference. First operand 206 states and 228 transitions. Second operand 20 states. [2020-08-22 22:21:36,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:21:36,771 INFO L93 Difference]: Finished difference Result 325 states and 381 transitions. [2020-08-22 22:21:36,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-22 22:21:36,772 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 105 [2020-08-22 22:21:36,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:21:36,776 INFO L225 Difference]: With dead ends: 325 [2020-08-22 22:21:36,776 INFO L226 Difference]: Without dead ends: 319 [2020-08-22 22:21:36,778 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=209, Invalid=1513, Unknown=0, NotChecked=0, Total=1722 [2020-08-22 22:21:36,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2020-08-22 22:21:36,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 256. [2020-08-22 22:21:36,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-08-22 22:21:36,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 294 transitions. [2020-08-22 22:21:36,828 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 294 transitions. Word has length 105 [2020-08-22 22:21:36,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:21:36,829 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 294 transitions. [2020-08-22 22:21:36,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-22 22:21:36,829 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 294 transitions. [2020-08-22 22:21:36,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-08-22 22:21:36,832 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:21:36,832 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:21:36,832 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 22:21:36,832 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:21:36,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:21:36,833 INFO L82 PathProgramCache]: Analyzing trace with hash -798874772, now seen corresponding path program 2 times [2020-08-22 22:21:36,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:21:36,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [17692600] [2020-08-22 22:21:36,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:21:36,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:36,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:21:36,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:36,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 22:21:36,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:36,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-22 22:21:36,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:37,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-22 22:21:37,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:37,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-22 22:21:37,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:37,451 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-08-22 22:21:37,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [17692600] [2020-08-22 22:21:37,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:21:37,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-22 22:21:37,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215834899] [2020-08-22 22:21:37,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-22 22:21:37,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:21:37,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-22 22:21:37,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=461, Unknown=0, NotChecked=0, Total=506 [2020-08-22 22:21:37,453 INFO L87 Difference]: Start difference. First operand 256 states and 294 transitions. Second operand 23 states. [2020-08-22 22:21:39,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:21:39,585 INFO L93 Difference]: Finished difference Result 340 states and 399 transitions. [2020-08-22 22:21:39,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-22 22:21:39,586 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 112 [2020-08-22 22:21:39,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:21:39,589 INFO L225 Difference]: With dead ends: 340 [2020-08-22 22:21:39,589 INFO L226 Difference]: Without dead ends: 330 [2020-08-22 22:21:39,591 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=172, Invalid=1720, Unknown=0, NotChecked=0, Total=1892 [2020-08-22 22:21:39,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-08-22 22:21:39,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 297. [2020-08-22 22:21:39,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2020-08-22 22:21:39,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 346 transitions. [2020-08-22 22:21:39,633 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 346 transitions. Word has length 112 [2020-08-22 22:21:39,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:21:39,633 INFO L479 AbstractCegarLoop]: Abstraction has 297 states and 346 transitions. [2020-08-22 22:21:39,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-22 22:21:39,634 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 346 transitions. [2020-08-22 22:21:39,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-08-22 22:21:39,636 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:21:39,636 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:21:39,636 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 22:21:39,636 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:21:39,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:21:39,637 INFO L82 PathProgramCache]: Analyzing trace with hash -861453783, now seen corresponding path program 2 times [2020-08-22 22:21:39,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:21:39,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1816244524] [2020-08-22 22:21:39,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:21:39,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:39,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:21:39,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:39,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 22:21:39,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:39,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-22 22:21:39,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:39,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-22 22:21:39,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:39,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-22 22:21:39,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:39,845 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-08-22 22:21:39,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1816244524] [2020-08-22 22:21:39,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:21:39,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-22 22:21:39,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981165700] [2020-08-22 22:21:39,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 22:21:39,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:21:39,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 22:21:39,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-08-22 22:21:39,848 INFO L87 Difference]: Start difference. First operand 297 states and 346 transitions. Second operand 15 states. [2020-08-22 22:21:41,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:21:41,244 INFO L93 Difference]: Finished difference Result 542 states and 648 transitions. [2020-08-22 22:21:41,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-22 22:21:41,245 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 113 [2020-08-22 22:21:41,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:21:41,248 INFO L225 Difference]: With dead ends: 542 [2020-08-22 22:21:41,249 INFO L226 Difference]: Without dead ends: 407 [2020-08-22 22:21:41,250 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=262, Invalid=998, Unknown=0, NotChecked=0, Total=1260 [2020-08-22 22:21:41,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2020-08-22 22:21:41,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 321. [2020-08-22 22:21:41,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321 states. [2020-08-22 22:21:41,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 380 transitions. [2020-08-22 22:21:41,306 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 380 transitions. Word has length 113 [2020-08-22 22:21:41,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:21:41,307 INFO L479 AbstractCegarLoop]: Abstraction has 321 states and 380 transitions. [2020-08-22 22:21:41,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 22:21:41,307 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 380 transitions. [2020-08-22 22:21:41,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-08-22 22:21:41,309 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:21:41,310 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:21:41,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 22:21:41,310 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:21:41,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:21:41,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1389369769, now seen corresponding path program 3 times [2020-08-22 22:21:41,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:21:41,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1727551252] [2020-08-22 22:21:41,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:21:41,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:41,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:21:41,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:41,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 22:21:41,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:41,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-22 22:21:41,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:41,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-22 22:21:41,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:41,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-22 22:21:41,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:21:41,608 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-08-22 22:21:41,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1727551252] [2020-08-22 22:21:41,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:21:41,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-22 22:21:41,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583632625] [2020-08-22 22:21:41,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 22:21:41,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:21:41,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 22:21:41,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2020-08-22 22:21:41,613 INFO L87 Difference]: Start difference. First operand 321 states and 380 transitions. Second operand 18 states. [2020-08-22 22:21:43,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:21:43,650 INFO L93 Difference]: Finished difference Result 536 states and 631 transitions. [2020-08-22 22:21:43,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-22 22:21:43,651 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 113 [2020-08-22 22:21:43,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:21:43,654 INFO L225 Difference]: With dead ends: 536 [2020-08-22 22:21:43,654 INFO L226 Difference]: Without dead ends: 377 [2020-08-22 22:21:43,656 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=219, Invalid=1263, Unknown=0, NotChecked=0, Total=1482 [2020-08-22 22:21:43,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2020-08-22 22:21:43,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 318. [2020-08-22 22:21:43,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-08-22 22:21:43,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 371 transitions. [2020-08-22 22:21:43,731 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 371 transitions. Word has length 113 [2020-08-22 22:21:43,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:21:43,732 INFO L479 AbstractCegarLoop]: Abstraction has 318 states and 371 transitions. [2020-08-22 22:21:43,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 22:21:43,732 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 371 transitions. [2020-08-22 22:21:43,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-08-22 22:21:43,735 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:21:43,735 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:21:43,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 22:21:43,735 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:21:43,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:21:43,736 INFO L82 PathProgramCache]: Analyzing trace with hash 2144590086, now seen corresponding path program 1 times [2020-08-22 22:21:43,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:21:43,736 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [976626357] [2020-08-22 22:21:43,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:21:43,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 22:21:43,761 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 22:21:43,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 22:21:43,802 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 22:21:43,848 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 22:21:43,848 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 22:21:43,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 22:21:43,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 10:21:43 BoogieIcfgContainer [2020-08-22 22:21:43,919 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 22:21:43,922 INFO L168 Benchmark]: Toolchain (without parser) took 24700.85 ms. Allocated memory was 138.4 MB in the beginning and 509.1 MB in the end (delta: 370.7 MB). Free memory was 100.7 MB in the beginning and 280.6 MB in the end (delta: -179.9 MB). Peak memory consumption was 190.8 MB. Max. memory is 7.1 GB. [2020-08-22 22:21:43,922 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 138.4 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 22:21:43,923 INFO L168 Benchmark]: CACSL2BoogieTranslator took 682.71 ms. Allocated memory was 138.4 MB in the beginning and 201.9 MB in the end (delta: 63.4 MB). Free memory was 100.5 MB in the beginning and 167.1 MB in the end (delta: -66.6 MB). Peak memory consumption was 26.4 MB. Max. memory is 7.1 GB. [2020-08-22 22:21:43,924 INFO L168 Benchmark]: Boogie Preprocessor took 63.98 ms. Allocated memory is still 201.9 MB. Free memory was 167.1 MB in the beginning and 164.4 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. [2020-08-22 22:21:43,925 INFO L168 Benchmark]: RCFGBuilder took 749.28 ms. Allocated memory is still 201.9 MB. Free memory was 164.4 MB in the beginning and 107.1 MB in the end (delta: 57.3 MB). Peak memory consumption was 57.3 MB. Max. memory is 7.1 GB. [2020-08-22 22:21:43,926 INFO L168 Benchmark]: TraceAbstraction took 23199.72 ms. Allocated memory was 201.9 MB in the beginning and 509.1 MB in the end (delta: 307.2 MB). Free memory was 106.4 MB in the beginning and 280.6 MB in the end (delta: -174.2 MB). Peak memory consumption was 133.0 MB. Max. memory is 7.1 GB. [2020-08-22 22:21:43,929 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 138.4 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 682.71 ms. Allocated memory was 138.4 MB in the beginning and 201.9 MB in the end (delta: 63.4 MB). Free memory was 100.5 MB in the beginning and 167.1 MB in the end (delta: -66.6 MB). Peak memory consumption was 26.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 63.98 ms. Allocated memory is still 201.9 MB. Free memory was 167.1 MB in the beginning and 164.4 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 749.28 ms. Allocated memory is still 201.9 MB. Free memory was 164.4 MB in the beginning and 107.1 MB in the end (delta: 57.3 MB). Peak memory consumption was 57.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 23199.72 ms. Allocated memory was 201.9 MB in the beginning and 509.1 MB in the end (delta: 307.2 MB). Free memory was 106.4 MB in the beginning and 280.6 MB in the end (delta: -174.2 MB). Peak memory consumption was 133.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 630]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L616] CALL, EXPR _get_nondet_int(2, 5) VAL [\old(from)=2, \old(until)=5] [L609] int len = from; VAL [\old(from)=2, \old(until)=5, from=2, len=2, until=5] [L610] len < until && __VERIFIER_nondet_int() VAL [\old(from)=2, \old(until)=5, from=2, len=2, len < until && __VERIFIER_nondet_int()=1, until=5] [L610] len < until && __VERIFIER_nondet_int() VAL [\old(from)=2, \old(until)=5, __VERIFIER_nondet_int()=0, from=2, len=2, len < until && __VERIFIER_nondet_int()=0, until=5] [L610] COND FALSE !(len < until && __VERIFIER_nondet_int()) VAL [\old(from)=2, \old(until)=5, __VERIFIER_nondet_int()=0, from=2, len=2, len < until && __VERIFIER_nondet_int()=0, until=5] [L613] return len; VAL [\old(from)=2, \old(until)=5, \result=2, from=2, len=2, until=5] [L616] RET, EXPR _get_nondet_int(2, 5) VAL [_get_nondet_int(2, 5)=2] [L616] const int len = _get_nondet_int(2, 5); VAL [_get_nondet_int(2, 5)=2, len=2] [L617] SLL s = sll_create(len); VAL [len=2, s={2:0}] [L617] CALL, EXPR sll_create(len) VAL [\old(len)=2] [L564] SLL head = ((void *)0); VAL [\old(len)=2, head={0:0}, len=2] [L565] EXPR len-- VAL [\old(len)=2, head={0:0}, len=1, len--=2] [L565] COND TRUE len-- > 0 VAL [\old(len)=2, head={0:0}, len=1, len--=2] [L566] SLL new_head = (SLL) malloc(sizeof(struct node)); VAL [\old(len)=2, head={0:0}, len=1, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L567] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=2, head={0:0}, len=1, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L570] new_head->next = head VAL [\old(len)=2, head={0:0}, len=1, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L571] head = new_head VAL [\old(len)=2, head={-1:0}, len=1, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L565] EXPR len-- VAL [\old(len)=2, head={-1:0}, len=0, len--=1, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L565] COND TRUE len-- > 0 VAL [\old(len)=2, head={-1:0}, len=0, len--=1, malloc(sizeof(struct node))={-1:0}, new_head={-1:0}] [L566] SLL new_head = (SLL) malloc(sizeof(struct node)); VAL [\old(len)=2, head={-1:0}, len=0, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L567] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=2, head={-1:0}, len=0, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L570] new_head->next = head VAL [\old(len)=2, head={-1:0}, len=0, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L571] head = new_head VAL [\old(len)=2, head={-2:0}, len=0, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L565] EXPR len-- VAL [\old(len)=2, head={-2:0}, len=-1, len--=0, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L565] COND FALSE !(len-- > 0) VAL [\old(len)=2, head={-2:0}, len=-1, len--=0, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L573] return head; VAL [\old(len)=2, \result={-2:0}, head={-2:0}, len=-1, malloc(sizeof(struct node))={-2:0}, new_head={-2:0}] [L617] RET, EXPR sll_create(len) VAL [len=2, s={2:0}, sll_create(len)={-2:0}] [L617] SLL s = sll_create(len); VAL [len=2, s={2:0}, sll_create(len)={-2:0}] [L618] CALL, EXPR _get_nondet_int(0, len - 1) VAL [\old(from)=0, \old(until)=1] [L609] int len = from; VAL [\old(from)=0, \old(until)=1, from=0, len=0, until=1] [L610] len < until && __VERIFIER_nondet_int() VAL [\old(from)=0, \old(until)=1, from=0, len=0, len < until && __VERIFIER_nondet_int()=1, until=1] [L610] len < until && __VERIFIER_nondet_int() VAL [\old(from)=0, \old(until)=1, __VERIFIER_nondet_int()=1, from=0, len=0, len < until && __VERIFIER_nondet_int()=1, until=1] [L610] COND TRUE len < until && __VERIFIER_nondet_int() VAL [\old(from)=0, \old(until)=1, __VERIFIER_nondet_int()=1, from=0, len=0, len < until && __VERIFIER_nondet_int()=1, until=1] [L611] len++ VAL [\old(from)=0, \old(until)=1, from=0, len=1, until=1] [L610] len < until && __VERIFIER_nondet_int() VAL [\old(from)=0, \old(until)=1, from=0, len=1, len < until && __VERIFIER_nondet_int()=0, until=1] [L610] COND FALSE !(len < until && __VERIFIER_nondet_int()) VAL [\old(from)=0, \old(until)=1, from=0, len=1, len < until && __VERIFIER_nondet_int()=0, until=1] [L613] return len; VAL [\old(from)=0, \old(until)=1, \result=1, from=0, len=1, until=1] [L618] RET, EXPR _get_nondet_int(0, len - 1) VAL [_get_nondet_int(0, len - 1)=1, len=2, s={2:0}] [L618] const int k = _get_nondet_int(0, len - 1); VAL [_get_nondet_int(0, len - 1)=1, k=1, len=2, s={2:0}] [L619] int i = 0; VAL [i=0, k=1, len=2, s={2:0}] [L620] i < k && __VERIFIER_nondet_int() VAL [i=0, i < k && __VERIFIER_nondet_int()=1, k=1, len=2, s={2:0}] [L620] i < k && __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, i=0, i < k && __VERIFIER_nondet_int()=0, k=1, len=2, s={2:0}] [L620] COND FALSE !(i < k && __VERIFIER_nondet_int()) VAL [__VERIFIER_nondet_int()=0, i=0, i < k && __VERIFIER_nondet_int()=0, k=1, len=2, s={2:0}] [L625] EXPR \read(s) VAL [\read(s)={-2:0}, i=0, k=1, len=2, s={2:0}] [L625] CALL, EXPR sll_length(s) VAL [head={-2:0}] [L576] int len = 0; VAL [head={-2:0}, head={-2:0}, len=0] [L577] COND TRUE \read(head) VAL [head={-2:0}, head={-2:0}, len=0] [L578] len++ VAL [head={-2:0}, head={-2:0}, len=1] [L579] EXPR head->next VAL [head={-2:0}, head={-2:0}, head->next={-1:0}, len=1] [L579] head = head->next VAL [head={-2:0}, head={-1:0}, head->next={-1:0}, len=1] [L577] COND TRUE \read(head) VAL [head={-1:0}, head={-2:0}, len=1] [L578] len++ VAL [head={-2:0}, head={-1:0}, len=2] [L579] EXPR head->next VAL [head={-1:0}, head={-2:0}, head->next={0:0}, len=2] [L579] head = head->next VAL [head={0:0}, head={-2:0}, head->next={0:0}, len=2] [L577] COND FALSE !(\read(head)) VAL [head={0:0}, head={-2:0}, len=2] [L581] return len; VAL [\result=2, head={0:0}, head={-2:0}, len=2] [L625] RET, EXPR sll_length(s) VAL [\read(s)={-2:0}, i=0, k=1, len=2, s={2:0}, sll_length(s)=2] [L625] COND TRUE k + len != sll_length(s) VAL [\read(s)={-2:0}, i=0, k=1, len=2, s={2:0}, sll_length(s)=2] [L630] __VERIFIER_error() VAL [i=0, k=1, len=2, s={2:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 11 procedures, 153 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 23.0s, OverallIterations: 15, TraceHistogramMax: 3, AutomataDifference: 18.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1930 SDtfs, 4096 SDslu, 11479 SDs, 0 SdLazy, 12874 SolverSat, 560 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 8.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 589 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 394 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1761 ImplicationChecksByTransitivity, 9.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=321occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 14 MinimizatonAttempts, 648 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 3.5s InterpolantComputationTime, 1377 NumberOfCodeBlocks, 1377 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 1248 ConstructedInterpolants, 0 QuantifiedInterpolants, 573141 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 2 PerfectInterpolantSequences, 167/365 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...