/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/forester-heap/dll-sorted-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 16:18:14,193 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 16:18:14,196 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 16:18:14,221 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 16:18:14,222 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 16:18:14,223 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 16:18:14,224 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 16:18:14,226 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 16:18:14,228 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 16:18:14,229 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 16:18:14,230 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 16:18:14,231 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 16:18:14,231 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 16:18:14,232 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 16:18:14,233 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 16:18:14,234 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 16:18:14,235 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 16:18:14,236 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 16:18:14,240 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 16:18:14,243 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 16:18:14,247 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 16:18:14,248 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 16:18:14,249 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 16:18:14,252 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 16:18:14,255 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 16:18:14,256 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 16:18:14,257 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 16:18:14,258 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 16:18:14,259 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 16:18:14,260 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 16:18:14,260 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 16:18:14,262 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 16:18:14,263 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 16:18:14,264 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 16:18:14,265 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 16:18:14,266 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 16:18:14,266 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 16:18:14,266 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 16:18:14,267 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 16:18:14,275 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 16:18:14,276 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 16:18:14,280 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 16:18:14,322 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 16:18:14,322 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 16:18:14,325 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 16:18:14,325 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 16:18:14,326 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 16:18:14,326 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 16:18:14,326 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 16:18:14,326 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 16:18:14,327 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 16:18:14,327 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 16:18:14,328 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 16:18:14,328 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 16:18:14,328 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 16:18:14,329 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 16:18:14,329 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 16:18:14,329 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 16:18:14,329 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 16:18:14,330 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 16:18:14,330 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 16:18:14,330 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 16:18:14,330 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 16:18:14,330 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 16:18:14,331 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 16:18:14,331 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 16:18:14,331 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 16:18:14,331 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 16:18:14,331 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 16:18:14,332 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 16:18:14,332 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 16:18:14,332 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 -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true [2020-08-18 16:18:14,664 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 16:18:14,677 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 16:18:14,681 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 16:18:14,682 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 16:18:14,683 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 16:18:14,684 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-sorted-1.i [2020-08-18 16:18:14,748 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0d895e526/814db37f31d74dccac7f26b372bbfaba/FLAGdc29a4eba [2020-08-18 16:18:15,311 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 16:18:15,312 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/dll-sorted-1.i [2020-08-18 16:18:15,323 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0d895e526/814db37f31d74dccac7f26b372bbfaba/FLAGdc29a4eba [2020-08-18 16:18:15,571 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0d895e526/814db37f31d74dccac7f26b372bbfaba [2020-08-18 16:18:15,582 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 16:18:15,584 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 16:18:15,585 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 16:18:15,585 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 16:18:15,589 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 16:18:15,590 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 04:18:15" (1/1) ... [2020-08-18 16:18:15,593 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@780fc4fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:18:15, skipping insertion in model container [2020-08-18 16:18:15,593 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 04:18:15" (1/1) ... [2020-08-18 16:18:15,601 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 16:18:15,662 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 16:18:16,152 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 16:18:16,163 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 16:18:16,213 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 16:18:16,275 INFO L208 MainTranslator]: Completed translation [2020-08-18 16:18:16,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:18:16 WrapperNode [2020-08-18 16:18:16,278 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 16:18:16,278 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 16:18:16,278 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 16:18:16,279 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 16:18:16,292 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:18:16" (1/1) ... [2020-08-18 16:18:16,292 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:18:16" (1/1) ... [2020-08-18 16:18:16,310 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:18:16" (1/1) ... [2020-08-18 16:18:16,310 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:18:16" (1/1) ... [2020-08-18 16:18:16,331 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:18:16" (1/1) ... [2020-08-18 16:18:16,341 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:18:16" (1/1) ... [2020-08-18 16:18:16,345 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:18:16" (1/1) ... [2020-08-18 16:18:16,353 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 16:18:16,353 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 16:18:16,353 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 16:18:16,353 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 16:18:16,354 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:18:16" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 16:18:16,412 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 16:18:16,412 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 16:18:16,412 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 16:18:16,412 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-08-18 16:18:16,412 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-08-18 16:18:16,413 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-08-18 16:18:16,413 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-08-18 16:18:16,413 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-08-18 16:18:16,413 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-08-18 16:18:16,413 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-08-18 16:18:16,413 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-08-18 16:18:16,414 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-08-18 16:18:16,414 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-08-18 16:18:16,414 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-08-18 16:18:16,414 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-08-18 16:18:16,414 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-08-18 16:18:16,415 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-08-18 16:18:16,415 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-08-18 16:18:16,415 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-08-18 16:18:16,415 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-08-18 16:18:16,415 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-08-18 16:18:16,415 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-08-18 16:18:16,415 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-08-18 16:18:16,416 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-08-18 16:18:16,416 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-08-18 16:18:16,416 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-08-18 16:18:16,416 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-08-18 16:18:16,416 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-08-18 16:18:16,417 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-08-18 16:18:16,417 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-08-18 16:18:16,417 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-08-18 16:18:16,417 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-08-18 16:18:16,417 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-08-18 16:18:16,417 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-08-18 16:18:16,417 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-08-18 16:18:16,418 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-08-18 16:18:16,418 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-08-18 16:18:16,418 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-08-18 16:18:16,418 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-08-18 16:18:16,418 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-08-18 16:18:16,418 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-08-18 16:18:16,419 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-08-18 16:18:16,419 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-08-18 16:18:16,419 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-08-18 16:18:16,419 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-08-18 16:18:16,419 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-08-18 16:18:16,419 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-08-18 16:18:16,419 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-08-18 16:18:16,420 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-08-18 16:18:16,420 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-08-18 16:18:16,420 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-08-18 16:18:16,420 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-08-18 16:18:16,420 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-08-18 16:18:16,420 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 16:18:16,421 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-18 16:18:16,421 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-18 16:18:16,421 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-18 16:18:16,421 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-08-18 16:18:16,421 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-08-18 16:18:16,421 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-18 16:18:16,422 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-08-18 16:18:16,422 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-08-18 16:18:16,422 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 16:18:16,422 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-08-18 16:18:16,422 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-08-18 16:18:16,422 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-08-18 16:18:16,422 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-18 16:18:16,423 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-08-18 16:18:16,423 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-08-18 16:18:16,423 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-08-18 16:18:16,423 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-08-18 16:18:16,423 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-08-18 16:18:16,423 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-08-18 16:18:16,424 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-08-18 16:18:16,424 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-08-18 16:18:16,424 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-08-18 16:18:16,424 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-08-18 16:18:16,424 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-08-18 16:18:16,424 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-08-18 16:18:16,425 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-08-18 16:18:16,425 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-08-18 16:18:16,425 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-08-18 16:18:16,425 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-08-18 16:18:16,425 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-08-18 16:18:16,425 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-08-18 16:18:16,425 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-08-18 16:18:16,426 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-08-18 16:18:16,426 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-08-18 16:18:16,426 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-08-18 16:18:16,426 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-08-18 16:18:16,426 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-08-18 16:18:16,426 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-08-18 16:18:16,427 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-08-18 16:18:16,427 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-08-18 16:18:16,427 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-08-18 16:18:16,427 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-08-18 16:18:16,427 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-08-18 16:18:16,427 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-08-18 16:18:16,427 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-08-18 16:18:16,428 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-08-18 16:18:16,428 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-08-18 16:18:16,428 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-08-18 16:18:16,428 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-08-18 16:18:16,428 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-08-18 16:18:16,428 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-08-18 16:18:16,428 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-08-18 16:18:16,429 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 16:18:16,429 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 16:18:16,429 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 16:18:16,429 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 16:18:16,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-18 16:18:16,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 16:18:16,429 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-18 16:18:16,429 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 16:18:16,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 16:18:16,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 16:18:16,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 16:18:17,049 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 16:18:17,054 INFO L295 CfgBuilder]: Removed 18 assume(true) statements. [2020-08-18 16:18:17,064 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 04:18:17 BoogieIcfgContainer [2020-08-18 16:18:17,064 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 16:18:17,067 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 16:18:17,067 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 16:18:17,071 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 16:18:17,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 04:18:15" (1/3) ... [2020-08-18 16:18:17,072 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d785391 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 04:18:17, skipping insertion in model container [2020-08-18 16:18:17,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:18:16" (2/3) ... [2020-08-18 16:18:17,074 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d785391 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 04:18:17, skipping insertion in model container [2020-08-18 16:18:17,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 04:18:17" (3/3) ... [2020-08-18 16:18:17,076 INFO L109 eAbstractionObserver]: Analyzing ICFG dll-sorted-1.i [2020-08-18 16:18:17,087 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 16:18:17,099 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2020-08-18 16:18:17,115 INFO L251 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-08-18 16:18:17,150 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 16:18:17,154 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 16:18:17,155 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 16:18:17,155 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 16:18:17,155 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 16:18:17,155 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 16:18:17,156 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 16:18:17,157 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 16:18:17,188 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2020-08-18 16:18:17,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-18 16:18:17,204 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:18:17,206 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:18:17,207 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:18:17,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:18:17,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1780468538, now seen corresponding path program 1 times [2020-08-18 16:18:17,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:18:17,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1858311861] [2020-08-18 16:18:17,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:18:17,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:17,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:18:17,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:17,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:18:17,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1858311861] [2020-08-18 16:18:17,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:18:17,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:18:17,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066067660] [2020-08-18 16:18:17,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:18:17,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:18:17,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:18:17,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:18:17,451 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 3 states. [2020-08-18 16:18:17,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:18:17,707 INFO L93 Difference]: Finished difference Result 112 states and 178 transitions. [2020-08-18 16:18:17,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:18:17,709 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-08-18 16:18:17,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:18:17,730 INFO L225 Difference]: With dead ends: 112 [2020-08-18 16:18:17,730 INFO L226 Difference]: Without dead ends: 54 [2020-08-18 16:18:17,735 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:18:17,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-18 16:18:17,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-08-18 16:18:17,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-18 16:18:17,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2020-08-18 16:18:17,797 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 10 [2020-08-18 16:18:17,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:18:17,798 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2020-08-18 16:18:17,798 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:18:17,798 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2020-08-18 16:18:17,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-08-18 16:18:17,799 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:18:17,799 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:18:17,799 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 16:18:17,800 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:18:17,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:18:17,801 INFO L82 PathProgramCache]: Analyzing trace with hash -658139069, now seen corresponding path program 1 times [2020-08-18 16:18:17,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:18:17,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [916271672] [2020-08-18 16:18:17,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:18:17,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:17,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:18:17,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:17,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:18:17,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [916271672] [2020-08-18 16:18:17,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:18:17,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 16:18:17,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172340931] [2020-08-18 16:18:17,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 16:18:17,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:18:17,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 16:18:17,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 16:18:17,918 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand 4 states. [2020-08-18 16:18:18,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:18:18,069 INFO L93 Difference]: Finished difference Result 107 states and 130 transitions. [2020-08-18 16:18:18,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 16:18:18,070 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-08-18 16:18:18,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:18:18,071 INFO L225 Difference]: With dead ends: 107 [2020-08-18 16:18:18,071 INFO L226 Difference]: Without dead ends: 59 [2020-08-18 16:18:18,073 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 16:18:18,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-08-18 16:18:18,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-08-18 16:18:18,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-08-18 16:18:18,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2020-08-18 16:18:18,083 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 11 [2020-08-18 16:18:18,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:18:18,083 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2020-08-18 16:18:18,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 16:18:18,083 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2020-08-18 16:18:18,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-18 16:18:18,084 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:18:18,084 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:18:18,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 16:18:18,085 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:18:18,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:18:18,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1481014552, now seen corresponding path program 1 times [2020-08-18 16:18:18,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:18:18,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [629823138] [2020-08-18 16:18:18,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:18:18,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:18,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:18:18,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:18:18,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-18 16:18:18,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [629823138] [2020-08-18 16:18:18,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:18:18,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 16:18:18,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981263834] [2020-08-18 16:18:18,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 16:18:18,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:18:18,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 16:18:18,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 16:18:18,214 INFO L87 Difference]: Start difference. First operand 58 states and 69 transitions. Second operand 5 states. [2020-08-18 16:18:18,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:18:18,456 INFO L93 Difference]: Finished difference Result 91 states and 109 transitions. [2020-08-18 16:18:18,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 16:18:18,456 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-08-18 16:18:18,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:18:18,458 INFO L225 Difference]: With dead ends: 91 [2020-08-18 16:18:18,458 INFO L226 Difference]: Without dead ends: 89 [2020-08-18 16:18:18,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 16:18:18,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-08-18 16:18:18,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 56. [2020-08-18 16:18:18,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-08-18 16:18:18,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2020-08-18 16:18:18,467 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 15 [2020-08-18 16:18:18,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:18:18,468 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2020-08-18 16:18:18,468 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 16:18:18,468 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2020-08-18 16:18:18,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 16:18:18,469 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:18:18,469 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:18:18,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 16:18:18,470 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:18:18,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:18:18,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1774425742, now seen corresponding path program 1 times [2020-08-18 16:18:18,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:18:18,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [805950150] [2020-08-18 16:18:18,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:18:18,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 16:18:18,512 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 16:18:18,513 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 16:18:18,517 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 16:18:18,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 04:18:18 BoogieIcfgContainer [2020-08-18 16:18:18,535 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 16:18:18,538 INFO L168 Benchmark]: Toolchain (without parser) took 2953.98 ms. Allocated memory was 138.9 MB in the beginning and 234.4 MB in the end (delta: 95.4 MB). Free memory was 100.9 MB in the beginning and 129.7 MB in the end (delta: -28.9 MB). Peak memory consumption was 66.6 MB. Max. memory is 7.1 GB. [2020-08-18 16:18:18,539 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-18 16:18:18,540 INFO L168 Benchmark]: CACSL2BoogieTranslator took 693.22 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 100.6 MB in the beginning and 168.1 MB in the end (delta: -67.4 MB). Peak memory consumption was 24.9 MB. Max. memory is 7.1 GB. [2020-08-18 16:18:18,541 INFO L168 Benchmark]: Boogie Preprocessor took 74.51 ms. Allocated memory is still 201.9 MB. Free memory was 168.1 MB in the beginning and 164.7 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 7.1 GB. [2020-08-18 16:18:18,542 INFO L168 Benchmark]: RCFGBuilder took 711.11 ms. Allocated memory is still 201.9 MB. Free memory was 164.7 MB in the beginning and 111.4 MB in the end (delta: 53.2 MB). Peak memory consumption was 53.2 MB. Max. memory is 7.1 GB. [2020-08-18 16:18:18,543 INFO L168 Benchmark]: TraceAbstraction took 1468.56 ms. Allocated memory was 201.9 MB in the beginning and 234.4 MB in the end (delta: 32.5 MB). Free memory was 111.4 MB in the beginning and 129.7 MB in the end (delta: -18.3 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. [2020-08-18 16:18:18,547 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 693.22 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 100.6 MB in the beginning and 168.1 MB in the end (delta: -67.4 MB). Peak memory consumption was 24.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 74.51 ms. Allocated memory is still 201.9 MB. Free memory was 168.1 MB in the beginning and 164.7 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 711.11 ms. Allocated memory is still 201.9 MB. Free memory was 164.7 MB in the beginning and 111.4 MB in the end (delta: 53.2 MB). Peak memory consumption was 53.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1468.56 ms. Allocated memory was 201.9 MB in the beginning and 234.4 MB in the end (delta: 32.5 MB). Free memory was 111.4 MB in the beginning and 129.7 MB in the end (delta: -18.3 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1027]: 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 = ((void*)0) [L988] head->prev = ((void*)0) [L989] head->data = 0 [L991] SLL* x = head; [L992] int marked = 0; [L995] COND TRUE __VERIFIER_nondet_int() || !marked [L998] x->next = malloc(sizeof(SLL)) [L999] EXPR x->next [L999] x->next->prev = x [L1000] EXPR x->next [L1000] x = x->next [L1001] x->next = ((void*)0) [L1003] COND TRUE __VERIFIER_nondet_int() [L1005] marked = 1 [L1008] COND TRUE \read(marked) [L1009] x->data = 1 [L995] COND FALSE !(__VERIFIER_nondet_int() || !marked) [L1014] x = head [L1016] COND FALSE !(!(((void*)0) != x)) [L1017] marked = 0 [L1019] EXPR x->next [L1019] x->next != ((void*)0) && x->next->data == 0 [L1019] EXPR x->next [L1019] EXPR x->next->data [L1019] x->next != ((void*)0) && x->next->data == 0 [L1019] COND FALSE !(x->next != ((void*)0) && x->next->data == 0) [L1024] EXPR x->next [L1024] x->next != ((void*)0) && __VERIFIER_nondet_int() [L1024] x->next != ((void*)0) && __VERIFIER_nondet_int() [L1024] COND TRUE x->next != ((void*)0) && __VERIFIER_nondet_int() [L1026] EXPR x->next [L1026] x = x->next [L1027] EXPR x->data [L1027] COND TRUE !(x->data != 1) [L1027] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 61 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.3s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 168 SDtfs, 156 SDslu, 68 SDs, 0 SdLazy, 243 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=61occurred 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, 3 MinimizatonAttempts, 34 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 61 NumberOfCodeBlocks, 61 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 33 ConstructedInterpolants, 0 QuantifiedInterpolants, 1050 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 2/2 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...