/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/forester-heap/dll-circular-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 13:42:14,926 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 13:42:14,928 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 13:42:14,941 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 13:42:14,941 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 13:42:14,942 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 13:42:14,944 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 13:42:14,946 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 13:42:14,948 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 13:42:14,948 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 13:42:14,949 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 13:42:14,951 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 13:42:14,951 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 13:42:14,952 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 13:42:14,953 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 13:42:14,954 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 13:42:14,955 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 13:42:14,956 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 13:42:14,957 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 13:42:14,959 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 13:42:14,961 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 13:42:14,962 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 13:42:14,963 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 13:42:14,964 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 13:42:14,966 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 13:42:14,966 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 13:42:14,967 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 13:42:14,967 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 13:42:14,968 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 13:42:14,969 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 13:42:14,969 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 13:42:14,970 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 13:42:14,971 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 13:42:14,971 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 13:42:14,972 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 13:42:14,973 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 13:42:14,973 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 13:42:14,973 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 13:42:14,974 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 13:42:14,974 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 13:42:14,975 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 13:42:14,976 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 [2020-07-21 13:42:14,991 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 13:42:14,991 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 13:42:14,992 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 13:42:14,993 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 13:42:14,993 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 13:42:14,993 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 13:42:14,993 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 13:42:14,993 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 13:42:14,994 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 13:42:14,994 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 13:42:14,994 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 13:42:14,994 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 13:42:14,994 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 13:42:14,995 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 13:42:14,995 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 13:42:14,995 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 13:42:14,995 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 13:42:14,996 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 13:42:14,996 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 13:42:14,996 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 13:42:14,996 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 13:42:14,996 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 13:42:14,997 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 13:42:14,997 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 13:42:14,997 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 13:42:14,997 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 13:42:14,998 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:42:14,998 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 13:42:14,998 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 13:42:14,998 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 13:42:15,325 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 13:42:15,339 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 13:42:15,343 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 13:42:15,344 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 13:42:15,345 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 13:42:15,345 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-circular-1.i [2020-07-21 13:42:15,412 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06f4d3fa3/3fae51ecad5744578bacc5432d71c40e/FLAGfdc805cf1 [2020-07-21 13:42:15,939 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 13:42:15,940 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/dll-circular-1.i [2020-07-21 13:42:15,956 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06f4d3fa3/3fae51ecad5744578bacc5432d71c40e/FLAGfdc805cf1 [2020-07-21 13:42:16,253 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06f4d3fa3/3fae51ecad5744578bacc5432d71c40e [2020-07-21 13:42:16,261 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 13:42:16,264 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 13:42:16,265 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 13:42:16,265 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 13:42:16,269 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 13:42:16,270 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:42:16" (1/1) ... [2020-07-21 13:42:16,272 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b71092a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:16, skipping insertion in model container [2020-07-21 13:42:16,273 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:42:16" (1/1) ... [2020-07-21 13:42:16,280 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 13:42:16,347 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 13:42:16,799 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 13:42:16,810 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 13:42:16,855 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 13:42:16,916 INFO L208 MainTranslator]: Completed translation [2020-07-21 13:42:16,916 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:16 WrapperNode [2020-07-21 13:42:16,917 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 13:42:16,918 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 13:42:16,918 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 13:42:16,918 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 13:42:16,931 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:16" (1/1) ... [2020-07-21 13:42:16,932 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:16" (1/1) ... [2020-07-21 13:42:16,948 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:16" (1/1) ... [2020-07-21 13:42:16,948 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:16" (1/1) ... [2020-07-21 13:42:16,965 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:16" (1/1) ... [2020-07-21 13:42:16,971 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:16" (1/1) ... [2020-07-21 13:42:16,975 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:16" (1/1) ... [2020-07-21 13:42:16,981 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 13:42:16,981 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 13:42:16,981 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 13:42:16,982 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 13:42:16,982 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:16" (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 [2020-07-21 13:42:17,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 13:42:17,055 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 13:42:17,055 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 13:42:17,055 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-21 13:42:17,055 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-21 13:42:17,055 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-21 13:42:17,055 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-21 13:42:17,056 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-21 13:42:17,056 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-21 13:42:17,056 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-21 13:42:17,056 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-21 13:42:17,056 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-21 13:42:17,056 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-21 13:42:17,056 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-21 13:42:17,057 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-21 13:42:17,057 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-21 13:42:17,057 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-21 13:42:17,057 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-21 13:42:17,057 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-21 13:42:17,057 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-21 13:42:17,058 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-21 13:42:17,058 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-21 13:42:17,058 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-21 13:42:17,058 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-21 13:42:17,058 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-21 13:42:17,058 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-21 13:42:17,059 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-21 13:42:17,059 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-21 13:42:17,059 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-21 13:42:17,059 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-21 13:42:17,059 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-21 13:42:17,059 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-21 13:42:17,060 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-21 13:42:17,060 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-21 13:42:17,060 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-21 13:42:17,060 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-21 13:42:17,060 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-21 13:42:17,060 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-21 13:42:17,061 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-21 13:42:17,061 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-21 13:42:17,061 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-21 13:42:17,061 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-21 13:42:17,061 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-21 13:42:17,061 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-21 13:42:17,061 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-21 13:42:17,061 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-21 13:42:17,062 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-21 13:42:17,062 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-21 13:42:17,062 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-21 13:42:17,062 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-21 13:42:17,062 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-21 13:42:17,062 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-21 13:42:17,063 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-21 13:42:17,063 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 13:42:17,063 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-21 13:42:17,063 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-21 13:42:17,063 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-21 13:42:17,063 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-07-21 13:42:17,063 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-21 13:42:17,063 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-21 13:42:17,064 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-21 13:42:17,064 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-21 13:42:17,064 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 13:42:17,064 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-21 13:42:17,064 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-21 13:42:17,064 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-21 13:42:17,064 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-21 13:42:17,065 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-21 13:42:17,065 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-21 13:42:17,065 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-21 13:42:17,065 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-21 13:42:17,065 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-21 13:42:17,065 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-21 13:42:17,065 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-21 13:42:17,066 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-21 13:42:17,066 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-21 13:42:17,066 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-21 13:42:17,066 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-21 13:42:17,066 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-21 13:42:17,066 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-21 13:42:17,067 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-21 13:42:17,067 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-21 13:42:17,067 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-21 13:42:17,067 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-21 13:42:17,067 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-21 13:42:17,067 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-21 13:42:17,067 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-21 13:42:17,068 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-21 13:42:17,068 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-21 13:42:17,068 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-21 13:42:17,068 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-21 13:42:17,068 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-21 13:42:17,068 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-21 13:42:17,068 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-21 13:42:17,069 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-21 13:42:17,069 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-21 13:42:17,069 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-21 13:42:17,069 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-21 13:42:17,069 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-21 13:42:17,069 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-21 13:42:17,069 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-21 13:42:17,070 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-21 13:42:17,070 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-21 13:42:17,070 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-21 13:42:17,070 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-21 13:42:17,070 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-21 13:42:17,070 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 13:42:17,070 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 13:42:17,070 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 13:42:17,070 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 13:42:17,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-21 13:42:17,071 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 13:42:17,071 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-21 13:42:17,071 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 13:42:17,071 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 13:42:17,071 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 13:42:17,071 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 13:42:17,585 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 13:42:17,585 INFO L295 CfgBuilder]: Removed 9 assume(true) statements. [2020-07-21 13:42:17,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:42:17 BoogieIcfgContainer [2020-07-21 13:42:17,590 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 13:42:17,592 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 13:42:17,592 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 13:42:17,595 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 13:42:17,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:42:16" (1/3) ... [2020-07-21 13:42:17,597 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fd02faf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:42:17, skipping insertion in model container [2020-07-21 13:42:17,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:16" (2/3) ... [2020-07-21 13:42:17,597 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fd02faf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:42:17, skipping insertion in model container [2020-07-21 13:42:17,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:42:17" (3/3) ... [2020-07-21 13:42:17,600 INFO L109 eAbstractionObserver]: Analyzing ICFG dll-circular-1.i [2020-07-21 13:42:17,611 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 13:42:17,619 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-07-21 13:42:17,635 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-07-21 13:42:17,661 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 13:42:17,661 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 13:42:17,661 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 13:42:17,662 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 13:42:17,662 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 13:42:17,662 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 13:42:17,662 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 13:42:17,663 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 13:42:17,682 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-07-21 13:42:17,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 13:42:17,689 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:42:17,690 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:42:17,691 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:42:17,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:42:17,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1483997276, now seen corresponding path program 1 times [2020-07-21 13:42:17,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:42:17,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1158485775] [2020-07-21 13:42:17,709 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:42:17,875 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 13:42:17,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:42:17,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 13:42:17,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:42:17,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 13:42:17,998 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2020-07-21 13:42:17,999 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:42:18,016 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:42:18,017 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 13:42:18,017 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:18 [2020-07-21 13:42:18,064 INFO L544 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 13:42:18,075 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:42:18,080 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2020-07-21 13:42:18,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 13:42:18,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 13:42:18,092 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-21 13:42:18,093 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-21 13:42:18,095 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:42:18,095 INFO L544 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 13:42:18,101 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:42:18,103 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 13:42:18,103 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:41, output treesize:4 [2020-07-21 13:42:18,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 13:42:18,110 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:42:18,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1158485775] [2020-07-21 13:42:18,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:42:18,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 13:42:18,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835356291] [2020-07-21 13:42:18,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 13:42:18,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:42:18,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 13:42:18,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 13:42:18,136 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 4 states. [2020-07-21 13:42:18,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:42:18,233 INFO L93 Difference]: Finished difference Result 83 states and 130 transitions. [2020-07-21 13:42:18,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 13:42:18,235 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-07-21 13:42:18,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:42:18,246 INFO L225 Difference]: With dead ends: 83 [2020-07-21 13:42:18,246 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 13:42:18,250 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 13:42:18,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 13:42:18,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 32. [2020-07-21 13:42:18,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-21 13:42:18,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2020-07-21 13:42:18,293 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 10 [2020-07-21 13:42:18,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:42:18,293 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2020-07-21 13:42:18,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 13:42:18,294 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2020-07-21 13:42:18,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 13:42:18,294 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:42:18,295 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:42:18,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:42:18,510 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:42:18,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:42:18,511 INFO L82 PathProgramCache]: Analyzing trace with hash -97127833, now seen corresponding path program 1 times [2020-07-21 13:42:18,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:42:18,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1681491195] [2020-07-21 13:42:18,512 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:42:18,621 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 13:42:18,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:42:18,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 13:42:18,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:42:18,641 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2020-07-21 13:42:18,642 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:42:18,649 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:42:18,649 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 13:42:18,650 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-07-21 13:42:18,682 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:42:18,683 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2020-07-21 13:42:18,685 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 13:42:18,688 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:42:18,704 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:42:18,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 13:42:18,762 INFO L350 Elim1Store]: treesize reduction 30, result has 57.7 percent of original size [2020-07-21 13:42:18,763 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 67 treesize of output 51 [2020-07-21 13:42:18,764 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 13:42:18,797 INFO L624 ElimStorePlain]: treesize reduction 24, result has 59.3 percent of original size [2020-07-21 13:42:18,800 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 13:42:18,800 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:111, output treesize:32 [2020-07-21 13:42:20,860 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 13:42:20,881 INFO L440 ElimStorePlain]: Different costs {2=[|#memory_$Pointer$.base|], 12=[|v_#memory_$Pointer$.base_22|]} [2020-07-21 13:42:20,885 INFO L544 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 13:42:20,908 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:42:20,949 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:42:20,950 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 82 [2020-07-21 13:42:20,956 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 3, 2, 1] term [2020-07-21 13:42:20,957 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 13:42:20,959 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 13:42:20,972 INFO L624 ElimStorePlain]: treesize reduction 11, result has 45.0 percent of original size [2020-07-21 13:42:20,972 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 13:42:20,973 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:79, output treesize:4 [2020-07-21 13:42:20,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 13:42:20,983 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:42:20,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1681491195] [2020-07-21 13:42:20,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:42:20,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 13:42:20,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845074836] [2020-07-21 13:42:20,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 13:42:20,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:42:20,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 13:42:20,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-21 13:42:20,989 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 5 states. [2020-07-21 13:42:23,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:42:23,212 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2020-07-21 13:42:23,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 13:42:23,213 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 13:42:23,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:42:23,216 INFO L225 Difference]: With dead ends: 50 [2020-07-21 13:42:23,216 INFO L226 Difference]: Without dead ends: 48 [2020-07-21 13:42:23,218 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-21 13:42:23,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-21 13:42:23,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 35. [2020-07-21 13:42:23,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 13:42:23,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2020-07-21 13:42:23,232 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 14 [2020-07-21 13:42:23,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:42:23,232 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2020-07-21 13:42:23,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 13:42:23,240 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2020-07-21 13:42:23,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 13:42:23,241 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:42:23,241 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:42:23,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:42:23,443 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:42:23,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:42:23,444 INFO L82 PathProgramCache]: Analyzing trace with hash 2075944349, now seen corresponding path program 1 times [2020-07-21 13:42:23,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:42:23,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [21924095] [2020-07-21 13:42:23,445 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:42:23,576 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:42:23,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 13:42:23,576 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 13:42:23,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 13:42:23,594 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 13:42:23,617 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 13:42:23,618 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 13:42:23,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:42:23,861 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 01:42:23 BoogieIcfgContainer [2020-07-21 13:42:23,862 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 13:42:23,864 INFO L168 Benchmark]: Toolchain (without parser) took 7601.14 ms. Allocated memory was 136.3 MB in the beginning and 254.8 MB in the end (delta: 118.5 MB). Free memory was 99.3 MB in the beginning and 213.6 MB in the end (delta: -114.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 7.1 GB. [2020-07-21 13:42:23,864 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 136.3 MB. Free memory is still 119.2 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-21 13:42:23,865 INFO L168 Benchmark]: CACSL2BoogieTranslator took 652.18 ms. Allocated memory was 136.3 MB in the beginning and 198.2 MB in the end (delta: 61.9 MB). Free memory was 98.9 MB in the beginning and 164.7 MB in the end (delta: -65.8 MB). Peak memory consumption was 25.9 MB. Max. memory is 7.1 GB. [2020-07-21 13:42:23,866 INFO L168 Benchmark]: Boogie Preprocessor took 63.41 ms. Allocated memory is still 198.2 MB. Free memory was 164.7 MB in the beginning and 161.8 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. [2020-07-21 13:42:23,866 INFO L168 Benchmark]: RCFGBuilder took 609.01 ms. Allocated memory is still 198.2 MB. Free memory was 161.8 MB in the beginning and 116.6 MB in the end (delta: 45.2 MB). Peak memory consumption was 45.2 MB. Max. memory is 7.1 GB. [2020-07-21 13:42:23,867 INFO L168 Benchmark]: TraceAbstraction took 6270.17 ms. Allocated memory was 198.2 MB in the beginning and 254.8 MB in the end (delta: 56.6 MB). Free memory was 116.6 MB in the beginning and 213.6 MB in the end (delta: -97.0 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-21 13:42:23,871 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 136.3 MB. Free memory is still 119.2 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 652.18 ms. Allocated memory was 136.3 MB in the beginning and 198.2 MB in the end (delta: 61.9 MB). Free memory was 98.9 MB in the beginning and 164.7 MB in the end (delta: -65.8 MB). Peak memory consumption was 25.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 63.41 ms. Allocated memory is still 198.2 MB. Free memory was 164.7 MB in the beginning and 161.8 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 609.01 ms. Allocated memory is still 198.2 MB. Free memory was 161.8 MB in the beginning and 116.6 MB in the end (delta: 45.2 MB). Peak memory consumption was 45.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6270.17 ms. Allocated memory was 198.2 MB in the beginning and 254.8 MB in the end (delta: 56.6 MB). Free memory was 116.6 MB in the beginning and 213.6 MB in the end (delta: -97.0 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1023]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L986] SLL* head = malloc(sizeof(SLL)); [L987] head->next = head [L988] head->data = 0 [L990] SLL* x = head; [L991] int state = 1; VAL [head={-1:0}, malloc(sizeof(SLL))={-1:0}, state=1, x={-1:0}] [L994] COND FALSE !(__VERIFIER_nondet_int()) [L1016] x->data = state [L1018] EXPR head->next [L1018] x = head->next [L1019] COND FALSE !(!(((void*)0) != x)) VAL [head={-1:0}, malloc(sizeof(SLL))={-1:0}, state=1, x={-1:0}] [L1021] EXPR x->data VAL [head={-1:0}, malloc(sizeof(SLL))={-1:0}, state=1, x={-1:0}, x->data=1] [L1021] COND TRUE x->data != 0 [L1023] EXPR x->next [L1023] EXPR x->next->data [L1023] EXPR x->next->data != 0 && x->data > x->next->data [L1023] EXPR x->data [L1023] EXPR x->next [L1023] EXPR x->next->data [L1023] EXPR x->next->data != 0 && x->data > x->next->data VAL [head={-1:0}, malloc(sizeof(SLL))={-1:0}, state=1, x={-1:0}, x->data=1, x->next={-1:0}, x->next={-1:0}, x->next->data=1, x->next->data=1, x->next->data != 0 && x->data > x->next->data=0] [L1023] COND TRUE !(x->next->data != 0 && x->data > x->next->data) [L1023] __VERIFIER_error() VAL [head={-1:0}, malloc(sizeof(SLL))={-1:0}, state=1, x={-1:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 38 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.1s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 2.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 69 SDtfs, 58 SDslu, 105 SDs, 0 SdLazy, 80 SolverSat, 8 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 2.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 23 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.5s InterpolantComputationTime, 41 NumberOfCodeBlocks, 29 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 22 ConstructedInterpolants, 4 QuantifiedInterpolants, 2572 SizeOfPredicates, 10 NumberOfNonLiveVariables, 116 ConjunctsInSsa, 29 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 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...