/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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-simple/sll2c_remove_all_reverse.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 21:18:15,899 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 21:18:15,901 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 21:18:15,920 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 21:18:15,921 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 21:18:15,923 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 21:18:15,925 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 21:18:15,937 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 21:18:15,939 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 21:18:15,939 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 21:18:15,942 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 21:18:15,944 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 21:18:15,944 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 21:18:15,948 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 21:18:15,950 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 21:18:15,952 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 21:18:15,954 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 21:18:15,956 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 21:18:15,958 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 21:18:15,963 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 21:18:15,967 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 21:18:15,968 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 21:18:15,969 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 21:18:15,970 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 21:18:15,972 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-06 21:18:15,972 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-06 21:18:15,972 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-06 21:18:15,974 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-06 21:18:15,974 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-06 21:18:15,977 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-06 21:18:15,978 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 21:18:15,978 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 21:18:15,979 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 21:18:15,980 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 21:18:15,982 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 21:18:15,982 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 21:18:15,982 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 21:18:15,983 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 21:18:15,983 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 21:18:15,987 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 21:18:15,988 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 21:18:15,989 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 21:18:16,009 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 21:18:16,009 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 21:18:16,011 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 21:18:16,011 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 21:18:16,012 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 21:18:16,012 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 21:18:16,012 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 21:18:16,012 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 21:18:16,012 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 21:18:16,013 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 21:18:16,014 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 21:18:16,014 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 21:18:16,014 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 21:18:16,014 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 21:18:16,014 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 21:18:16,015 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 21:18:16,015 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 21:18:16,015 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 21:18:16,015 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 21:18:16,015 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 21:18:16,016 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 21:18:16,016 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 21:18:16,016 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 21:18:16,016 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 21:18:16,016 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 21:18:16,017 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 21:18:16,017 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 21:18:16,017 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 21:18:16,017 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 21:18:16,271 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 21:18:16,283 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 21:18:16,287 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 21:18:16,288 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 21:18:16,289 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 21:18:16,289 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-simple/sll2c_remove_all_reverse.i [2019-11-06 21:18:16,347 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32422a298/b55fe27994d34b469fbb0b4d058169c2/FLAG4277e0e0e [2019-11-06 21:18:16,915 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 21:18:16,918 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-simple/sll2c_remove_all_reverse.i [2019-11-06 21:18:16,929 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32422a298/b55fe27994d34b469fbb0b4d058169c2/FLAG4277e0e0e [2019-11-06 21:18:17,175 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32422a298/b55fe27994d34b469fbb0b4d058169c2 [2019-11-06 21:18:17,185 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 21:18:17,186 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 21:18:17,187 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 21:18:17,187 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 21:18:17,191 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 21:18:17,192 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:18:17" (1/1) ... [2019-11-06 21:18:17,194 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12a9d544 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:18:17, skipping insertion in model container [2019-11-06 21:18:17,195 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:18:17" (1/1) ... [2019-11-06 21:18:17,200 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 21:18:17,242 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 21:18:17,713 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 21:18:17,721 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 21:18:17,763 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 21:18:17,831 INFO L192 MainTranslator]: Completed translation [2019-11-06 21:18:17,831 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:18:17 WrapperNode [2019-11-06 21:18:17,832 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 21:18:17,833 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 21:18:17,833 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 21:18:17,833 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 21:18:17,845 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:18:17" (1/1) ... [2019-11-06 21:18:17,845 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:18:17" (1/1) ... [2019-11-06 21:18:17,862 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:18:17" (1/1) ... [2019-11-06 21:18:17,862 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:18:17" (1/1) ... [2019-11-06 21:18:17,885 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:18:17" (1/1) ... [2019-11-06 21:18:17,890 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:18:17" (1/1) ... [2019-11-06 21:18:17,894 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:18:17" (1/1) ... [2019-11-06 21:18:17,900 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 21:18:17,901 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 21:18:17,901 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 21:18:17,901 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 21:18:17,902 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:18:17" (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 [2019-11-06 21:18:17,957 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 21:18:17,957 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 21:18:17,957 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-11-06 21:18:17,957 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-11-06 21:18:17,957 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2019-11-06 21:18:17,957 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2019-11-06 21:18:17,958 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_circular_create [2019-11-06 21:18:17,958 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_circular_remove_last [2019-11-06 21:18:17,958 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 21:18:17,958 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 21:18:17,958 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-11-06 21:18:17,959 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-11-06 21:18:17,959 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-11-06 21:18:17,959 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-11-06 21:18:17,962 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-11-06 21:18:17,963 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-11-06 21:18:17,965 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-11-06 21:18:17,965 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-11-06 21:18:17,965 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-11-06 21:18:17,965 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-11-06 21:18:17,965 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-11-06 21:18:17,966 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-11-06 21:18:17,966 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-11-06 21:18:17,966 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-11-06 21:18:17,966 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-11-06 21:18:17,966 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-11-06 21:18:17,967 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-11-06 21:18:17,967 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-11-06 21:18:17,967 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-11-06 21:18:17,967 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-11-06 21:18:17,967 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-11-06 21:18:17,967 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-11-06 21:18:17,967 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-11-06 21:18:17,968 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-11-06 21:18:17,968 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-11-06 21:18:17,968 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-11-06 21:18:17,968 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-11-06 21:18:17,968 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-11-06 21:18:17,968 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-11-06 21:18:17,968 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-11-06 21:18:17,969 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-11-06 21:18:17,969 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-11-06 21:18:17,969 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-11-06 21:18:17,969 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-11-06 21:18:17,970 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-11-06 21:18:17,970 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-11-06 21:18:17,970 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-11-06 21:18:17,970 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-11-06 21:18:17,970 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-11-06 21:18:17,970 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-11-06 21:18:17,970 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-11-06 21:18:17,971 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-11-06 21:18:17,971 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-11-06 21:18:17,971 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-11-06 21:18:17,971 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-11-06 21:18:17,971 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-11-06 21:18:17,971 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-11-06 21:18:17,971 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-11-06 21:18:17,972 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-11-06 21:18:17,972 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-11-06 21:18:17,972 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-11-06 21:18:17,972 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-11-06 21:18:17,972 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-06 21:18:17,972 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-11-06 21:18:17,972 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-11-06 21:18:17,973 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-06 21:18:17,973 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2019-11-06 21:18:17,973 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-11-06 21:18:17,974 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-11-06 21:18:17,974 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-11-06 21:18:17,974 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-11-06 21:18:17,974 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-11-06 21:18:17,975 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-11-06 21:18:17,975 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-11-06 21:18:17,976 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-11-06 21:18:17,976 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 21:18:17,976 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-11-06 21:18:17,976 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-11-06 21:18:17,976 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-11-06 21:18:17,977 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-11-06 21:18:17,977 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-11-06 21:18:17,977 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-11-06 21:18:17,977 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-11-06 21:18:17,978 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-11-06 21:18:17,978 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-11-06 21:18:17,978 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-11-06 21:18:17,978 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-11-06 21:18:17,979 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-11-06 21:18:17,979 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-11-06 21:18:17,979 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-11-06 21:18:17,979 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-11-06 21:18:17,980 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-11-06 21:18:17,980 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-11-06 21:18:17,980 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-11-06 21:18:17,981 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-11-06 21:18:17,981 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-11-06 21:18:17,981 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-11-06 21:18:17,981 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-11-06 21:18:17,981 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-11-06 21:18:17,981 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-11-06 21:18:17,981 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-11-06 21:18:17,981 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-11-06 21:18:17,982 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-11-06 21:18:17,982 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-11-06 21:18:17,982 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-11-06 21:18:17,982 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-11-06 21:18:17,982 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-11-06 21:18:17,982 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-11-06 21:18:17,982 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-11-06 21:18:17,983 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-11-06 21:18:17,983 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-11-06 21:18:17,983 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-11-06 21:18:17,983 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-11-06 21:18:17,983 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-11-06 21:18:17,983 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-11-06 21:18:17,983 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2019-11-06 21:18:17,983 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2019-11-06 21:18:17,984 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-06 21:18:17,984 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-06 21:18:17,984 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 21:18:17,984 INFO L130 BoogieDeclarations]: Found specification of procedure sll_circular_create [2019-11-06 21:18:17,984 INFO L130 BoogieDeclarations]: Found specification of procedure sll_circular_remove_last [2019-11-06 21:18:17,985 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-06 21:18:17,985 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 21:18:17,985 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 21:18:17,985 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 21:18:17,985 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-11-06 21:18:17,985 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 21:18:17,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 21:18:17,986 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 21:18:18,354 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2019-11-06 21:18:18,584 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 21:18:18,584 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-06 21:18:18,586 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:18:18 BoogieIcfgContainer [2019-11-06 21:18:18,586 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 21:18:18,588 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 21:18:18,588 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 21:18:18,593 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 21:18:18,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:18:17" (1/3) ... [2019-11-06 21:18:18,594 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f869035 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:18:18, skipping insertion in model container [2019-11-06 21:18:18,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:18:17" (2/3) ... [2019-11-06 21:18:18,599 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f869035 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:18:18, skipping insertion in model container [2019-11-06 21:18:18,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:18:18" (3/3) ... [2019-11-06 21:18:18,601 INFO L109 eAbstractionObserver]: Analyzing ICFG sll2c_remove_all_reverse.i [2019-11-06 21:18:18,620 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 21:18:18,630 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 21:18:18,641 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 21:18:18,663 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 21:18:18,663 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 21:18:18,663 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 21:18:18,663 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 21:18:18,663 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 21:18:18,663 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 21:18:18,664 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 21:18:18,664 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 21:18:18,678 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states. [2019-11-06 21:18:18,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-06 21:18:18,685 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:18:18,686 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:18:18,688 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:18:18,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:18:18,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1597421219, now seen corresponding path program 1 times [2019-11-06 21:18:18,703 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:18:18,703 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699993819] [2019-11-06 21:18:18,703 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:18:18,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:18:18,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:18:18,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:18:19,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:18:19,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:18:19,040 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699993819] [2019-11-06 21:18:19,045 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:18:19,045 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 21:18:19,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891699858] [2019-11-06 21:18:19,054 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 21:18:19,054 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:18:19,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 21:18:19,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 21:18:19,073 INFO L87 Difference]: Start difference. First operand 46 states. Second operand 4 states. [2019-11-06 21:18:19,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:18:19,337 INFO L93 Difference]: Finished difference Result 71 states and 90 transitions. [2019-11-06 21:18:19,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 21:18:19,339 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2019-11-06 21:18:19,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:18:19,348 INFO L225 Difference]: With dead ends: 71 [2019-11-06 21:18:19,349 INFO L226 Difference]: Without dead ends: 39 [2019-11-06 21:18:19,352 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 21:18:19,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-06 21:18:19,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-11-06 21:18:19,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-06 21:18:19,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2019-11-06 21:18:19,399 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 24 [2019-11-06 21:18:19,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:18:19,401 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2019-11-06 21:18:19,401 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 21:18:19,402 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2019-11-06 21:18:19,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-06 21:18:19,403 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:18:19,404 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:18:19,404 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:18:19,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:18:19,404 INFO L82 PathProgramCache]: Analyzing trace with hash 657162430, now seen corresponding path program 1 times [2019-11-06 21:18:19,405 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:18:19,405 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343747918] [2019-11-06 21:18:19,405 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:18:19,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:18:19,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:18:19,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:18:19,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:18:19,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:18:19,680 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343747918] [2019-11-06 21:18:19,680 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:18:19,680 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 21:18:19,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733490707] [2019-11-06 21:18:19,685 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 21:18:19,686 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:18:19,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 21:18:19,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-06 21:18:19,687 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand 7 states. [2019-11-06 21:18:19,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:18:19,959 INFO L93 Difference]: Finished difference Result 63 states and 73 transitions. [2019-11-06 21:18:19,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 21:18:19,959 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2019-11-06 21:18:19,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:18:19,961 INFO L225 Difference]: With dead ends: 63 [2019-11-06 21:18:19,961 INFO L226 Difference]: Without dead ends: 42 [2019-11-06 21:18:19,962 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-11-06 21:18:19,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-06 21:18:19,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2019-11-06 21:18:19,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-06 21:18:19,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2019-11-06 21:18:19,972 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 24 [2019-11-06 21:18:19,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:18:19,972 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2019-11-06 21:18:19,972 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 21:18:19,973 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2019-11-06 21:18:19,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-06 21:18:19,974 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:18:19,974 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:18:19,974 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:18:19,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:18:19,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1280322166, now seen corresponding path program 1 times [2019-11-06 21:18:19,975 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:18:19,975 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140236203] [2019-11-06 21:18:19,975 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:18:20,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:18:20,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:18:20,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:18:20,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:18:20,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:18:20,156 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-06 21:18:20,157 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140236203] [2019-11-06 21:18:20,157 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:18:20,157 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 21:18:20,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392296064] [2019-11-06 21:18:20,159 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 21:18:20,159 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:18:20,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 21:18:20,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-06 21:18:20,160 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 6 states. [2019-11-06 21:18:20,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:18:20,361 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2019-11-06 21:18:20,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 21:18:20,361 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2019-11-06 21:18:20,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:18:20,364 INFO L225 Difference]: With dead ends: 47 [2019-11-06 21:18:20,364 INFO L226 Difference]: Without dead ends: 43 [2019-11-06 21:18:20,365 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-11-06 21:18:20,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-06 21:18:20,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2019-11-06 21:18:20,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-06 21:18:20,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2019-11-06 21:18:20,378 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 32 [2019-11-06 21:18:20,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:18:20,379 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2019-11-06 21:18:20,379 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 21:18:20,379 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2019-11-06 21:18:20,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-06 21:18:20,382 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:18:20,382 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:18:20,382 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:18:20,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:18:20,383 INFO L82 PathProgramCache]: Analyzing trace with hash 410004661, now seen corresponding path program 1 times [2019-11-06 21:18:20,383 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:18:20,384 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538708256] [2019-11-06 21:18:20,384 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:18:20,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:18:20,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:18:20,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:18:20,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:18:20,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:18:20,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:18:20,610 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-06 21:18:20,611 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538708256] [2019-11-06 21:18:20,611 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:18:20,611 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-11-06 21:18:20,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584796021] [2019-11-06 21:18:20,613 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 21:18:20,613 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:18:20,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 21:18:20,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-11-06 21:18:20,615 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 9 states. [2019-11-06 21:18:21,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:18:21,016 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2019-11-06 21:18:21,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 21:18:21,016 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2019-11-06 21:18:21,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:18:21,018 INFO L225 Difference]: With dead ends: 58 [2019-11-06 21:18:21,018 INFO L226 Difference]: Without dead ends: 41 [2019-11-06 21:18:21,018 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2019-11-06 21:18:21,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-06 21:18:21,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-11-06 21:18:21,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-06 21:18:21,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2019-11-06 21:18:21,028 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 42 [2019-11-06 21:18:21,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:18:21,028 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2019-11-06 21:18:21,028 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 21:18:21,028 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2019-11-06 21:18:21,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-06 21:18:21,029 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:18:21,030 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:18:21,030 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:18:21,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:18:21,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1436962146, now seen corresponding path program 1 times [2019-11-06 21:18:21,031 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:18:21,031 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269085315] [2019-11-06 21:18:21,031 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:18:21,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:18:21,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:18:21,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:18:21,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:18:21,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:18:21,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:18:21,183 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-06 21:18:21,184 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269085315] [2019-11-06 21:18:21,184 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:18:21,184 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 21:18:21,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876128973] [2019-11-06 21:18:21,185 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 21:18:21,185 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:18:21,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 21:18:21,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-11-06 21:18:21,186 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 7 states. [2019-11-06 21:18:21,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:18:21,385 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2019-11-06 21:18:21,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 21:18:21,385 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 45 [2019-11-06 21:18:21,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:18:21,386 INFO L225 Difference]: With dead ends: 62 [2019-11-06 21:18:21,386 INFO L226 Difference]: Without dead ends: 43 [2019-11-06 21:18:21,387 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-11-06 21:18:21,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-06 21:18:21,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-11-06 21:18:21,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-06 21:18:21,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2019-11-06 21:18:21,395 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 45 [2019-11-06 21:18:21,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:18:21,395 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2019-11-06 21:18:21,395 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 21:18:21,395 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2019-11-06 21:18:21,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-06 21:18:21,397 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:18:21,397 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:18:21,397 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:18:21,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:18:21,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1302090595, now seen corresponding path program 1 times [2019-11-06 21:18:21,398 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:18:21,398 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135443255] [2019-11-06 21:18:21,398 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:18:21,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:18:21,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:18:21,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:18:21,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:18:21,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:18:21,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:18:21,558 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-06 21:18:21,559 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135443255] [2019-11-06 21:18:21,559 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471101161] [2019-11-06 21:18:21,559 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:18:21,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:18:21,707 INFO L256 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 21:18:21,716 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:18:21,786 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-06 21:18:21,789 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 21:18:21,789 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 10 [2019-11-06 21:18:21,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984213236] [2019-11-06 21:18:21,790 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 21:18:21,790 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:18:21,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 21:18:21,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-11-06 21:18:21,791 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 10 states. [2019-11-06 21:18:22,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:18:22,009 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2019-11-06 21:18:22,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 21:18:22,010 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 47 [2019-11-06 21:18:22,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:18:22,011 INFO L225 Difference]: With dead ends: 52 [2019-11-06 21:18:22,011 INFO L226 Difference]: Without dead ends: 48 [2019-11-06 21:18:22,012 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-11-06 21:18:22,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-06 21:18:22,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2019-11-06 21:18:22,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-06 21:18:22,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2019-11-06 21:18:22,019 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 47 [2019-11-06 21:18:22,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:18:22,020 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2019-11-06 21:18:22,020 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 21:18:22,020 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2019-11-06 21:18:22,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-11-06 21:18:22,022 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:18:22,022 INFO L410 BasicCegarLoop]: trace histogram [4, 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] [2019-11-06 21:18:22,226 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:18:22,227 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:18:22,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:18:22,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1450863914, now seen corresponding path program 2 times [2019-11-06 21:18:22,228 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:18:22,228 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248338649] [2019-11-06 21:18:22,228 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:18:22,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:18:22,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:18:22,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:18:22,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:18:22,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:18:22,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:18:23,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:18:23,365 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 21:18:23,366 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248338649] [2019-11-06 21:18:23,366 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516630836] [2019-11-06 21:18:23,366 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:18:23,530 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 21:18:23,530 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:18:23,534 INFO L256 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 87 conjunts are in the unsatisfiable core [2019-11-06 21:18:23,542 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:18:23,801 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-06 21:18:23,802 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 21:18:23,809 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:18:23,811 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-06 21:18:23,811 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:20, output treesize:16 [2019-11-06 21:18:24,413 INFO L341 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2019-11-06 21:18:24,414 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 46 [2019-11-06 21:18:24,416 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 21:18:24,433 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:18:24,438 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 21:18:24,440 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 40 [2019-11-06 21:18:24,441 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-06 21:18:24,451 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:18:24,451 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 21:18:24,452 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:74, output treesize:46 [2019-11-06 21:18:24,627 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 21:18:24,628 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 21:18:24,628 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 19] total 39 [2019-11-06 21:18:24,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762545449] [2019-11-06 21:18:24,629 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-11-06 21:18:24,629 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:18:24,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-11-06 21:18:24,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1378, Unknown=0, NotChecked=0, Total=1482 [2019-11-06 21:18:24,631 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 39 states. [2019-11-06 21:18:25,979 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2019-11-06 21:18:27,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:18:27,421 INFO L93 Difference]: Finished difference Result 96 states and 112 transitions. [2019-11-06 21:18:27,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-06 21:18:27,422 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 62 [2019-11-06 21:18:27,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:18:27,428 INFO L225 Difference]: With dead ends: 96 [2019-11-06 21:18:27,428 INFO L226 Difference]: Without dead ends: 70 [2019-11-06 21:18:27,431 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=330, Invalid=3830, Unknown=0, NotChecked=0, Total=4160 [2019-11-06 21:18:27,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-11-06 21:18:27,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 53. [2019-11-06 21:18:27,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-06 21:18:27,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2019-11-06 21:18:27,450 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 62 [2019-11-06 21:18:27,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:18:27,450 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2019-11-06 21:18:27,450 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-11-06 21:18:27,450 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2019-11-06 21:18:27,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-11-06 21:18:27,455 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:18:27,458 INFO L410 BasicCegarLoop]: trace histogram [4, 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] [2019-11-06 21:18:27,658 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:18:27,659 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:18:27,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:18:27,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1060298193, now seen corresponding path program 1 times [2019-11-06 21:18:27,660 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:18:27,661 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20509660] [2019-11-06 21:18:27,661 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:18:27,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:18:27,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:18:27,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:18:27,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:18:27,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:18:27,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:18:27,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:18:27,818 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-06 21:18:27,819 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20509660] [2019-11-06 21:18:27,819 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410984066] [2019-11-06 21:18:27,819 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:18:28,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:18:28,006 INFO L256 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-06 21:18:28,025 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:18:28,102 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:18:28,102 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 48 [2019-11-06 21:18:28,105 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:18:28,109 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:18:28,112 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-06 21:18:28,130 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:18:28,332 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:18:28,333 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: java.lang.UnsupportedOperationException: expected NNF at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:188) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:178) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:83) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:463) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.lang.UnsupportedOperationException: expected NNF at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder$MyWalker.walk(ArrayOccurrenceAnalysis.java:236) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive$TermWalker.walk(NonRecursive.java:139) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder$MyWalker.walk(ArrayOccurrenceAnalysis.java:195) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder.(ArrayOccurrenceAnalysis.java:181) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis.(ArrayOccurrenceAnalysis.java:74) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:275) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimOneRec(ElimStorePlain.java:253) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.eliminateOne(ElimStorePlain.java:553) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:466) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:216) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:306) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:245) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:200) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:292) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:294) ... 21 more [2019-11-06 21:18:28,342 INFO L168 Benchmark]: Toolchain (without parser) took 11155.27 ms. Allocated memory was 145.8 MB in the beginning and 309.9 MB in the end (delta: 164.1 MB). Free memory was 102.3 MB in the beginning and 103.1 MB in the end (delta: -813.1 kB). Peak memory consumption was 163.3 MB. Max. memory is 7.1 GB. [2019-11-06 21:18:28,345 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 145.8 MB. Free memory is still 121.7 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-11-06 21:18:28,347 INFO L168 Benchmark]: CACSL2BoogieTranslator took 645.82 ms. Allocated memory was 145.8 MB in the beginning and 203.4 MB in the end (delta: 57.7 MB). Free memory was 102.3 MB in the beginning and 168.3 MB in the end (delta: -66.1 MB). Peak memory consumption was 21.6 MB. Max. memory is 7.1 GB. [2019-11-06 21:18:28,348 INFO L168 Benchmark]: Boogie Preprocessor took 67.41 ms. Allocated memory is still 203.4 MB. Free memory was 168.3 MB in the beginning and 165.5 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. [2019-11-06 21:18:28,349 INFO L168 Benchmark]: RCFGBuilder took 685.86 ms. Allocated memory is still 203.4 MB. Free memory was 165.5 MB in the beginning and 118.4 MB in the end (delta: 47.1 MB). Peak memory consumption was 47.1 MB. Max. memory is 7.1 GB. [2019-11-06 21:18:28,354 INFO L168 Benchmark]: TraceAbstraction took 9751.38 ms. Allocated memory was 203.4 MB in the beginning and 309.9 MB in the end (delta: 106.4 MB). Free memory was 117.4 MB in the beginning and 103.1 MB in the end (delta: 14.3 MB). Peak memory consumption was 120.8 MB. Max. memory is 7.1 GB. [2019-11-06 21:18:28,361 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 145.8 MB. Free memory is still 121.7 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 645.82 ms. Allocated memory was 145.8 MB in the beginning and 203.4 MB in the end (delta: 57.7 MB). Free memory was 102.3 MB in the beginning and 168.3 MB in the end (delta: -66.1 MB). Peak memory consumption was 21.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 67.41 ms. Allocated memory is still 203.4 MB. Free memory was 168.3 MB in the beginning and 165.5 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 685.86 ms. Allocated memory is still 203.4 MB. Free memory was 165.5 MB in the beginning and 118.4 MB in the end (delta: 47.1 MB). Peak memory consumption was 47.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 9751.38 ms. Allocated memory was 203.4 MB in the beginning and 309.9 MB in the end (delta: 106.4 MB). Free memory was 117.4 MB in the beginning and 103.1 MB in the end (delta: 14.3 MB). Peak memory consumption was 120.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: java.lang.UnsupportedOperationException: expected NNF de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: java.lang.UnsupportedOperationException: expected NNF: de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:302) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...